Gree GWH18TC-S3DNA1D Service Manual page 82

Service Manual
8.PFC (correction for power factor) malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit)
Main detection point:
● Check if reactor (L) of outdoor unit and PFC capacity are damaged.
Malfunction diagnosis process:
Check the
connection wire
of reactor (L) of
outdoor unit and
PFC capacity
If there is damaged
short circuit
Remove PFC capacity
and test resistance of
two terminals
If the resistance
value is 0
Cut the terminal of reactor,
test the resistance
between two terminals of
reactor with ohmic meter
If there is damaged
short circuit
Replace
control board
Installation and Maintenance
Start
Y
Yes
N
No
Capacity is
short
Y
Yes
circuit and
replace it
N
No
Replace the
Yes
reactor
N
No
AP1
End
Replace
connection
wire with circuit
diagram
N
No
Re-energize
the unit and
start it
N
No
Re-
energize
the unit and
start it
N
No
If the malfunction is
removed?
If the malfunction is
Yes
removed?
If the malfunction is
Yes
removed?
Y
Y
Y
Yes
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