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13. Installation
AF50MS3AF50MS3MCEEXHC, AF50MV3AF50MV3MCEEXHC
Troubleshooting
The table below give indication about self diagnostic routine. Some of error code requires activities exclusively for
Authorized Service Center.
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.
Displayed
PCB Assy
Meaning
Remarks
Error Code
-
MAIN/INVERTER
Normal operation
(MAIN : Indoor
↔
Outdoor : Green ON)
(INVERTER : MAIN PCB
↔
INVERTER PCB : Green ON)
-
1
MAIN
Unit quantity miss matching between indoor and
outdoor.
Check indoor 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
MAIN/INVERTER
1min. Time out of communication
error(Main
↔
Inverter)
Check electrical connection and setting
E203
4
MAIN
Outdoor temp sensor error
Check Outdoor sensor Open/Short
E221
5
MAIN
Cond. temp sensor error
Check Cond. sensor Open/Short
E231
6
MAIN
Discharge temp sensor error
Check Discharge sensor Open/Short
E251
7
MAIN
OLP Sensor Error
Check OLP sensor Open/Short
E320
8
MAIN
Detection of Outdoor Freezing when Comp. Stop
Check Outdoor Cond.
E403
9
MAIN
Protection of Outdoor Overload when Comp. Stop
Check Comp. when it start
E404
10
MAIN
Discharge temperature of a compressor in an
outdoor unit is overheated.
E416
11
MAIN
Heating operation is not available since the outdoor
air temperature is over 30 °C.
Heating
E440
Cooling operation is not available since the outdoor
air temperature is lower than -15 °C.
Cooling
E441
12
MAIN/INVERTER
Outdoor unit BLDC Fan 1 or Fan 2 error
FAN1 error
E458
FAN2 error
E475
13
MAIN/INVERTER
Comp. Starting error
E461
14
MAIN
Primary Current Trip error
E462
15
MAIN
Over current trip / PFC over current error
Check OLP sensor
E463
16
MAIN/INVERTER
IPM (IGBT Module) Over Current(O.C)
E464
17
MAIN/INVERTER
Comp. Over load error
E465
18
MAIN/INVERTER
DC-Link voltage under/over error
Check AC Power or DC_Link voltage
E466
19
MAIN/INVERTER
Comp. wire missing error
Check Comp. wire
E467
20
MAIN/INVERTER
Current sensor error
Check Outdoor Inverter PBA
E468