DVM PLUS III
COMMISSION
MANUAL
2008
SAMSUNG ELECTRONICS
TITLE
1. Direction of install & commission
2. Key parts of outdoor unit
3. Commission pre-check
4. Commission
5. Commission criterion
6. Trouble shooting use S-net
1. Direction of install & commission
1.1 Compatibility of outdoor and indoor unit
1.2 Check of outdoor pipe working
1.3 HR installation check
1.1 Outdoor and indoor compatibility
DVM PLUS III must be combined with AVX *** EE indoor units
DVM PLUS III can not combined with DVM PLUS II AVX *** EA, EB series indoor units
AVX *** EE
AVX *** EA
AVX *** EB
1.2 Check of outdoor pipe working
Requirements of outdoor pipe working
When the outdoor unit is installed with combination, outdoor joints always should be installed horizontally
Should be applied
all pipes
Not allow
Vertical installation
Min. 10cm
Min. 30cm
1.2 Check of outdoor pipe working
Requirements of outdoor pipe working
Should be applied u-trap as below when the combined two units distance over 2meters.
Height
200~300mm
Over 2meter
Only for Gas pipe
(HR low pressure gas pipe)
With in 1m
from the unit
1.2 Check of outdoor pipe working
Requirements of outdoor pipe working
In the case of there is height difference among outdoor units
Need to install U-trap
when the unit located in
the lowest position
Do not need to install
U-trap, when the unit located
in the height position
1.2 Check of outdoor pipe working
Summary of outdoor unit plumbing key points
1.2 Check of outdoor pipe working
Summary of outdoor unit plumbing key points
1.3 HR installation check
Among outdoor unit and MCU 3pipes should not be crossed install
MCU should be installed proper location that MCU working nose do not affect user’s comfort
Need to charge additional refrigerant: 0.5kg each MCU
Liquid
Low gas
High gas
High
Gas
Low gas
Liquid
High gas
Liquid
Low gas
Liquid
Low gas
2. Key parts of outdoor unit
2.1 Out door appearance
2.2 Control Box
2.3 Refrigerant pipe (HR)
2.4 Refrigerant pipe (HP)
2.1 Outdoor appearance
FAN MOTOR part
Refrigerant pipe part
Refrigerant pipe
Pressure and temp. sensor
Oil separator
Accumulator
valves
Service valve part
High pressure S/valve
Low pressure S/valve
Liquid S/valve
Oil balance S/valve
Outdoor FAN
BLDC FAN MOTOR
Discharge guard
FAN GUARD
CONTROL BOX
MAIN PCB
BLDC driver
CT sensor PCB
MAGNET SWITCH
Power/Communication Terminal
COMP & oil balance
DIGITAL compressor
Fixed compressor
Oil balance valve and sensor
2.2 CONTROL BOX
CONTROL BOX
Transmitter Ass’y
MAIN PCB
BLDC driver
CT sensor PCB
FILTER PCB
MAGNET S/W
Comm. terminal
Power terminal
2.2 CONTROL BOX
MAIN PCB
7-SEG’ LED
MICOM
BLDC connector
Comm. circuit
DOWN LOAD
TACT S/W
Detect 3phs
Power
EEV port
Sensor port
Valve port
Option setting
220V input
CT sensor
2.2 CONTROL BOX
MAIN PCB – DC part
20
2
3
4
1
5
6
19
7
8
18
15,16,17
12,13,14
11
#
Function
10
9
remarks
CT sensor PCB
connector
15
EVI EEV
9
High pressure sensor
16
MAIN EEV 2
Only for large
cabinet
Low pressure sensor
17
HR EEV
Only for HR
18
MAIN EEV 1
19
BLDC PCB connector
20
TRANS OUT
2
5V DC Power
3
Indoor
communication(F1,F2)
10
4
Outdoor
communication(OF1,OF2)
11
5
SUB MICOM Download
6
MAIN MICOM Download
7
Heat/cool selector
terminal
Micom
upgrade
Micom
upgrade
ACM-C200
remarks
8
12V DV Power
Transmitter
power
Function
Function
1
12
13
14
Out side temp. sensor
& SUMP temp. sensor
DISHC’ temp. sensor
& SUCTION temp.
sensor
Oil/ LIQ Tube/ COND
temp. sensor
EVI IN / EVI OUT temp.
sensor
remarks
#
#
2.2 CONTROL BOX
MAIN PCB – AC part
1
15
#
Function
14
13
12
11
Remarks
10
9
8
7
6
#
5
4
3
Function
1
Detect 3phase(R/S/T)
8
Compressor running signal
2
220V power input
9
HOT GAS By – Pass valve
3
#1/#2 compressor CCH
10
PWM valve
4
#3compressor CCH,
ACCUMULATOR CCH
11
4WAY valve
5
Oil balance valve # 1
12
MAIN EEV valve
6
Oil balance valve # 2
13
Main cooling valve
7
Oil balance valve # 3
14
EVI valve
15
LIQUID By - Pass valve
2
remarks
Only for HR
2.2 CONTROL BOX
BLDC PCB
#
6
1
Function
1
Trans output
2
Power output(220V)
3
Power input(220 V)
4
MAIN PCB signal connector
5
Motor control signal
6
Motor power
2
3
4
5
remarks
2.2 CONTROL BOX
FILTER PCB & CT sensor PCB
#
Function
3
1
2
1
Power input(220v)
2
Earth connection
3
Power output(220v)
4
Current sensor output
(Connect with MAIN PCB)
4
remarks
2.2 CONTROL BOX
2.6 Others
#
1
2
3
Function
Remarks
1
Compressor MAGNET switch
2
Indoor - outdoor communication
terminal
3
Communication terminal among outdoor Only for Combination
unit
outdoor
4
220V power input
3p 3wires 380V supply
5
380V power input
3p 4wires선 380V
supply
6
Earth terminal
6
4
5
Should connected with
only main outdoor
2.3 Refrigerant pipe (HR)
Refrigerant pipe
5
6
4
3
2
#
7
8
1
Function
remarks
1
PWM valve
Capacity control
2
HOT Gas Bypass
valve
3
EVI Bypass valve
Close when Vapor Injection
applied
4
4WAY valve
Select cool and heat
5
HR EEV
Refrigerant flow control
between outdoor and
indoor when main heating
mode
6
Main cooling valve
Supply hot gas to heat
mode indoor unit when
main cooling mode
7
Liquid Bypass valve
Prevent compressor over
heat
8
EVI EEV
Control sub-cool rate and
vapor injection amount to
the compressor
2.3 Refrigerant pipe (HR)
Refrigerant pipe
4
6
5
3
2
1
7
#
Function
remarks
1
High pressure switch
Safety device for
High pressure
2
Turbo Intercooler
Sub-cooling
device
3
High pressure sensor
High pressure
sensing
4
EVI out temp sensor
EVI EEV control
5
Compressor suction
temperature sensor
6
Refrigerant changing
port
Refrigerant
changing port for
heating mode
7
Low pressure sensor
Low pressure
sensing
2.3 Refrigerant pipe (HR)
Compressor and service valve part
4
5
6
3
1
#
Function
1
Oil valve
Oil balancing
valve
2
Oil temperature sensor
Oil temperature
sensing
3
MAIN EEV
Refrigerant flow
control in
heating mode
4
COND_OUT temp sensor
5
Liquid service valve
6
High pressure gas service
valve
7
Low pressure gas service
valve
8
Oil pipe service valve
9
Outdoor temp sensor
7
9
8
2
remarks
2.3 Refrigerant pipe (HR)
Refrigerant pipe parts
#
9
1
2
Function
EVI valve
Liquid by-pass valve
10
3
14
15
7
12
5
11
3
1
8
2
4
6
13
4way valve
4
EVI EEV
5
Hot gas by-pass valve
6
PWM valve
7
Compressor discharge
Check valve
8
EVI out temp. sensor
9
High pressure sensor
10
Outdoor fan motor
11
High pressure switch
12
Accumulator
13
Oil separator
14
Sub cooler
15
Suction temp. sensor
remarks
2.4 Refrigerant pipe (HP)
Compressor and service valve
#
1
Function
Low pressure service valve
7
2
6
3
8
Condenser out temperature
sensor
5
MAIN EEV
6
Refrigerant changing port in
heating mode
7
Low pressure sensor
8
Compressor discharge
temperature sensor
9
Oil valve 1,2,3
10
Oil valve temperature sensor
11
Compressor oil temperature
sensor
12
Compressor crank case
heater
4
10
1
5
3
11 12
Oil balance service valve
4
9
2
High pressure service valve
Remarks
3. Commission pre-check
3.1 Commission procedure
3.2 Power on and communication check
3.3 S-net set-up
3.4 Mi-com upload (If necessary)
3.1 Commission procedure
Prepare commission
commission
Judge commission
Installation check
Run Refrigerant amount judge mode
Commission report
Prepare pre-check Sheet
Run pipe crossing check mode
Explain to customer
Power on
Cool mode commission
S-net 1+ set-up
Heat mode commission
Mi-com upload if necessary
Commission of HR
Save S-net Data
Finish commission
• Outdoor unit, indoor unit and pipe working check following by check sheet.
• If there are existed failed parts, It should be modified before commission
• Commission as follow Cool/heat commission mode and acquire S-net data.
• It should be done plumbing check mode for HR unit.
• Explain to the customer
3.2 Power on and communication check
Power on
Indoor and outdoor
Should be check electronic wire connection
status before power on, especially RST and
N connection in main power, and power on
6hrs before for commission
Indoor and MCU: 2wires(220V) c/breaker ON
Outdoor:4wires(380V) c/breaker ON
Power check
Check input outdoor unit voltage use
[ Communication check in MAIN unit ]
voltage checker:
(R-S/S-T/T-R-380V, R-N-220V)
Indoor unit voltage: 220V
Communication check
There is no communication error you can see
Ch on the PCB display
[ CH display on the PCB ]
3.3 S-net set-up
S-net connection
Serial type laptop
USB type laptop
USB port
connection
SERIAL port
connection
Communication
connect
(F1,F2)
Converter power
(Mouse port)
Communication
connect
(F1,F2)
Communicaion(F1,F2) : Connect with out door unit or indoor unit terminal block
USB driver should be installed for USB type S-NET 1+
Do not need to power supply for USB type converter
3.3 S-net set-up
Running s-net
Running S-net 1+
Input site information
Running S-Net 1+ (program version: 3.33.40)
Input site information
Main picture of S-net 1+
3.3 S-net set-up
System set-up
Choose outdoor unit type
Choose com port
Com port set-up error
Choose DVM Plus III unit type
Choose proper port, Baud rate to 9600bPs
If there are wrong set-up on port and baud rate, then snet1+
can not work properly.
3.3 S-net set-up
Snet 1+ log on status check
Select pc -> set
And click Connect
Looking indoor and outdoot units
install status display
If snet1+ log on OK, then there are
display ODU/IDU data on the screen
Otherwise change com port and
Baud rate setup and try again.
3.3 S-net set up
Unit controller and display data
Indoor unit controller at Tool
Indoor unit cycle data
MCU DATA : Only for HR type unit
3.3 S-net set up
Snet data back up
Select setting at Backup
Chick OK
Default back up folder
C:\Program
files\Samsung\Snetpl
us\Backup
3.3 S-net set up
Check back up data status
Defaulted built up folder at C:\Program Files\Samsung\SnetIplus\Backup
As follow data back up stating time
Indoor, Outdoor cycle data
back up as Excel type file
3.3 S-net set up
Communication data back up
IF want to communication data back-up for data simulation
Click tool >comm.Viewer
3.3 S-net set up
Communication data back up
Click Viewer start button
then there are display
communication data
Click back up sim. file start
button
=> data file saved at
C:\Program
Files\Samsung\SnetIplus
\Backup folder
as txt form file
3.3 S-net set up
View communication back up data in simulation mode
3
4
Click file open button
2
Select rawdata that want to
simulation
Select simulation
Click Connect
1
Adjusting Simulation speed
Ex) 3 →3times speed
3.3 S-net set up
View communication back up data in simulation mode
Simulation that saved while commission
3.3 S-net set up
System mi-com version information
If you want to check outdoor and indoor units mi-com version, then click H/W info .
3.4 Mi-com upload if necessary
Connect converter to laptop
SERIAL PORT laptop
laptop
SERIAL port
wire
connect with upload converter
PCB connector
Upload
converter
3.4 Mi-com upload if necessary
Mi-com upload procedure
1. Outdoor PCB power off
2. Hookup upload
connector and power on
3. Separate connector
from PCB
CN 91 Main
Reassembly
Separate
connector
• Separate connector from PCB
• Hookup converter upload
as above picture then PCB
• Do mi-com upload
connector to the outdoor PCB
power can be blocked
• Separate connector from
for mi-com upload
PCB after mi-com upload
• Assembly power connector to
then reassembly
the outdoor PCB for POWER
ON
3.4 Mi-com upload if necessary
RUN MI-COM UPLOAD PROGRAM
RUN GMAN.EXE FOR MI-COM UPLOAD(NEED TO DOWNLOAD PROGRAM BEFORE)
3.4 Mi-com upload if necessary
Basic set-up
Select com port, speed, unit type (indoor or outdoor) that need to be uploaded
COM PORT should be set up that the converter hooked up, speed always select 1152000bps.
3.4 Mi-com upload if necessary
Select upload law file from the folder
Select proper law file (DB-XXXXA.hex) by click Select File. Law file should be acquired before
Click Download
2
1
3.4 Mi-com upload if necessary
Conform upload status
While uploading there is indicated uploading status as below
There is displayed a message that upload finished successfully.
3.4 Mi-com upload if necessary
When failed upload
Check wire connection and setup status then try again
Still display as like below then check upload converter and wire status
4. commission
4.1 commission key mode
4.2 main check items and check sheet
4.3 fill out installation information
4.1 Commission key-mode
As follow commission key-mode, please push proper button on the outdoor PCB
Push K3 button can stop commission
Save snet data Print screen each after 30min and 1hour
Acquire S-net raw data by data back up function
For HR unit, it should be performed plumbing cross check function mode before commission.
Push #
Key mode
Function
K1
2times
Heating commission oded(K2)
Heating commission mode run
K2
2times
Cooling commission mode(K6)
Cooling commission mode run
K1
K2
Push #
K2
4times
Key mode
Plumbing cross check mode
(PIPE)
Function
Plumbing cross check as follow each
indoor unit run by cooling mode.
K2
Push #
K2
5times
Key mode
Function
Refrigerant amount check
mode (K9)
Does it proper refrigerant amount in
the system
K2
4.2 Main check items and check sheet
사전 점검
Outdoor and indoor unit check sheet
Need to check outdoor/indoor/controller function check
Check by following check sheet, if there exist NG part. It should be properly modified
Main check point
 Out door check
 Indoor check
 In/out door power check
 Controller check
4.3 Fill out installation information card
Individual run of indoor unit and fill out installation card
1
< Individual run >
Check each in door unit by individual run
Stop commission mode and run
individually by remote controller
After 30min., save SNET DATA
2
< installation card >
Fill out installation information card
card that attached in control box area
Fill out Installer information
Plumbing length, extra charged refrigerant
amount etc.
3
< Finish commission >
1. Check EEV close that stopped unit
2. Plumbing cross check for EEV KIT
5. Commission criterion
5.1 S-net main picture
5.2 Refrigerant amount check
5.3 Plumbing cross check
5.4 Commission condition
5.5 Cooling commission criterion
5.6 Heating commission criterion
5.7 HR commission criterion
5.1 S-net main picture
S-net 1+ main
A: Comp, valve ON/OFF information
C: Outdoor unit main cycle data
D: Indoor unit main cycle data
E: MCU DATA – only available for HR
B: Site information
5.1 S-net main picture
Compressor, Valves ON/OFF information
When the compressor on there is indicated red
When valves and CCH on there is indicated red
Item
Explain
UNIT 1
Outdoor unit 1
UNIT 2
Outdoor unit 2
UNIT 3
Outdoor unit 3
UNIT 4
Outdoor unit 4
Item
Explain
Item
Explain
CP 1,2,3
Compressor 1,2,3
CCH 1,2,3
PWM
PWM valve ON/OFF
LBY
LIQUID BY-PASS valve
4WAY
4WAY V/V (ON in heat)
Error
information
Indoor, Outdoor error
information
OB 1,2,3
H/G
Oil balancing valve
HOT GAS valve
Compressor crank case heater
5.1 S-net main picture
Site information
Installed outdoor and indoor unit quantity information
Inputted site information: Field, model and S/N
In cooling mode
Item
Heat rate
HR mode
Explain
Heating mode running rate in HR unit
5.1 S-net main picture
Items
Outdoor unit main DATA
Explain
Out temp
Outside temperature
H.Press
/L.press
High/low pressure in each unit
Can check outdoor unit main cycle data
Dis. 1,2,3
Can check outdoor unit cycle data grape
Sump.1
Compressor discharged refrigerant
temperature in each compressor
Compressor 1 oil temperature
CT 1,2,3
Compressor running current in each
compressor
Cond out
Condenser out temperature
Suction
Compressor suction temperature
sensor
D_tube
Sub cooler out temperature
capa
Indoor unit running capacity
EEV
EEV open grade in heating mode
EVI_EEV
FAN
EVI EEV open grade
Outdoor Fan STEP
EVI IN
EVI in temperature
EVI OUT
EVI out temperature
HR EEV
Refrigerant flow rate control in HR
unit
COOL
Main cooling valve on/off
EVI
EVI valve on/off
ACCUM
ACCUMULATOR CCH on/off
OD EEV
EEV sol valve on/off
5.1 S-net main picture
Indoor unit main DATA
Display indoor unit in/out temperature and EEV open grade
Item
explain
Capa.
Indoor unit capacity
(Variable depending on heat load)
Mode
cool/heat/fan/ mode
Speed
Fan speed
Set temp
Setting temperature
Intemp
Room temperature
EVA IN
Evaporator inside temperature
EVA OUT
Evaporator outside temperature
EEV
EEV open grade(0 ~ 480STEP)
5.1 S-net main picture
MCU main data (only available for HR)
Can check each MCU’s port and address
Can check each MCU’s running mode, indoor mode, valve on/off
MCU Liquid Bypass valve ON/OFF, Hot Gas Bypass valve ON/OFF
heating EEV and sub-cool EEV open grade
MCU sub-cooler IN-OUT temperature
Item
explain
MCU Addr.
MCU Address
MCU oper.
MCU operation mode
A,B,C,D,E,F port
LBV
Indoor unit address and running mode
Prevent refrigerant stack and evaporator freezing
EEV 1
Refrigerant flow control between outdoor unit and indoor
unit in main heating mode
EEV 2
Refrigerant sub cooling control that flow inside MCU
5.2 Refrigerant amount check
Refrigerant amount check mode
It should be performed before commission
This mode only acceptable in the case of out side temperature above 10℃
Push#
K2
5times
Title
Refrigerant amount check
(K9)
Function
For checking refrigerant amount proper or
not
K2
Click refrigerant amount check
Need to run more than 30min.
5.2 Refrigerant amount check
Refrigerant amount check mode
Choose outdoor type
Click analysis button
check procedure finish 100%
then check refrigerant amount
90~110%
Then ok
5.3 Plumbing cross check
Plumbing cross check mode
For HR unit, it should be performed plumbing cross check function mode before commission.
In plumbing check mode, there is displayed 7 SEG’ LED as like below
5.3 Plumbing cross check
Plumbing cross check mode error
If there is occurred error, while plumbing cross check mode. Check as below
Error code
Error information
E210
Communication error between outdoor unit and MCU over 2min.
E214
Installed MCU quantity setting error in outdoor unit. MCU address redundant
E215
Address miss matching between Indoor unit and MCU
E216
MCU connecting port setting error that there is not connected indoor unit (should not set ON)
E217
MCU connecting port setting error that there is connected indoor unit (should set ON)
E218
Setting indoor unit quantity miss match between MCU and actual installed indoor unit quantity
5.4 Commission condition
Cooling
Running condition and time
Out side and room temperature
. Run by cooling commission mode over 1hr,then
judge snet data
. Outside temp.: 21℃ ~ 43℃
. Room temp.: 15℃ above
. Check EEV closing status by individual mode
※ over these condition, then commission criterion
subject to vary
Heating
Running condition and time
. Run by cooling commission mode over 1hr,then
judge snet data
. Check EEV closing status by individual mode
Outside and room temperature
. Outside temp.: 0℃ ~ 20℃
. Room temp.: 24℃ below
※ over these condition, then commission criterion
subject to vary
※ For HR unit, it should be performed plumbing cross check function mode before commission.
※ That installed EEV KIT indoor unit (like wall mounted), It should be done individual commission one by one
5.5 Cooling commission criterion
S-NET key check points
Out door unit
• High/Low pressure
• Comp. discharge temp
• cond out temp.
• Sump
• CT sensor
Indoor unit
• EEV open grade
• EVA IN temp.
• EVA OUT temp.
• room temp.
5.5 Cooling commission criterion
Check point 1 compressor discharge temp.
Running compressor discharge temp. : Between 60℃ ~ 110℃ then OK
below 60℃ then refrigerant over charging, over 120℃ then vacuum fail or refrigerant lacking
5.5 Cooling commission criterion
Check point 2 : Condenser outside temperature (COND OUT)
higher than out side temperature 3℃~20℃ then OK
(Condition: outside temperature over 0℃, room temperature over 15℃)
5.5 Cooling commission criterion
Check point 3 : SUMP temperature
higher than out side temperature 3℃~30℃ then OK
(Condition: outside temperature over 0℃, room temperature over 15℃)
5.5 Cooling commission criterion
Check point 4 : CT sensor
Running compressor CT sensor
Depending on compressor type
- ZPD 83 compressor : 5~15A
- ZPD 72KC compressor: 5~12A then OK
Check compressor if it exceed above limit over 3A
5.5 Cooling commission criterion
Check point 5 : indoor unit EEV open grade and EVA IN-OUT temperature
EEV open grade from 90 to 350 STEP, then OK
If there are 80% of indoor unit’s EEV over 350STEP then might be refrigerant shortage
EVA IN temp – EVA OUT temp: ±1℃ then OK
IN temp – EVA IN /OUT temp: over 10℃ then OK
5.5 Cooling commission criterion
Snet data sample
INDOOR
OUTDOOR
5.6 Heating commission criterion
Snet key check points
Out door unit
• High/Low pressure
• Comp. discharge temp
• cond out temp.
• Outdoor unit EEV open grade
• CT sensor
Indoor unit
• EEV open grade
• EVA IN temp.
• EVA OUT temp.
• room temp.
5.6 Heating commission criterion
Check point 1: compressor discharge temp.
Running compressor discharge temp. : Between 60℃ ~ 110℃ then OK
below 60℃ then refrigerant over charging, over 120℃ then vacuum fail or refrigerant lacking
5.6 Heating commission criterion
Check point 2: condenser out temp. (Cond out) / Suction temp.
COND OUT: lower than out side temperature at least 1℃
(SUCTION temp – Saturation temp (low pressure+1kgf/㎠ saturation temp) ) = 0℃~+7℃ OK
- lower than 0℃ : out door EEV open error, refrigerant over changing
- higher than 7℃: outdoor EEV closing error, lack of refrigerant
포화pressure
압력 그래프graph
Saturation
35.0
pressure
압력(kgf/㎠)
30.0
25.0
20.0
15.0
(7.4kgf/㎠,-3℃)
10.0
5.0
0.0
-30
-20
-10
0
10
20
온도(℃)
Temp(℃)
30
40
50
5.6 Heating commission criterion
Check point 3 : CT sensor
Running compressor CT sensor
Depending on compressor type
- ZPD 83 compressor : 5~15A
- ZPD 72KC compressor: 5~12A then OK
Check compressor if it exceed above limit over 3A
5.6 Heating commission criterion
Check point 4: Outdoor EEV open grade
Proper open grade : 400~1200STEP
it’s only reference valve
5.6 Heating commission criterion
Check point 5 : Indoor unit cycle data
EVA OUT temperature : 50 ~ 85℃
it should lower than compressor discharge temperature (conform that there is no egisist discharge
temperature sensor insulator separation)
EVA IN temperature : 35 ~ 50℃
EVA OUT temperature – IN temp: over 15℃
Indoor unit diffuser temperature: over 40℃
5.6 Heating commission criterion
Snet data sample
INDOOR
OUTDOOR
5.7 HR commission pre check
HR unit
HR unit commission procedure same with HP cooling and heating mode.
In main cooling/heating mode, it’s very variable for commission criterion. Therefor mainly
check MCU working.
5.7 HR commission pre check
Check point 1: Running mode and MCU status check
Main cooling mode that Heat rate is 45%
Detail Oper: Mixted operation
Does it same between indoor Address and MCU Address?
Heat and cool valve ON/OFF properly depends on
indoor unit mode
5.7 HR commission pre check
Check point 2: Indoor unit operating information
Super heat(Evain-Eva out) are variable depending on out side temperature, room temperature and Heat rate.
therefor indoor unit EEV open grade/EVA IN/EVA OUT temperature just reference value in main
heating/cooling mode.
6. Trouble shooting use S-NET
6.1 Low pressure sensor error
6.7 Service valve open error
6.2 High pressure sensor error
6.8 Refrigerant shortage (Cooling)
6.3 Indoor EEV open error
6.9 Refrigerant shortage (Heating)
6.4 Indoor EEV close error
6.10 4WAY V/V leakage
6.5 E410 error
6.11 EVI IN sensor is separated
6.6 Communication wire crossed
6.1 Low pressure sensor error
SNET
Status
Check
procedure
• Three units low pressure should be same, but Fixed 1 unit’s low pressure reading value differ
from others
• Change low pressure sensor
 Changing it system pressure normal
• Service valve was not opened  Service valve open check
6.2 High pressure sensor error
SNET
Status
Check
procedure
• Three units high pressure should be same, but Fixed 3 unit’s high pressure reading value differ
from others
•Change high pressure sensor
 After changing it system pressure become normal
6.3 Indoor EEV open error
SNET
Status
Check
procedure
• Display E152 on indoor error information
• Even though EEV in 170STEP OPEN, but there is no temperature change EVA IN and EVA OUT
• EEV clogged: 1)EEV coil separated 2)EEV connector separated 3)EEV Niddle clogged
• Plumbing pipe clogged: 1)check liquid side pipe clogging
6.4 Indoor EEV close error
SNET
Status
Check
procedure
• Even though indoor unit running fan mode (EEV cosede:0STEP) EVA IN/OUT temperature are still low
• Because of EEV close error refrigerant pass through ,therefor there are temperature change
• EEV failed: 1)EEV coil separated 2)EEV connector separated 3)EEV Niddle clogged
6.5 E410 Error
SNET
Status
Check
procedure
• Occurred Low pressure protection error(E410)
• There are two cases. One is all unit’s pressure low, the other is one unit’s pressure low
• one unit’s pressure low : 1)Low pressure sensor reading fail  Replace low pressure sensor
• All unit’s pressure low
: 1)Lacl of refrigerant (leakage) 2)low pressure S/Valve unopened
6.6 Communication cable cross
SNET
Status
• After starting outdoor unit, system low pressure going down around 1.1kgf/㎠
•Indoor unit’s EEV opened
170STEP, but there are no temperature variation in EVA IN and EVA OUT
• Service valve unopened  Service valve open
Check
procedure
• There are installed lots of outdoor unit in the same place, Between plumbing line and
communication cable crossed  Check pipe and communication cable crossing
6.7 Service valve un-opened
SNET
Status
Check
procedure
• After starting outdoor unit, system low pressure going down around 1.3kgf/㎠
• Service valve unopened  Service valve open
• Low pressure sensor reading fail  Replace low pressure sensor
6.8 Lack of refrigerant (Cooling)
SNET
Status
Check
procedure
• More than 80% of indoor unit’s EEV full opened(480STEP)
• Compressors discharge temperature are over 100℃
• Is there any mistake to calculate additional refrigerant by plumbing length ?
And conform charging amount  Recharging proper amount of refrigerant
6.9 Lack of refrigerant (Heating)
SNET
Status
Check
procedure
• Compressors discharge temperature are over 100℃
• Is there any mistake to calculate additional refrigerant by plumbing length ?
And conform charging amount  Recharging proper amount of refrigerant
6.10 4WAY valve leakage
누설발생
• While running compressor low pressure and high pressure values are almost same
SNET
Status
• Compressor suction temperature increasing
• Outdoor EEV full open as decide thatlack of refrigerant
Check
procedure
• In heating mode, 4way valve sealing filed. Therefore discharged refrigerant directly return to
the compressor suction line.  4way valve compressor suction line temperature check: Does it hot
then change 4way valve
6.11 EVI IN is separated
SNET
Status
• EVI IN temperature higher than EVI OUT temperature
Check
procedure
• EVI IN sensor is separated from the proper location