Error Code Table for Diamante & Quantum Series SystemsUpdated 4 days ago
This article provides an error code table for Diamante and Quantum series systems.
| Code | Reason | Remark |
| bc | PM2.5 sensor failure (Indoor unit failure, optional) | Query by pressing the remote controller |
| bf | TVOC sensor failure (Indoor unit failure, optional) | Query by pressing the remote controller |
| bj | Humidity sensor failure (Indoor unit failure) | Query by pressing the remote controller |
| CL | Filter duty reminder | Clean the air filter, then cut off the power supply again |
| E0 | Indoor unit and outdoor unit communication failure | Is the wiring connection of the indoor unit and outdoor unit correct? |
| E1 | Indoor unit room temperature sensor failure (Indoor unit room temperature failure) | Indoor unit sensor and PCB |
| E2 | Indoor unit coil temperature sensor failure (Indoor unit pipe (coil) temperature failure) | Indoor unit sensor and PCB |
| E3 | Outdoor unit coil temperature sensor failure (Outdoor pipe temperature) | Outdoor unit coil sensor and PCB |
| E4 | AC-cooling system abnormal | Gas leakage? 2-way or 3-way valve blocked? |
| E5 | Indoor unit or outdoor unit mismatched failure (specifically performance test on the production line) | / |
| E6 | Indoor unit PG fan motor or DC fan motor abnormal operation (Indoor unit failure) | Fan motor, fan blade, and PCB |
| E7 | Outdoor unit ambient temperature sensor failure | Outdoor unit ambient sensor and PCB |
| E8 | Outdoor unit discharge temperature sensor failure | Outdoor unit discharge sensor and PCB |
| E9 Diamante / Quantum | IPM or compressor driving control abnormal | Outdoor unit PCB, compressor, etc. |
| EA | Outdoor unit current test circuit failure | Is the outdoor unit PCB broken? |
| Eb | Abnormal communication of the main PCB and display board (Indoor unit failure) | Display board and main PCB |
| EE | Outdoor unit EEPROM failure | 1. Is the outdoor unit PCB broken? 2. Try to re-power on the AC unit |
| EF | Outdoor unit DC fan motor failure | Fan motor and outdoor unit PCB |
| EH | Suction temperature sensor failure | / |
| En | Gas pipe temperature sensor failure | / |
| EU | Outdoor unit voltage test sensor fault | Outdoor unit PCB |
| Ey | Liquid pipe temperature sensor failure | / |
| F0 | Infrared customer feeling test sensor failure (Indoor unit failure) | Query by pressing the remote controller |
| F1 | Electric power test module failure (Indoor unit failure) | Query by pressing the remote controller |
| F2 | Discharge temperature sensor failure protection | Check the troubleshooting for details |
| F3 | Outdoor unit coil temperature failure protection | Check the troubleshooting for details |
| F4 | Cooling system gas flow abnormal protection | Check the troubleshooting for details |
| F5 | PFC overcurrent protection | Check the troubleshooting for details |
| F6 Diamante / Quantum | Compressor lack of phase or anti-phase protection | Check the troubleshooting for details |
| F7 | IPM over-temperature protection | Check the troubleshooting for details |
| F8 | 4-way value reversing abnormal | Check the troubleshooting for details |
| F9 | Module temperature test circuit failure | Outdoor unit PCB |
| FA | Compressor phase-current test circuit failure | Outdoor unit PCB |
| Fb | Limiting or reducing frequency for overload protection in Cooling or Heating mode | Query by pressing the remote controller |
| FC | Limiting or reducing frequency for high-power consumption protection | Query by pressing the remote controller |
| Fd | Refrigerant detector failure | Check the troubleshooting for details |
| FE | Limiting or reducing frequency for module current protection (phase current of compressor) | Query by pressing the remote controller |
| FF | Limiting or reducing frequency for module temperature protection | Query by pressing the remote controller |
| FH | Limiting or reducing frequency for compressor driving protection | Query by pressing the remote controller |
| Fj | Limiting or reducing frequency for discharge over-temperature protection | Query by pressing the remote controller |
| Fn | Limiting or reducing frequency for outdoor unit AC-current protection | Query by pressing the remote controller |
| FP | Limiting or reducing frequency for anti-condensation protection | Query by pressing the remote controller |
| FU | Limiting or reducing frequency for anti-frost protection | Query by pressing the remote controller |
| H1 | High pressure switch failure (Multi-Zone units only) | / |
| H2 | Low pressure switch failure (Multi-Zone units only) | / |
| Hd | Leak detector of the indoor unit detects refrigerant | / |
| Fy | Gas leakage protection | Query by pressing the remote controller |
| P0 | IPM protection | Outdoor unit PCB |
| P1 | Over or under-voltage protection | 1. Is the outdoor unit PCB broken? 2. Is the power supply abnormal? |
| P2 | Over-current protection | 1. Is the outdoor unit PCB broken? 2. Is the power supply abnormal? |
| P4 Diamante / Quantum | Outdoor unit discharge temperature overheating protection | Check the troubleshooting for details |
| P5 | Sub-cooling protection in Cooling mode | Check the troubleshooting for details |
| P6 | Overheating protection in Cooling mode | Check the troubleshooting for details |
| P7 | Overheating protection in Heating mode | Check the troubleshooting for details |
| P8 | Outdoor over-temperature or under-temperature protection | Check the troubleshooting for details |
| P9 | Compressor driving protection (Load abnormal) | Check the troubleshooting for details |
| PA | Communication failure for the top flow unit or preset mode conflict (Multi-Zone units only) | Check the troubleshooting for details |