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Display Method of Indoor Unit
Malfunction
Name
Indicator Display (during blinking,
ON 0.5s and OFF 0.5s)
Dual-8
No.
Code
Display
Operation
Overload
23
protection
for
H3
compressor
System
is
24
H4
abnormal
25 IPM protection
H5
26 PFC protection
HC
Desynchronizing
27
H7
of compressor
Decrease
frequency due to
high
28
temperature
H0
resistant during
heating
operation
29 Failure start-up
Lc
Malfunction
of
phase
current
30
U1
detection circuit
for compressor
EEPROM
31
EE
malfunction
Charging
32
malfunction
of
PU
capacitor
Display
Outdoor Unit
Indicator has 3 kinds of
display status and they
will
circularly every 5s.
OFF
COOL
Heating
D40 D41 D42 D43
Indicator
Indicator
Indicator
OFF
3S
and blink
3 times
OFF
3S
and blink
4 times
OFF
3S
and blink
5 times
OFF
3S
and blink
6 times
OFF
3S
and blink
7 times
OFF
3S
and blink
10 times
OFF
3S
and blink
11 times
OFF
3S
and blink
13 times
OFF
3S
and blink
15 times
OFF
3S
and blink
17 times
Method
of
be
displayed
A/C status
ON
Blink
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
All loads operate normally, while
operation
frequency
compressor is decreased
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop operation.
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop
During
cooling
operation, compressor will stop
while indoor fan will operate;
During
heating operation, the
complete unit will stop
Possible Reasons
1. Wiring terminal OVC-COMP is loosened. In
and
drying
normal state, the resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis ( discharge
protection, overload)
and
drying
Refer to the malfunction analysis (overload, high
temperature resistant)
and
drying
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
and
drying
Refer to the malfunction analysis
and
drying
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
Refer to the malfunction analysis (overload, high
for
temperature resistant)
and
drying
Refer to the malfunction analysis
and
drying
Replace outdoor control panel AP1
and
drying
Replace outdoor control panel AP1
and
drying
Refer to the part three—charging malfunction
analysis of capacitor
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