Gree GWC18MC-D3DNA3F/I

48
Installation and Maintenance
Service Manual
8
Blockage
protection of
indoor unit
H6
Indoor fan,
outdoor fan,
compressor
and electric
heating tube all
stop operation;
horizontal louver
stops at current
position.
Feedback terminal of
PG motor hasn't been
inserted tightly.
Refer to
maintenance
owchart
Control terminal of PG
motor is not inserted
tightly.
Fan is blocked
Malfunction of motor.
Circuit malfunction of
main board.
9
Malfunction
protection of
jumper cap
C5
Operation of
remote controller
or control panel
is available, but
the unit won’t act.
Jumper cap hasn't
been inserted on
main board.
Refer to
maintenance
owchart
Jumper cap hasn't
been inserted
correctly and tightly.
Jumper cap is
damaged.
Circuit of main board
is abnormal.
10
Malfunction of
outdoor ambient
temperature
sensor
F3
□ □ ☆ ■
During cooling
and drying
operation,
compressor and
outdoor fan stop
while indoor
fan operates.
During heating
operation, all
loads stop.
1.T-SENSOR terminal
hasn’t been inserted
tightly;
2. Hardware
malfunction of outdoor
unit's main board;
1. After de-
energization,
reinsert
T-SENSOR
terminal tightly;
2. Replace
outdoor unit's
main board AP1;
11
Malfunction
of zero-cross
derection
U8
The complete
unit stops
1.Power supply is
abnormal.
2.Detection circuit
of indoor control
mainboard is
abnormal.
Refer to
maintenance
owchart