89 PB
TROUBLESHOOTING
Diagnostic Codes
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
Indica-
tor
Heating
Indicator
Yellow
Indicator
Red Indi-
cator
Green
Indicator
36 module
temperate is
too high
H5 OFF 3s
and blink
5 times
OFF 1s
and blink
10 times
37 internal
motor ( fan
motor) does
not operate
H6 OFF 3s
and blink
11 times
Internal fan motor, external
fan motor, compressor
and electric heater stop
operation,guide louver
stops at present location.
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3.Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard
rev detecting circuit.
38 desynchro-
nizing of
compressor
H7 OFF 3s
and blink
7 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis (IPM protec-
tion, loss of synchronism
protection and overcurrent
protection of phase current
for compressor.
39 PFC protec-
tion
HC OFF 3s
and blink
6 times
OFF 1s
and blink
14 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis
40 outdoor DC
fan motor
malfunction
L3 OFF 3s
and blink
23 times
OFF 1s
and blink
14 times
Outdoor DC fan motor mal-
function lead to compressor
stop operation,
DC fan motor malfunction
or system blocked or the
connector loosed
41 power
protection
L9 OFF 3s
and blink
20 times
OFF 1s
and blink
9 times
compressor operation
stops and Outdoor fan
motor will stop 30s later , 3
minutes later fan motor and
compressor will restart
To protect the electronical
components when detect
high power
42 indoor unit
and outdoor
unit don’t
match
LP OFF 3s
and blink
19 times
OFF 1s
and blink
16 times
compressor and Outdoor
fan motor don’t work
Indoor unit and outdoor unit
don’t match
43 failure start
up
LC OFF 3s
and blink
11 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis
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