103
Fault Displays
Models GWH09MB-D3DNA3D & GWH12MB-D3DNA3D
Malfunction
Name
Indoor Unit
Outdoor Unit
A/C Status
Possible Causes
Dual-8
Code
Display
Indicator Display (during blink-
ing, ON 0.5s and OFF 0.5s
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Operation
Cool
Heating
Yellow
Red
Green
Outdoor DC
fan motor
malfunction
L3
Off 3S
and blink
23 times
Off 3S
and blink
14 times
Outdoor DC fan
motor malfunction
lead to compressor
stop operation
DC fan motor
malfunction or
system blocked
or the connector
loosed
Power protec-
tion
L9
Off 3S
and blink
20 times
Off 3S
and blink
9 times
Compressor stop
operation and
Outdoor fan motor
will stop 30s later,
3 minutes later fan
motor and compres-
sor will restart
To protect
the electronic
components
when detect high
power
Indoor unit
and outdoor
unit doesn't
match
LP
Off 3S
and blink
19 times
Off 3S
and blink
16 times
Compressor and
Outdoor fan motor
can't work
Indoor unit and
outdoor unit
doesn't match
Failure start-
up
LC
Off 3S
and blink
11 times
During cooling and
drying operation,
compressor will
stop while indoor
fan will operate.
During heating
operation, the com-
plete unit will stop
operation.
Refer to the mal-
function analysis
Malfunction
of phase cur-
rent detection
circuit for
compressor
U1
Off 3S
and blink
13 times
During cooling and
drying operation,
compressor will
stop while indoor
fan will operate.
During heating
operation, the com-
plete unit will stop
operation.
Replace outdoor
control panel
AP1
Malfunction
of voltage
dropping for
DC bus-bar
U3
Off 3S
and blink
20 times
During cooling and
drying operation,
compressor will
stop while indoor
fan will operate.
During heating
operation, the com-
plete unit will stop
operation.
Supply voltage is
unstable