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.
Priority Error number Explanation
1 E471 Outdoor unit EEPROM Read/Write error (H/W)
2 E470 Outdoor unit EEPROM Read/Write error (Option)
3 E202
Communication error between indoor unit and outdoor unit (When there is no response from indoor
units after tracking is completed)
4 E201
Communication error between indoor unit and outdoor unit (Pre tracking failure or when actual
number of indoor units are dierent from the indoor unit quantity setting on the outdoor unit)
5 E203
Communication error between outdoor unit inv - main micom
(For PF #4~#6 controller, error will be determined from the time when compressor turns on)
6 E108 Error due to repeated communication address
7 E221 Error on outdoor temperature sensor (Short or Open)
8 E251 Error on discharge temperature sensor of compressor 1 (Short or Open)
9 E231 Error on outdoor COND OUT sensor (Short or Open)
10 E320 Error on OLP sensor (Short or Open)
11 E485 Error on input current sensor of inverter 1 (Short or Open)
12 E474 Error on IPM Heat Sink sensor of inverter 1 (Short or Open)
13 E425 Reverse phase or open phase
14 E422 Blockage detected on high pressure pipe
15 E554 Gas leak detected
16 E416 System stop due to discharge temperature
17 E463 System stop due to OLP temperature control
18 E458 Fan speed error
19 E483 H/W DC_Link Over Voltage Error
20 E462 System stop due to full current control
21 E404 System stop due to overload protection control
22 E590 Inverter EEPROM CheckSum error
23 E464 System stop due to DC Peak
24 E465 Compressor overload prevention
25 E468 Error on current sensor (Short or Open)
26 E461 Error due to operation failure of inverter compressor
27 E467 Error due to abnormal rotation of the compressor or unconnected wire of compressor
28 E469 Error on DC-Link voltage sensor (Short or Open)
29 E488 AC Input Voltage Sensor Error
03 OTHERS
English-31
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