ƲƱ
ƴ
.
Troubleshooting
ƴ
.1 Flashing LED of Indoor/Outdoor Unit and Primary
<Ƭ½±Þ±àĀ
No.
Malfunction
Name
Display Method of Indoor Unit
Display Method of 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
Oper-
ation
Indicator
Cool
Indica-
tor
Heat-
ing
Indica-
tor
Yellow
Indica-
tor
Red
Indica-
tor
Green
Indicator
1
High
Pessure
Proction
of system
E1
OFF 3s
andblink
once
During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops.
Possible reasons:
1. Refrigerant was superabundant
2. Poor heat exchange (including
filth blockage of heat exchanger
and bad radiating environment);
Ambient temperature is too high.
2
Antifreezing
Protection
E2
OFF
3s and
blink
twice
Off 1s
and
blink 3
times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
3
In defect or
refrigerant
F0
OFF
1s and
blink 9
times
The Dual-8 Code Display will
show F0 and the complete unit
stops.
1.In defect of refrigerant;
2.Indoor evaporator temperature
sensor works abnormally;
3.The unit has been plugged up
somewhere.
4
High discharge
temperature
protection of
compressor
E4
OFF
3s and
blink 4
times
OFF
1s and
blink 5
times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Please refer to the malfunction
analysis (discharge protection,
overload).
5
Overcurrent
Protection
E5
OFF
3s and
blink 5
times
Always
ON
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
6
Communication
Malfunction
E6
OFF
3s and
blink 6
times
OFF
1S and
blink 6
times
During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation, the
complete unit stops.
Refer to the corresponding
malfunction analysis.
7
High
Temperature
resistant
protection
E8
Off 3s
and
blink 6
times
OFF
1S and
blink 11
times
During cooling operation:
compressor will stop while
indoor fan will operate.
During heating operation, the
complete unit stops.
Refer to the malfunction analysis
(overload, high temperature
resistant).
8
EEPROM
malfunction
EE
Off 3s
and
blink
15
times
Off 1s
and
blink 11
times
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel
AP1
9
Limit/
Decrease
frequency due to
high tempera-
ture of module
EU
OFF
3s and
blink 6
OFF
3s
and
blink 6
times
All loads operate normally,
while
operation frequency for
compressor is decreased
Discharging after the complete
unit
is de-energized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
panel AP1 is sufficient and
whether the radiator is inserted
tightly. If its no use, please replace
control panel AP1.
10
Malfunction
protection of
jumper cap
C5
OFF
3S and
blink 15
times
Wireless remote receiver and
button are effective, but can
not dispose the related
command
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
