10
AY-X36RU
AE-X36RU
TROUBLESHOOTING
[1] Error Code List
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 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
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
1
High pressure
protection of
system
E1
OFF 3s
and blink
once
During cooling and drying opera-
tion, except indoor fan operates, all
loads stop operation. During heat-
ing operation, the complete unit
stops.
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including
fifth 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 opera-
tion, 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 of
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
7 times
During cooling and drying opera-
tion, compressor and outdoor fan
stop while indoor fan operates.
During heating operation, all loads
stop.
Please refer to the malfunction
analysis (discharge protection, over-
load).
5
Over current
protection
E5
OFF 3S
and blink
5 times
OFF 1S
and blink
5 times
During cooling and drying opera-
tion, 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
Communica-
tion Malfunc-
tion
E6
OFF 3S
and blink
6 times
Always
ON
During cooling operation, compres-
sor stops while indoor fan motor
operates. During heating operation,
the complete unit stops.
Refer to the corresponding malfunc-
tion analysis.
7
High tempera-
ture resistant
protection
E8
OFF 3S
and blink
8 times
OFF 1S
and blink
6 times
During cooling operation: compres-
sor will stop while indoor fan will
operate.
During heating operation, the com-
plete unit stops.
Refer to the malfunction analysis
(overload, high temperature resis-
tant).
8
EEPROM mal-
function
EE
OFF 3S
and blink
15 times
OFF 1S
and blink
11 times
During cooling and drying opera-
tion, 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
OFF 3S
and blink
6 times
OFF 3S
and blink
6 times
All loads operate normally, while
operation frequency for compres-
sor 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 ahether 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 but-
ton are effective, but can not dis-
pose the related command
1. No jumper cap insert on main
board.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
main board.
11
Gathering
refrigerant
Fo
OFF 3S
and blink
1 times
OFF 3S
and blink
1 times
OFF 1S
and blink
17 times
When the outdoor unit receive sig-
nal of Gathering refrigerant
,the system will be forced to run
under cooling mode for gathering
refrigerant
Nominal cooling mode
12
Indoor ambient
temperature
sensor is open/
short circuited
F1
OFF 3S
and blink
once
During cooling and drying opera-
tion, indoor unit operates while
other loads will stop; during heating
operation,
the complete unit will stop opera-
tion.
1. Loosening or bad contact of
indoor ambient temp. sensor and
main board terminal.
2. Components in main board fell
down leads short circuit.
3. Indoor ambient temp. sensor
damaged.(check with sensor
resistance value chart)
4. Main board damaged.
13
Indoor evapo-
rator tempera-
ture sensor
is open/short
circuited
F2
OFF 3S
and blink
twice
AC stops operation once reaches
the setting temperature. Cooling,
drying: internal fan motor stops
operation while other loads stop
operation; heating: AC stop opera-
tion
1. Loosening or bad contact of
Indoor evaporator temp. sensor
and main board terminal.
2. Components on the main board
fall down leads short circuit.
3. Indoor evaporator temp. sensor
damaged.(Check temp. sensor
value chart for testing)
4. Main board damaged.
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