Gree GWH09TB-D3DNA1A Service Manual page 70

(7) 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:
Start
Check the
connection wire
of reactor (L) of
outdoor unit and
PFC capacity
If there is damaged
short circuit
N
Remove PFC capacity
and test resistance of
two terminals
If the resistance
value is 0
N
Cut the terminal of reactor,
test the resistance
between two terminals of
reactor with ohmic meter
If there is damaged
short circuit
N
Replace
control board
AP1
End
Replace
connection
Y
wire with circuit
diagram
Capacity is
Re-energize
short
the unit and
Y
circuit and
replace it
Replace the
Y
reactor the unit and
If the malfunction is
removed?
N
If the malfunction is
removed?
start it
N
Re-
energize
If the malfunction is
removed?
start it
N
Y
Y
Y