| Code | Description | Solution |
|---|---|---|
| b5 | Liquid valve temperature sensor error |  |
| b7 | Gas valve temperature sensor error |  |
| C5 | Malfunction protection of jumper cap |  |
| dd | Detection status of wrong connection of communication wire or malfunction of electronic expansion valve |  |
| dn | Wrong connection of communication wire or malfunction of electronic expansion valve |  |
| E1 | Compressor high pressure protection |  |
| E2 | Anti-freezing protection for evaporator |  |
| E3 | Compressor low pressure protection |  |
| E4 | High discharge temperature protection of compressor |  |
| E5 | Whole unit overcurrent protection |  |
| E6 | Communication malfunction |  |
| E7 | Mode conflict |  |
| E8 | High temperature and Overload protection |  |
| E9 | Cold air prevention protection | |
| EE | ODU memory chip error |  |
| ee | Drive memory chip error |  |
| EU | Limit/decrease frequency due to high temperature of module |  |
| F0 | Refrigerant lacking or blockage protection of system | |
| F1 | Indoor ambient temperature sensor error |  |
| F2 | Indoor evaporator temperature sensor error |  |
| F3 | Outdoor ambient temperature sensor error |  |
| F4 | Outdoor condenser temperature sensor error | |
| F5 | Outdoor discharge temperature sensor error |  |
| F6 | Limit/decrease frequency due to overload |  |
| F8 | Decrease frequency due to overcurrent |  |
| F9 | Decrease frequency due to high air discharge |  |
| FH | Limit/decrease frequency due to antifreezing |  |
| Fo | Refrigerant recycling mode |  |
| H1 | Defrosting or oil return in heating mode |  |
| H3 | Compressor overload protection |  |
| H4 | Overload or overtemperature protection |  |
| H5 | IPM modular protection |  |
| H6 | Internal motor (fan motor) do not operate |  |
| H7 | Compressor desynchronizing |  |
| HC | PFC protection |  |
| HE | Compressor demagnetization protection |  |
| JF | Malfunction of detecting plate(WIFI) |  |
| L3 | Outdoor DC fan motor malfunction |  |
| L9 | Power protection |  |
| LC | Start failure of compressor |  |
| Ld | Compressor phase-lacking/phase-inverse protection | |
| LP | Indoor unit and outdoor unit doesn't match |  |
| oE | PFC module temperature protection | |
| P0 | Compressor Min frequency in test state |  |
| P1 | Compressor rated frequency in test state |  |
| P2 | Compressor maximum frequency in test state |  |
| P3 | Compressor intermediate frequency in test state |  |
| P5 | Compressor phase current protection |  |
| P6 | Master control and driver communication error |  |
| P7 | Driver module sensor error |  |
| P8 | Driver module temperature is too high |  |
| PA | AC current protection |  |
| Pc | Driver current error |  |
| PH | DC bus-bar high voltage protection |  |
| PL | DC bus-bar low voltage protection |  |
| PU | Capacitor or Charge loop error |  |
| U1 | Malfunction of phase current detection circuit for compressor |  |
| U3 | Malfunction of voltage dropping for DC bus-bar |  |
| U5 | Malfunction of complete unit's current detection |  |
| U7 | The four-way valve is abnormal |  |
| U8 | Malfunction of zero-cross detection circuit |  |
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