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Display Method of Indoor Unit
Indicator Display (during
Malfunction
blinking, ON 0.5s and OFF
Dual-8
NO.
Name
0.5s)
Code
Display
Operation
Indicator
High
OFF 3s
pressure
1
E1
and blink
protection of
once
system
OFF 3S
Antifreezing
2
E2
and blink
protection
twice
System block
OFF 3S
3
or refrigerant
E3
and blink
leakage
3 times
High
discharge
OFF 3S
4
temperature
E4
and blink
protection of
4 times
compressor
OFF 3S
Overcurrent
and blink
5
E5
protection
5
times
OFF 3S
Communi-
and blink
6
cation
E6
6
Malfunction
times
High
OFF 3S
temperature
and blink
7
E8
resistant
8
protection
times
EEPROM
8
EE
malfunction
Limit/
decrease
frequency
9
EU
due to high
temperature
of module
Malfunction
OFF 3S
10
protection of
C5
and blink
jumper cap
15 times
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
Cool
Heating
Yellow
Red
Indicator
Indicator
Indicator
Indicator
OFF 3S
and blink
3 times
OFF 3S
blink
9 times
OFF 3S
and blink
7 times
OFF 3S
and blink
5 times
OFF 3S
and blink
6 times
OFF 3S
OFF 3S
and blink
and blink
15 times
11 times
OFF 3S
OFF 3S
and blink
and blink
6 times
6 times
A/C status
Green
Indicator
During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
The Dual-8 Code Display will
and
show E3 until the low pressure
switch stop operation.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
During cooling operation,
compressor stops while
OFF
indoor fan motor operates.
During heating operation, the
complete unit stops.
During cooling operation:
compressor will stop while
indoor fan will operate.
During heating operation, the
complete unit stops.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally,
while
operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
not dispose the related
command
Possible Causes
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including
and bad radiating environment );
Ambient temperature is too high.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
1.Low-pressure protection
2.Low-pressure protection of
system
3.Low-pressure protection of
compressor
Please refer to the malfunction
analysis (discharge protection,
overload).
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
Refer to the corresponding
malfunction analysis.
Refer to the malfunction analysis
(overload, high temperature
resistant).
Replace outdoor control panel AP1
Discharging after the complete unit
is de-energized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
the radiator is inserted tightly.
If its no use, please replace control
panel AP1.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
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