16
Technical Information
YES
Discharge temperature protection
Measure if compressor’s
discharge temperature has
reached 115ºC
System pipeline leaks so
complementation is needed.
Please add refrigerant according
to the amount specified in the
nameplate
Measure if temperature sensor’s
resistance value is correct
Replace relevant discharge
temperature sensor
Replace the outdoor
unit mainboard
NO
Malfunction display: E4 Compressor Exhaust High Temperature Protection
NO
YES
YES
Malfunction display: E5 Compressor Overheat
YES
Abnormal overcurrent
Check if compressor’s
connection line is properly
connected
Check if current value is higher
than the protector’s setting
If voltage is normal
If unit’s high pressure is normal
Replace mainboard
Adjust compressor’s connection line
Refer to high pressure protection
Replace overcurrent protector
NO
NO
NO
NO
Contact the power supply company
YES
YES
YES
YES
