Service Manual -
VFH-B 30/36/42 Series
34
Malfunction display: E4 Compressor Exhaust High Temperature Protection
N
Y
Y
N
Y
System pipeline leaks so
repair
is needed. 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
Malfunction display: 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 normall
Refer to high pressure protection
If voltage is normal
Contact the power supply
company
Replace mainboard
Abnormal overcurrent
Measure if compressor's
discharge temperature has
reached 239°F.
Summary of Contents for A-VFH30QB-1
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