Gree GWH18AC-D3DNA1B Service Manual page 55

Troubleshooting
9.2.3.7 PFC (correction for power factor) malfunction (outdoor unit malfunction)
Indoor display: HC (dual-8 display), heating indicator is off for 3S and blinks 6 times.
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
Finish
Replace
connection
Y
wire with circuit
diagram
Capacity is
short
Y
circuit and
replace it
Replace the
Y
reactor
If the malfunction is
N
Re-energize
the unit and
If the malfunction is
start it
N
Re-
energize
If the malfunction is
the unit and
start it
N
52
removed?
Y
removed?
Y
removed?
Y