Gree GWH12QB-K3DNA6O Service Manual page 66

Service Manual
Blockage
9 protection of
indoor unit
Malfunction
10 protection of
jumper cap
Indoor fan circuit
malfunction
11
by zero cross
detection
Installation and Maintenance
Indoor fan, outdoor fan,
Flash compressor and electric
H6 11 times heating tube all stop
every 3s operation; horizontal louver
stops at current position.
Operation of remote
Flash
controller or control panel is
C5 15 times
available, but the unit wont
every 3s
act.
Operation of remote
Flash
controller or control panel is
U8 17 times
available, but the unit wont
every 3s
act.
Feedback terminal of PG
motor hasnt been inserted
tightly.
Control terminal of PG
motor is not inserted
tightly.
Refer to maintenance
flowchart
Fan is blocked
Malfunction of motor.
Circuit malfunction of
main board.
Jumper cap hasnt been
inserted on main board.
Jumper cap hasnt been
inserted correctly and
Refer to maintenance
tightly.
flowchart
Jumper cap is damaged.
Circuit of main board is
abnormal.
1. Discharging speed of
capacitor is slow, which
lead to wrong judgement
of controller.
Refer to maintenance
flowchart
Zero-crossing detection
circuit of main board is
abnormal
63