Gree GWH18MC-K3DNA2G Service Manual page 58

Service Manual
(4) Charging Malfunction of Capacitor (PU)
Main check point:
Whether input power is normal?
Main board is damaged.
Check flow chart:
Check the input power and
resume the power supply
normal
Is malfunction eliinated?
Installation and Maintenance
No
No
Yes
Energize and turn on the unit;
wait for 1 min
Measure the voltage at
both ends of big electrolytic
capacitor with the DC notch of
universal meter
Is the voltage more than
100V?
No
Check whether the input
voltage is within the normal
range?
Yes
Replace main board of
outdoor unit
End
There is malfunction for the
Yes
detection circuit on main
board of outdoor unit
55