Gree GWH07AAAXA-K3NNA5A Service Manual page 60

Service Manual
7. Overload protection of compressor H3, high discharge temperature protection of compressor E4
(AP1 hereinafter refers to the control board of the outdoor unit)
Main detection points:
(1) electronic expansion valve (2) expansion valve terminal (3) charging amount of refrigerant (4) overload protector
Malfunction diagnosis process:
Installation and Maintenance
After the unit
de-energized
If the overload protector SAT
iswell connected?
Under ambient temperature, test the
resistance of overload protector with
ohmic meter resistance value 1000Ω
If the wiring terminal FA of electron
N
expansion is well connected?
The resistance value of
first 4 lead foot and the
fifth lead foot is similar, less
Replace
overload
protector SAT
expansion valve
malfunction?
Check refrigerant, if there is
leakage, please refer to
malfunction?
for 20min
than 100Ω
Replace EKV
coil of electron
Remove
N
specification
Remove
N
Replace
control board
AP1
End
N
Connect wire
well with wiring
N
diagram
Y
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