
- 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