124
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
Malfunction
of voltage
dropping for
DC bus-bar
U3
Off 3S
and blink
20 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.
Supply voltage is
unstable
Malfunction
of complete
units current
detection
U5
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.
Theres circuit
malfunction on
outdoor units
control panel AP1,
please replace the
outdoor units con-
trol panel AP1.
The four-way
valve is abnor-
mal
U7
Off 3S
and blink
20 times
If this malfunction
occurs during
heating operation,
the complete unit
will stop opera-
tion.
1. Supply volt-
age is lower
than AC175V; 2.
Wiring terminal
4V is loosened or
broken; 3. 4V is
damaged, please
replace 4V.
Zero crossing
malfunction
of outdoor
unit
U9
Off 3S
and blink
18 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.
Replace outdoor
control panel AP1
Frequency
limiting
(power)
L3
Off 3S
and blink
13 times