118
Fault Displays
Models GWH30LB-D3DNA3E & GWH36LB-D3DNA3E
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
Decrease fre-
quency due to
overcurrent
F8
Off 3S
and blink
8 times
Off 3S
and blink
1 times
During cooling
and drying oper-
ation, compressor
will stop while
indoor fan will
operate. During
heating operation,
the complete unit
will stop opera-
tion.
The input supply
voltage is too low;
System pressure
is too high and
overload
Decrease
frequency due
to high air
discharge
F9
Off 3S
and blink
9 times
Off 3S
and blink
2 times
All loads operate
normally, while
operation frequen-
cy for compressor
is decreased.
Overload or
temperature is too
high; Refrigerant
is insufficient;
Malfunction of
electric expansion
valve (EKV)
Limit/
decrease fre-
quency due to
anti freezing
FH
Off 3S
and blink
2 times
Off 3S
and blink
2 times
Off 3S
and blink
4 times
All loads operate
normally, while
operation frequen-
cy for compressor
is decreased.
Poor air-return in
indoor unit or fan
speed is too low
Voltage of DC
bus-bar is too
high
PH
Off 3S
and blink
11 times
Off 3S
and blink
13 times
During cooling
and drying oper-
ation, compressor
will stop while
indoor fan will
operate. During
heating operation,
the complete unit
will stop opera-
tion.
1. Measure the
voltage of position
L and N on wiring
board (XT), if the
voltage is higher
than 150VAC, turn
on the unit after
the supply voltage
is increase to the
normal range; 2.
If the AC input is
normal, measure
the voltage of
electrolytic capac-
itor C on control
panel (AP1), if
its normal, theres
malfunction for
the circuit, please
replace the control
panel (AP1)
