| No. | Failure Code | Failure Name | Primary Troubleshooting Parts | |
| 1 | L0 | DC Over/Under-voltage Failure | The outdoor unit controller / the power grid | |
| 2 | L1 | Overcurrent Protection on Phase Current | The outdoor unit controller / the power grid / | |
| of The compressor | the compressor/the compressor wire | |||
| 3 | L2 | Step Failure of The compressor | The outdoor unit controller / the power grid / | |
| the compressor/system pressure | ||||
| 4 | L3 | Phase Failure of The compressor | The outdoor unit controller / the power grid / | |
| the compressor/the compressor wire | ||||
| 5 | L4 | Driver Module IPM Failure of The compressor | The outdoor unit controller / the power grid / | |
| the compressor | ||||
| 6 | L5 | PFC Overcurrent Hardware Protection | The outdoor unit controller / the power grid | |
| 7 | L6 | PFC Overcurrent Software Protection | The outdoor unit controller / the power grid | |
| 8 | L7 | AD Abnormal Protection in Current | The outdoor unit controller | |
| Detection | ||||
| 9 | L8 | Shunt Resistance Imbalance Failure | The outdoor unit controller | |
| 10 | L9 | IPM Temperature Sensor Failure | The outdoor unit controller | |
| 11 | LA | The compressor Startup Failure | The outdoor unit controller / the power grid / | |
| the compressor/the compressor wire | ||||
| 12 | LC | AD Abnormal Protection in PFC Current | The outdoor unit controller | |
| Detection | ||||
Display the error code of the indoor unit: fix speed A/C & E1. E2, E3 and E4 Errors
| No. | Error Code | Error Name | Probable Trouble Location | |
| 1 | E1 | Internal room temperature | The internal room temperature sensor, the main internal | |
| sensor error | control panel | |||
| 2 | E2 | External coil sensor error | External coil sensor error, the main external control | |
| panel | ||||
| 3 | E3 | Internal coil sensor error | Internal coil sensor error, the main internal control | |
| panel | ||||
| 4 | E4 | The indoor fan error | Mechanical jam of internal the fan blade, internal fan, | |
| the main internal control panel | ||||
| 5 | E5(5E) | The indoor and outdoor unit | The bridge cable, the main internal control panel, the main | |
| communication error | external control panel, module panel | |||
| 6 | F0 | The outdoor DC fan error | Mechanical jam of external the fan, external DC of the fan, | |
| the main external control panel | ||||
| 7 | F1 | Module protection error | The power voltage, the compressor cable, the reactor, the module | |
| the panel, the main external control panel, the compressor | ||||
| 8 | F2 | PFC protection error | The power voltage, reactor, module panel, the main | |
| external control panel | ||||
| 9 | F3 | The compressor out-of-step | System pressure, the compressor cable, module panel, | |
| error | the main external control panel, the compressor | |||
| 10 | F4 | Exhaust air sensor error | Exhaust air sensor, the main external control panel | |
| 11 | F5 | The compressor cap sensor error | System pressure, the compressor cap sensor | |
| (Protection switch), the main external control panel | ||||
| 12 | F6 | External room temperature | The external room temperature sensor, the main external | |
| sensor error | control panel | |||
| 13 | F7 | OVP or UVP error | The power voltage, reactor, module panel, the main | |
| external control panel | ||||
| The main external control panel | Connection wire of module and the main control data, | |||
| 14 | F8 | and module panel | ||
| module panel, the main external control panel | ||||
| communication error | ||||
| 15 | F9 | The outdoor EE error | The main external control panel | |
| 16 | FA | Recirculated sensor error | The recirculated sensor, the four-way valve, and the main external | |
| control panel | ||||