9.2 Error Code List
No.
Malfunction Name
Dual-
8 Code
Display
Display Method of Outdoor Unit
A/C status
Possible Causes
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Yellow
Indicator
Red
Indicator
Green
Indicator
1
High pressure
protection of
system
E1
During cooling and drying
operation, except indoor fan
operates, all loads stop operation.
During heating operation, the
complete unit stops.
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 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
Refrigerant
leakage
protection
F0
OFF 1s
and blink
9 times
The Dual-8 Code Display will
show F0 and the complete unit
stops.
1.Refrigerant leakage;
2.Indoor evaporator temperature
sensor works abnormally;
3.The unit has been plugged up
somewhere.
4
High discharge
temperature
protection of
compressor
E4
OFF 1s
and blink
7 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 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.
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
6
Communication
Malfunction
E6
Always
ON
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 1s
and blink
6 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 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 temperature
of module
EU
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
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.
7
7
Service Manual
Installation and Maintenance
