102
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
IPM protec-
tion
H5
Off 3S
and blink
5 times
Off 1S
and blink
4 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.
Refer to the mal-
function analysis
(IPM protection,
loss of synchro-
nism protection,
and overcurrent
protection of
phase current for
compressor)
Module
temperature
is too high
H5
Off 3S
and blink
5 times
Off 1S
and blink
10 times
Internal
motor (fan
motor) do not
operate
H6
Off 3S
and blink
11 times
Internal fan mo-
tor, external fan
motor, compressor
and electric heater
stop operation,
guide louver stops
at present location
1. Bad contact of
DC motor feed-
back terminal; 2.
Bad contact of DC
motor control end;
3. Fan motor is
stalling; 4. Motor
malfunction; 5.
Malfunction of
mainboard rev
detecting circuit
Desynchro-
nizing of
compressor
H7
Off 3S
and blink
7 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.
Refer to the mal-
function analysis
(IPM protection,
loss of synchro-
nism protection,
and overcurrent
protection of
phase current for
compressor)
PFC protec-
tion
HC
Off 3S
and blink
6 times
Off 3S
and blink
14 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.
Refer to the mal-
function analysis