95
Fault Displays
Models GWH09MB-D3DNA3D & GWH12MB-D3DNA3D
Malfunc-
tion Name
Indoor Unit
Outdoor Unit
A/C Status
Possible Causes
Dual-8
Code
Display
Indicator Display (during blinking,
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
High
pressure
protection
of system
E1
OFF 3S
and blink
once
During cooling and
drying operation,
except indoor fan op-
erates, all loads stop
operation. During
heating operation,
the complete unit
stops
Possible reasons:
1. Refrigerant
was superabun-
dant; 2. Poor heat
exchange (includ-
ing filth blockage
of heat exchanger
and bad radiating
environment);
Ambient tem-
perature is too
high
Anti-
freezing
protection
E2
OFF 3S
and blink
twice
Off 3S and
blink 3
times
During cooling and
drying operation,
compressor and out-
door fan stop while
indoor fan operates
1. Poor air-return
in indoor unit;
2. Fan speed is
abnormal; 3.
Evaporator is
dirty
System
block or
refrig-
erant
leakage
E3
Off 3S and
blink 3
times
Off 3S and
blink 9
times
The Dual-8 Code
Display will show E3
until the low pressure
switch stop operation
1. Low-pressure
protection; 2.
Low-pressure
protection of sys-
tem; 3. Low-pres-
sure protection of
compressor
High
discharge
tem-
perature
protection
of com-
pressor
E4
Off 3S and
blink 4
times
Off 3S and
blink 7
times
During cooling and
drying operation,
compressor and out-
door fan stop while
indoor fan operates.
During heating oper-
ation, all loads stop.
Please refer to
the malfunction
analysis (dis-
charge protec-
tion, overload)
Over-
current
protection
E5
Off 3S and
blink 5
times
Off 3S and
blink 5
times
During cooling and
drying operation,
compressor and out-
door fan stop while
indoor fan operates.
During heating oper-
ation, all loads stop.
1. Supply voltage
is unstable; 2.
Supply voltage
is too low and
load is too high;
3. Evaporator is
dirty
