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114 PB
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 blinking,
ON 0.5s and OFF 0.5s)
Indicator has 3 kinds of display status
and during blinking, ON 0.5s and
OFF 0.5s
Power
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
26 compressor
intermediate
frequence in
test state
P3 during
blinking
ON and
0.25s and
OFF and
0.25s
during
blinking
ON and
0.25s and
OFF and
0.25s
Showing during middle cool‑
ing or middle heating test
27 overcurrent
protection of
phase current
for compres‑
sor
P5 OFF 3s
and blink
15 times
During cooling and drying op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection
and overcurrent protection of
phase current for compres‑
sor).
28 charging
malfunction
of capacitor
PU OFF 3s
and blink
17 times
During cooling and drying op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Refer to the part three—charg‑
ing malfunction analysis of
capacitor
29 malfunction
of module
temperature
sensor circuit
P7 OFF 3s
and blink
18 times
s During cooling and drying op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control
panel AP1
30 module high
temperature
protection
P8 OFF 3s
and blink
19 times
During cooling operation,
compressor will stop while
indoor fan will operate;
During heating operation, the
complete unit will stop
After the complete unit is de‑
energized for 20mins, check
whether the thermal grease
on IPM Module of outdoor
control panel AP is sufficient
and whether the radiator is
inserted tightly. If no faults
found, replace control panel
AP1
31 decrease
frequency
due to high
temperature
resistant dur‑
ing heating
operation
H0 OFF 3s
and blink
10 times
All loads operate normally,
while
operation frequency for
compressor is decreased
Refer to the malfunction
analysis (overload, high
temperature resistant)
32 static dedust‑
ing protection
H2 OFF 3s
and blink
twice
TROUBLESHOOTING
Diagnostic Codes
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