97
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
Indoor
ambient
temperature
sensor is
open/short
circuited
F1
Off 3S
and blink
1 times
During cooling and dry-
ing operating, compres-
sor stops while indoor
fan operates; During
heating operation, the
complete unit will stop
operation.
1. Loosening or bad
contact of indoor
evaporator temp
sensor and mainboard
terminal; 2. Compo-
nents on the main-
board fall; 3. Indoor
evaporator temp
sensor damaged; 4.
Mainboard damaged.
Indoor
evaporator
temperature
sensor is
open/short
circuited
F2
Off 3S
and blink
twice
AC stops operation
once reaches the setting
temperature. Cooling,
drying: internal fan
motor stops operation
while other loads stop
operation; heating: AC
stop operation
1. Loosening or bad
contact of indoor
evaporator temp
sensor and mainboard
terminal; 2. Compo-
nents on the main-
board fall; 3. Indoor
evaporator temp
sensor damaged; 4.
Mainboard damaged.
Outdoor
ambient
temperature
sensor is
open/short
circuited
F3
Off 3S
and blink
3 times
Off 1S
and
blink 6
times
During cooling and dry-
ing operating, compres-
sor stops while indoor
fan operates; During
heating operation, the
complete unit will stop
operation.
Outdoor temperature
sensor hasn’t been
connected well or is
damaged. Please check
it by referring to the
resistance table for
temperature sensor.
Outdoor
condenser
temperature
sensor is
open/short
circuited
F4
Off 3S
and blink
4 times
Off 1S
and
blink 5
times
During cooling and dry-
ing operating, compres-
sor stops while indoor
fan operates; During
heating operation, the
complete unit will stop
operation.
Outdoor temperature
sensor hasn’t been
connected well or is
damaged. Please check
it by referring to the
resistance table for
temperature sensor.