| IDU DISPLAY | ODU LIGHT | FAULT DETAILS | IDU DISPLAY | ODU LIGHT | FAULT DETAILS |
| FLASH TIMES | FLASH TIMES |
| P1 | 13 | Outdoor machine AC current protection | EE | 25 | Indoor machine EE fault |
| P2 | 14 | Compressor phase current protection | E1 | 26 | Indoor fan fault |
| P3 | 15 | Outdoor unit Over-voltage/ Under-voltage protection | E2 | 27 | Indoor fan Zero crossing detection abnormal |
| P4 | 16 | DC -Bus Over -volt age/ Under-voltage protection | E3 | 28 | Indoor Coil temperature sensor fault |
| P5 | 17 | IPM over high-temperature protection | E4 | 29 | Indoor ambient temperature sensor fault |
| P6 | 18 | Discharge temperature overheat protection | E6 | 2 | Indoor and outdoor machine communication fault |
| P7 | 19 | Indoor cooling coil anti-freezing protection | E0 | 1 | Outdoor EE Fault |
| P8 | 20 | Cooling outdoor coil overheat protection | F1 | 4 | Compressor starting abnormal (phase failure, reverse) |
| P9 | 21 | Indoor Heating coil overheat protection (optional) | F2 | 5 | Compressor out-of-step fault |
| PC | 22 | Cooling outdoor ambient temperature over-low protection | F3 | 6 | IPM module fault |
| PH | 23 | Outdoor ambient temperature over-high protection when cooling | F4 | 7 | Compressor Shell roof fault / protection |
| L1 | 31 | Drive bus voltage over-high protection | F5 | 8 | Discharge temperature sensor fault |
| L2 | 32 | Drive bus voltage over-low protection | F6 | 9 | Suction temperature sensor fault |
| L3 | 33 | Drive phase current overload fault | F7 | 10 | Outdoor coil temperature sensor fault |
| L4 | 34 | Phase current sampling abnormal | F8 | 11 | Outdoor ambient temperature sensor fault |
| | | F9 | 12 | Outdoor DC fan fault |
