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Troubleshooting
(6) Overload and air exhaust malfuntion diagnosis (following AP1 for outdoor unit unit control board)
Mainly detect:
Wether the PMV is connected well or not? Is PMV damaged?
Is refrigerant leaked?
20 minutes after the
complete unit is
powered o ff
Is the terminal FA for the
Connect the
PMV
wires correctly
connected correctly?
Resistances between the first four pins
close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.
Replace the PMV
If the fault is eliminated?
Replace the
control panel
AP1
If the fault is eliminated?
Coolant leakage, refilling
the coolant
End
66
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