7URXEOHVKRRWLQJ
42
ƹ
Malfunction
D
isplay: E4 Compressor Exhaust High Temperature Protection
N
Y
Y
N
Y
Measure if compressor’s discharge
temperature has reached 115
℃
System pipeline leaks
.
Please add refrigerant
according to the amount specified in the nameplate
Measure if temperature sensor’s
resistance value is correct
Replace the outdoor
unit mainboard
Replace relevant discharge
temperature sensor
Discharge temperature protection
ƹ
Malfunction
D
isplay: E5 Compressor Overheat
N
Y
Y
Y
Y
Y
N
N
N
Check if compressor’s connection line is
properly connected
Adjust compressor’s connection line
Check if current value is higher than the protector’s setting
Replace overcurrent protector
If unit’s high pressure is normaR
le
high pressure protection
If voltage is normal
Contact the power supply
company
Replace mainboard
Abnormal overcurrent
