| 1 | 25 | EE | IDU EE fault |
| 2 | 26 | E1 | IDU fan fault |
| 3 | 27 | E2 | Indoor fan zero-crossing detection abnormal |
| 4 | 28 | E3 | IDU coil & sensor fault |
| 5 | 29 | E4 | IDU ambient temperature sensor fault |
| 6 | 1 | E0 | ODU EE fault |
| 7 | 2 | F0 | IDU-ODU communication fault |
| 8 | 4 | F1 | Compressor starting abnormal (phase failure/reverse) |
| 9 | 5 | F2 | Compressor out of step fault |
| 10 | 6 | F3 | IPM module fault |
| 11 | 7 | F4 | Compressor shell roof fault/protection |
| 12 | 8 | F5 | Discharge temperature sensor fault |
| 13 | 9 | F6 | Suction temperature sensor fault |
| 14 | 10 | F7 | ODU coil temperature sensor fault |
| 15 | 11 | F8 | IDU ambient temperature sensor fault |
| 16 | 12 | F9 | ODU DC fan fault |
| 17 | / | E8 | ODU communication fault |
| 18 | 13 | P1 | ODU machine AC current protection |
| 19 | 14 | P2 | Compressor phase current protection |
| 20 | 15 | P3 | ODU high/low AC voltage protection |
| 21 | 16 | P4 | DC voltage high/low protection |
| 22 | 17 | P5 | IPM high-temperature protection |
| 23 | 18 | P6 | Discharge temperature overheat protection |
| 24 | 19 | P7 | IDU cooling coil anti-freeze protection |
| 25 | 20 | P8 | ODU coil overheat protection |
| 26 | 21 | P9 | IDU heating coil overheat protection |
| 27 | 22 | PC | IDU cooling ambient temperature low protection |
| 28 | 23 | PH | ODU heating ambient temperature high protection |
| 29 | 31 | L1 | Drive bus high voltage protection |
| 30 | 32 | L2 | Drive bus low voltage protection |
| 31 | 33 | L3 | Drive phase current overload fault |
| 32 | 34 | L4 | Phase current sampling abnormal |
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