| S01 | Room temperature sensor failure | Refer to detailed diagnostic |
| S02 | Indoor coil sensor failure | Check sensor for continuity |
| S03 | Humidity sensor failure | Replace indoor board |
| S04 | Comp. temperature sensor failure | Check sensor for continuity |
| S05 | Outdoor coil sensor failure | Check sensor for continuity |
| S06 | Outdoor air sensor failure | Check sensor for continuity |
| S07 | Outdoor current sensor failure | Replace outdoor board |
| E01 | Indoor/outdoor communication failure | Refer to detailed diagnostics |
| E02 | HIC circuit failure (Compressor/Fan circuit) | Refer to detailed diagnostics |
| E03 | Outdoor unit OTP rom failure | Refer to detailed diagnostics |
| E04 | Peak current cut off | Refer to detailed diagnostics |
| E05 | PAM or Active circuit failure | Refer to detailed diagnostics |
| E06 | High compressor discharge temperature | Refer to detailed diagnostics |
| E07 | Indoor fan operating failure | Refer to detailed diagnostics |
| E08 | 4 way valve switching failure (RV) | Refer to detailed diagnostics |
| E09 | No refrigerant protection | Refer to detailed diagnostics |
| E10 | DC compressor drive circuit failure | Refer to detailed diagnostics |
| E11 | Outdoor fan operating failure | Refer to detailed diagnostics |
| E12 | Error in outdoor unit | Refer to detailed diagnostics |
| E13 | Freeze prevention activated | Refer to detailed diagnostics |