| Code | Possible Cause |
|---|---|
| Ch | Prohibit starting during operation of the Crack case heater |
| E108 | Error due to repeated communication address |
| E121 | Error on room temperature sensor of indoor unit (Short or Open) |
| E122 | Error on EVA IN sensor of indoor unit (Short or Open) |
| E123 | Error on EVA OUT sensor of indoor unit (Short or Open) |
| E124 | Communication error sends from indoor unit |
| E128 | Indoor unit EVA IN sensor breakaway |
| E129 | Indoor unit EVA OUT sensor breakaway |
| E131 | Indoor unit heater sensor error |
| E151 | Indoor unit EEV open failure(When 2* detection) |
| E152 | Indoor unit EEV close failure(When 2“ detection) |
| E153 | Indoor unit floating S/V error(When 2“ detection) |
| E154 | Indoor unit fan error |
| E162 | Outdoor unit EEPROM error |
| E198 | Error on thermal fuse of indoor unit (Open) |
| E201 | Communication error between indoor unit and outdoor unit (Pre tracking failure or when actual number of indoor units are different from the indoor unit quantity setting on the outdoor unit) Error due to communication tracking failure after initial power supply (The error occurs with the failure regardless of the number of devices) |
| E202 | Communication error between indoor and outdoor unit (When not received in every room after completing the tracking) |
| 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) |
| E221 | Error on outdoor temperature sensor (Short or Open) |
| E231 | Error on outdoor COND OUT sensor (Short or Open) |
| E241 | COND OUT sensor breakaway |
| E251 | Digital comp.1 discharge temperature sensor(Short or Open) |
| E256 | Fixed comp.1 discharge temperature sensor(Short or Open) |
| E257 | Fixed comp.2 discharge temperature sensor(Short or Open) |
| E258 | Fixed comp.3 discharge temperature sensor(Short or Open) |
| E262 | Fixed compl Discharge temperature sensor breakaway |
| E263 | Fixed comp2 Discharge temperature sensor breakaway |
| E264 | Fixed comp3 Discharge temperature sensor breakaway |
| E265 | Digital compl Sump temperature sensor breakaway. Fixed compl Sump temperature sensor breakaway |
| E267 | Fixed comp2 Sump temperature sensor breakaway |
| E268 | Fixed comp3 Sump temperature sensor breakaway |
| E269 | Suction temperature sensor breakaway |
| E271 | Comp.1 Sump temperature sensor(Short or Open) |
| E291 | High pressure sensor(Short or Open) |
| E296 | Low pressure sensor(Short or Open) |
| E307 | Oil balance sensorl (Short or Open) |
| E308 | Suction sensor(Short or Open) |
| E311 | Double pipe sensor(Short or Open) |
| E320 | Error on OLP sensor (Short or Open) |
| E403 | Compressor down due to freeze protection control |
| E404 | System stop due to overload protection control |
| E407 | Comp, down by high pressure |
| E410 | Comp, down by low pressure |
| E413 | Comp, down by the sump protection control |
| E416 | Comp, down by the discharge temperature sensor |
| E422 | Blockage detected on high pressure pipe |
| E425 | Reverse phase or open phase |
| E428 | Comp down by compression ratio control |
| E431 | Equal oil valve 1 self diagnosis |
| E440 | Heating operation restricted at outdoor temperature overheating value (default: 30 °C) |
| E441 | Cooling operation restricted at outdoor temperature below cool value (default 0°Q |
| E442 | Forbid an operation during heat mode with refrigerant charging operation when outdoor temperature is over 15°C |
| E443 | Start prohibition by refrigerant pressure error |
| E452 | Instant power off error |
| E453 | Fan motor hifi temperature error |
| E454 | Fan motor RPM error |
| E455 | Fan motor IPM high temperature error |
| E456 | Fan motor over current error |
| E457 | Fan motor reverse rotation error |
| E458 | Fan speed error |
| E461 | Error due to operation failure of inverter compressor |
| E461 | CTJow current |
| E462 | System stop due to full current control |
| E463 | System stop due to OLP temperature control |
| E464 | System stop due to DC Peak |
| E465 | Compressor overload prevention |
| E466 | DC-Link voltage under/over error |
| E467 | Error due to abnormal rotation of the compressor or unconnected wire of compressor |
| E468 | Error on current sensor (Short or Open) |
| E469 | Error on DC-Link voltage sensor (Short or Open) |
| E470 | Outdoor unit EEPROM Read/Write error (Option) |
| E471 | Outdoor unit EEPROM Read/Write error (H/W) |
| E472 | AC Line Zero Cross Signal out |
| E473 | Comp Lock error |
| E474 | Error on IPM Heat Sink sensor of inverter 1 (Short or Open) |
| E475 | Error of inverter fan 2 |
| E484 | PFC Overload (Over current) Error |
| E485 | Error on input current sensor of inverter 1 (Short or Open) |
| E500 | IPM over heat error on inverter 1 |
| E508 | Smart install is not installed |
| E554 | Gas leak detected |
| E556 | Error due to mismatching capacity of indoor and outdoor unit |
| E557 | DPM remote controller option error |
| E560 | Switch option setting error(rvot applied) |
| E590 | Inverter EEPROM Checksum error |
| E660 | Error of inverter Boot Code |
| P701 | Indoor unit floating S/V error(When 1“ detection) |
| P702 | Indoor unit EEV close failure(When 1“ detection) |
| P703 | Indoor unit EEV open failure(When 1“ detection) |
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