Troubleshooting
50
Samsung Electronics
4-4-2 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
Off
Blink
On