7ATS (4441 calls out of 103444)
(Automatic Transfer Switch)
(As of December 31, 2014; based on inbound calls, voicemails and inbound e-mails @ 88 months)
Features (total of 911 calls, average of 10 calls per month)
Operation (total of 278 calls, average of 3 calls per month)
Others (total of 2104 calls, average of 24 calls per month)
Product Installation (total of 444 calls, average of 5 calls per month)
Service (total of 613 calls, average of 7 calls per month)
Wiring (total of 91 calls, average of 1 call per month)
Frequently Asked Questions
Features
How do I access the event logs? (4 calls)
How do I set the transfer time delays? (94 calls)
How do I communicate with the ATS? (101 calls)
How do I prevent or inhibit the ATS from transferring? (55 calls)
How do I set the engine exerciser? (44 calls)
Is the clock of the engine exerciser accurate? (0 call)
What is an in-phase monitor? (11 calls)
What auxiliary features does the ATS offer? (97 calls)
How do I program the accessory 111A? (0 call)
What is the default password? (40 calls)
How do I set the in-phase monitor? (8 calls)
What is the heat dissipation for transfer switch? (1 call)
Operation
Can I adjust the sensing of the controller? (13 calls)
How do I change the password? (0 call)
How do I perform a transfer test? (34 calls)
How does the ATS work? (98 calls)
How do I manually operate the ATS? (26 calls)
How does the engine exerciser work? (10 calls)
What is the contact transfer time of the ATS? (9 calls)
How do I stay on the emergency source of a bypass switch? (21 calls)
How do I reset the controller board? (31 calls)
How does the in-phase monitor work? (16 calls)
How does the generator to generator ATS work? (14 calls)
Others
Blanks or helpdesk operation (926 calls)
Literature Request (237 calls)
Parts Inquiry (846 calls)
Warranty Issues (43 calls)
Generator issues (5 calls)
Order processing (0 call)
Order/Invoice Status (0 call)
Request for price and availability (42 calls)
What is the software version of the controller? (0 call)
How can I specify a switch with a cam lock provision for mobile generators (0 call)
Product Installation
Can the ATS switch between different voltages? (3 calls)
How do I configure the ATS controller? (9 calls)
How do I install an ATS? (26 calls)
Where can I get the weight and dimensions of the ATS? (52 calls)
What size of cable or wire can I use for the power connections of the ATS? (40 calls)
When do I need to connect the neutral? (0 call)
How do I specify a transfer switch? (123 calls)
How do I specify the type of neutral? (0 call)
What is the WCR of the ATS? (99 calls)
Which breakers are tested with an ASCO transfer switch? (0 call)
Where do the power cables enter the switch? (58 calls)
Service
Can I modify the voltage rating of the ATS? (14 calls)
How can I extend feature 1C timer? (0 call)
How do I contact a service technician? (253 calls)
How do I convert an ACTS to an ATS? (9 calls)
How do I convert an ATS to an ADTS? (0 call)
How do I convert the ATS from 1Φ to 3Φ? (0 call)
How do I convert the ATS from 3Φ to 1Φ? (5 calls)
How will I know if the controller is damaged? (75 calls)
What does this alarm message mean? (0 calls)
What would have cause "ATS Position Error"? (0 calls)
What should I do if the indicator lights are faulty? (4 calls)
Why won't the ATS retransfer to normal? (34 calls)
Why won't the ATS transfer to Emergency? (96 calls)
Why won't the engine exerciser work properly? (0 call)
Why won't the generator shut-off? (30 calls)
How do I remove the shorting block? (0 call)
Why won't the ATS start the generator? (10 calls)
Wiring
Where do I connect the engine start wires? (82 calls)
How can I re-wire my power manager connections? (9 calls)
Where can I get load shed signals? (11 calls)
Where can I get pre-transfer and post transfer signals? (35 calls)
Where can I get source availability signals? (22 calls)
Where can I get switch position contacts? (45 calls)
Where do I connect the engine start wires? (35 calls)
Features
How do I access the event logs?
To access the event logs:
Normal OK
1. Go to the Group 5 controller and press the
ESC button until the display shows
2. Press Enter/Save Settings, then Menu
Scroll until the display shows
Load on Normal
<<<
VIEW
Event Log
3. Press Enter/Save Settings, then Menu
Scroll to view the events
How do I communicate with the ATS?
To communicate with the ATS, you need to install a serial
communication module (Acc. 72A) or a connectivity module (Acc. 72E) to
the Group 5 controller. The modules will serve as a gateway to other
devices that will communicate with Group 5. Group 5 can communicate
at ASCOBUS 1, ASCOBUS 2, MODBUS TCP and MODBUS RTU
protocols over a serial network. ASCO also offers SITEWEBTM and
PowerQuest® Vpi as possible options of setting-up the network. (Click
Here for more info)
PowerQuest® Vpi
SITEWEBTM
>>>
How do I configure the inhibit transfer signal?
Inhibit features are included in the Factory Selectable Features program of the Group 5 controller and as
such, cannot be modified by the end user. These features are usually specified by the customer to be
included in the ATS’s optional accessories upon ordering, or require services from the ASI service
technicians to do the modification onsite.
How do I set the engine exerciser?
To set the exerciser, just follow the procedures below:
How do I specify an ATS?
To specify the ATS, just follow the catalog no. format below:
How do I communicate with the ATS?
The Series 7000 group 5 controller can communicate at MODBUS RTU, MODBUS TCP, ASCOBUS 1 and
ASCOBUS 2 protocols at 9600 and 19.2K-baud rates. For a detailed discussion regarding Communication
products and application, go to Communications Products FAQ’s.
What is an in-phase monitor?
An In-phase monitor is a motor load transfer feature that monitors the voltage and frequency of the two
sources. It ensures that the voltage and the frequency of the two sources are within acceptable phase
angles (in electrical degrees) before the ATS transfers the load between two live sources to avoid nuisance
tripping on the breaker/s.
What auxiliary control features does the ATS offer?
Click here to view the list of optional control features that the ATB offer.
What is the WCR of my transfer switch?
Refer to Publication 1128 R10.
Where can I get load shed signals?
A load shed feature also known as accessory 30A or 30B is an add-on
circuit that matches the generator capacity with the load.
It sends a signal to the ATS to transfer the load back to the alternate
source regardless of its availability. It can be signaled by a removal of a
voltage or contact closure.
Where can I get pre and post transfer signals on the ATS?
A selective load disconnect feature is a control contact that sends a pretransfer and post transfer signal.
Where can I get switch position contacts?
Accessory 14 is an additional auxiliary contact to indicate switch
position. Two sets are standard (14A/14B).
Specify total number of sets if more are required.
Where can I send remote transfer signals?
Feature 17 or a “remote transfer to emergency feature” is a terminal
provision for a remote contact that closes to signal the automatic transfer
to emergency and stay in that position while the contact is kept closed.
The transfer switch will retransfer to normal if emergency fails and
normal source is available. Refer to diagram for example.
Where can I get source availability signals?
Accessory 18B/18G or source availability contacts are customer
contacts added as optional accessory for the ATS to indicate separate
source availability on utility/emergency source regardless of the switch
position. Refer to diagram for example.
Which breakers are tested with an ASCO transfer switch??
Refer to Publication 1128 R15 for tested breakers for ASCO switches.
How do I set the in-phase monitor?
What is the heat dissipation for transfer switch?
Operation
Can I adjust the sensing of the controller?
Yes. Refer to the adjustments listed below (Refer to the Group 5 User’s Guide for more information)
How do I change the password?
To change the password, follow the steps below.
1. Go to the Group 5 controller and press the
ESC button until the display shows
Normal OK
Load on Normal
(with normal power available and the load
connected to normal)
SETTINGS
2. Press Enter/Save Settings. Then press
Menu Scroll until the display shows
3.
Press Enter/Save Settings. Then press
Menu Scroll until the display shows
General
Change
Password:
1111
4. If the password below shows “****”, you’ll
need to set DIP switch actuator no. 10 to
“Yes” first, before you can change the
entry.
5. Press Enter/Save Settings and change
the entry using the Increase Value
buttons. Press Enter/Save Settings to
save the entry.
6. After saving the entry, set actuator no. 10
back to “No” to enable the password.
How do I perform a transfer test?
To perform a transfer test, just flip the momentary switch to transfer test
position and hold it for 15 seconds, or until the switch actually transfers
over
.
How do I set the transfer time delays?
1.
1.Go to the Group 5 controller and press the
ESC button until the display shows
Normal OK
Load on Normal
(with normal power available and the load
connected to normal)
2. Press Enter/Save Settings. Then press
Menu Scroll until the display shows
3.
Press Enter/Save Settings. Then press
Menu Scroll until the display shows the
time delay you want to adjust
4. Press Enter/Save Settings and change
the entry using the Increase Value
buttons. Press Enter/Save Settings to
save the entry.
SETTINGS
Time Delays
TD NormFail:
TD N>E:
TD EmrgFail:
TD EngCool:
min
min
min
min
s
s
s
s
How does the ATS work?
The ATS works like a conventional open transition transfer switch. The
transfer switch main contacts moves in a quick break - before make
mode transition. There is no momentary parallel connection of the two
sources and no extended center-off position during transfer. The
transition is quick. The ATS controller monitors the voltage and
frequency of the two sources (upon re-transfer or any transfer between 2
“live” sources) and ensures that they are in-phase before the load is
transferred (if enabled).
How does the engine exerciser work?
The ATS works like a conventional open transition transfer switch. The transfer switch main contacts moves
in a quick break - before make mode transition. There is no momentary parallel connection of the two
sources and no extended center-off position during transfer. The transition is quick. The ATS controller
monitors the voltage and frequency of the two sources and ensures that they are in-phase before the load
is transferred.
How does the generator to generator ATS work?
For generator to generator Automatic Transfer Switch (ATS), we offer two accessories, accessory 111A
and accessory 111B. Kindly see below the details of the two accessories:

Accessory 111A
Where loads are highly critical, it may be necessary to have the double backup of two emergency
sources. Thus, if one doesn't start, is slow starting, or fails, the other one will start and carry the
load. The controls in this system keep the load connected to the normal source, usually a utility, as
long as it is adequate. If the normal source fails or drops below acceptable levels, the controls start
both engine generator sets. The first to produce acceptable voltage and frequency is selected by
A'TS 1. If the first engine generator set operates properly after a pre—set period, the other set is
shut down; it will be started up and put on the line if the first one fails at any time during operation.
When normal power is restored, the load is retransferred to normal by the main ATS 2.

Accessory 111B
To meet increased demands for continuous reliable electric power, many installations are being
supplied with on-site power generation. Prime power is also used where no utility power is
available. This automatic transfer system is for use in a two-engine prime power application. It is
similar to a standard emergency power transfer system, except both sources are engine-generator
sets. Each generator is sized to supply the total load. Generally the EG sets are alternated on a
weekly basis. Thus, the idle set can be serviced easily. Changeover from one set to another can be
initiated manually or automatically. The controls in this system keep the load connected to the
preferred generator, as long as it is adequate. If the preferred generator fails or drops below
acceptable levels, the controls start the other engine generator set. When it produces acceptable
voltage and frequency it is selected by the ATS and the load is transferred. When the preferred
generator is restored, the load is retransferred to it and the other generator is shut down after a
cooldown period.
Others
Blanks (108 calls)
How to contact a service tech (19 calls)
To contact a service technician dial 1-800-800-ASCO (2726) option 1
Literature Request (25 calls)
Click here to view the literatures.
Parts Inquiry (2 calls)
For parts inquiry you may log on at http://www.ascoparts.com/ or dial 1800-800-ASCO (2726) option 22
Warranty Inquiry (4 calls)
For warranty inquiries, please refer to the standard Warranty
published on the website or call 1-800-800-ASCO (2726) option 23. (For
after sale issues, be sure to take note of the serial no. and catalog no.,
for a faster response.) Or contact your local distributor.
Product Installation
Can the ATS switch between different voltages? (4 calls)
No. The ATS is designed to get the supply from the source that the
transfer switch is connected to. The switch should get the same voltage
coming from Normal and Emergency since the same supply is fed to the
solenoid operator (which has a specific voltage rating). This is the
standard design of a 7ATS. If the switch is to be installed on a facility
with different voltage supplied from Normal and Emergency, a
customized design can be done on the factory to meet this requirement.
If it is pre-sale application, contact Application Engineering at 1-800-800ASCO (2726) option 32. If its post sale application, contact ASI at 1-800800-ASCO (2726) option 23.
How do I configure the ATS controller? (6 calls)
The controller configuration depends on the specifications of the
switch. Once you’ve verified the specification based on the Bill Of
Materials (BOM), Catalog no. or Serial no., then you may refer to the
Group 5 User’s Guide for the corresponding adjustments.
How do I install an ATS? (12 calls)
To install the ATS you just need to follow the installation procedures on
the Operator’s Manual and the Outline and Mounting Diagrams.
Operator’s Manual
AMPS
7ATB Manual Numbers
150 - 400
600 - 1200
1600 - 3000
4000
381333-130B (239Kb)
381333-193B (946Kb)
381333-132C (357Kb)
381333-133A (488Kb)
Outline and Mounting Diagrams
Product Type
7ATS, 7NTS
Open Type
& Enclosed
(Type
1/3R/12/4)
with or without
Overlapping
neutral pole
Design Frame Size
Series
amps
30-230
30-230
Outline Type
Drawing
Open Type
Enclosed (Type 1)
719687-001
719687
30-230
Enclosed (Type 3R, 4, 12)
719687-002
30-230
Secured Enclosed (Type 3R, 4, 12)
623188-011
30-230
30-230
260-400
260-400
150-600
150-600
150-600
260-400
260-400
Enclosed (Type 1, Acc. 35, 7MTS)
Open Type (Acc. 35, 7MTS)
Open Type
Enclosed (Type 1)
Enclosed (3R, 12)
Secured Enclosed (3R, 4, 4X, 12)
Enclosed (Type 4, 4X)
Open Type (Acc. 35, 7MTS)
Enclosed (Type 1, Acc. 35, 7MTS)
Enclosed (Type 3R, 4, 12, Acc. 35,
7MTS)
Open Type
Enclosed (Type 1)
Enclosed (Type 1)
Enclosed (3R/12)
Secured Enclosed (3R, 4, 4X,12)
Enclosed (Acc.35 & 7MTS)
Open Type
Enclosed (3R, 4, 12) Front Connected
Secured Enclosed (Type 3R) Front
Connected
Secured Enclosed (Type 3R) Rear
Connected
Enclosed (Type 1) Front Connected
Enclosed (3R/12) Front Connected
Secured Enclosed (Type 3R) Front
Connected
Enclosed (Acc.35 & 7MTS) Front
Connected
Open Type
Open Type Front Connected
Open Type (Acc. 35, 7MTS)
Open Type (Acc. 35, 7MTS)
Enclosed (Type 1) Rear Connected
Enclosed (Type 1) Front Connected
Enclosed (Type 1) Front Connected
(Acc. 35, 7MTS)
Enclosed (Acc. 35, 7MTS)
Enclosed (Type 1)
Enclosed (Type 1) Rear Connected
Open Type
Secured Enclosed (Type 3R)
Open Type (Acc. 35, 7MTS & 28)
719687-003
719687-007
780142
780145
780147
780148
780149
621165-004
621165-002
D
J
E
260-400
J
H
G
600
600
600-1000
600-1000
600-1000
600-1000
600-1200
1000-1600
1000-2000
1000-2000
1200
1200
H
1200
1200
1000-2000
1000-2000
1000-2000
1000-2000
1000-2000
1000-2000
G
1000-1600
1600-2000
3000
3000
3000
3000
3000
623188-002
780143
780146
713200
713200-004
713200-008
713200-003
713200-002
619586-002
609798-006
609798-003
713201
713201-004
713201-005
713201-003
619590
609589
619590-001
619590-002
619587
619586
619413-001
619587-001
725400
725400-009
725400-001
725400-003
725400-002
What is the maximum length of control line run?
The maximum length of control line run depends on what type
and size of control wire is used. The NEC requirements still rule on this
case.
Where can I get the weight and dimensions of the ATS? ?
Click here to get the standard shipping weights of the ATS. For more
detailed info, refer to the Outline and Mounting Diagrams
What size of cable or wire can I use for the power connections of
the ATS?
Click here for the recommended wire sizes. You may also refer to the
Outline and Mounting Diagrams for more information.
When do I need to connect the neutral?
You need to connect the neutral if:

If it is required by the local code on the installation.

If the ATB is switching line to neutral loads.

If the transfer switch is installed for service entrance.
NOTE: The local code requirement should always be followed in this case.
Where can I get dimensions of the ATS?
Click here to view the standard dimensions of the ATS. Refer to
the Outline and Mounting Diagrams for more information.
Service
Can I modify the voltage rating of the ATS?
To modify the voltage rating of the ATS, you’ll need to replace the coil kit
and set the factory jumpers of the control panel
How can I convert an ACTS to an ATS?
Need to confirm first with Bhavesh
How can I extend feature 1C timer?
You can extend the time delay before engine start by purchasing an
accessory 1G. The feature needs to be set-up by an ASI technician.
How can I re-wire my power manager connections?
Just follow the wiring diagram attached on the Power Manager’s
Operator’s Manual.
How do I contact a service technician?
Call 1-800-800-ASCO (2726) and choose option 2 then 3.
How do I convert an ATS to an ADTS?
This is not possible on the field. You may have the switch shipped to the
factory for the modification or you may opt to just replace the ATS for
practical reasons.
How do I convert the ATS from 1Φ to 3Φ?
To convert the ATS from 1Φ to 3Φ you’ just need to follow the instruction
below (Applicable only if they have a 3 pole ATS)
How will I know if the controller is damaged?



If the display doesn’t work.
If there are extensive signs of burns on the PC board.
If the OP and NR relays are damaged.
Is the clock of the engine exerciser accurate?




The engine exerciser clock is fairly accurate. If the generator exercises out of schedule check the
following:
Verify on the event log that the event recorded was an engine exercise.
The PRESENT DATE/TIME setting under the engine exerciser menu should be synchronized with
the present date and time?
The event of engine exercise should fall within any of the enabled P1 to P7 settings?
The generator shouldn’t have its own exerciser program.
After checking all of the above and the problem is still there, contact an ASI service technician.
What does this alarm message mean?
Below are the definitions of the alarm messages that pop-up on the controller display.
What should I do if the indicator lights are faulty?








Check the wires to the door controls for any signs of burns.
Check if there is voltage across the pilot lamp terminals.
If there’s no supply, disconnect the gray plug on J10 of the Group 5 PC
board and reconnect it again to ensure proper fitting.
After this check again if the supply to the pilot lamp.
It there is voltage across the pilot lamp terminals, then order a
replacement door mounted control. If there is none, then check the
control panel for possible errors.
Check if there is correct voltage reading on the group control panel.
Check the readings with the voltage rating of the ATS.
If there’s none, check the voltage across the lugs. If there is correct
voltage is supplied, then check the harness. If it’s not the harness then
the problem is on the controller.
Why won't the ATS retransfer to normal?








The ATS won’t retransfer to normal if:
Normal is unavailable
The retransfer to normal inhibit is activated. (Check the wiring diagram
for feature 34A terminals. The jumper could be loose or disconnected)
The solenoid operator is damaged.
Emergency source voltage is not correct.
The ATS has feature 6C and 6D enabled on the switch.
The time delay hasn’t lapsed yet.
Control panel error
Mechanical problem
Why won't the ATS start the generator?





The ATS won’t start the generator if:
There is incorrect wiring of the engine start.
The control wires are loose.
The generator is not set to auto.
There is an active alarm on the generator.
The NR relay failed (Control panel error)
Why won't the ATS transfer to Emergency?







The ATS won’t transfer to Emergency if:
Emergency is unavailable.
The Transfer to Emergency Inhibit is activated.
The Load Shed from Emergency feature is activated
The solenoid operator is damaged
The ER relay is damaged
The controller is damaged
There is mechanical failure.
Why won't the engine exerciser work?



The engine exerciser may not work properly if:
The Engine Exerciser settings are not configured properly (Refer to the Group 5 User’s Guide)
The Generator has a built-in engine exerciser
The Controller firmware needs to be upgraded
Why won't the generator shut-off?






The generator won’t shut-off if:
Normal is unavailable (Check if the right voltage is supplied on the
Normal lugs or if Normal Accepted light is ON)
The generator is in cool down mode. Wait until the cool down timer times
out.
The selector switch for manual engine start is set to run. Switch it to
AUTO.
The TS (AUX1) auxiliary contact for engine start is stuck-up. Contact a
service technician to calibrate the cam switches.
The NR relay is damaged. Replace the Group 5 controller.
There is a problem on the generator.
Wiring
Where can I get load shed signals?
You can get load shed signals through an Accessory 30A or 30B. If you
have this feature enabled on the ATS, the terminal connections would
look like figure 1.
Where can I get pre-transfer and post transfer signals?
You can get pre-transfer and post transfer signals from an accessory 31Z
(Selective load disconnect contacts) if the transfer switch came with the
feature. Refer to the transfer switch wiring diagram and it should look like
figure A (but not exactly the same). If you don’t have this feature on your
switch, contact an ASI technician so they can set-up the feature or call 1800-800-ASCO (2726) option 1.
Figure A. Selective load disconnect terminal connections
Where can I get source availability signals?
You can get source availability signals through an accessory 18B or 18G.
The terminal connection would look like the one shown on Figure B (but
not exactly the same). If you don’t have this feature installed on your
switch you may contact an ASI technician or 1-800-800-ASCO (2726)
option 1 to have it set-up.
Figure B. Acc. 18B and 18G source availability contacts terminal connections
Where can I get switch position contacts?
You can get switch position contacts from the Acc.14A and 14B
terminals. Refer to the transfer switch wiring diagram and the terminals
connections would look like figure C (But not exactly the same).
Figure C. Acc. 14A and 14B auxiliary contacts terminal connections
Where do I connect the engine start wires?
The engine start contacts are also known as feature 7 and 8.
Feature 7 – Contact the closes to send an engine start signal
Feature 8 – Contact that opens to send an engine start signal
Refer to the transfer switch wiring diagram for the terminal connections. To request for a wiring diagram just
take note of the Serial no., BOM no.
and the Catalog no. of the transfer switch and call 1-800-800-ASCO
(2726) option 33.
Where can I send remote transfer signal?
Feature 17 > Remote transfer to emergency.
Requires a customer supplied normally open contact. Closing of the contact causes engine start and
transfer to the emergency source. Opening of the contact activates the feature 3a (retransfer to normal)
delay prior to retransfer. In the event the emergency source fails while the transfer switch is connected to
emergency and the remote contact is closed, the transfer switch will retransfer to the normal source.
Connected to the field connections terminal block (TB).
Note: Please check your wiring diagram of your transfer switch as reference.