Frequency Drop for Heating High Temperature
Protection
Defrost or Oil Return Heat Mode
Electrostatic Air Cleaning Protection
Compressor Overload Protection
Indoor Fan Motor Failure (Except for 42K Unit)
Compressor Desynchronizing
PFC Over-current Malfunction
Demagnetizing Protection for Compressor
Outdoor Fan motor Failure
High Supply Voltage Protection
Compressor Phase Failure / Reverse Protection
Compressor Stalling (42K Unit Only)
Over-Speed (42K Unit Only)
Indoor and Outdoor Unit Do Not Match Each Other
Phase Over-current Protection
Communication Error between the Drive Board and the
Main Board (42K Unit Only)
Module Temperature Sensor Failure
Module Overheat Protection
AC Contactor Protection (42K Unit Only)
Transducer Connection Protection (42K Unit Only)
Temperature Drift Protection (42K Unit Only)
Drive Board Ambient Sensor Failure (42K Unit Only)
High Voltage Protection of DC Busbar
Low Voltage Protection of DC Busbar
AC Input Voltage Anomaly (42K Unit Only)
Capacitor Charging Circuit Error
Compress Phase Circuit Detection Error
(Except for 42K Unit)
DC Busbar Voltage Drop Error (Except for 42K Unit)
Indoor fan Motor Zero-cross Detecting Error
(Except for 42K Unit)
Outdoor Unit Zero-cross Detecting Error
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