Troubleshooting
76
4-5-2 Troubleshooting for outdoor unit
If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER PCB.
No.
LED Display
Displayed
PCB Assy
Meaning Remarks Error Code
Red Green Yellow
-
MAIN/INVERTER
Normal operation
(MAIN : Indoor Outdoor : Green ON)
(INVERTER : MAIN PCB INVERTER PCB : Green
ON)
-
1
MAIN Hydro unit quantity is mismatched.
Check Hydro unit quantity
setting in outdoor
E201
2
MAIN/INVERTER
Abnormal state, no communication between
Indoor and Outdoor Main PCB
Check electrical
connection and setting
E202
3
4
MAIN/INVERTER
1min. Time out of communcation
error(Main Inverter)
Check electrical
connection and setting
E203
5
MAIN Outdoor temp sensor error
Check Outdoor sensor
Open/Short
E221
6
MAIN Cond. temp sensor error
Check Cond. sensor
Open/Short
E231
7
MAIN Discharge temp sensor error
Check Discharge sensor
Open/Short
E251
8
MAIN OLP Sensor Error
Check OLP sensor
Open/Short
E320
9
MAIN
Detection of Outdoor Freezing when Comp.
Stop
Check Outdoor Cond. E403
10
MAIN
Protection of Outdoor Overload when Comp.
Stop
Check Comp. when it start E404
11
MAIN
Discharge temperature of a compressor in an
outdoor unit is overheated.
E416
12
MAIN
Outdoor EEV
Open error
Check EEV E419
13
MAIN
Miss wiring error at
3Phase power source line
(Only 3Phase Model)
Check Power
Line-R,S,T,N
E425
14
MAIN
Gas leakage error
(Stop state)
Check Gas leak E439
15
MAIN
Heating operation is not available since the
outdoor air temperature is over 35°C.
Heating E440
16 Cooling E441
16
MAIN
Gas leakage error
(Before operating)
Check Gas leak E443
17
MAIN/INVERTER Outdoor unit BLDC Fan 1 or Fan 2 error
FAN1 error E458
19 E475
18
MAIN/INVERTER Comp. Starting error E461
19
MAIN Primary Current Trip error E462
20
MAIN Over current trip / PFC over current error Check OLP sensor E463
21
MAIN/INVERTER IPM(IGBT Module) Over Current(O.C) E464
22
MAIN/INVERTER Comp. Over load error E465
23
MAIN/INVERTER DC-Link voltage under/over error
Check AC Power or
DC_Link voltage
E466
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