Diagnosis Of Overload And Discharge Malfunction - Friedrich MWM09Y1J Service & Parts Manual

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Diagnosis of overload and discharge malfunction

Is electric expansion valve well connected? Is it damaged?
Is refrigerant leaked?
Is overload wire connection normal?
Are resistances between the first four pins close to the terminal hole and the 5th pin almost the same.? They should be less
than 100 ohm.
103
20min after
de-energization
of complete unit
Is electric
expansion valve
well connected?
Y
Is overload wire
reliably connected?
Y
Replace electric
expansion valve
Remove
malfunction?
N
Replace parts
of outdoor
electric box
Remove malfunction?
N
Refrigerant leakage,
recharge the
refrigerant
Finish
N
N
Adjust
connecting wire
Y
Y