98
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 dis-
play status and during blink-
ing, ON 0.5s and OFF 0.5s
Operation
Cool
Heating
Yellow
Red
Green
Outdoor
discharge
temperature
sensor is
open/short
circuited
F5
Off 3S
and blink
5 times
Off 1S
and blink
7 times
During cooling and
drying operation,
compressor will sop
after operating for
about 3 mins, while
indoor fan will
operate. During
heating operation,
the complete unit
will stop after
operating for about
3 mins.
1. Outdoor tempera-
ture sensor hasn’t
been connected well
or is damaged. Please
check it by referring
to the resistance
table for tempera-
ture sensor; 2. The
head of temperature
sensor hasn't been
inserted into the
copper tube.
Limit/
decrease
frequency due
to overload
F6
Off 3S
and blink
6 times
Off 1S
and blink
3 times
All loads operate
normally, while
operation frequen-
cy for compressor is
decreased.
Refer to the mal-
function analysis
(overload, high tem-
perature resistant)
Decrease fre-
quency due to
overcurrent
F8
Off 3S
and blink
8 times
Off 1S
and blink
1 times
During cooling and
drying operation,
compressor will
stop while indoor
fan will operate.
During heating
operation, the com-
plete unit will stop
operation.
The input supply
voltage is too low;
System pressure is
too high and over-
load
Decrease
frequency due
to high air
discharge
F9
Off 3S
and blink
9 times
Off 1S
and blink
2 times
All loads operate
normally, while
operation frequen-
cy for compressor is
decreased.
Overload or tem-
perature is too high;
Refrigerant is insuf-
ficient; 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
