Liebert® iCOM™
User Manual—Intelligent Communications & Monitoring for Liebert CRV™
Table of Content
1.0 Getting Started with iCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Touchscreen display and user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Touchscreen status dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.1 Dial background-color status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Control header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3.1 Powering-on iCOM and Logging-in/Unlocking controls . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Powering-on the cooling unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.3 Powering-off the cooling unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.4 Logging out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.5 Calibrating the touchscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.6 Setting the date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.7 Searching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1.4 Using Context-sensitive Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.5 About iCOM version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.6 Accessing the User and Service functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.7 User menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.0 Monitoring and Managing the CRV with Liebert® iCOM® . . . . . . . . . . . 15
2.1 Automatic restart after power failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 Loss-of-power notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3 Variable-speed fan control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Manual fan-speed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1.1 Setting remote fan-speed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Automatic fan-speed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 Minimum Fan Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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2.4 Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4.1 Advanced DX Freeze Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 Advanced DX High-pressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3 High-pressure Lock-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.4 High-temperature Lock-off for Digital-scroll compressors . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.5 Short-cycle protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.6 Motorized Ball Valves for Water/Glycol-cooled Units with Digital-scroll Compressors . . .
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3.0 User Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Viewing and Editing setpoints for the cooling unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1.1 Editing humidity setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.1.2 Editing temperature setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 Viewing cooling-unit alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2.1 Silencing an audible alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2.2 Acknowledging alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3 Viewing the event log for a cooling unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.4 Viewing sensor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.5 Managing run hours for a component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.5.1 Setting run hours to zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.6 Viewing remote-sensor readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.6.1 Adjusting the range of remote-sensor graphs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.6.2 Removing/Adding sensors to the view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.7 Viewing teamwork, stand-by, cascade and operating status for the cooling units . . . . . . 32
4.0 Service Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1 Editing setpoints for the cooling unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1.1 Configuring Temperature setpoints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1.1 Considerations when using PI temperature control . . . . . . . . . . . . . . . . . . . . . .
4.1.2 Configuring high/low-limit setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.3 Configuring humidity setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.4 Configuring fan setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4.2 Scheduling Condenser and Cooling-unit tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.1 Scheduling low-noise operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.2 Scheduling condenser-fan reversal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.3 Setting general cooling-unit options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.3.1 Setting miscellaneous options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Setting fan options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Setting compressor options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3.1 Setting Low-pressure Time Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3.2 Adjusting Ball-valve Pressure Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.4 Setting Reheat options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.5 Setting Humidifier options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.6 Setting Dehumidification options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.7 Setting water-leak detector options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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5.0 Managing Events: Alarms, Warnings and Messages . . . . . . . . . . . . . . . 55
5.1 Event properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.2 Enabling events and editing event settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.3 Selecting event type and setting alarm/warning notification . . . . . . . . . . . . . . . . . . . . . . . 57
5.4 Enabling the audible alarm notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5.5 Remote-alarm device and Customer-input events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5.5.1 Setting-up customer-input events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
6.0 U2U Networking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6.1 Preparing for U2U Group Set-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6.2 Configuring U2U network settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.2.1 Addressing network-settings issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.2.2 Modifying unit-to-unit network settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.0 Teamwork, Stand-by and Rotation for Cooling Units. . . . . . . . . . . . . . . 69
7.1 Teamwork Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.1.1 No Teamwork—multiple zones in one room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.2 Teamwork Mode 1—parallel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.3 Teamwork Mode 2—independent operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.4 Teamwork Mode3—optimized-aisle operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.4.1 Setting-up Teamwork mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7.2 Assigning Cooling Units to Stand-by (Lead/Lag). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.3 Setting a Rotation Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
7.3.1 Manually rotate operating and stand-by units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.0 External Monitoring and Building-management Systems . . . . . . . . . . . 77
8.1 Building Management Systems Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.1.1 Adjusting monitoring (IntelliSlot) settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.1.2 Setting BMS control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
9.0 Configuring Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.1 Fluid-temperature Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.2 Wired Remote Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
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10.0 Administering Firmware, Settings and Security. . . . . . . . . . . . . . . . . . 87
10.1 iCOM firmware upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10.1.1 Compatibility with earlier versions of iCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.2 Updating iCOM display firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.3 Updating iCOM control-board firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.3.1 Unlocking the control board before upgrade . . . . . . . . . . . . . . . . . . . . . . . . . .
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10.2 Managing access permission and PINs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10.3 Backing-up, Importing/Exporting and Restoring settings . . . . . . . . . . . . . . . . . . . . . . . . 91
10.3.1 Backing-up settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.3.2 Restoring settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.3.3 Exporting settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.3.4 Importing settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.3.5 Resetting display settings to defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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10.4 Configuring with the start-up wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
11.0 Performing Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11.1 Cooling-unit status LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11.2 Enabling manual mode for diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11.2.1 Disabling diagnostics manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
11.3 Diagnosing evaporator-fan issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
11.4 Diagnosing compressor-circuit issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
11.4.1 Resetting High-pressure Alarm Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
11.4.2 Resetting High-temperature Alarm Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
11.5 Diagnosing reheat issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
11.6 Diagnosing humidifier issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
11.7 Diagnosing digital-output issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
11.8 Diagnosing analog-output issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
11.9 Diagnosing customer-input issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
11.10 Diagnosing dehumidifier issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
11.11 Managing brown-out protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
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12.0 Customizing Your iCOM Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
12.1 Setting general display properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
12.2 Customizing main-display views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
12.2.1 Creating a display view layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.2.2 Editing a display view layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.2.3 Selecting the display view for the main display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.2.4 Removing a custom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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12.3 Customizing panel content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
12.3.1 Accessing panel-edit mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.2 Replacing panel content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.3 Resizing and Moving a panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.4 Removing a panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.5 Adding content to a status panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.6 Moving content in a status panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.7 Customizing the status dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.3.8 Selecting Graphical/List view for status and dates . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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12.4 Customizing parameter and field labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
13.0 Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
13.1 Installing Wired Remote Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
13.1.1 Setting DIP switches and labeling 2T sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1.2 Terminating the last sensor on the CANbus link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1.3 Routing CANbus cable and preparing for sensor installation . . . . . . . . . . . . . . . . . . . .
13.1.3.1 Preparing for sensor-cabling
of CRV 300 mm (12 in.) units—CR019 and CR032 . . . . . . . . . . . . . . . . . . . .
13.1.3.2 Preparing for sensor cabling
of CRV 600 mm (24 in.) units—CR020, CR035 and CR040 . . . . . . . . . . . . . .
13.1.4 Installing 2T sensors in the racks to monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1.5 Connect the CANbus cable and ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13.2 U2U Network Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
13.2.1 Required network equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2.2 Plan wiring runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2.3 U2U Wiring connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2.3.1 U2U network requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2.4 Wiring Cooling Units without Wall-mount Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2.5 Wiring Cooling Units with Wall-mount Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of Figures
Figure 1-1: iCOM main display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 1-2: Dial sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 1-3: Dial background colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 1-4: Pin Required panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 1-5: Turn Unit On dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 1-6: Unit status on iCOM display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 1-7: Date and time editable on control header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 1-8: Date and time selector dialogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 1-9: Global display search results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 1-10: User and Service icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 1-11: User menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 1-12: Service menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 3-1: Setpoints panel—user options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 3-2: User Setpoints—Humidity Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 3-3: User Setpoints—Temperature Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 3-4: Alarms panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 3-5: Alarm Details panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 3-6: Event Log panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 3-7: Sensor Data panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 3-8: Run Hours panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 3-9: Remote Sensors panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 3-10: Edit Graph Range dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 3-11: Teamwork icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 3-12: Teamwork dialog—User view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 4-1: Setpoints panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 4-2: Setpoints—Temperature Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 4-3: Setpoints—High/Low Limit Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 4-4: Setpoints—Humidity Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 4-5: Setpoints—Fan Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 4-6: Scheduler panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 4-7: Scheduler—Condenser Setback Task Properties panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 4-8: Scheduler—Condenser Fan Reversal Task Properties panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 4-9: Options Setup panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 4-10: Misc Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 4-11: Fan Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 4-12: Compressor Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 4-13: Reheat Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 4-14: Humidifier Settings panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 4-15: Dehumidification Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 4-16: Water Leakage Detector panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 5-1: Alarms & Events panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
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Figure 5-2: Edit panel for notification properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 5-3: Customer-input set-up on the RAD-input Edit panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 6-1: Example layout stand-by/operating unit-address assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 6-2: U2U Network Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 6-3: Network settings Issue(s) button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 6-4: Network ISSUES dialog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 7-1: Teamwork icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 7-2: Teamwork dialog—Service view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 7-3: Teamwork/Standby panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 7-4: Teamwork Mode Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 7-5: Standby Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 7-6: Unit Rotation Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 8-1: BMS Setup panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 8-2: BMS IntelliSlot Card Settings panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 8-3: BMS Control Settings panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Figure 9-1: Fluid Sensors—Sensor Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure 9-2: Wired Remote Sensor—Setup Sensor Properties panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure 9-3: Wire-remote sensor—Specific-sensor properties panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Figure 10-1: Firmware Upgrade Parameters panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Figure 10-2: Manage Pins and Role Properties panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure 10-3: Backup & Restore panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 10-4: Start-up wizard panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Figure 11-1: Manual Mode panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Figure 11-2: Diagnostics—Evaporator Fan panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Figure 11-3: Diagnostics—Compressor Circuit panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Figure 11-4: Diagnostics—Reheat panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure 11-5: Diagnostics—Humidifier panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Figure 11-6: Diagnostics—Digital Output panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Figure 11-7: Diagnostics—Analog Output panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Figure 11-8: Diagnostics—Customer Inputs panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Figure 11-9: Diagnostics—Dehumidifier panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 11-10: Diagnostics—Brown-out protection panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Figure 12-1: Unit Display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure 12-2: Panel Content panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Figure 12-3: Panel Content and Options for creating/editing view and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Figure 12-4: Change Content button in panel-edit mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Figure 12-5: Change Content dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Figure 12-6: Panel edit options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure 12-7: Add parameter dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Figure 12-8: Touch-and-hold to access dial set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Figure 12-9: Dial Control Setup panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Figure 12-10: Graphical/List view switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 12-11: Custom Labels panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
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Figure 13-1: 2T sensor for rack monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Figure 13-2: DIP-switch opening/DIP switches inside of 2T sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Figure 13-3: DIP switches in 2T sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Figure 13-4: Sensor CANbus arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Figure 13-5: Termination-jumper on 2T circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Figure 13-6: CANbus wire routing for CRV 300 mm (12 in.) units—CR019 and CR032 . . . . . . . . . . . . . . . . . . . 124
Figure 13-7: Remove Termination plug and insert CAN cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Figure 13-8: CANbus top-entry wiring for CRV 600 mm (24 in.) units—CR020, CR035, and CR040 . . . . . . . . . 126
Figure 13-9: Remove Termination plug and insert CAN cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Figure 13-10: Rack sensor placement for 600 mm (24 in.) models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Figure 13-11: Rack sensor placement for 300 mm (12 in.) models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Figure 13-12: CANbus and ground connection on 2T sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Figure 13-13: Connecting 300 mm (12 in.) units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Figure 13-14: Connecting 600 mm (24 in.) units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
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List of Tables
Table 1-1: Background color displayed by selected value and threshold limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 1-2: Cooling-unit statuses displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2-1: Fan-speed controlling sensor options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 3-1: Alarm status/type indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 3-2: Events that clear without acknowledgment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 3-3: Event status/type indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 4-1: PI temperature-control troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 5-1: Notification types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 5-2: Events supported by Liebert CRV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 5-3: Events specific to Liebert MC Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 5-4: Customer-input Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 6-1: Issues button status colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 11-1: Cooling-unit LED colors and state meanings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Table 12-1: Panel-content options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Table 12-2: Status-dial set-up options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Table 13-1: DIP-switch settings for factory-supplied rack sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Table 13-2: DIP-switch settings for wired-remote sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Table 13-3: Example iCOM U2U Network Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
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Getting Started with iCOM
1.0 Getting Started with iCOM
The Liebert iCOM offers the highest capability for unit control, communication, and monitoring of Liebert
Thermal Management units. It is available factory-installed on new units and assemblies or may be
retrofitted in existing units.
1.1 Touchscreen display and user interface
The Liebert iCOM touchscreen and user interface speeds set up and installation and simplifies control of
Liebert cooling units, literally putting cooling-system monitoring and management at your fingertips.
• The resistive touchscreen is used with a firm touch, or consider using a stylus when interacting with
the touchscreen.
• User and service menus are password-protected to prevent unauthorized changes to cooling-unit
operation.
• The touchscreen is back-lit and auto-dims after a period on non-use, then turns off. Touch the screen
to illuminate the main screen.
• iCOM ships with default settings for efficient and effective operation of most cooling-units and is easily
configured to meet any need.
• iCOM menus and displays are based on the options installed on the cooling units that it monitors and
manages.
Figure 1-1 shows the controls and options available on the main display.
Figure 1-1 iCOM main display
Main display controls and options
Menu icon
When unlocked, displays a menu for user or service options depending on which icon is selected.
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User icon
When selected, the user options are available on the main display and menu.
Note: You must unlock the display with the User PIN to access the menu and options.
See 1.3.1 - Powering-on iCOM and Logging-in/Unlocking controls.
Service icon
When selected, the service options are available on the main display and menu.
Note: You must unlock the display with the Service PIN to access the menu and options.
See 1.3.1 - Powering-on iCOM and Logging-in/Unlocking controls.
Control header
Controls to access the user and service menus. See 1.3 - Control header.
Search icon
Open the keyboard to search for controls and setting locations. See 1.3.7 - Searching.
Lock/Unlock icon
Indicates whether or not the user and service options are accessible.
• Locked icon = display is read-only
• Unlocked icon = User or service is logged-in and options are accessible.
See 1.3.1 - Powering-on iCOM and Logging-in/Unlocking controls.
Teamwork-mode icon
In a panel with “Status” content, the Teamwork Mode icon indicates the mode selected. For details and
descriptions the teamwork controls, see 7.1 - Teamwork Modes.
Status Dial
Circular display of setpoints and environmental conditions of the unit. See 1.2 - Touchscreen status dial.
Primary-content panel
When accessing settings/configuration via the menus, a list of options/categories display in the left,
“primary” panel. The main display is configurable to up-to 4 independent panels, see 12.2 - Customizing
main-display views.
Cooling-unit parameters
Status display of selected system parameter settings. See 12.3.5 - Adding content to a status panel.
Secondary-content panel
When accessing settings/configuration via the menus, the settings display in the right, “secondary” panel.
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Getting Started with iCOM
1.2 Touchscreen status dial
The dial in the primary-control panel is divided into four, customizable, read-only sections that display
setpoints and environmental conditions for unit status at a glance. See Figure 1-2 and Dial sections list.
The center of the dial displays sensor readings and changes color according to alarm thresholds as the
readings rise and fall. When the cooling unit is powered-off, the center of the dial is gray.
For detailed descriptions of the sections and customizing the dial, see 12.3.7 - Customizing the status
dial.
Figure 1-2 Dial sections
Dial sections
Upper-center sensor reading
Selected sensor reading.
Note: If the upper sensor reading has threshold settings, the dial background color will change color
based on those thresholds. See 1.2.1 - Dial background-color status indication.
Lower-center sensor reading
Single or multiple sensor readings. Cycle through readings by touching the displayed reading.
Left setpoint
Setpoint and control sensor used for setpoint calculations.
Right setpoint
Setpoint and control sensor used for setpoint calculations.
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1.2.1
Dial background-color status indication
The background color of the dial indicates whether or not the unit is powered-on, and it also responds to
threshold settings of the upper-center sensor reading, Figure 1-3. The displayed color is not related to
over/under-threshold events nor is it related to alarms/warnings. Table 1-1 describes the background color
displayed if the selected sensor reading has threshold limits set.
Figure 1-3 Dial background colors
Table 1-1
Background color displayed by selected value and threshold limit
Sensor/Value
selected
Return Temp
Return Humidity
Supply Temp
Supply Humidity
Average Rack Temp
Max Rack Temp
Min Rack Temp
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Threshold limit
Background
color
None
Blue
High return temperature
Red
Low return humidity
Blue
High return humidity
Red
Low supply temperature
Blue
High supply temperature
Red
None
Blue
None
Red
Low remote temperature
Blue
High remote temperature
Red
Low remote temperature
Blue
High remote temperature
Red
Low remote temperature
Blue
High remote temperature
Red
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Getting Started with iCOM
1.3 Control header
The control header contains the controls to access the user and service settings. The display is locked
when started initially and when restarted after a period of inactivity.
1.3.1
Powering-on iCOM and Logging-in/Unlocking controls
iCOM is powered-on when power is switched on at the cooling unit’s disconnect switch and you activate
the display by touching it.
iCOM is locked when started and also locks after a period of inactivity to prevent unauthorized changes. A
personal identification number (PIN) is required to access the user and service menus and options.
NOTE
The factory-default inactivity period is 1 minute. To change the inactivity period, see 12.1 - Setting
general display properties.
NOTE
The factory-default PIN for user and service login are provided. We recommend you change PINs
as necessary to prevent unauthorized changes. See 10.2 - Managing access permission and
PINs, page 90.
• Default User PIN = 1490
• Default Service PIN = 5010
1. On the header, touch the lock,
.
The PIN REQUIRED keypad opens, Figure 1-4.
2. Touch the numbers for your PIN, then touch Enter.
Depending on the PIN entered and your level of access, the User and/or Service options are
accessible. See 1.6 - Accessing the User and Service functions.
Figure 1-4 Pin Required panel
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1.3.2
Powering-on the cooling unit
NOTE
Depending on the operating state, there are start/stop priority switches that may prevent the
cooling unit from operating even though power to the unit is switched on and you have turned it on
via iCOM.
The cooling unit operates only when all switches are closed. For example, even though you have
turned-on the unit through iCOM, if the BMS remote-monitoring system is sending a command to
turn-off the unit, the cooling unit remains off.
NOTE
You must be logged-in to access the menu options. See 1.3.1 - Powering-on iCOM and
Logging-in/Unlocking controls.
1. On the User menu, touch Turn Unit On.
The TURN UNIT ON dialog opens, Figure 1-5.
2. Touch Turn Unit On.
The cooling unit starts and the operating status is displayed as shown in Figure 1-6.
Refer to Table 1-2 - Cooling-unit statuses displayed.
Figure 1-5 Turn Unit On dialog
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Getting Started with iCOM
Figure 1-6 Unit status on iCOM display
Table 1-2
Unit Status Text
Cooling-unit statuses displayed
Description
ALARM OFF
An alarm forced the unit to turn off. See 3.2 - Viewing cooling-unit alarms.
MANUAL
Controlled by a service technician. See 11.2 - Enabling manual mode for diagnostics.
DISPLAY OFF
Unit is turned Off at the iCOM display. See 1.3.2 - Powering-on the cooling unit.
ALARM STANDBY
In stand-by because of an active alarm on the unit. See 3.2 - Viewing cooling-unit alarms.
STANDBY
In standby because of service-menu setting. See 7.2 - Assigning Cooling Units to Stand-by
(Lead/Lag).
UNIT ON
Operating normally without alarms or warnings.
WARNING ON
Active warning, but still operating. See 3.2 - Viewing cooling-unit alarms.
ALARM ON
Active alarm, but still operating. See 3.2 - Viewing cooling-unit alarms.
REMOTE OFF
Turned-off by remote shutdown terminal.
Occurs when a normally-closed set of 24-V contacts opens. The Remote On/Off and Display On/Off
switches are in series, and the cooling unit will only turn-on ii both switches are “on.” If one is “off,” the
unit turns off.
MONITORING OFF
Turned-off by remote monitoring system.
Check the remote monitoring device or call 800-543-2778 for assistance.
RESTART DELAY
Not yet operational after a power cycle because the restart-delay timer is active.
1.3.3
Powering-off the cooling unit
NOTE
You must be logged-in to access the menu options. See 1.3.1 - Powering-on iCOM and
Logging-in/Unlocking controls.
1. On the User menu, touch Turn Unit Off.
The TURN UNIT OFF panel opens.
2. Touch Turn Unit Off.
The cooling unit begins a power-off countdown then powers-off.
1.3.4
Logging out
Log-out occurs automatically when the display back light turns-off for inactivity.
NOTE
The factory-default inactivity period is 1 minute. To change the inactivity period, see 12.1 - Setting
general display properties.
• To log-out manually, touch the lock icon.
The icon indicates “locked.”
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1.3.5
Calibrating the touchscreen
Use a firm touch or a stylus for the best response. To improve interaction with quicker and more-accurate
touch response, calibrate the touchscreen.
1. On the User menu, touch Display Options > Display Properties.
2. On the UNIT DISPLAY panel, touch Calibrate Screen and follow the prompts to calibrate.
• If you cannot access the calibration because of screen response, continue with Step 3.
3. At the cooling-unit disconnect switch, power-off the unit and then back on.
4. Touch your finger to the screen and hold it there while the display boots.
5. When the LED begins flashing, remove your finger.
Cross-hairs appear in each corner and in the center of the display.
6. Touch the center of each cross-hair ONCE ONLY. (Touching more than once interrupts the calibration
and you must start over at Step 3.)
Cross-hairs disappear and the display reboots when calibration is complete.
1.3.6
Setting the date and time
The correct date and time is critical for warnings, alarms, and scheduling.
1. On the header, touch-and-hold the date and time.
The fields become accessible, Figure 1-7.
2. Touch the date field, select the date and touch OK, Figure 1-8.
– or –
Touch the time field, use the arrows to set the time, and touch OK.
NOTE
The date selector has a preference switch in the upper-right corner. It selects between a graphical
or list view. See 12.3.8 - Selecting Graphical/List view for status and dates.
3. On the header, touch Set to commit the changes, Figure 1-7.
• Touch the X icon to cancel the changes.
Figure 1-7 Date and time editable on control header
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Getting Started with iCOM
Figure 1-8 Date and time selector dialogs
1.3.7
Searching
When logged-in, you can use the display search to find the location of settings options based on the
service codes or field names used in the iCOM before the touchscreen model.
NOTE
You must be logged-in to access the display search. See 1.3.1 - Powering-on iCOM and
Logging-in/Unlocking controls.
1. In the control header, touch
The keyboard opens.
.
2. Type the term and touch Go.
A list of locations that contain the searched term opens, Figure 1-9.
3. Touch an item, then touch Go to open the panel for the selected location.
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Figure 1-9 Global display search results
1.4 Using Context-sensitive Help
Touching the Help icon,
, on the right-hand side of the display opens the Help drawer with
information about the panel or dialog currently on the display.
You can use search and the topic index to find further information.
To close the Help drawer, touch the close arrow,
.
1.5 About iCOM version
The version, build, and other firmware information may be helpful when servicing or troubleshooting.
1. Touch
, then
.
The User menu opens.
2. Touch About.
The ABOUT panel opens.
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Getting Started with iCOM
1.6 Accessing the User and Service functions
iCOM operating functions that monitor and control a cooling unit are accessed via the User and Service
menus.
NOTE
You must be logged-in to access the menu options. See 1.3.1 - Powering-on iCOM and
Logging-in/Unlocking controls.
1. To access a menu, touch the icon for the menu you want in the control header, Figure 1-10.
The icon background becomes white when selected indicating that this is the menu content that will be
displayed.
2. Touch the menu icon,
.
The menu opens, Figure 1-11 and Figure 1-12.
Figure 1-10 User and Service icons
1.7 User menu
Figure 1-11 User menu
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User menu options
Setpoints
Opens the SETPOINTS panel. See 3.1 - Viewing and Editing setpoints for the cooling unit.
Active Alarms
Opens the ALARMS panel. See 3.2 - Viewing cooling-unit alarms.
Event Log
Opens the EVENT LOG panel. See 3.3 - Viewing the event log for a cooling unit.
Sensor Data
Opens the SENSOR DATA panel. See 3.4 - Viewing sensor data.
Display Options
Opens the Display Options menu:
• Customize Layout—see 12.2 - Customizing main-display views.
• Custom Labels—see 12.4 - Customizing parameter and field labels.
• Display Properties—see 12.1 - Setting general display properties.
Total Run Hours
Opens the RUN HOURS panel. See 3.5 - Managing run hours for a component.
About
Opens the ABOUT panel. See 1.5 - About iCOM version.
Turn Unit On/Off
Depending on unit’s status, open the TURN UNIT ON or TURN UNIT OFF dialog. See 1.3.2 - Poweringon the cooling unit, or 1.3.3 - Powering-off the cooling unit.
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Getting Started with iCOM
1.8 Service menu
Figure 1-12 Service menu
Service Menu Options
Setpoints
Opens the SETPOINTS panel. See 4.1 - Editing setpoints for the cooling unit
Diagnostic/Service
Opens the Diagnostic / Service menu:
• Diagnostics—see 11.0 - Performing Diagnostics.
• Technical Support—contact information for the cooling unit and iCOM display.
Alarm/Event Setup
Opens the ALARMS & EVENTS panel. See 5.0 - Managing Events: Alarms, Warnings and Messages.
BMS & Teamwork Setup
Opens the BMS & Teamwork Setup menu:
• U2U Setup—See 6.2 - Configuring U2U network settings.
• Teamwork/Standby—See 7.0 - Teamwork, Stand-by and Rotation for Cooling Units.
• BMS Setup—See 8.1 - Building Management Systems Operation.
Scheduler
Opens the SCHEDULER panel. See 4.2 - Scheduling Condenser and Cooling-unit tasks.
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Options Setup
Opens the OPTIONS SETUP panel. See 4.3 - Setting general cooling-unit options.
Auxiliary Device Setup
Opens the Auxiliary Device Setup menu:
• Sensors—See 9.2 - Wired Remote Sensors.
Backup & Security
Opens the Backup & Security menu:
• Backup and Restore. See 10.3 - Backing-up, Importing/Exporting and Restoring settings.
• Load Firmware. See 10.1 - iCOM firmware upgrades.
• Manage Permissions. See 10.2 - Managing access permission and PINs.
Turn Unit On/Off
Depending on unit’s status, open the TURN UNIT ON or TURN UNIT OFF dialog. See 1.3.2 - Poweringon the cooling unit, or 1.3.3 - Powering-off the cooling unit.
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Monitoring and Managing the CRV with Liebert® iCOM®
2.0 Monitoring and Managing
the CRV with Liebert® iCOM®
2.1 Automatic restart after power failure
Set the cooling unit to return to the status at which it was operating when input power returns after a power
failure. (“On” if it was powered-on and “Off” if it was powered-off before the failure.)
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Misc Settings.
The MISC SETTINGS panel displays.
3. Set Auto Restart Enable to Yes, and use the slider to set the number of seconds to delay before
restart, then click Save.
Automatic restart is enabled.
• Touch Cancel to discard the changes without saving.
2.2 Loss-of-power notification
When power is restored after an interuption, a Loss-of-power alarm lets you know that the interruption
occured. Once acknowledged, the alarm resets after 30 minutes. You can disable the event notification, set
the noticfication delay and change event type.
1. On the Service menu, touch Alarm/Event Setup.
2. On the ALARMS & EVENTS panel, touch Misc Events to expand it, then touch LOSS OF POWER.
3. On the EDIT panel, touch Notifications.
The EDIT panel displays the notification properties.
4. Adjust the notification properties, then touch Save.
The notification is updated.
• Touch Cancel to discard the changes without saving.
2.3 Variable-speed fan control
Air flow is adjustable via iCOM manually using a building-managment system (BMS) or automatically using
locally-installed temperature sensors.
NOTE
Cooling units ship with the factory setting “Return Sensor” for the temperature-control sensor and
the fan-speed-control sensor.
2.3.1
Manual fan-speed control
In Manual fan-control mode, the speed of the motor can be set in one of the following ways:
• The manual (fixed) fan speed may be set via iCOM.
• Remotely using a Liebert IntelliSlot® card.
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2.3.1.1
Setting remote fan-speed control
1. On the Service menu, touch Setpoints > Fan Control, set Fan Control Type to Manual, then touch
Save.
2. On the Service menu, touch BMS & Teamwork Setup > BMS Setup.
3. On BMS SETUP, touch Control Settings.
The CONTROL SETTINGS sencondary panel displays:
• In Fan Control Sensor, select Manual.
• Touch Save.
BMS control of fan speed is set, and the BMS-set fan speed is displayed on the Fan Speed slider.
NOTE
Set the fan speed via BMS by writing to the Fan Speed Maximum Set Point monitoring point. For
details, see SL-28170 IntelliSlot Reference Guide found at www.liebert.com.
NOTE
Local adjustments to fan speed are overridden when remote/BMS fan-speed control is set.
2.3.2
Automatic fan-speed control
Liebert iCOM on the CRV is factory-set for supply-air sensor control of fan speed and cooling capacity to
ensure that the CRV is delivering precise cooling to the cold aisle.
Remote rack sensors allows decoupling of fan speed and cooling capacity for the preferred operating
method of CRV(s) in a hot/cold-aisle configuration. Decoupling modulates cooling capacity based on
supply-sensor readings and relies on readings from the remote rack sensors for fan control to ensure that
cool air is delivered to the rack inlets on the cold aisle.
In the Setpoint screen, the controlling temperature sensor (S102) can be set to either Supply, Return or
Remote. As the selection is changed from one sensor to another, the setpoint is displayed next to the
corresponding sensor on the illustration, showing the sensors placement in relation to the Liebert CRV.
Temperature sensors can control fan-speed using one of three modes based on the type of sensor
selected as the fan-control sensor: supply, return, or remote, see Table 2-1. Control is based on the
selected sensor for both fan control and temperature control and their setpoints as follows:
• Coupled—the fan-control and temperature-control sensor selection is the same. When coupled, fan
speed is determined by the temperature setpoints.
• Decoupled—the fan-control and temperature-control sensor selection is different. When decoupled,
fan speed is determined by the fan setpoints.
Table 2-1
Fan-speed controlling sensor options
Temperature Control Sensor selected
Fan Control Sensor
selected
Supply Sensor
Remote Sensor
Return Sensor
Supply Sensor
Coupled
N/A
N/A
Remote Sensor
Decoupled
(Recommended)
Coupled
N/A
Return Sensor
Decoupled
Decoupled
Coupled
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Monitoring and Managing the CRV with Liebert® iCOM®
To set parameters for automatic fan-speed control:
1. On the Service menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Fan Control in the Options list,
• Set Fan Control Type to Manual
• Select a Fan Control Sensor.
• Adjust the setpoint options, then touch Save.
Sensor-based fan-speed control is set.
3. Touch Temperature Control in the Options list.
4. On the TEMPERATURE CONTROL secondary panel:
• Select a Temperature Control Sensor.
• Adjust the setpoint options, then touch Save.
2.3.3
Minimum Fan Speed
The minimum fan speed is design-specific for CRV operation, is factory-set, and cannot be modified.
NOTE
Contact your local Emerson representative if minimum fan speed must be lowered.
2.4 Compressor Protection
2.4.1
Advanced DX Freeze Protection
Advanced, DX freeze protection automatically prevents freezing condensate on the coil when fan speed is
below 100% by predicting freeze conditions and adjusting fan speed and compressor capacity.
A pressure transducer is installed in your Liebert CRV so that the advanced, low-pressure routine is
automatically used.
2.4.2
Advanced DX High-pressure Protection
Advanced DX high-pressure protection automatically prevents total loss of cooling from high-pressure
lock-outs by adjusting compressor capacity when pressure fluctuations are detected.
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2.4.3
High-pressure Lock-off
At compressor start-up, iCOM monitors for high-pressure conditions, and if detected during the first 10
minutes of operation, the cooling unit attempts to correct the problem without an event notification. If the
problem is not corrected, an alarm notification occurs and the affected compressor is locked “off.” After the
initial 10-minute period, a high-pressure situation immediately prompts an alarm and locks the compressor
“off” without attempting correction.
NOTE
If athe cooling unit is equipped with manual-reset high-head-pressure switches or if the auto-reset
high-head-pressure switches do not reset, there is 30-second delay between the occurence of
high head-pressure and the alarm notification.
If a high-head-pressure alarm event trips 3 times in a rolling 12-hour period, the affected compressor is
locked “off.” Once locked-off, the compressor remains locked-off even if pressure drops below the alarm
threshold.
Unlock the compressor in one of the following ways:
• Cycle main power of the cooling unit.
– or –
• Reset the high-pressure alarm code via iCOM Diagnostics.
To unlock the compressor:
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Pressure Alarm Code,
then touch Save.
The code is reset and the compressor can now operate.
2.4.4
High-temperature Lock-off for Digital-scroll compressors
Cooling units equipped with digital-scroll compressors with a thermister provide protection via a maximum
operating temperature for the compressor(s). A high-temperature situation prompts an alarm notification
and locks the compressor “off” for at least 30 minutes. The compressor will resume operation if the
temperature has cooled to safely operate after 30 minutes.
If a high-temperature alarm event occurs 5 times in a rolling 5-hour period, the compress is locked-out.
Once locked-off, a compressor can be unlocked in one of the following ways:
• Cycle main power of the cooling unit.
– or –
• Reset the high-temperature alarm counter via iCOM Diagnostics.
To unlock the compressor:
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Compressor Circuit N in the Category list (where N is the circuit number of the locked-off
compressor).
3. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Temperature Alarm Counter,
then touch Save.
The code is reset and the compressor can now operate.
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Monitoring and Managing the CRV with Liebert® iCOM®
2.4.5
Short-cycle protection
A start-to-next-start delay is applied to each compressor in a unit. The 3-minutes-on/3-minutes-off delay
helps maximize compressor life.
A short-cycle occurs when the compressor cycles on and off 10 times withing an hour. The start-to-nextstart delay may cause a short cycle if there is a very-light room load or if control settings are too tight.
NOTE
If short-cycling continues after adjusting the control settings, contact technical support at 800-5432778 to adjust the mimum compressor off delay.
2.4.6
Motorized Ball Valves
for Water/Glycol-cooled Units with Digital-scroll Compressors
Because a conventional water-regulating valve opens and closes excessively from the rapid pressure
changes during un-loaded operation, water/glycol-cooled units with digital-scroll compressors monitor
liquid-line transducers and regulate fluid flow through the heat exchanger with a motorized ball vavle
(MBV).
The MBV reduces the number of times the valve opens and closes based on a pressure-threshold setpoint
in iCOM’s compressor-settings options. The pressure-offset adds psi to increase valve sensitivy and cause
the valve to open further the higher the added pressure. The ball-valve setting is specific to the cooling unit
to maintain system pressure.
NOTE
Only a properly-trained and qualified technician should modify the motorized ball valve setting.
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User Operation
3.0 User Operation
3.1 Viewing and Editing setpoints for the cooling unit
NOTE
User-level access allows viewing and editing only a limited number of setpoints. To view or adjust
all setpoints, you must have service-level access. See 4.1 - Editing setpoints for the cooling
unit, page 33, in the Service Operation section.
Figure 3-1 Setpoints panel—user options
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User Operation
3.1.1
Editing humidity setpoints
1. On the User menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Humidity Control in the Options list.
The HUMIDITY CONTROL secondary panel opens, Figure 3-2.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
Figure 3-2 User Setpoints—Humidity Control panel
User humidity set-point options
Humidity Setpoint
Humidity level by adding moisture to or removing moisture from the air.
Humidity Control Sensor
Selects sensor used when calculating relative humidity.
Humidity Setpoint 2
Alternate setpoint activated by customer input (remote-alarm device/RAD). When customer input
connection = 2nd Setpoint, this value becomes the active humidity setpoint.
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User Operation
3.1.2
Editing temperature setpoints
1. On the User menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Temperature Control in the Options list.
The TEMPERATURE CONTROL secondary panel opens, Figure 3-2.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
Figure 3-3 User Setpoints—Temperature Control panel
User temperature set-point options
Temperature Setpoint Act
Read-only display of adjusted temperature setpoint when one of the following is active:
• Customer-input setpoint (remote-alarm device)
Temperature Setpoint
Temperature that the unit maintains via cooling.
Temperature Control Sensor
Selects sensor that controls cooling.
Temperature Setpoint 2
Alternate setpoint activated by customer input (remote-alarm device/RAD). When customer input
connection = 2nd Setpoint, this value becomes the active temperature setpoint.
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3.2 Viewing cooling-unit alarms
The ALARMS panel lists active alarm and warning events. Table 3-1 describes the type and state of the
alarm shown by indicator dots.
Table 3-1
Alarm status/type indicators
Indicator
Description
Yellow dot
Warning event.
Red dot
Alarm event.
Circle
Event condition has cleared, but still must be acknowledged.
See 3.2.2 - Acknowledging alarms, page 26.
1. On the User menu, touch Alarms.
The ALARMS panel opens, Figure 3-4.
2. Touch an alarm to display the ALARM DETAILS panel, Figure 3-5.
Figure 3-4 Alarms panel
Alarm fields
Alarm
Name of the event.
Date
Date event was logged.
Time
Time event was logged
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Figure 3-5 Alarm Details panel
Alarm-detail fields
Alarm
Name of the event.
Date/Time
Date and time the event was logged.
Duration
Time elapsed since event was logged.
Unit
Cooling unit to which the alarm applies.
Alarm Type
Number representing the event type.
• 1 = Warning
• 2 = Alarm
Threshold
Sensor-reading at which an event is triggered.
Value
The current value to which the threshold is compared.
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3.2.1
Silencing an audible alarm
Touch the screen to silence an audible alarm. If the alarm is non-latching, the alarm silences when the
condition clears.
NOTE
The audible alarm must be enabled in display options to sound. See 5.4 - Enabling the audible
alarm notification, page 60.
3.2.2
Acknowledging alarms
Depending on the notification settings, alarms and warnings must be acknowledged or reset. An event is
active as long as it is unacknowledged, with the exception of the network-failure events described in
Table 3-2. Once acknowledged, an event remains active until the situation that triggered the event is
resolved, see Table 3-1 on page 24, for event-status indicators. When an event acknowledged and
cleared, it is removed from the Alarms panel and the LED stops flashing red.
NOTE
Acknowledging alarm events does not clear them. To clear an issue, it must be corrected, reset
automatically by the controller, or reset manually.
1. On the ALARMS panel, touch Acknowledge All.
A check mark overlays the status indicator of the active alarms and warnings, and these automatically
clear when the condition is no longer present.
• If a critical event must be manually reset, the acknowledged items are listed with a Reset All button
on the ALARMS panel.
2. Touch Reset All to manually reset the condition.
Table 3-2
Events that clear without acknowledgment
Network Failure
Description
UNIT XX DISCONNECTED
The iCOM I/O board assigned as U2U address number XX (two up to thirty-two) has lost
communication with the group.
• Make sure all units are powered-on at the disconnect.
• Check cable connections and network settings where applicable.
NO CONNECTION W/UNIT 1
The iCOM I/O board assigned as U2U address number 1 has lost communication with the
group.
• Make sure all units are power on at the disconnect.
• Check cable connections and network settings where applicable.
BMS DISCONNECT
The BMS/BAS has not completed a handshake within the time defined by the BMS/BAS.
• Verify monitoring connections and communication to the BMS/BAS panel.
UNIT CODE MISSING
The factory unit code must be confirmed, saved and executed.
UNIT CODE MISMATCH
The factory unit code must be confirmed, saved and executed.
AMBIENT SENSOR FAILURE
The outdoor temperature / humidity sensor used on the air economizer unit has become
disconnected or is no longer working properly.
CAN GC 1 or 2 COMM ERR
See Table 5-3 - Events specific to Liebert MC Condenser on page 59.
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3.3 Viewing the event log for a cooling unit
The event log is a list by date/time of the last 400 events generated for the cooling unit by iCOM.
• On the User menu, touch Event Log.
The EVENT LOG for the cooling unit opens, Figure 3-6. Table 3-3 describes the color-coded status
for each event.
Table 3-3
Event status/type indicators
Indicator
Description
Green dot
Message.
Yellow dot
Unacknowledged warning event.
See 3.2.2 - Acknowledging alarms, page 26.
Red dot
Unacknowledged alarm event.
See 3.2.2 - Acknowledging alarms, page 26.
White dot
with check-mark overlay
Acknowledged event, the cause still exists.
White circle
Acknowledged event, the cause is cleared.
Figure 3-6 Event Log panel
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3.4 Viewing sensor data
The Sensor Data panel lists the standard and optional sensors monitored by iCOM and the current reading
of each sensor.
• On the User menu, touch Sensor Data.
The SENSOR DATA panel opens, Figure 3-7.
Figure 3-7 Sensor Data panel
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User Operation
3.5 Managing run hours for a component
You can view the run hours for components on a cooling unit, set the total-run-time limit, and reset total run
hours to zero.
1. On the User menu, touch Total Run Hours.
The RUN HOURS panel opens and the current hours for each component are listed in the Total Run
Hours column, Figure 3-8.
To reset the total run hours to zero, see 3.5.1 - Setting run hours to zero.
2. Use the slider to set the total-run-time limit for each component, then touch Save.
The limits are set.
• Touch Cancel to discard the changes.
NOTE
The Run Hours panel shown in Figure 3-8 may differ from your display because of customization
to your cooling-unit system.
Figure 3-8 Run Hours panel
3.5.1
Setting run hours to zero
1. On the RUN HOURS panel, touch to check each box in the Total Run Hours column next to the
component(s) to reset.
The Set to Zero button becomes available, Figure 3-8.
2. Touch Set to Zero.
The total run hours for selected component(s) is set to zero.
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3.6 Viewing remote-sensor readings
You can view a graphical display of the remote-sensor readings, edit the range that the graphs display,
remove and add sensors.
NOTE
The REMOTE SENSORS panel must be selected as content to view it. See 12.3.2 - Replacing
panel content, page 113.
Figure 3-9 Remote Sensors panel
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User Operation
3.6.1
Adjusting the range of remote-sensor graphs
You can adjust the range of the graph to more easily make comparisons of the temperature readings at
each rack. Typically, a range with the optimum temperatures at the middle make the graphs more useful.
1. On the REMOTE SENSORS panel, touch
, then touch Edit Range.
The Edit Graph Range dialog opens, Figure 3-10.
2. Touch the minimum or maximum value, use the keypad to enter a new temperature, and touch Go.
3. Touch Save.
The graph range is updated.
Figure 3-10 Edit Graph Range dialog
3.6.2
Removing/Adding sensors to the view
1. On the REMOTE SENSORS panel, touch
The panel-edit options display.
.
2. To remove a sensor graph, touch the X next to the graph.
The graph is removed.
– or –
To return all sensors to the view, touch Reset Layout.
3. Touch Save.
The panel is updated.
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3.7 Viewing teamwork, stand-by, cascade
and operating status for the cooling units
In a panel with “Status” content, the Teamwork Mode icon indicates the mode selected, Figure 3-11.
Figure 3-11 Teamwork icons
• Touch the Teamwork-mode icon.
The teamwork dialog opens displaying the teamwork mode, number of units in stand-by, and number
of operating units, Figure 3-12.
NOTE
You must be logged-in with the Service PIN to edit teamwork mode. See 1.3.1 - Powering-on
iCOM and Logging-in/Unlocking controls, page 5.
Figure 3-12 Teamwork dialog—User view
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Service Operation
4.0 Service Operation
4.1 Editing setpoints for the cooling unit
Setpoints are the means by which cooling-unit operation is controlled.
Figure 4-1 Setpoints panel
Setpoints options
Temperature Control
See 4.1.1 - Configuring Temperature setpoints, page 34.
High/Low Limit Control
See 4.1.2 - Configuring high/low-limit setpoints, page 36.
Humidity Control
See 4.1.3 - Configuring humidity setpoints, page 38.
Fan Control
See 4.1.4 - Configuring fan setpoints, page 39.
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4.1.1
Configuring Temperature setpoints
1. On the Service menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Temperature Control in the Options list.
The TEMPERATURE CONTROL secondary panel opens, Figure 4-2.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
NOTE
Proportional-band setting is dependent on the heat load and the components specific to your
cooling unit. Additional tuning may be required after start-up when using PI temperature control.
See 4.1.1.1 - Considerations when using PI temperature control, page 35.
Figure 4-2 Setpoints—Temperature Control panel
Temperature set-point options
Temperature Control Sensor
Selects sensor that controls cooling.
Temperature Setpoint Act
Read-only display of adjusted temperature setpoint when one of the following is active:
• Customer-input setpoint (remote-alarm device)
Temperature Setpoint
Temperature that the unit maintains via cooling.
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Temperature Control Type
Control when staging cooling and heating operations. Valid value:
• PI = percent of cooling/heating calculated using the temperature proportional band and temperatureintegration time settings. See 4.1.1.1 - Considerations when using PI temperature control, page
35.
Temperature Proportional Band
Adjusts the activation point of cooling components based on deviation from setpoint by placing half of the
selected value on each side of the temperature-control setpoint. A smaller number causes faster reaction
to temperature changes.
Note: Setting this too low causes short-cycling of compressors. See 2.4.5 - Short-cycle protection,
page 19.
Temperature Integration Time
Adjusts amount of cooling/heating based on the length of time the temperature has deviated from the
setpoint. The time selected is the amount of time it will take cooling capacity to reach 100%. For example,
if 3 minutes is selected, cooling capacity will increase to 100% in 3 minutes.
Note: 3 to 5 minutes of integration time is adequate for most applications. See 4.1.1.1 Considerations when using PI temperature control, page 35.
Temperature Deadband
Widens the setpoint to prevent small temperature changes from cycling compressors and valves
maximizing component life. When temperature is within the deadband, no change of the control output
(heating/cooling) occurs.
Temperature Setpoint 2
Alternate setpoint activated by customer input (remote-alarm device/RAD). When customer input
connection = 2nd Setpoint, this value becomes the active temperature setpoint.
4.1.1.1
Considerations when using PI temperature control
Several factors, such as room heat load, external heat gains, and component-specific performance can
affect the PI control loop. Adjusting the temperature proportional band and integration time can improve
cooling-unit performance and avoid problems detailed in Table 4-1.
Table 4-1
Problem
Cooling is slow to activate
PI temperature-control troubleshooting
Solution
• Decrease the proportional band slightly and monitor operation.
• Repeat until cooling-reaction time is acceptable.
• Increase the proportional band slightly, set the integration time
to 3 to 5 minutes, and monitor compressor run time.
Compressor short-cycle alarm
• Set the temperature deadband to 2.
Run time must be more than 3 minutes to prevent a short-cycle
of the compressor.
Excessive valve oscillation or hunting
• Increase the proportional band and/or increase integration time.
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4.1.2
Configuring high/low-limit setpoints
Setting dehumidification low limits avoids over-cooling a room during dehumidification. When a low limit is
reached, the cooling source used for dehumidification is disabled. Dehumidification resumes when air
temperature rises above the low-limit reset value.
NOTE
Dehumidification lock-out can occur with improper low-limit settings. To avoid lock-out:
• Increase heat load for efficient operation.
• Decrease low-limit settings slightly.
• Where applicable, decrease the reheat proportional band to allow reheat sooner.
1. On the Service menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch High/Low Limit Control in the Options list.
The HIGH/LOW LIMIT CONTROL secondary panel opens, Figure 4-3.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
Figure 4-3 Setpoints—High/Low Limit Control panel
High/Low-limit set-point options
Dehum Low Limit 1
Temperature at which dehumidification is interrupted.
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Dehum Low Limit Reset
Temperature value plus one-half the temperature deadband when dehumidification is permitted to
re-enable.
High Temp Limit Approach
Selects sensor used to increase the fan speed above the fan-speed setpoint STD to the Analog Out high
limit.
High Temp Limit Approach At
Sets the temperature differential below the high-supply and high-return temperature limit at which the fans
speed increase from the fan-speed setpoint STD to fan-speed MAX.
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4.1.3
Configuring humidity setpoints
1. On the Service menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Humidity Control in the Options list.
The HUMIDITY CONTROL secondary panel opens, Figure 4-4.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
Figure 4-4 Setpoints—Humidity Control panel
Humidity set-point options
Humidity Control Sensor
Selects sensor used when calculating relative humidity.
Humidity Setpoint
Humidity level by adding moisture to or removing moisture from the air.
Humidity Setpoint 2
Alternate setpoint activated by customer input (remote-alarm device/RAD). When customer input
connection = 2nd Setpoint, this value becomes the active humidity setpoint.
Humidity Control Type
Control when staging humidification operations. Valid value:
• PI = percent of humidification calculated using proportional and integral terms.
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Humidity Deadband
Widens the setpoint to prevent small changes in humidity from cycling components and maximizing
component life. When humidity is within the deadband, no change to control output
(humidification/dehumidification) occurs.
Humidity Proportional Band
Adjusts the activation point of humidifier/dehumidification components based on deviation from setpoint by
placing half of the selected value on each side of the humidity-control setpoint. A smaller number causes
faster reaction to humidity changes.
Humidity Integration Time
Adjusts unit capacity based on the length of time the humidity has deviated from the setpoint. Works in
conjunction with the proportional band to maintain tight setpoint control.
4.1.4
Configuring fan setpoints
Increased fan speed provides cooler air into the cooling unit, so compressors work less to cool the supply
air.
1. On the Service menu, touch Setpoints.
The SETPOINTS panel opens.
2. Touch Fan Control in the Options list.
The FAN CONTROL secondary panel opens, Figure 4-5.
3. Adjust the setpoint options, then touch Save.
The setpoint is updated.
• Touch Cancel to discard the changes.
Figure 4-5 Setpoints—Fan Control panel
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Fan set-point options
Fan Control Type
Selects the method of control for the fan motor.
• Manual = Air flow/fan speed is adjusted using a building-management system. See 2.3.1 - Manual
fan-speed control, page 15.
• Auto = Air flow/fan speed is adjusted using locally-installed temperature sensors. See 2.3.2 Automatic fan-speed control, page 16.
Fan Control Sensor
Sensor that controls fan speed when automatic fan-speed control is used.
Fan Regulation Type
• Type of control used to regulate the speed of the fan. PI = regulation is based on proportional and
integral terms. Provides best temperature control and helps avoid fan-speed oscillation.
Fan Delta
Fan temperature setpoint, it is the temperature difference compared to the cooling setpoint.
Fan Speed Proportional Band
Adjusts the fan speed based on the deviation from the setpoint. A smaller number causes faster reaction to
temperature changes.
Fan Speed Integration
Adjusts fan speed based on time away from the setpoint to maintain accurate temperature control.
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4.2 Scheduling Condenser and Cooling-unit tasks
The Scheduler configures operating conditions and modes for specific intervals. Tasks to schedule include:
• Condenser set-back—see 4.2.1 - Scheduling low-noise operation, page 41.
• Condenser fan-reversal—see 4.2.2 - Scheduling condenser-fan reversal, page 43.
Figure 4-6 Scheduler panel
4.2.1
Scheduling low-noise operation
Condenser setback schedules low-noise fan operation on units equipped with Liebert MC premiumefficient control. Fans spin more-slowly during specified times to reduce noise, and faster when low-noise
is unnecessary.
NOTE
Low-noise operation is overridden to prevent a high-pressure condition.
1. On the Service menu, touch Scheduler.
The SCHEDULER panel opens, Figure 4-6.
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2. Touch the Condenser Setback Schedule.
The TASK PROPERTIES panel opens, Figure 4-7.
3. Adjust the schedule settings, and touch Save.
The schedule is set up.
• Touch Cancel to discard the changes.
Figure 4-7 Scheduler—Condenser Setback Task Properties panel
Condenser Setback Task-properties options
Noise Reduction
Enable/Disable noise reduction. When checked, the schedule is run. When un-checked, the scheduling
parameters are ignored.
Disabled Day
Selects specific days on which noise-reduction operation is disabled when the schedule is enabled.
Whole Day
Selects whole days for which noise-reduction operation is available for the condenser fan.
Interval Day
Selects days on which noise-reduction operation for the interval specified in Interval 1.
Interval 1
Start and finish time of day that noise-reduction operates.
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Max Speed in Low Noise Mode
Sets the maximum speed for the condenser fan during low-noise operation.
Max Speed in Normal Mode
Sets the maximum speed for the condenser fan during normal or high-efficiency operation.
Status
Indicates if low-noise operation is active or inactive.
4.2.2
Scheduling condenser-fan reversal
Condenser-fan reversal schedules a reversal of the condenser fans, reversing air flow to help remove dust,
paper, leaves and such from the suction side of the condenser coil.
1. On the Service menu, touch Scheduler.
The SCHEDULER panel opens, Figure 4-6.
2. Touch the Condenser Fan Reversal Schedule.
The TASK PROPERTIES panel opens, Figure 4-8.
3. Adjust the schedule settings, and touch Save.
The schedule is set up.
• Touch Cancel to discard the changes.
Figure 4-8 Scheduler—Condenser Fan Reversal Task Properties panel
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Condenser Fan-reversal Task-properties panel
Reverse Fans Every
Selects number of days between fan reversal.
Reverse Fans At Duration
Length of time, in seconds, the fans are reversed.
Reverse Fans Now
Enables/Disables immediate fan reversal.
4.3 Setting general cooling-unit options
Sets up general options including the following:
• Fan
• Compressor
• Reheat
• Humidifier
• Dehumidification
• Water-leak detector
Figure 4-9 Options Setup panel
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4.3.1
Setting miscellaneous options
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Misc Settings.
The MISC SETTINGS panel displays, Figure 4-10.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-10 Misc Settings panel
Miscellaneous cooling-unit settings
Auto Restart Enable
When enabled, the cooling unit returns to the status at which it was operating when input power returns
after a power failure. (“On” if it was powered-on and “Off” if it was powered-off before the failure.)
Single Unit Auto Restart
Selects time elapsed (in seconds) before unit restarts when Auto Restart Enable is enabled.
Warning Activates Alarm Relay
When enabled, a warning event activates the alarm relay.
K11 (WA Relay) and AL Relay
Sets action of the alarm and warning relays.
• Direct = Open when power is applied to the control.
• Reverse = Closed when power is applied to the control.
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EEV Alarmboard
Sets the events sent to the alarm board as:
• NC = normally closed
• NO = normally open
Display Off Enabled
On this cooling unit, sets whether or not the unit powers on/off when the on/off button on the iCOM display
is used.
• No = on/off requests via the display are ignored.
• Yes = unit powers on/off when requested via the display.
Restart @ BMS Off and Disconnected
Selects cooling unit’s response/action when BMS is disconnected.
• No = unit remains in a monitoring-off state.
• Yes = unit may power-on from a monitoring-off state.
4.3.2
Setting fan options
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Fan Settings.
The FAN SETTINGS panel displays, Figure 4-11.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-11 Fan Settings panel
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Fan settings
Minimum Fanspeed
Minimum speed at which the fan will operate.
Maximum Fanspeed
Maximum speed at which the fan will operate.
Dehumidification Fanspeed
Maximum fan speed when dehumidification is in progress, assisting with the dehumidification process.
Fanspeed Filter at 0%
Decreases the rate at which the fan speed changes when close-to or at the temperature setpoint to avoid
undershooting the setpoint.
Fanspeed Filter at 100%
Increases the rate at which the fan speed changes for a quicker reaction of fan speed at high
temperatures.
Fanspeed Reposition Delay
Length of time before fan speed can decrease, allowing temperature to stabilize before the change occurs.
MIN at CFC for EC Fan
Cooling deviation at which the fan will operate at minimum speed.
STD at CFC for EC Fan
Cooling deviation at which the fan will operate at maximum speed.
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4.3.3
Setting compressor options
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Compressor Settings.
The COMPRESSOR SETTINGS panel displays, Figure 4-12.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-12 Compressor Settings panel
Compressor settings
Winter Start Delay
Length of time, in minutes, that a low-pressure condition is ignored during compressor start-up. See
4.3.3.1 - Setting Low-pressure Time Delay, page 49.
Capacity Change at 0%
Decreases the rate at which cooling capacity changes when close-to or at the temperature setpoint to
avoid undershooting the setpoint.
Capacity Change at 100%
Increases the rate at which the cooling capacity changes for a quicker reaction of cooling at high
temperatures.
Ball Valve Setpoint Offset
Adjusts sensitivity to compressor discharge pressure or liquid pressure by increasing sensitivity. The
higher the added pressure, the more the valve opens.
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4.3.3.1
Setting Low-pressure Time Delay
At compressor start-up, a low-pressure condition is ignored for a set period to avoid false trips due to
bubbles in the refrigerant or other misreading of the low-pressure device.
NOTE
The default setting is a 3-minute delay for air-cooled units and a 0- to 1-minute delay for watercooled units.
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Compressor Settings.
3. Use the Winter Start Delay slider to select the number of minutes for the delay, and touch Save.
4.3.3.2
Adjusting Ball-valve Pressure Offset
NOTE
Only a properly-trained and qualified technician should modify the motorized ball valve setting.
The number of times the valve opens and closes is adjusted based on added pressure offset.
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Compressor Settings.
3. Use the Ball Valve Setpoint Offset slider to select amount of pressure added to open the valve wider,
and touch Save.
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4.3.4
Setting Reheat options
If the room air temperature becomes too cold, heating is activated based on the temperature-proportionalband setting. Depending on the type of cooling unit, there are different types of reheat (configured at
purchase/set at factory). There may also be 1 to 3 stages of reheat, which is also factory set. The only
service operation available is setting the number of heat stages.
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Reheat Settings.
The REHEAT SETTINGS panel displays, Figure 4-13.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-13 Reheat Settings panel
Reheat settings
No. of Electrical Heat Stages
Number of electric stages that may be activated during reheat.
Note: Depending on your cooling unit, the maximum setting may be 1, 2, or 3.
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4.3.5
Setting Humidifier options
The type of humidifier used depends on the cooling-unit model and application requirements for your
system.
NOTE
Except for externally-mounted humidifiers, humidifier operation is limited by the return-air
temperature. If return-air temperature reaches 80°F (26°C) or higher, the humidifier is disabled.
The humidifier will not resume operation until the temperature falls to 75°F (24°C) or remains
below 80°F (26°C) for 20 minutes.
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Humidifier Settings.
The HUMIDFIER SETTINGS panel displays, Figure 4-14.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-14 Humidifier Settings panel
Humidifier settings
Humidification Enabled
Enables/Disables humidification.
Humidifier Model
The type of humidifier installed. CRV uses a steam-generating canister for humidification, selection is
SGH.
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4.3.6
Setting Dehumidification options
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Dehumidification Settings.
The DEHUMIDIFICATION SETTINGS panel displays, Figure 4-15.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-15 Dehumidification Settings panel
Dehumidification settings
Dehumidification Enabled
Enables/Disables whether or not the compressor/valve is used for dehumidification when humidity is
above the setpoint.
Capacity Increase on Dehum
Capacity increase permitted during dehumidification.
Dehum Timer
Length of time, in minutes, the dehumidifier may operate.
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4.3.7
Setting water-leak detector options
1. On the Service menu, touch Options Setup.
The OPTIONS SETUP panel opens.
2. In the category column, touch Water Leak Detector.
The WATER LEAKAGE DETECTOR panel displays, Figure 4-16.
3. Make adjustments as needed and click Save.
The option settings are updated.
• Touch Cancel to discard the changes without saving.
Figure 4-16 Water Leakage Detector panel
Water-leak detector settings
Water Detector
Type of water-leak detector installed.
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Managing Events: Alarms, Warnings and Messages
5.0 Managing Events:
Alarms, Warnings and Messages
Events are notifications of operating status for the cooling unit, its components, and auxiliary devices. All
events are recorded in the Event Log, and alarm and warning events are also displayed on the Alarms
panel (See 3.3 - Viewing the event log for a cooling unit, page 27, and 3.2 - Viewing cooling-unit
alarms, page 24.)
In some cases, depending on configuration, an alarm event may power-off the cooling unit, but not always.
However, if a stand-by unit is configured, all alarm events stop the faulty unit and start the stand-by unit.
Message and warning events do not. See 7.0 - Teamwork, Stand-by and Rotation for Cooling Units,
page 69.
5.1 Event properties
The ALARMS & EVENTS panel, Figure 5-1, lists all events available on the system. You can view and
modify events and the criteria that trigger visual/audible alarms including:
• Critical thresholds
• Time delays
• Enable/Disable
• Event type
• Adding custom events
NOTE
Not all event properties may be adjusted, depending on the criticality of the event,
which is factory-set.
Figure 5-1 Alarms & Events panel
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Alarms & Events panel fields
Property
Lists groups of events, expanding displays the events in each group. See 5.2 - Enabling events and
editing event settings
Typ
Event type. See 5.3 - Selecting event type and setting alarm/warning notification.
Ack.
Indicates type of acknowledgment required. See 3.2.2 - Acknowledging alarms, page 26.
• Auto = the alarm is acknowledged automatically. It goes away if the situation that triggered alarm event
is no longer true.
• Manual = the alarm goes away only when acknowledged, even if the situation that triggered the alarm
event is resolved/no longer true.
Reset
Indicates type of reset required for the event:
• Auto = the alarm resets automatically after acknowledgment.
• Manual = the alarm must be reset manually after acknowledgment. See 3.2.2 - Acknowledging
alarms, page 26.
5.2 Enabling events and editing event settings
In the ALARMS & EVENTS panel, events are grouped into categories for easier management, for
example, the factory-set remote-sensor alarms and humidification/dehumidification events. In some cases,
touch the group heading provides edit options for the entire group, like thresholds, delays and
enable/disable. Each event includes settings specific for that event and the notification option where eventtype and alarm notifications are selected (See 5.3 - Selecting event type and setting alarm/warning
notification, page 57).
1. On the Service menu, touch Alarm/Event Setup.
The ALARMS & EVENTS panel opens.
2. Scroll or search to find the event, touch the set’s heading to display the properties and values for the
entire set in the EDIT panel.
– or –
Touch an individual alarm or event to display it’s specific values in the EDIT panel.
NOTE
To edit the event type and notification, see 5.3 - Selecting event type and setting alarm/warning
notification.
3. Use the EDIT panel to adjust the settings for the selected event or group of events.
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5.3 Selecting event type and setting alarm/warning notification
Setting notification delays and disabling visual notification prevents nuisance notifications. Customize to
notify of critical events on your cooling system.
NOTE
If the event includes a safety function, such as high pressure, low pressure, main fan overload,
etc., the safety function executes regardless of event type or notification setting. However,
notification timing delays still apply.
Table 5-2 lists the events for the CRV. Table 5-3 describes events for specific components.
1. On the Service menu, touch Alarm/Event Setup.
2. Scroll or search to find the event and touch the alarm or event.
3. On the EDIT panel, touch Notifications.
The EDIT panel displays the notification properties, Figure 5-2.
4. Adjust the notification properties described in Notification Properties list, then touch Save.
The notification is updated.
• Touch Cancel to discard the changes without saving.
Figure 5-2 Edit panel for notification properties
Notification Properties
Enable
Enables/Disables notification. Touch the switch to set On or Off.
Note: When disabled, events are not logged or displayed and visual/audible alarm notifications are not
made.
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Delay
Time, in seconds, to delay notification after event trigger. Depending on the event, the delay may or may
not be adjusted.
• If the notification delay for the event is greater than the delay set for the event group, the group’s delay
includes the event’s delay.
Type
Logging and notification level of the event. Table 5-1 describes the event type and notification it generates.
Table 5-1
Notification types
Type
Description
Message
Stored in event log only. No visual or audible notification.
Warning
Listed with a yellow status dot on the ALARMS panel and the LED flashes.
See Table 11-1 - Cooling-unit LED colors and state meanings, page 97, and 3.2 - Viewing
cooling-unit alarms, page 24
Alarm
Listed with a red status dot on the ALARMS panel, the LED flashes, and the audible alarm sounds.
See Table 11-1 - Cooling-unit LED colors and state meanings, page 97, Section 3.2 - Viewing
cooling-unit alarms, page 24, and Section 5.4 - Enabling the audible alarm notification.
Table 5-3 describes events available with a Liebert CRVTM.
Table 5-2
BMS Disconnected
Bottom Fan Failure
Call Service
Clogged Filters
Comp 1 High Pressure
Comp 1 Hrs Exceeded
Comp 1 Low Pressure
Comp 1 Pumpdown Fail
Comp 1 Short Cycle
Comp Power Reduction
Compressor(S) Lockout
Cond Pump-High Water
Condenser 1 Failure
Control Valve Failure
Customer Input 1
Customer Input 2
Customer Input 3
Customer Input 4
Dehum Disabled
Dehum Disabled 12hrs
Dehum Enabled
Dehum Hrs Exceeded
Dig Scroll1 High Temp
Dscroll 1 Sensor Fail
El Heat1 Hrs Exceeded
Fire Alarm
Fluid Sensor Failure
General Alarm
HCB Not Connected
Heat Rej SPD
Heat Rej VFD
Liebert® iCOM® User Manual
Events supported by Liebert CRV
Heaters Overheated
High CW Temp
High Return Humidity
High Return Temperature
High Supply Temperature
High Temperature
Hp Transducer 1 Fail
Hum Disabled
Hum Enabled
Hum Hrs Exceeded
Humidifier Cylinder Worn
Humidifier High Amps
Humidifier Lockout
Humidifier Low Amps
Humidifier Low Water
Humidifier Problem
Loss of Airflow
Loss of CW Flow
Loss of Flow
Loss of Power
Low Memory 1
Low Return Humidity
Low Supply Temperature
LP Transducer 1 Fail
Lwd Sensor Fail
Maintenance Done
Maintenance to be Done!
Network Failure
No Connection w/Unit1
No Power
On-Off Key Disabled
Power Off
Power On
Rack Sensor 1 Failure
Rack Sensor 10 Failure
Rack Sensor 2 Failure
Rack Sensor 3 Failure
Rack Sensor 4 Failure
Rack Sensor 5 Failure
Rack Sensor 6 Failure
Rack Sensor 7 Failure
Rack Sensor 8 Failure
Rack Sensor 9 Failure
RAM / Battery Fail
Reheat Lockout
Room Humidity Problem
Room Sensor Failure
Smoke Detected
Standby Mode
Supply Sensor Failure
System Off Confirmed
System Off Requested
Top Fan Failure
Unit 01 Disconnected
Unit 02 Disconnected
Unit 03 Disconnected
Unit 04 Disconnected
Unit 05 Disconnected
Unit 06 Disconnected
Unit 07 Disconnected
Unit 08 Disconnected
Unit 09 Disconnected
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Unit 10 Disconnected
Unit 11 Disconnected
Unit 12 Disconnected
Unit 13 Disconnected
Unit 14 Disconnected
Unit 15 Disconnected
Unit 16 Disconnected
Unit 17 Disconnected
Unit 18 Disconnected
Unit 19 Disconnected
Unit 20 Disconnected
Unit 21 Disconnected
Unit 22 Disconnected
Unit 23 Disconnected
Unit 24 Disconnected
Unit 25 Disconnected
Unit 26 Disconnected
Unit 27 Disconnected
Unit 28 Disconnected
Unit 29 Disconnected
Unit 30 Disconnected
Unit 31 Disconnected
Unit 32 Disconnected
Unit Code Missing
Unit Disabled
Unit Hrs Exceeded
Unit Off
Unit On
Unit Shut Down
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Managing Events: Alarms, Warnings and Messages
Table 5-3 describes events available with a Liebert MCTM Condenser.
NOTE
A CANbus connection between the Liebert MC and iCOM to trigger these events.
Table 5-3
Events specific to Liebert MC Condenser
Event
Description
CAN GC 1 or 2
The Liebert iCOM board cannot establish communication with the
Liebert MC board for 10 seconds consecutively.
• Alarm notification displayed for the corresponding circuit.
• EconoPhase pump operation disabled for the circuit affected.
• When iCOM re-establishes communication with the Liebert MC
board, the event is reset.
GC 1 or 2 Rem Shutdown
Remote shut-down requested.
• Compressor(s) and EconoPhase pump(s) in the corresponding
circuit are powered-off.
• If event occurs on the lead circuit, then the lead-lag order of the
compressors/tandem banks changes.
• When the Liebert MC remote-shutdown circuit returns to inactive
state (closed), the event is reset and the compressors in that circuit
may be powered-on.
• Normal compressor lead-lag sequence resumes when both
compressors are Off.
GC 1 or 2 Board Fail
An unrecoverable failure of the Liebert MC control board has
occurred causing a condenser shutdown.
GC Pres Sens Fail C1 or C2
Condenser pressure-sensor failure
GC High Cond Press C1 or C2
High condensing pressure
GC Low Cond Press C1 or C2
Low condensing pressure
GC 1 or 2 Amb Sens Fail
Ambient-temperature-sensor failure
GC 1 or 2 Amb Temp Limit
High/low ambient temperature
GC Temp Sens Fail C1 or C2
Refrigerant-liquid-line temperature-sensor failure
GC High Cond Temp C1 or C2
High refrigerant-liquid-line temperature
GC Low Cond Temp C1 or C2
Low refrigerant-liquid-line temperature
The following events may result from a fan-failure alarm. Refer to the
specific fan manufacturer’s literature for troubleshooting information.
• VSD high link current
• VSD drive error
• VSD earth to ground fault
• VSD electronics heat sink thermal overload
• VSD hall failure
• VSD IGBT failure
GC 1 or 2 Fan 1 through 4 FAIL • VSD line fault
• VSD motor locked
• VSD motor thermal overload
• VSD phase failure
• VSD-specific uncategorized alarm detected
• VSD electronics high-temperature condition
• VSD high link voltage
• VSD low link voltage
• RS-485 communications failure
GC 1 or 2 TVSS Failure
TVSS alarm
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5.4 Enabling the audible alarm notification
1. On the User menu, touch Display Options > Display Properties.
The UNIT DISPLAY panel opens.
2. Touch the Alarm Buzzer Pattern value, and select a pattern from the drop-down list.
• Selecting None disables the audible notification.
3. Touch Save to save the property settings.
• Touch Cancel to discard changes.
5.5 Remote-alarm device and Customer-input events
Remote-alarm devices are various sensors and detectors outside the cooling unit that provide information
about conditions and situations that may affect operation. RAD include smoke detectors, filter-condition,
valve status.
Included in the remote-alarm devices (RAD) are up to 4 customer-input events depending on cooling-unit
configuration. In some cases, 2 additional, optional customer-input events are available. See XREF
SETUPCUSTOMINPUTS.
RAD and customer-input notifications are set in the same was as other events. See 5.3 - Selecting event
type and setting alarm/warning notification, page 57.
5.5.1
Setting-up customer-input events
Input devices must be wired to Terminal 24 through a dry contact to locations 50, 51, 55 and 56 for alarms
1 through 4 respectively (For the terminal location, refer to the cooling-unit electrical schematic and
installation manual).
1. On the Service menu, touch Alarm/Event Setup > Remote Alarm Device Input.
The EDIT panel opens, Figure 5-3.
2. In Customer Input X, select the input type that best describes the wired device/input, see Table 5-4.
3. In Customer Input X Active When, select whether the input is active (triggers events) when Opened or
Closed.
4. Once input(s) are set, touch Save.
The customer-input settings are saved.
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Figure 5-3 Customer-input set-up on the RAD-input Edit panel
Customer-input options
Customer Input X
Selects the customer-wired input. See Table 5-4 for a description of available values.
Customer Input X Active When
Selects when the input triggers an event. Options are:
• Opened = events are triggered when the signal is open.
• Closed = events are triggered when the signal is closed.
NOTE
Depending on customization, some events listed in Table 5-4 may not be available with your
system.
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Table 5-4
Customer-input Options
Input
Action/Description
Smoke
Event only.
Flow Alarm
Event only.
C-Input 1
Event only.
C-Input 2
Event only.
C-Input 3
Event only.
C-Input 4
Event only.
Rht Lockout
Event + Electric heaters disabled.
Hum Lockout
Event + Humidifier disabled.
Rht+Hum Lock
Event + Electric heaters and humidifier disabled.
Comp Lockout
Event + Compressor(s) disabled w/o pump down.
Call Service
Event only.
High Temp
Event only.
HTRJ VFD
Activates the HEAT REJ VFD ALARM. No other function.
HTRJ SPD
Activates the HEAT REJ SPD ALARM. No other function.
FIRE ALARM
Event + Shuts-down the unit.
2ND SETPOINT
No event, but switches to the second setpoint.
COND 1 FAIL
Event only.
HUM
Event +
For internal humidifier: a.) stops filling when the bottle is full.
b.) activates the HUMIDIFIER CYLINDER WORN event,
and locks-out humidifier when input is active for 24 hours
and steam remains below 50%.
For external humidifier: activates the HUMIDIFIER
PROBLEM event and locks-out the humidifier.
C PMP Alarm A
Event + Activates COND PUMP-HIGH WATER event only.
C PMP Alarm L
Event + Activates COND PUMP-HIGH WATER event and
locks-out the humidifier.
C PMP Alarm SD
Event + Activates COND PUMP-HIGH WATER event and
shuts-down the cooling unit.
POWER A
Event only.
POWER B
Event only.
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U2U Networking
6.0 U2U Networking
iCOM-controlled cooling units connected in an Ethernet unit-to-unit (U2U) network are able to efficiently
cool and control humidity in the conditioned space by exchanging data in several modes of operation.
U2U networking is required to set up and control the following operating features:
• Teamwork
• Stand-by (lead/lag)
• Rotation
• Cascading
6.1 Preparing for U2U Group Set-up
Cooling units in the network will be assigned to groups, which affects how units function in teamwork,
stand-by, rotation, and cascading operations. Especially in large rooms, it is important to consider the
several factors before setting-up groups to balance cooling-unit operation with room conditions.
1. Make a map of the room and indicate the location of all heat-generating devices and cooling units to
plan for proper heat-load management and cooling-air distribution.
2. Determine the number of units to network together to ensure proper air flow and environmental control,
up to 32 units.
3. Determine number of stand-by units.
4. Determine if using teamwork and if so, which mode.
5. Plan U2U address assignments.
• Refer to U2U Display and Control-board settings list for guidelines assigning cooling-unit
control-board addresses and iCOM display-board addresses.
• Balance/Alternate unit address assignments based on room layout and because stand-by and
teamwork operate in numeric order by unit number. Figure 6-1 shows an example layout
assignment with half of the cooling units in stand-by and half operating. Without a plan, adjacent
units could be operating or inactive, which may not provide proper heat-load balance or efficient
use of cooling capacity.
6. Read and record all programmed settings for each of the individual units (see 10.3.1 - Backing-up
settings, page 91).
7. Verify that network cabling and switches are provided, ready to connect, and labeled by-unit at the
network switch.
NOTE
Cooling units are factory-wired for stand-alone operation. Do not connect the U2U network cabling
before setting the U2U network configuration/groups. Network communication conflicts and
unreliable display readings will result.
Configure the network using 6.2 - Configuring U2U network settings, then refer to 13.2.3 - U2U
Wiring connection, page 131, to connect the network cabling and hardware.
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Figure 6-1 Example layout stand-by/operating unit-address assignment
6.2 Configuring U2U network settings
The U2U NETWORK SETTINGS configure iCOM’s unit-to-unit communication
and includes information buttons,
, that display pop-up field descriptions. The panel also indicates
issues with the network settings for resolution, see 6.2.1 - Addressing network-settings issues, page
66.
1. On the Service menu, touch BMS & Teamwork Setup > U2U Setup.
The U2U NETWORK SETTINGS panel opens, Figure 6-2.
2. Touch the field to edit.
The keypad opens.
3. Type the entry and touch Go.
4. When all fields to edit are updated, touch Save & Restart.
NOTE
Depending on the changes made, the Save button updates to indicate the components that need
rebooted or restarted.
If the control board reboots, the cooling unit suspends operation for 60 seconds, then resumes
operating.
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Figure 6-2 U2U Network Settings panel
U2U Display and Control-board settings
IP Address
Network address of the display and control board.
Note: Last 3 digits must be a unique value and need not be sequential. However, Emerson
recommends that they match the U2U address for easier reference later.
Netmask
Divides IP addresses in subnet and specifies network available to hosts for the display and control board.
Display and control-board Netmask must be identical on the U2U network.
Gateway
Routes data and acts as proxy server/firewall during for display and control board during network set-up.
Display and control-board must be identical on the U2U network.
Broadcast
Logical address at which connected displays receive datagrams.
Note: Messages sent to the broadcast address is typically received by all network-attached hosts.
MAC Address
Unique, read-only identifier of the display or control-board Ethernet device.
U2U Group
For the display, select the zone/group to which the unit belongs.
For the control board, selects the zone/group with which the unit will be configured in
teamwork/stand-by/rotation scenarios.
Note: Units with a specific thermal area of influence should be assigned to the same zone/group,
typically when a network spans separate rooms rather than by aisles. Groups are also handy
when cooling units vary by cooling type, compressor type, or version of iCOM firmware and
otherwise do not operate together efficiently or at all.
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U2U Address
For the display, a unique identifier for each display on the U2U network. Address range is 33 to 64.
For the control board, a unique identifier for each control board on the U2U network. Address range is
1 to 32 and must be consecutive from the previous control-board address in the U2U group.
Note: For both board and display, Emerson recommends matching the U2U address to the last 3 digits
of the IP address for easier reference later.
U2U Target Address
The address of the control board targeted by the display.
Note: The unit’s U2U target address must match the control-board U2U address.
CB Firmware Version
Firmware version of the control board.
Generate U2U Compatible Broadcast
Facilitates U2U communication between the display and control board.
Note: Do not un-check. Failure to generate the compatible broadcast address results in loss of
communication between the display and control board.
6.2.1
Addressing network-settings issues
At the bottom of the U2U NETWORK SETTINGS panel, an Issues button indicates whether or not there
are problems with the network settings, Figure 6-3. The button indicates the number of issues and also
changes color when a problem exists, Table 6-1.
Table 6-1
Issues button status colors
Color
Description
Green
No problems. Number of issues is zero.
Red
Problem(s) detected. Number of issues displayed.
Figure 6-3 Network settings Issue(s) button
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U2U Networking
1. When an issue is indicated, touch the Issues(s) button on the U2U NETWORK SETTINGS panel.
The ISSUES dialog opens, Figure 6-4.
Figure 6-4 Network ISSUES dialog
2. Note the problems and Close the dialog, the address the issue:
• Touch the setting to correct.
The on-screen keyboard opens.
• Make adjustments and click Go.
• Continue making corrections until no problems are indicated.
3. Verify that unit-to-unit communication is established, then touch Save.
NOTE
Depending on the changes made, the Save button updates to indicate the components that need
rebooted or restarted.
If the control board reboots, the cooling unit suspends operation for 60 seconds, then resumes
operating.
6.2.2
Modifying unit-to-unit network settings
1. On the Service menu, touch BMS & Teamwork Setup > U2U Setup.
The U2U NETWORK SETTINGS panel opens, Figure 6-2.
2. Touch the setting to edit and use the on-screen keyboard to make adjustments, then click Go.
3. Verify that unit-to-unit communication is established, then touch Save.
NOTE
Depending on the changes made, the Save button updates to indicate the components that need
rebooted or restarted.
If the control board reboots, the cooling unit suspends operation for 60 seconds, then resumes
operating.
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Teamwork, Stand-by and Rotation for Cooling Units
7.0 Teamwork, Stand-by and
Rotation for Cooling Units
iCOM Unit-to-unit (U2U) communication via private network and additional hardware (see 6.0 - U2U
Networking, page 63) allows the following operating features for the cooling units:
• Teamwork
• Stand-by (Rotation)
• Cascade
7.1 Teamwork Modes
When iCOM-controlled cooling units are connected to a network in a group or “team,” use teamwork to
optimize performance and efficiency depending on the mode chose and its application.
In a panel with “Status” content, the Teamwork Mode icon indicates the mode selected, Figure 7-1.
Touching the icon displays the Teamwork dialog, Figure 7-2, from which you can access the teamworkcontrol settings.
1. Touch the Teamwork-mode icon, then touch Edit on the teamwork dialog.
– or –
On the Service menu, touch BMS & Teamwork Setup > Teamwork / Standby.
The TEAMWORK/STANDBY panel opens, Figure 7-3.
2. In the Options list, touch Teamwork Mode, and select the mode from the Teamwork Mode drop down
in the TEAMWORK MODE CONTROL panel, Figure 7-4.
3. Touch Save.
Teamwork mode is set.
• Touch Cancel to discard changes.
Figure 7-1 Teamwork icons
Figure 7-2 Teamwork dialog—Service view
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Figure 7-3 Teamwork/Standby panel
Figure 7-4 Teamwork Mode Control panel
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Teamwork Control options
Number of Connected Units
Number of units connected in the group if U2U networked.
Teamwork Mode
Teamwork mode to use for the group.
Teamwork is based on
Select the way the sensor readings from each cooling-unit in the group are used to control temperature
and humidity. Options are:
• Maximum = based on the highest reading from a sensor in the group.
• Average = based on the average readings from the sensors in the group.
Cascade Units
Stages-on stand-by units based on room temperature/humidity load. Available in Teamwork modes 1 and
3, the options differ for each:
• Teamwork mode 1 - Parallel options are:
• Cooling = stand-by units cascade-on with a call for cooling only.
• Teamwork mode 3 - Optimized Aisle options are:
• Fan PI = stand-by units cascade-on based on the inability of active units to reach setpoint
temperature while operating at full capacity.
• Fanspeed = stand-by units cascade-on based on the inability of active units to reach setpoint
temperature while operating at full fan speed.
Cascaded Units Delay
Length of time in minutes to delay the activation of a stand-by unit after the previously-activated unit starts,
to prevent staged-cascaded units from starting too close together or at the same time.
Cascaded Units Quick Start
After a power cycle of the master unit, identical to Cascaded Units Delay except that it should be shorter to
get units to start more-quickly after a power cycle.
Note: This delay remains in effect until all cascaded units have been restarted, then the delay reverts to
setting of Cascaded Units Delay.
Cascaded Units Off Delay
Length of time, in minutes, to delay powering-off a cascaded unit after fan speed drops below the
Stop Next Unit @ SYS Fanspeed setting.
Cascaded Units Min Run
Length of time in minutes that an cascade-on unit must run before powering-off.
Start Next Unit @ SYS Fanspeed
Fan speed at which the next cascaded unit is powered-on.
Max. Intermediate System Speed
Limits the fan speed of the group until all units in cascade are powered-on. Once all units are operating,
the fan speed may increase beyond this setting.
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Stop Next Unit @ SYS Fanspeed
Fan speed at which the next cascaded unit is powered-off. Unit power-off may be delayed by Cascaded
Units Off Delay.
7.1.1
No Teamwork—multiple zones in one room
When a teamwork mode is not used, cooling units work independently based on their own sensors.
Stand-by and unit rotation may be used, but cascading cannot.
7.1.2
Teamwork Mode 1—parallel operation
Teamwork mode 1 is best for small rooms with balanced heat loads. A master unit collects the controlling
readings for temperature and humidity from all the operating (fan “on”) units in the group, then determines
the average or worst-case reading, and sends operating instructions to efficiently distribute cooling
capacity across available units.
In Teamwork mode 1, most parameters are shared and, when set in any unit, are set in all units in the
group.
7.1.3
Teamwork Mode 2—independent operation
Teamwork mode 2 works well for most applications, and best in large rooms with un-balanced heat loads
by preventing units in a group from operating in opposing modes, some cooling and some heating. All
temperature and humidity parameters are shared by the group. The master unit monitors all available unitsensor readings and determines the demand for cooling, heating, humidification and dehumidification,
then sends operating instructions to address the greatest demand.
In Teamwork mode 2, the setpoints for all units must be identical. The proportional band, deadband, and
related settings may differ by unit. Fan speed is modulated per unit. Rotation and cascading is not
available, so expect un-even distribution of work hours.
7.1.4
Teamwork Mode3—optimized-aisle operation
Teamwork mode 3 takes advantage of variable-speed fan options and variable-capacity component
options to maintain rooms with an un-balanced load and to prevent units in a group from operating in
opposing modes. All units operate in the same mode based on the average or worst-case (maximum)
readings from the unit sensors. A local control (cooling-capacity supply sensor) provides input to manage
and maintain the discharge-air temperature at each unit. In addition, fan speed and operation are
controlled based on readings from the unit sensors to air delivery to the cold aisle.
7.1.4.1
Setting-up Teamwork mode 3
Teamwork mode 3 requires the following:
• iCOM connection to a U2U network.
• Variable-capacity compressors in the cooling unit.
• Variable-speed fans in the cooling unit.
• Supply-control air-temperature sensors.
In addition, specific settings for wired-remote (rack) sensors and setpoints are needed as described in the
following steps.
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Teamwork, Stand-by and Rotation for Cooling Units
1. Set wired-remote sensor function and mode:
• On the Service menu, touch Auxiliary Device Setup > Sensors > Wired Remote Sensors.
• Touch each sensor name, and select Control or Reference in Function based on rack set-up or
preference, then touch Save.
• On the SENSORS panel, touch Setup under Wired Remote Sensors, and select Maximum or
Average in Unit Remote Sensors Mode, then touch Save.
See 9.2 - Wired Remote Sensors, page 82, for descriptions of all the wired-remote sensor
settings.
2. At each unit in the group:
• On the Service menu, touch Setpoints > Temperature Control.
• In Temperature Control Sensor, select Supply Sensor, then touch Save.
• In Temperature Setpoint, select the setpoint based on the cooling unit’s area of influence, then
touch Save.
3. At the master unit:
• On the Service menu, touch Setpoints > Fan Control.
• In Fan Control Sensor, select Remote Sensor, then touch Save.
The other units in the group are set automatically.
• On the Service menu, touch BMS & Teamwork Setup > Teamwork / Standby > Teamwork Mode.
• In Teamwork Mode, select 3 Optimized Aisle.
• In Teamwork is based on, select Maximum or Average, then touch Save.
Teamwork mode 3 is set.
4. Monitor operation of the cooling units and adjust setpoints and control bands as necessary.
7.2 Assigning Cooling Units to Stand-by (Lead/Lag)
Stand-by assigns some units to operate while others are “on stand-by” which is idle but ready become
active in the event of an alarm condition in one of the operating units or based on a rotation schedule.
When a unit is in stand-by mode, fan(s) are off and no cooling occurs. In multiple cooling-unit systems,
assigning units to stand-by lets you:
• Configure redundancy in case of failure scenarios.
• Manage cooling-unit run time. See 7.3 - Setting a Rotation Schedule, page 75.
• Modulate for very low loads to full-design load by cascading activation of stand-by units (configured
when setting-up teamwork mode).
The U2U network has built-in fail-over conditions that are automatically employed when stand-by units
have been assigned:
• Single cooling-unit or component failure, a stand-by unit is activated to replaced the failed unit.
• Alarm event causes unit shut-down, a stand-by unit is activated. If the activated unit also has an alarm
event, the next available stand-by unit is activated. If all units have an alarm event, and no more standby units are available, a unit with a non-critical alarm event will be activated.
NOTE
Redundancy is employed if units are assigned to stand-by regardless of the teamwork mode
selected, including “no teamwork.”
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1. On the Service menu, touch BMS & Teamwork Setup > Teamwork / Standby.
The TEAMWORK/STANDBY panel opens.
2. Touch Standby.
The STANDBY CONTROL panel displays, Figure 7-5.
3. Adjust the settings, then touch Save.
• Touch Cancel to discard the changes.
Figure 7-5 Standby Control panel
Stand-by options
Start All Standby Units by High Temperature
When Yes, all units are activated to cool when a high-temperature alarm occurs.
High Temperature Threshold
Temperature at which all stand-by units are activated.
Number of Standby Units
Number of units in stand-by mode.
Standby Fan Timer at Reheat/Humidification
Length of time in minutes that the fan continues to operate after the cooling unit enters stand-by mode if
reheat or the humidifier were operating when unit powered-off.
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7.3 Setting a Rotation Schedule
You can set a rotation schedule to switch operating and stand-by units to manage run-time of the cooling
units.
1. On the Service menu, touch BMS & Teamwork Setup > Teamwork / Standby.
The TEAMWORK/STANDBY panel opens.
2. Touch Unit Rotation.
The UNIT ROTATION CONTROL panel displays, Figure 7-6.
3. Adjust the settings, then touch Save.
• Touch Cancel to discard the changes.
Figure 7-6 Unit Rotation Control panel
Unit-rotation options
Rotation Frequency
Frequency at which rotation occurs. Options include:
• No = Rotation disabled.
• Daily = Rotation occurs every day.
• Every [Day of Week] = Rotation occurs weekly on the same day.
• Monthly [Day of Week] = Rotation occurs monthly on the same day.
Rotate By
Number of positions by which the cooling units rotate. For example, rotate by 3 in a group of 10 units and
start with unit 1 operating. At rotation, unit 1 goes to stand-by and unit 4 activates, then 7, 10, 2, and so on.
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Rotate Every
Selects rotation period. Valid values:
• 12 hrs
• 24 hrs
Lead Lag Overlap Timer
Length of time in minutes that cooling units operate in parallel when one begins operating (from stand-by)
and the other goes into stand-by.
Rotate At
Selects exact time at which rotation occurs.
Rotate Now
Immediately performs rotation.
7.3.1
Manually rotate operating and stand-by units
You can rotate the operating and stand-by units outside of the set schedule using Rotate Now.
NOTE
Manual rotation may only be performed at the cooling unit designated as the lead unit,
“U2U Address = 1,” of the group.
The Rotate Now button may only be available when a Rotation Frequency is selected. See 7.3 Setting a Rotation Schedule, page 75
1. At the cooling unit, verify that it is the lead unit of the group:
• On the Service menu, touch BMS & Teamwork Setup > U2U Setup.
• In the CONTROL BOARD column, verify that the U2U Address is 1.
• If it is the lead unit, continue with Step 2.
• If it is not the lead unit, find the lead unit and start at Step 1.
2. On the Service menu, touch BMS & Teamwork Setup > Teamwork / Standby.
The TEAMWORK/STANDBY panel opens.
3. Touch Unit Rotation.
The UNIT ROTATION CONTROL panel displays.
NOTE
The Rotate Now button may only be available when a Rotation Frequency is selected. See 7.3 Setting a Rotation Schedule, page 75
4. Touch Rotate Now, then touch Save.
The operating and stand-by units are rotated.
• Touch Cancel to discard the changes.
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External Monitoring and Building-management Systems
8.0 External Monitoring
and Building-management Systems
iCOM-controlled cooling units are equipped with Liebert IntelliSlot™ plug-in slots for optional
communication cards to communicate with external monitoring systems including Building Management
Systems (BMS), Network Monitoring Systems (NMS) and Liebert SiteScan® Web.
Two cards are available to provide remote communication to iCOM.
• Liebert IntelliSlot IS-UNITY-DP communication card—communicates with up-to two third-party
protocols to monitor and manage a range of parameters and events and requires Velocity V4
monitoring protocol (standard on firmware versions PA1.04.033 and later). Unity cards deliver:
• Emerson® Protocol for Trellis™, Liebert SiteScan™ and Liebert Nform®.
• Embedded LIFE™ Technology for Remote Service Delivery
• SNMP (v1/v2/v3) for NMS
• HTTP/HTTPS for Web-page viewing
• SMTP for e-mail
• SMS for mobile messaging
• Modbus RTU-Modbus Remote Terminal Unit communication protocol for BMS over an RS-485
serial network (Modbus RTU RS-485)
• Modbus TCP-Modbus Transmission Control Protocol for BMS over Internet or LAN.
• BACnet IP—BACnet over Internet Protocol for BMS over Internet or LAN.
• BACnet MSTP—BACnet Master-Slave/Token-Passing communication protocol for BMS over an
RS-485 serial network (Modbus MSTP RS-485)
• Liebert IntelliSlot SiteLink-E® CARD (IS-485EXI)—monitoring and management via ground-fault
isolated connection to. a Liebert SiteLink-E
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8.1 Building Management Systems Operation
Building-management system (BMS) includes disconnect fail-safe, manual fan-speed control, and the
following communication settings:
• Monitoring protocol
• Monitoring address
• BMS connection to fan control
• BMS hand-shake timer
Figure 8-1 BMS Setup panel
8.1.1
Adjusting monitoring (IntelliSlot) settings
NOTE
Modbus, BACnet, SNMP, SMS and HTTP communication cannot be configured via iCOM. To set
up third-party protocols, refer to the appropriate Liebert IntelliSlot Card user manual.
NOTICE
Risk of loss-of-communication with Liebert IntelliSlot cards. Can cause operational problems.
Do not change the monitoring address of the IntelliSlot card (set at 3) unless directed by factory
technical support representative.
1. On the Service menu, touch BMS & Teamwork Setup > BMS Setup.
The BMS SETUP panel opens, Figure 8-1.
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External Monitoring and Building-management Systems
2. To set up the monitoring protocol, select IntelliSlot Card Settings and adjust them in the INTELLISLOT
CARD SETTINGS secondary panel, Figure 8-2.
3. Touch Save.
The BMS settings are saved.
• Touch Cancel to discard the changes.
Figure 8-2 BMS IntelliSlot Card Settings panel
InstelliSlot card options
Monitoring Protocol
Protocol used for communication with the IntelliSlot card. Factory default = Velocity V4.
Monitoring Address
Address used by IntelliSlot card. Factory default = 3.
Note: Do not modify the monitoring address unless directed to do so by factory technical support.
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8.1.2
Setting BMS control settings
1. On the Service menu, touch BMS & Teamwork Setup > BMS Setup.
The BMS SETUP panel opens.
2. Touch Control Settings.
The CONTROLL SETTINGS secondary panel opens, Figure 8-3.
3. Adjust the settings, and touch Save.
The settings are configured.
• Touch Cancel to discard the changes.
Figure 8-3 BMS Control Settings panel
BMS control options
Fan Control Sensor
Currently-selected fan-control sensor. Must be set to “Manual” for BMS control. See 4.1.4 - Configuring
fan setpoints, page 39.
Maximum Fanspeed
Current fan-speed setting (set via fan setpoints or by BMS).
BMS Timeout Status
Indicates whether or not communication between BMS and iCOM is okay.
Handshake
Sets time-period, in minutes, in which communication between the BMS and iCOM must occur.
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Configuring Auxiliary Devices
9.0 Configuring Auxiliary Devices
With iCOM, you can manage and control many devices that work with your cooling unit(s).
9.1 Fluid-temperature Monitoring
A fluid sensor may be connected to the supply-inlet pipe to monitor local and remote fluid-temperature
differential.
1. On the Service menu, touch Auxiliary Device Setup > Sensors > Fluid Sensors > CW T.
The SENSOR PROPERTIES panel opens, Figure 9-1.
2. Adjust the temperature offset, and touch Save.
The fluid-temperature sensor settings are saved.
Figure 9-1 Fluid Sensors—Sensor Properties
Fluid-sensor options
Fluid Temperature Offset
Correction (calibration) value added to the fluid temperature reading. Used in the event that the fluid
temperature-sensor readings are incorrect.
Note: May be a positive or negative value.
Current Fluid Temperature
Actual temperature reading.
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9.2 Wired Remote Sensors
Wired remote sensors can function as “control” sensors and, subsequently, provide input individually, at
the unit level, or at the system level for temperature control and teamwork functions.
Each wired-remote rack sensor has two thermistors/probes. In “Individual Sensor” mode, the higher
temperature reading or the average temperature reading of the two probes can be used. In “Unit Sensors”
mode, some or all of the rack sensor’s temperature readings are considered for higher (maximum) or
average calculation. For example, setting 3 sensors as “control” and “average” for unit mode, averages the
3 highest temperature readings.
At the system level, using a unit-to-unit (U2U) network, the same maximum or average calculations can be
based on readings from all of the sensors in all of the units in group (including those in stand-by) using
teamwork modes. See 7.1.1 - No Teamwork—multiple zones in one room, page 72.
1. On the Services menu, touch Auxiliary Device Setup > Sensors > Wired Remote Sensors > Setup.
The set-up SENSOR PROPERTIES panel opens, Figure 9-2.
2. Adjust the settings for the cooling units sensor array, and touch Save.
Wired-remote sensor—set-up options list describes the setting options.
3. Touch a specific sensor.
The SENSOR PROPERTIES for that sensor open, Figure 9-3.
NOTE
The sensor number listed corresponds to the DIP-switch assignment of the sensor made
during installation.
4. Touch Name, and use the keyboard to give the sensor a descriptive name.
NOTE
This is the name displayed on the REMOTE SENSORS panel for non-service users. See 3.6 Viewing remote-sensor readings, page 30.
5. Refer to Wired-remote sensor—Sensor-property options list to adjust the remaining settings, and
touch Save.
The wired-remote sensors for the cooling unit are configured.
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Figure 9-2 Wired Remote Sensor—Setup Sensor Properties panel
Wired-remote sensor—set-up options
Individual Remote Sensors Mode
When controlling at the sensor level, selects the method of using the readings from the two temperature
thermistors (probes) on the sensor. Options are:
• Maximum = Use the highest temperature reading of the two thermistors.
• Average = Use the average of the readings from the two thermistors.
Unit Remote Sensors Mode
When controlling at the unit level, selects the method of using the inlet-rack temperature readings from the
control sensors to control fan speed. Options are:
• Maximum = Use the highest temperature reading of the sensors set to Control.
• Average = Use the average of the readings from the sensors set to Control and included in AVG.
Unit Remote Sensors included in AVG
When Unit Remote Sensors Mode is Average, selects the number of sensors used to calculate the
average temperature.
Note: If the number selected is smaller than the number of REM Sensors set to Control, only the
highest readings are used for the calculation.
REM Sensors set to Control
Number of sensors set to control.
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Average Rack Temp
Calculated average of temperature readings from the control sensors.
Max Rack Temp
Highest temperature reading from the unit remote sensors.
Figure 9-3 Wire-remote sensor—Specific-sensor properties panel
Wired-remote sensor—Sensor-property options
Name
Custom, descriptive name to assist in identifying the sensor’s location/function in the facility, for example,
the name of the rack on which it is installed. The name is limited to:
• up to 4 alphanumeric characters in length
• upper- and/or lower-case characters
• the following special characters: & * / . + - : @ \.
Function
Sets the function of the sensor when Unit Remote Sensors Mode is enabled.
• Disable = sensor readings are ignored.
• Reference = sensor readings are considered for Max Rack Temp, but are not used in
maximum/average calculations.
• Control = sensor readings are used in maximum/average calculations.
Left Lead Current Value
Current reading of the left sensor probe. The left probe is always a temperature reading.
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Configuring Auxiliary Devices
Left Lead Offset
Correction (calibration) value added to the reading. Used in the event that the sensor reading is incorrect.
Note: May be a positive or negative value.
Right Lead Current Value
Current reading of the right sensor probe. May be a temperature or humidity reading, depending on the
connected sensor.
Right Lead Offset
Correction (calibration) value added to the reading. Used in the event that the sensor reading is incorrect.
Note: May be a positive or negative value.
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Administering Firmware, Settings and Security
10.0 Administering Firmware, Settings and Security
10.1 iCOM firmware upgrades
NOTE
The iCOM Service Tool (iST) is required to update control-board firmware. Contact technical
support at 1-800-543-2378 for information on control-board updates.
10.1.1 Compatibility with earlier versions of iCOM
Versions of iCOM-control firmware CR 2.xx.xxR are incompatible with earlier firmware versions
CR 1.xx.xxR.
Contact your local Emerson representative to upgrade firmware.
10.1.2 Updating iCOM display firmware
The display firmware is updated by loading the file via USB port, and the update process may take from
30 seconds to 20 minutes typically. Cooling-unit functions continue during a display-firmware update.
1. Download and extract the display-firmware file to a USB drive.
2. Insert the USB drive into an open port on the back of the iCOM display.
The display firmware is updated within 30 seconds to 20 minutes.
10.1.3 Updating iCOM control-board firmware
The FIRMWARE UPGRADE PARAMETERS panel, Figure 10-1, shows the firmware version of the
display and control board of the cooling unit. It also includes settings to use while performing the upgrade.
NOTE
Only personnel who have completed Emerson Network Power training should perform a controlboard update.
The iCOM Service Tool (iST) is required to update control-board firmware. Contact technical
support at 1-800-543-2378 for information on control-board updates.
1. On the Service menu, touch Backup & Security > Load Firmware.
The FIRMWARE UPGRADE PARAMETERS panel opens, Figure 10-1.
2. In Lock for Upgrade, select Yes.
The Configuration Safe status field displays Locked when the control board is ready for upgrade.
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3. Using iST and referring to the settings described in Control-board firmware upgrade settings list,
perform the firmware upgrade.
4. Touch Save.
The control-board firmware is upgraded.
• Touch Cancel to discard the changes without upgrading.
Figure 10-1 Firmware Upgrade Parameters panel
Control-board firmware upgrade settings
Lock for Upgrade
Real-only status left of the slash indicates whether or not the control board is ready for update. Valid values
are:
• None = control board is not ready for upgrade.
• Locked = control board is ready for upgrade.
Drop-down selector right of the slash prepares the control board for a firmware upgrade. Options are:
• No = default, control board is not preparing nor ready for upgrade.
• Yes = prepare control board for upgrade.
• Unlock = unlocks control board to update settings that were altered after the control board was locked.
See 10.1.3.1 - Unlocking the control board before upgrade, page 89.
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Configuration Safe
Read-only status left of the slash indicates whether or not the control-board configuration is modified from
the factory default and if the settings are downloaded using iST. Valid values are:
• Changed = the configuration has been modified.
• OK = Setting changes are saved.
Drop-down selector right of the slash updates the control-board configuration. Options are:
• No = default, no save or upload.
• Save = save changes to the control-board settings.
• Load = upload settings to the control board.
Network Safe
Read-only status left of the slash indicates whether or not the network settings for the control board are
modified from the factory default and if the settings are downloaded using iST. Valid values are:
• Changed = the configuration has been modified.
• OK = Setting changes are saved.
Drop-down selector right of the slash updates the network settings on the control-board. Options are:
• No = default, no save or upload.
• Save = save changes to the control-board network settings.
• Load = upload network settings to the control board.
Bootloader Variables
Read-only status left of the slash indicates whether or variables for the control-board configuration are
modified from the factory default and if the settings are downloaded using iST. Valid values are:
• Changed = the bootloader file must be updated.
• OK = Setting changes are saved.
Drop-down selector right of the slash updates the control-board configuration. Options are:
• No = default, no save or upload.
• Save+Reboot = bootloader file is updated and changes take effect with reboot.
• Save Only = bootloader file is updated, but changes do not take effect until reboot or unit is poweredoff.
• Reboot Only = Saved changes to bootloader file take effect with reboot.
10.1.3.1 Unlocking the control board before upgrade
If changes are made to the settings after the control board is locked for firmware upgrade, use the
following steps to unlock the board and execute the changes.
1. In the Lock for Upgrade field on the FIRMWARE UPGRADE PARAMETERS panel, select Unlock,
then select Yes.
2. Touch Save.
The changes are executed.
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10.2 Managing access permission and PINs
NOTICE
Risk of loss-of-access to iCOM. Can cause operational problems.
When a PIN is changed, make sure you record the new PIN and inform authorized users. If
problems arise, PINs can be reset by factory technical support, call 1-800-543-2378.
Two, 4-digit personal identification numbers (PINs) provide two levels of permission to access iCOM
menus and are set with factory-default values. You can change the value of each PIN so that only those
provided with the current PIN may access the menus that it unlocks.
NOTE
The factory-default PIN for user and service login are:
• Default User PIN = 1490
• Default Service PIN = 5010
NOTE
To change PIN values, you must use the Service PIN currently-assigned to unlock the Service
menu.
1. On the Service menu, touch Backup & Security > Manage Permissions.
The MANAGE PINS panel and ROLE PROPERTIES secondary panel open, Figure 10-2.
2. On MANAGE PINS, touch the role to change, then touch the Value field for the PIN on the secondary
panel.
The EDIT PIN keypad opens.
3. Type a new 4-digit pin, then touch Enter (or Go), and touch Save.
The updated PIN is saved.
• Touch Cancel to discard the change.
Figure 10-2 Manage Pins and Role Properties panels
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10.3 Backing-up, Importing/Exporting and Restoring settings
iCOM settings may be saved to a local disk or USB drive, and the saved files may exported or imported to
restore iCOM if it is replaced or if a problem occurs and to transfer settings to another iCOM. iCOM can
also be returned to factory-default settings.
NOTE
The back-up and export .ini files may be viewed and edited with a text editor such as Notepad.
Figure 10-3 Backup & Restore panel
10.3.1 Backing-up settings
Save a copy of the settings in a file named with the system name that was assigned during start-up. The
saved settings include network settings, unit name, panel configuration and other details of the iCOM
display. Use a back-up file to restore the unit settings in the event of a failure.
1. On the Service menu, touch Backup & Security > Backup and Restore.
The BACKUP & RESTORE panel opens.
2. Touch the Action Type drop-down, then Backup.
3. Touch the Location to which the backup will be saved.
NOTE
USB drives connected to Ports 1 or 2 on the iCOM display are automatically detected and
displayed as options for Location selection.
4. Touch the Backup button in the lower-right corner.
The back-up file is saved and a notification listing the save location, and file name indicates that back
up is complete.
• Remove the USB drive from the port if used.
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10.3.2 Restoring settings
Copy the settings from a back-up file to return iCOM function to exactly what it was before the problem or
failure. The settings may be restored from a file on the local disk or a USB drive.
NOTE
When restoring from a file on USB, make sure that you use the correct back-up file to restore
settings, otherwise settings for the display may be incorrect.
Back-up files are named with the system name (typically programmed via the start-up wizard), and
the default system name is “System Name.” Therefore, if you have multiple iCOM displays and did
not change the system name at startup, you could have different files with the name
“System Name.ini.” If this is the case, be certain that the file on the USB is the back-up file for the
iCOM you want to restore. To update the system name, see 10.4 - Configuring with the start-up
wizard, page 94.
1. On the Service menu, touch Backup & Security > Backup and Restore.
The BACKUP & RESTORE panel opens.
2. Touch the Action Type drop-down, then Restore.
3. Touch the Location from which the settings will be restored.
NOTE
USB drives connected to Ports 1 or 2 on the iCOM display are automatically detected and
displayed as options for Location selection.
4. Touch the Restore button in the lower-right corner.
The settings are restored from the file, and a notification listing the file location and name indicates that
restoration is complete.
• Remove the USB drive from the port if used.
10.3.3 Exporting settings
Save a copy of the iCOM display settings for later import to another iCOM for identical display settings on
both systems.
1. On the Service menu, touch Backup & Security > Backup and Restore.
The BACKUP & RESTORE panel opens.
2. Touch the Action Type drop-down, then Export.
3. Touch the Location to which the settings will be exported.
NOTE
USB drives connected to Ports 1 or 2 on the iCOM display are automatically detected and
displayed as options for Location selection.
4. Touch the Export button in the lower-right corner.
The settings are exported to the UIM.ini file, and a notification listing the file location and name
(UIM.ini) indicates that export is complete.
• Remove the USB drive from the port if used.
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10.3.4 Importing settings
Load iCOM display settings from a previously-exported file to an addition iCOM system for identical
settings, including panel customization and custom labels, on both.
1. On the Service menu, touch Backup & Security > Backup and Restore.
The BACKUP & RESTORE panel opens.
2. Touch the Action Type drop-down, then Import.
3. Touch the Location from which the settings will be imported.
NOTE
USB drives connected to Ports 1 or 2 on the iCOM display are automatically detected and
displayed as options for Location selection.
4. Touch the Import button in the lower-right corner.
The settings are imported from the UIM.ini, and a notification listing the file location and name
indicates that restoration is complete.
• Remove the USB drive from the port if used.
10.3.5 Resetting display settings to defaults
Return the iCOM display to factory-default settings including panel customization, display network settings,
and custom labels. Reset does not affect control-board network settings, setpoints, or alarm thresholds.
1. On the Service menu, touch Backup & Security > Backup and Restore.
The BACKUP & RESTORE panel opens.
2. Touch the Reset to Defaults button in the lower-right corner, then Continue on the confirmation dialog.
(or Cancel to disregard the reset).
The display restarts, and the start-up wizard opens to assist in configuring the reset display.
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10.4 Configuring with the start-up wizard
Upon initial use of the iCOM display or after resetting to defaults, the iCOM start-up wizard, Figure 10-4,
offers to guide you through first-time set up.
NOTE
If you need to update the system name because you have multiple iCOM systems, you can do it
here. Just back-up your settings, restore to defaults, rename the system, then import restore the
backed-up settings.
Figure 10-4 Start-up wizard panel
Start-up wizard options
Language
Selects the display language.
Calibrate Screen
Optimizes touch response. See 1.3.5 - Calibrating the touchscreen, page 8.
Skip
Closes the start-up wizard and uses the factory-default settings.
Import
Imports previously-saved display settings. See 10.3.4 - Importing settings, page 93.
Next
Continues configuration using the set-up wizard.
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Using the wizard:
1. On the WELCOME panel, touch Next.
The UNIT INFORMATION panel opens.
2. Touch each field to make your selections. Make sure to give your system a unique, descriptive name,
then touch Next.
The UNIT DISPLAY panel opens.
3. Touch each field to make your selections, then touch Next.
The NETWORK panel opens.
4. Determine the use of network communications and configure as needed, then touch Next.
The SUMMARY panel opens.
5. Review the selections and settings and, if correct, touch Finish.
• If corrections are needed, touch Previous to return to the appropriate panels.
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Performing Diagnostics
11.0 Performing Diagnostics
11.1
Cooling-unit status LED
Just below the iCOM touchscreen display is an LED that hanged color and flashes on-off indicating
cooling-unit status. See Table 11-1 for the LED colors and meanings.
Table 11-1 Cooling-unit LED colors and state meanings
11.2
State
Color(s)
Meaning
Solid
Green
Powered-on and operating.
Solid
Amber
In diagnostic/service mode or powered-off.
Solid
Red
Active warning or alarm present and acknowledged.
Flashing
Amber/Green
In sleep or U2U stand-by mode and available to operate.
Flashing
Red/Green
Operating with and active warning or alarm.
Flashing
Amber/Red
Shut-down (not operating) because of an un-acknowledged alarm.
Flashing
Red
Active warning or alarm present but un-acknowledged.
Flashing
Blue
iCOM display is starting-up or updating iCOM firmware.
Enabling manual mode for diagnostics
Use manual mode to test components, validate operation, and evaluate performance.
NOTE
When manual mode is enabled, the cooling unit does not operate normally.
•
•
•
•
Fan operation depends on the diagnostic category in use.
Safety routines will prevent the use of some diagnostic features.
Active alarms may prevent some the use of some diagnostic functions.
In most cases, all components are turned-off.
NOTE
When manual mode is disabled, all components and the cooling unit return to normal operation.
See 11.2.1 - Disabling diagnostics manual mode, page 98.
Manual mode times-out after 30 minutes of inactivity and normal operation resumes.
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Manual Mode in the Category list.
The MANUAL MODE panel displays, Figure 11-1.
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3. Touch the Enable check box in the upper-right of the MANUAL MODE panel.
The MANUAL MODE confirmation dialog opens.
4. Touch OK to enable manual mode.
Enable is checked and manual control for diagnostics enabled.
• Touch Cancel to close the dialog and manual mode remains disabled.
Figure 11-1 Manual Mode panel
11.2.1 Disabling diagnostics manual mode
1. On the DIAGNOSTICS panel, touch Manual Mode in the Category list.
The MANUAL MODE panel displays, Figure 11-1.
2. Remove the check mark from the Enable box by touching it.
Manual mode is disabled.
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11.3
Diagnosing evaporator-fan issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Evaporator Fan in the Category list.
The EVAPORATOR FAN panel displays, Figure 11-2.
3. Refer to Diagnostics—Evaporator-fan options list that follows the figure for descriptions of
diagnostic options.
Figure 11-2 Diagnostics—Evaporator Fan panel
Diagnostics—Evaporator-fan options
Analog Output 1 – 4
Status Remote Shutdown
Indicates whether remote shutdown is On or Off.
Current Fan Speed
Current speed of fan.
Fan Motors
Enables/Disables fan motor during manual/diagnostic mode.
Fan Speed Manual Speed
Maximum fan speed during manual/diagnostic mode.
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Status Airflow 1/2
Status of airflow.
Status Filter
Status of the air filter.
Low Supply Temperature Counter
Number of low-temperature alarm events.
11.4
Diagnosing compressor-circuit issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Compressor Circuit 1 in the Category list.
The COMPRESSOR CIRCUIT panel displays, Figure 11-3.
3. Refer to Diagnostics—Compressor-circuit options list that follows the figure for descriptions of
diagnostic options.
Figure 11-3 Diagnostics—Compressor Circuit panel
Diagnostics—Compressor-circuit options
High Pressure Alarm Code
Code of high-pressure alarm.
• 0 (zero) = Okay.
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Low Pressure Alarm Code
Code of low-pressure alarm.
• 0 (zero) = Okay.
High Temperature Alarm Counter
Number if high-temperature alarm events.
Discharge Pressure
Current pressure of the compressor discharge.
Suction Pressure
Current pressure of the compressor suction.
Sump Temperature
Current temperature at the sump.
High Pressure Status
Status of compressor’s high-pressure switch.
Low Pressure Status
Status of compressor’s low-pressure switch.
Cooling Suspended Mode
Enables/Disables “cooling-suspended mode,” sets the fan speed to 10% when the compressor stops (lowload condition).
Compressor 1 Operation
Enables/Disables compressor during manual/diagnostics mode.
Compressor 1 Capacity
Enables/Disables compressor capacity during manual/diagnostics mode.
Compressor Cycle Ramp
Capacity at which compressor runs in manual mode.
Liquid Line Solenoid Valve
Enables/Disables the valve during manual/diagnostics mode.
11.4.1 Resetting High-pressure Alarm Code
When a high-pressure problem has caused a compressor to lock “off,” resetting the High Pressure Alarm
Code to zero (0) unlocks the compressor for operation.
NOTE
Cycling main-power of the cooling unit will also unlock the compressor.
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Compressor Circuit 1 in the Category list.
3. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Pressure Alarm Code,
then touch Save.
The code is reset and the compressor can now operate.
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11.4.2 Resetting High-temperature Alarm Counter
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Compressor Circuit 1 in the Category list.
3. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Temperature Alarm Counter,
then touch Save.
The code is reset and the compressor can now operate.
11.5
Diagnosing reheat issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Reheat in the Category list.
The REHEAT panel displays, Figure 11-4.
3. Refer to Diagnostics—Reheat options list that follows the figure for descriptions of diagnostic
options.
Figure 11-4 Diagnostics—Reheat panel
Diagnostics—Reheat options
Electric Heat 1
Enables/Disables heaters in manual/diagnostic mode.
Status Heaters Safety
Current status of the heater(s)
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11.6
Diagnosing humidifier issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Humidifier in the Category list.
The HUMIDIFIER panel displays, Figure 11-5.
3. Refer to Diagnostics—Humidifier options list that follows the figure for descriptions of diagnostic
options.
Figure 11-5 Diagnostics—Humidifier panel
Diagnostics—Humidifier options
Local Hum PI
Current humidity PI percentage.
Humidifier
Enables/Disables humidification in manual/diagnostic mode.
Hum Cond Protect < 53°F / 11.6°C
Status of low-temperature protection.
Supply Temperature
Current supply-air temperature.
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Hum Cond Protect > 55% RH
Status of high-relative-humidity protection.
Supply Humidity
Current supply-air humidity.
11.7
Diagnosing digital-output issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Digital Outputs in the Category list.
The DIGITAL OUTPUTS panel displays, Figure 11-6.
3. Refer to Diagnostics—Digital-output options list that follows the figure for descriptions of diagnostic
options.
Figure 11-6 Diagnostics—Digital Output panel
Diagnostics—Digital-output options
Alarm Relay
Enables/Disable alarms/warnings during manual/diagnostic mode.
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11.8
Diagnosing analog-output issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Analog Outputs in the Category list.
The ANALOG OUTPUTS panel displays, Figure 11-7.
3. Refer to Diagnostics—Analog-output options list that follows the figure for descriptions of
diagnostic options.
Figure 11-7 Diagnostics—Analog Output panel
Diagnostics—Analog-output options
Analog Output N
Controls analog outputs during manual/diagnostic mode. (where “N” is the analog-output number)
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11.9
Diagnosing customer-input issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Customer Inputs in the Category list.
The CUSTOMER INPUTS panel displays, Figure 11-8.
3. Refer to Diagnostics—Customer-input options list that follows the figure for descriptions of
diagnostic options.
Figure 11-8 Diagnostics—Customer Inputs panel
Diagnostics—Customer-input options
Input N
Status of customer-input sensors. (where “N” is the input number)
Input N
Description of customer-input sensors. (where “N” is the input number)
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11.10 Diagnosing dehumidifier issues
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Dehumidification in the Category list.
The DEHUMIDIFIER panel displays, Figure 11-9.
3. Refer to Diagnostics—Dehumidifier options list that follows the figure for descriptions of diagnostic
options.
Figure 11-9 Diagnostics—Dehumidifier panel
Diagnostics—Dehumidifier options
Dehumidification Envelope
Current status of dehumidification envelope.
• Active = Dehumidification is disabled because the Dehum Timer has timed-out.
12h Dehum Counter
Number of dehumidification-timer time-outs.
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11.11 Managing brown-out protection
1. On the Service menu, touch Diagnostic/Service > Diagnostics.
The DIAGNOSTICS panel opens.
2. Touch Brown Out Protection in the Category list.
The brown-out protection panel displays, Figure 11-10.
3. Refer to Diagnostics—Brown-out protection options list that follows the figure for descriptions of
diagnostic options.
Figure 11-10 Diagnostics—Brown-out protection panel
Diagnostics—Brown-out protection options
Enable Brown Out Protection
Enables/Disables brown-out protection during manual/diagnostic mode.
[Digital-input] Delay
Sets on/off and off/on delay for all digital inputs designated as follows:
• REM = remote shut-down
• CI N = customer input (N = number assigned to customer input)
• T FAN = top fan
• HP = high pressure
• LP = low pressure
• EHO = heater-safety thermostat
• B FAN = bottom fan
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12.0 Customizing Your iCOM Display
12.1 Setting general display properties
NOTE
You must be logged-in to adjust the settings. See 1.3.1 - Powering-on iCOM and Loggingin/Unlocking controls, page 5.
1. Touch
, then
.
The User menu opens.
2. Touch Display Options > Display Properties.
The UNIT DISPLAY panel opens, Figure 12-1.
3. Touch a value to select the setting from the drop-down list
4. Touch Save to save the property settings.
• Touch Cancel to discard changes.
Figure 12-1 Unit Display panel
Unit-display options
Language
Selects the display language.
Measurement System
Selects the units of measurement.
Inactivity Timer
Time to elapse before display locks.
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Alarm Buzzer Pattern
Selects or disables the audible alarm notification. See 5.4 - Enabling the audible alarm notification,
page 60.
LED Brightness
Percentage brightness of the display.
Touch Beep
Enable/Disable sound when display is touched.
Touch Shockwave
Enable/Disable visual “shockwave” when display is touched.
12.2 Customizing main-display views
The default iCOM display view is a layout of two panels, one with status content and the other with alarms
content. You can create custom display views with layouts of 1 to 4 panels.
NOTE
You must be logged-in to customize the view. See 1.3.1 - Powering-on iCOM and Loggingin/Unlocking controls, page 5.
12.2.1 Creating a display view layout
1. Touch
, then
.
The User menu opens.
2. Touch Display Options > Customize Layout.
The PANEL CONTENT panel opens, Figure 12-2.
Figure 12-2 Panel Content panel
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3. Touch New in the lower-right corner, then New View to open the on-screen keyboard.
4. Type a unique, descriptive name for the new view layout and touch Go.
5. In the Layout column, use the up/down arrows to select the number of panels for the view.
6. In PANEL OPTIONS, Figure 12-3, touch a content type then touch the panel in which you want it
displayed.
Table 12-1 - Panel-content options, page 113, describes the content types.
7. When finished, touch Save.
The view is saved.
• Touch Cancel to exit without saving the view.
8. Touch Save.
The PANEL CONTENT list is saved with the new view layout.
Figure 12-3 Panel Content and Options for creating/editing view and layout
12.2.2 Editing a display view layout
1. On the User menu, touch Display Options > Customize Layout.
The PANEL CONTENT panel opens.
2. Touch the view to edit then touch Edit in the lower-left corner.
• Touch the view’s name to edit it.
• In the Layout column, use the up/down arrows to change the number of panels for the view.
• In PANEL OPTIONS, Figure 12-3, touch a content type then touch the panel in which you want it
displayed.
3. When finished, touch Save.
The updated view is saved.
• Touch Cancel to exit without saving the changes.
4. Touch Save.
The PANEL CONTENT list is saved with the updated view layout.
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12.2.3 Selecting the display view for the main display
1. On the User menu, touch Display Options > Customize Layout.
The PANEL CONTENT panel opens.
2. Touch the radio button next to the view to display, then touch Save.
The custom view is displayed.
12.2.4 Removing a custom view
1. On the User menu, touch Display Options > Customize Layout.
The PANEL CONTENT panel opens.
2. Touch the view to remove, then touch Remove at the bottom-left.
The view is removed from the list.
3. Touch Save.
The PANEL CONTENT list is saved.
12.3 Customizing panel content
The panels in the display views are editable. You can resize, move, add or replace content. You can also
remove panels from the current display.
12.3.1 Accessing panel-edit mode
NOTE
You must be logged-in to access the editing options. See 1.3.1 - Powering-on iCOM and
Logging-in/Unlocking controls, page 5.
Touch the panel-edit icon,
.
– or –
Touch any open area of the of the panel.
The Change Content button appears.
Figure 12-4 Change Content button in panel-edit mode
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12.3.2 Replacing panel content
There are several types of panel content to choose from. Table 12-1 describes the options.
Table 12-1 Panel-content options
Content type
Description
Alarms
List of active alarms and warnings.
Status
Display of various states readings, setpoints, and data.
Run Hours
Event Log
List by date/time of the last 400 events generated for the cooling
unit.
Sensor Data
List of the standard and optional sensors monitored by iCOM and
the current reading of each sensor.
Setpoints
List of setpoints.
Remote Sensors
List of remote sensors and graphical display of the current reading
of each sensor.
1. On the panel, touch
.
The Change Content dialog opens, Figure 12-5.
2. Touch the icon(s) for the content that will replace the current content.
3. When finished, touch the screen outside the panel you are editing.
The changes are saved and panel-edit mode exited.
• To change back to the previous content, open Change Content again and use the Undo icon in the
upper-right corner.
Figure 12-5 Change Content dialog
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12.3.3 Resizing and Moving a panel
1. On the panel, touch
, then touch
again.
The panel-edit options display, Figure 12-6:
• Border with 8 handles for resizing
• Blue “move” circle in the center
2. To resize the panel, touch and drag a handle on the panel border.
– or –
To move the panel, touch the blue circle in the center and drag the panel to the new location.
Figure 12-6 Panel edit options
12.3.4 Removing a panel
NOTE
Removing a panel from the display with this method only closes it. It will re-appear when the
display is restarted if it is a part of the selected display-view. To permanently edit the display view,
see 12.2 - Customizing main-display views, page 110.
1. On the panel, touch
, then touch
again.
The panel-edit options display, Figure 12-6.
2. Touch the X inside the blue circle in the upper-right of the panel.
The panel is removed.
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12.3.5 Adding content to a status panel
NOTE
Adding parameters is only available on a panel with “status” content.
1. On the panel, touch
.
2. Touch the add-parameter icon,
.
The Add parameter dialog opens, Figure 12-7.
NOTE
If a panel has available space, the add-parameter icon displays. If you do not see the addparameter icon, you can resize the panel or remove content and replace it with the parameter you
want to add, see 12.3.3 - Resizing and Moving a panel, page 114.
3. Touch the parameter to add.
Figure 12-7 Add parameter dialog
12.3.6 Moving content in a status panel
NOTE
Adding parameters is only available on a panel with “Status” content.
1. On the panel, touch
.
2. Touch the parameter to move and drag it to the new location.
NOTE
You cannot move the setpoint control.
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12.3.7 Customizing the status dial
The status dial can be customized to display setpoints, key environmental conditions, and other
information.
1. Touch and hold the center area of the status dial, Figure 12-8.
The DIAL CONTROL SETUP panel opens, Figure 12-9.
Figure 12-8 Touch-and-hold to access dial set up
Figure 12-9 Dial Control Setup panel
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2. Touch an option on the list of set-up options, and select the settings to display. The settings are
described in Table 12-2.
Table 12-2 Status-dial set-up options
Section
Options
Description
Upper-center
Sensor reading or
parameter setting
A single sensor reading. Typically the most critical or most-often
checked because of display size and prominence.
Lower-center
Sensor reading/
Parameter setting
Single or multiple readings depending on selections
check-marked.
Control setpoint
Setpoint for the selected control. Control options are:
• Humidity Control
• Fan Control
• Temperature Control
Control sensor
Sensor from which the readings are used to calculate the control
setpoint. Sensor options are:
• Supply Sensor
• Remote Sensor
• Return Sensor
Left-side
and
Right-side
12.3.8 Selecting Graphical/List view for status and dates
The default setting for panels with status content and for the date-selection dialogs of the control header
are “graphical” view. You can select list view using the switch in the upper-right of these dialogs,
Figure 12-10.
• To change the data view, touch the switch.
The view changes.
Figure 12-10 Graphical/List view switch
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12.4 Customizing parameter and field labels
You can customize header labels for parameters in the menus, you can customize field names, and you
can search for fields and parameters to customize.
1. Touch USERICON, then MENUICON.
The User menu opens.
2. Touch Display Options > Custom Labels.
The CUSTOM LABELS panel opens, Figure 12-11.
Figure 12-11 Custom Labels panel
3. Use the search box and on-screen keyboard to find the label to customize
4. Touch the field to customize.
The EDIT LABELS panel opens.
5. In the Custom Field Name column, touch the text box to edit, make changes and touch Go using the
on-screen keyboard.
The Custom Field Name is updated.
• Touch Cancel to discard the change.
6. When finished editing labels, touch Save.
The custom field name is updated in the Custom Labels list.
• Touch Cancel to discard the changes without saving.
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13.0 Hardware Installation
13.1 Installing Wired Remote Sensors
Up to 10 remote-sensor modules, installed in the monitored racks and connected to the cooling unit,
provide control and reference input to iCOM and building-management systems. Using remote, rack
sensors combats cooling problems related to recirculation air, uneven rack loading, and air distribution.
Each CRV comes with 3 2T sensors standard. Although using and adding additional remote sensors is
optional, Emerson recommends attaching one remote sensor to each rack that the CRV is intended to cool
because they allow more efficient and effective operation of the cooling unit.
The sensor array consists of 2T sensors that each have two temperature probes on a 6-ft (1.8-m) probeconnection cable, Table 13-1, and requires several steps to prepare, connect, and begin monitoring the
racks:
• Set DIP switches in each sensor.
• Terminate final sensor on CANbus link.
• Install sensors on racks.
• Install CANbus cabling between sensors.
• Connect CANbus cable to the cooling unit.
• Configure the sensors in iCOM.
NOTE
The 2T sensor shown in Figure 13-1 may differ slightly for your system, depending on equipment
installed.
Figure 13-1 2T sensor for rack monitoring
13.1.1 Setting DIP switches and labeling 2T sensors
Tools required:
• Small, non-conductive tool to set switches
• Small, Phillips-head screw driver to open 2T housing.
Each sensor requires a unique address on the CANbus cable connected to the cooling unit. Although not
required, we recommend that you set the DIP-switch sensor-number setting to correspond to the sensor’s
location on the CANbus run. If settings are incorrect, the control will not operate properly.
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The DIP switches in 2T sensors included with each CRV are factory-set according to Table 13-1. If adding
additional 2T sensors, use the steps that follow to set the DIP switches.
Table 13-1 DIP-switch settings for factory-supplied rack sensors
2T sensor
number/address
DIP-switch position
1
2
3
4
5
6
7
8
Factory
Termination
Setting
1
Off
Off
On
Off
On
Off
Off
Off
Unterminated
2
On
Off
On
Off
On
Off
Off
Off
Unterminated
3
Off
On
On
Off
On
Off
Off
Off
Terminated
NOTE
Sensors are connected in a daisy chain to the cooling-unit control board. You can extend the
sensor network (up to 10) by adding sensors to the end of the chain and adjusting the termination
settings.
Do not run individual wires from the sensors to the cooling unit.
1. Apply numbered stickers to the sensor housing that corresponds to the sensor’s position in the chain.
2. Locate the DIP-switch hole on the rear of the sensor housing, Figure 13-2.
– or –
If the hole is not present, or the settings are difficult to make through the hole, remove the cover,
Figure 13-2, by removing the Phillips-head screws (typically 3).
Figure 13-2 DIP-switch opening/DIP switches inside of 2T sensor
NOTE
Use the non-conductive DIP-switch tool (included) or a similar tool to set switches.
Do not insert any metal object into the sensor case.
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3. Referring to Table 13-2 and using the non-conductive tool, set the DIP switches for each sensor to its
number in the chain (from sticker applied in Step 1).
Figure 13-3 shows a representation of the DIP switches:
Table 13-2 DIP-switch settings for wired-remote sensors
2T sensor
number/address
DIP-switch position
1
2
3
4
5
6
7
8
Factory
Setting
Factory-supplied sensors
1
Off
Off
On
Off
On
Off
Off
Off
Unterminated
2
On
Off
On
Off
On
Off
Off
Off
Unterminated
3
Off
On
On
Off
On
Off
Off
Off
Terminated
Optional added sensors
4
On
On
On
Off
On
Off
Off
Off
Unterminated
5
Off
Off
Off
On
On
Off
Off
Off
Unterminated
6
On
Off
Off
On
On
Off
Off
Off
Unterminated
7
Off
On
Off
On
On
Off
Off
Off
Unterminated
8
On
On
Off
On
On
Off
Off
Off
Unterminated
9
Off
Off
On
On
On
Off
Off
Off
Unterminated
10
On
Off
On
On
On
Off
Off
Off
Unterminated
The last 2T sensor in the array must be terminated. If more than the 3 factory-supplied sensors are installed,
sensor #3 must be unterminated and the last sensor must be terminated.
Figure 13-3 DIP switches in 2T sensor
Up = ON
Down = OFF
4. Confirm that the DIP switches are set correctly for each sensor, and replace the housing cover if
necessary.
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13.1.2 Terminating the last sensor on the CANbus link
The 2T sensor need not be installed in the numeric-order of their address/sensor number (although it may
be easier for later maintenance). However, the last sensor in the chain must be terminated. All others must
remain un-terminated. Emerson also recommends that you make a record of the sensor numbers along
with the name/number of the rack on which they are installed. Figure 13-4 shows an example CANbus
arrangement.
NOTE
To add sensors, un-terminate final sensor, add sensors to the chain, and terminate the new final
sensor.
Figure 13-4 Sensor CANbus arrangement
CRV unit
Factory
wiring
Terminated
Sensor
CANbus communication link
P22
P38
P39
P53
P52
P51
P4
TB1
P35
E1 E2 E3 E4
P7
P33
P34
P36
P54
P43
iCOM
Control Board
P13
P32
P40
P66
P8
P12
P11
P18
P67
Unit
T/H
2T
#2
2T
#3
2T
#1
2T
#4
P65
P61
P63
P64
E5
1. Locate the sensor that will be last on the network.
NOTE
The last sensor on the network will be the sensor with only 1 CAN cable after all sensors are
connected to the CANbus network. See 13.1.5 - Connect the CANbus cable and ground.
2. Open the sensor’s case by removing the Phillips-head screws (typically 3) one the rear of the housing
to acces the jumper used for terminating.
3. Remove the black jumper from pins 1 and 2, and install it on pins 2 and 3 as shown in Figure 13-5.
4. Replace the sensor cover.
The 2T sensor is terminated in the CANbus link.
Figure 13-5 Termination-jumper on 2T circuit board
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13.1.3 Routing CANbus cable and preparing for sensor installation
Depending on the CRV model number, the CANbus cables may enter the cooling unit from differing
locations to connect to the return-air temperature sensor.
• For 300 mm (24 in.): CR019 and CR032 models, the CANbus cable may enter through the top or
bottom. See 13.1.3.1 - Preparing for sensor-cabling of CRV 300 mm (12 in.) units—CR019 and
CR032.
• For 600 mm (12 in.): CR020, CR035, and CR040 models, the CANbus cable enters through the top of
the unit. See 13.1.3.2 - Preparing for sensor cabling of CRV 600 mm (24 in.) units—CR020,
CR035 and CR040.
NOTE
Connecting the CANbus sensors requires entering the high-voltage electrical compartment in the
CRV. Consider hiring a certified electrician.
13.1.3.1 Preparing for sensor-cabling of CRV 300 mm (12 in.) units—
CR019 and CR032
! WARNING
Risk of electric shock. Can cause injury or death.
Open all local and remote electric power supply disconnect switches, verify with a voltmeter that
power is Off before working within.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live high-voltage.
Before proceeding with installation, read all instructions, warnings and cautions in this document.
This work should be performed by properly trained and qualified personnel.
1. Verify that all power entering the unit is disconnected.
2. Open the rear door on the back of the unit and remove the filters to access the unit-disconnect switch.
3. Turn the High Voltage disconnect switch to Off.
4. Locate the 10-ft (3 m) CANbus cable that shipped with the 2T sensors in the box on the unit skid.
5. Determine whether routing through top or bottom of unit, and locate low-voltage field wiring entry
points, shown in Figure 13-6.
• Route the cable through the low-voltage-access, 7/8-in. knockout using the proper strain relief.
• Once inserted through knockout, route the cable to the IntelliSlot bracket inside the unit.
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Figure 13-6 CANbus wire routing for CRV 300 mm (12 in.) units—CR019 and CR032
Low-voltage field wiring
Top entry
Top-entry field routing
of CANbus wiring
Ground
Connector
(factory installed)
DX units
CW units
Low-voltage field wiring
Bottom entry and field routing
of CANbus wiring
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6. Remove the termination plug from the temperature sensor (which is installed on the IntelliSlot bracket),
and discard the plug, and connect the cable to the open CANbus port, Figure 13-7.
7. Connect the CANbus ground to the factory-supplied ground connector.
Figure 13-7 Remove Termination plug and insert CAN cable
Termination Plug
CAN cable
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13.1.3.2 Preparing for sensor cabling of CRV 600 mm (24 in.) units—
CR020, CR035 and CR040
! WARNING
Risk of electric shock. Can cause injury or death.
Open all local and remote electric power supply disconnect switches, verify with a voltmeter that
power is Off before working within.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live high-voltage.
Before proceeding with installation, read all instructions, warnings and cautions in this document.
This work should be performed by properly trained and qualified personnel.
1. Verify that all power entering the unit is disconnected.
2. Open the top, display door on the front of the unit, Figure 13-8.
3. Turn the High Voltage disconnect switch to Off.
4. Locate the 10-ft (3 m) CANbus cable that shipped with the 2T sensors in the box on the unit skid.
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5. At the top of the cabinet, route the cable through the 7/8-in. knockout using the proper strain relief,
then route the cable to the return-air temperature sensor inside the unit, Figure 13-8.
Figure 13-8 CANbus top-entry wiring for CRV 600 mm (24 in.) units—CR020, CR035, and CR040
Cable-connection top-entry
Top display
door
Temperature
sensor
Rear
View
Front
View
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Rev. 3
6. Remove the termination plug from the temperature sensor, and discard the plug, and connect the
cable to the open CANbus port, Figure 13-9.
7. Connect the CANbus ground to the factory-supplied ground connector.
Figure 13-9 Remove Termination plug and insert CAN cable
Termination Plug
CAN cable
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Rev. 3
Hardware Installation
13.1.4 Installing 2T sensors in the racks to monitor
Tools required
• Medium, flat-head screw driver to open electric-panel dead-front
• Cutting tool to trim cable ties
NOTE
Do not install a sensor in the hot aisle.
Do not leave sensor probes coiled on top or coiled inside of a rack.
1. Install the rack temperature sensors on the rack adjacent to the CRV as shown in Figure 13-10 or
Figure 13-11.
Figure 13-10 Rack sensor placement for 600 mm (24 in.) models
2T Sensors with labels visible
First probe
12" (305mm)
Cable Connection Entry
Top Inlet
(Protective Bushing FieldSupplied and Installed)
Second probe
approximate
center of rack,
in front of
equipment
DPN001983
Rev. 2
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Hardware Installation
Figure 13-11 Rack sensor placement for 300 mm (12 in.) models
2T Sensors with labels visible
First probe
12"
(305mm)
Cable-connection top-entry
(Protective bushing fieldsupplied and installed)
Second
Probe
Approximate
center of
rack in front
of equipment
Cable-connection
bottom-entry,
see cable-routing figure
appropriate to your CRV
model (DX or CW)
(protective bushing
field-supplied
and installed).
DPN002975
Rev. 4
NOTE
Both probes on the 2T sensor must be installed on the same rack.
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Hardware Installation
2. Install the 2T sensor probes the front door of the rack (inside or outside the door):
a. Using a cable tie, secure the sensor wire so that a probe is approximately 12 in. (305 mm) from the
top and in the center of the front door.
This sensor monitors hot air coming over the top of the rack from the hot aisle.
NOTE
Do not wrap cable ties around the actual sensor probe.
If the rack has no door, secure the probes to the rack at the side of the front opening.
b. Use a cable tie to secure the sensor wire of the second probe to the front door so that it is centered
in front of the heat-generating equipment drawing air.
• If the cabinet is completely-filled with equipment, determine the center based on cabinet width
and height.
c.
With probes in place, use cable ties to route the wires neatly up the rack door and into the rack
leaving enough slack in the wire so that the rack door opens and closes without binding or
pinching the wire.
d. Using the supplied, hook-and-loop fastener, connect the 2T-sensor housing to the rack in an
easily-accessible location and with the sensor number visible.
3. Repeat Step 2 until all sensors are installed.
13.1.5 Connect the CANbus cable and ground
! WARNING
Risk of electrical shock. Can cause injury and death.
Disconnect local and remote power supplies before working within the unit.
Before proceeding with installation, read all instructions, verify that all the parts are included. The
microprocessor does not isolate power from the unit, even in the Unit Off mode.
Some internal components require and receive power even during the Unit Off mode of the Liebert
iCOM control.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live high voltage.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote
disconnect switch. Refer to the unit electrical schematic.
Follow all local codes.
Cabling considerations
• For cable up to 150-ft (45-m) long, no special considerations are needed.
• Cable 150 ft (45 m) to 300 ft (91 m), contact the factory.
• The CANbus cable network requires a ground wire.
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Hardware Installation
Connecting cables
1. Connect CANbus cable and a ground wire between each sensor for the cooling unit, Figure 13-12,
taking the following precautions:
NOTE
Remember that the last sensor on the chain must be terminated as described in 13.1.2 Terminating the last sensor on the CANbus link.
• Use only approved hangers, and do not secure cables in a way that could damage them.
• Limit bends to less-than 4-times the diameter of the cable.
• When securing and hanging, avoid deforming the cable.
• Keep cables away from devices that may cause interference such as high-voltage wires,
machinery, fluorescent lights and electronics.
NOTE
High-voltage sources much be at-least 12 in. (305 mm) from CAN wires.
• Avoid stretching cables.
• Avoid using excess cable between sensors.
• Make sure that cables have the correct pin-out. Mismatched pins at the RJ2 connection will
damage the CAN device.
2. Connect the ground connection between each sensor, Figure 13-12.
Figure 13-12 CANbus and ground connection on 2T sensor
NOTE
Once installed, see 9.2 - Wired Remote Sensors for set-up and operation.
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Hardware Installation
13.2 U2U Network Installation
13.2.1 Required network equipment
Ethernet cable CAT5 or greater.
• Maximum cable length is 328 ft (100 m).
• An Ethernet repeater is required for cable lengths greater than 328 ft (100 m).
Network switch
• IEEE 802.3; IEEE 802.3u
• 10/100 Mbps speed
• Multiple 10/100 RJ-45 ports, one shared.
• RJ-45 up-link port
NOTE
Up to 32 cooling units may be connected in a U2U network.
13.2.2 Plan wiring runs
When planning the layout of the conditioned space, consider the following:
• Good wiring practices.
• An Ethernet repeater is required for cable lengths greater than 328 ft (100 m).
• A private network that only connects and manages the cooling units is required.
• Keep control and communication cables away from power cables to prevent electromagnetic
interference.
• Keep cables away from noise-introducing devuses such as machines, flourescent lights and
electronics.
• Do not bend cables to less than 4 times the diameter of the diameter of the cable.
• Do not deform cables when hanging or securing in bundles.
• Do not exceed 25 lb (11 kg) of tension when pulling cables to avoid stretching.
• Do not damage cables when securing them. Use only approve hangers, such as telephone wire/RG-6
coaxial-wire hangers.
13.2.3 U2U Wiring connection
NOTICE
Cooling units are factory-wired for stand-alone operation. Do not connect the U2U network cabling
before setting the U2U network configuration/groups. Network communication conflicts and unreliable display readings will result.
Before you begin, refer to 6.1 - Preparing for U2U Group Set-up, and 6.2 - Configuring U2U
network settings.
– or –
Contact a Liebert-trained technican. 1-800-LIEBSRV (800-543-2778),
technicalservice@emersonnetworkpower.com.
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13.2.3.1 U2U network requirements
The network must be private:
• Isolated from other network traffic.
• Switches connecting the units must be dedicated to iCOM communication only.
• Do not connect the U2U network to the building or IT network. If the U2U network experiences a
failure, the cooling units continue to operate independently.
iCOM supports up-to 64 nodes on the U2U network. The following are considered nodes:
• Input/output board (1 in each cooling unit)
• Large wall-mount display
Small touchschreen displays on the cooling unit are not considered nodes because they are directlyconnected to the input/output board in the unit, not the network.
Of the 64 nodes, up to 32 may be cooling-unit input/output boards. Table 13-3 provides U2U
network-configuration examples.
Table 13-3 Example iCOM U2U Network Configurations
No. of
No. of
Configuration input/output boards wall-mount Private switch
example
(cooling units)
displays
required?
Liebert® iCOM® User Manual
A
2
0
No
B
2
1
Yes
C
3
0
Yes
D
8
1
Yes
E
32
5
Yes
F
32
32
Yes
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Hardware Installation
13.2.4 Wiring Cooling Units without Wall-mount Displays
NOTE
Cooling units are factory-wired for stand-alone operation. Do not connect the U2U network cabling
before setting the U2U network configuration/groups. Network communication conflicts and unreliable display readings will result.
Before you begin, refer to 6.1 - Preparing for U2U Group Set-up, and 6.2 - Configuring U2U
network settings.
To connect 300 mm (12 in.) units, Figure 13-13:
1. Unplug the red cable from P64 at the I/O board, connect it to the crossover coupler provided.
2. Connect a field-supplied, straight-through Ethernet cable to the crossover coupler and the network
switch.
3. Connect a second field-supplied, straight-through Ethernet cable to P64 and the network switch.
Figure 13-13 Connecting 300 mm (12 in.) units
Ethernet Cable
Touchscreen (rear view)
E5
P66
P12
iCOM
I/O board
P67
P65
Network switch
(field-supplied)
Coupler
(factoy-supplied)
P11
P64
P13
P63
To ETH-2 on rear
of other cooling-unit touchscreens.
P7
P61
Straight-through
Ethernet cables
133
DPN003593
Rev. 0
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Hardware Installation
To connect 600 mm (24 in.) units:
• On each unit, connect one plug on the CAT5 cable to ETH-2 on the rear of the display, and the other to
the network switch, Figure 13-14.
Figure 13-14 Connecting 600 mm (24 in.) units
Ethernet Cable
(field-supplied)
Touchscreen (rear view)
Ethernet cable
P61
P63
P64
E5
P12
P11
To ETH-2 on rear
of other cooling-unit touchscreens.
P7
P13
iCOM
I/O board
Network switch
(field-supplied)
P66
P67
P65
DPN003592
Rev. 0
13.2.5 Wiring Cooling Units with Wall-mount Displays
NOTE
Cooling units are factory-wired for stand-alone operation. Do not connect the U2U network cabling
before setting the U2U network configuration/groups. Network communication conflicts and unreliable display readings will result.
Before you begin, refer to 6.1 - Preparing for U2U Group Set-up, and 6.2 - Configuring U2U
network settings.
Large, wall-mount displays may be used to remotely configure, control and monitor all cooling units
connected on the U2U network.
• Each display requires 120 VAC or 230 VAC input power.
• An AC-adapter wall plug is factory-supplied.
1. On each wall-mount display (32 max.), connect one plug of a straight-through Ethernet cable to port
P64 on the rear of the display.
2. Connect the other end to the U2U network switch.
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Technical Support / Service
Web Site
www.liebert.com
Monitoring
liebert.monitoring@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Single-Phase UPS & Server Cabinets
liebert.upstech@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Three-Phase UPS & Power Systems
800-543-2378
Outside North America: 614-841-6598
Environmental Systems
800-543-2778
Outside the United States: 614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 2572220
Fax: 852 28029250
While every precaution has been taken to ensure the accuracy and completeness of this literature, Liebert Corporation assumes no responsibility and disclaims
all liability for damages resulting from use of this information or for any errors or omissions.
© 2016 Liebert Corporation
All rights reserved throughout the world.
Specifications subject to changewithout notice.
® Liebert is a registered trademark of Liebert Corporation. All names referred to are trademarks or registered trademarks of their respective owners.
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www.emersonnetworkpower.com