| E1 | Remote control communication error |
| E2 | Duplicate indoor unit address |
| E3 | Outdoor unit signal line error |
| E5 | Communication error during operation |
| E6 | Internal heat exchanger temperature thermistor abnormality (Thi-R) |
| E7 | Internal return air temperature thermistor abnormality (Thi-A) |
| E9 | Unloading problem |
| E10 | Excessive number of indoor units with remote control |
| E12 | Address setting error with mixed setting method |
| E16 | Internal fan motor abnormality (FDT series) |
| E16 | Internal fan motor abnormality (FDK series) |
| E19 | Indoor unit operation control unload motor control mode abnormality |
| E28 | Remote control temperature thermistor abnormality (ThC) |
| E30 | Incompatible connection of indoor and outdoor unit |
| E31 | Replicated outdoor unit address no. |
| E32 | Open L3 phase in the primary side power supply |
| E36 | Drain pipe temperature error (Tho-D1, D2) |
| E36 | Liquid overflow abnormality |
| E37 | Abnormalities of external heat exchanger temperature thermistor (Tho-R) and sub-cooling coil temperature thermistor (Tho-SC, -H) |
| E38 | Outdoor temperature thermistor abnormality (Tho-A) |
| E39 | Drain pipe temperature thermistor abnormality (Tho-D1, D2) |
| E40 | High pressure abnormality (63H1-1, 2 active) |
| E41 (E51) | Power transistor overheating |
| E42 | Power failure (CM1, 2) |
| E43 | Over-connected indoor units, over-total capacity connection |
| E45 | Communication error between inverter PCB and external control PCB |
| E46 | Mixed address setting methods available on the same network |
| E48 | External DC fan motor abnormality |
| E49 | Low pressure abnormality |
| E53/E55 | Suction pipe temperature thermistor abnormality (Tho-S), Under-dome temperature thermistor abnormality (Tho-C1, C2) |
| E54 | High pressure sensor (TSH) Low pressure sensor (PSL) abnormality |
| E56 | Power transistor temperature thermistor abnormality (Tho-P1, Tho-P2) |
| E58 | Abnormal compressor with loss of synchronization |
| E59 | Compressor start failure (CM1, 2) |
| E60 | Rotor position detection failure (CM1, 2) |
| E61 | Communication error between main unit and backup units System error |
| E63 | Emergency stop |
