41
Installation and Maintenance
Service Manual
9.2 Error Code List
No.
Malfunction
Name
Display Method of Indoor Unit
Display Method of Outdoor
Unit
(Indicator has 3 kinds of
display status and they
will be displayed circularly
every 5s.)
A/C status
Possible Reasons
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
ƶ
OFF
Ƶ
Illuminated
ƿ
Blink
Operation
Indicator
Cool
Indicator
Heating
Indicator
D5
(D40)
D6
(D41)
D16
(D42)
D30
(D43)
1
Antifreezing
protection
E2
OFF 3S
and blink
twice
Ƶ
ƶ
Ƶ
ƶ
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.
2
High
discharge
temperature
protection of
compressor
E4
OFF 3S
and blink
4
times
Ƶ
ƶ
Ƶ
ƿ
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).
3
Overcurrent
protection
E5
OFF 3S
and blink
5
times
ƶ
Ƶ
ƿ
ƶ
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.
4
Communi-
cation
Malfunction
E6
OFF 3S
and blink
6
times
ƶ
ƶ
ƶ
ƿ
During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation,
the complete unit stops.
Refer to the
corresponding
malfunction analysis.
5
High
temperature
resistant
protection
E8
OFF 3S
and blink
8
times
Ƶ
ƶ
Ƶ
Ƶ
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).
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