No.
Malfunction Name
Dual-
8 Code
Display
Display Method of Outdoor Unit
A/C status
Possible Causes
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Yellow
Indicator
Red
Indicator
Green
Indicator
30
Module high
temperature
protection
P8
"During cooling
operation,compressor will stop
while indoor fan will operate;
During heating operation,the
complete unit will stop"
After the complete unit is
deenergized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
panel AP1 is sufficient and
whether the radiator is inserted
tightly. If its no use, please replace
control panel AP1.
31
Overload
protection for
compressor
H3
OFF 1s
and blink
8 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(overload, high
temperature resistant)
32 IPM protection
H5
OFF 1s
and blink
4 times
"During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation,the
complete unit will stop operation."
33
Module
temperature is too
high
H5
OFF 1s
and blink
10 times
1. Wiring terminal OVC-COMP
is loosened. In normal state, the
resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction
analysis(discharge protection,
overload)
34
Internal motor(fan
motor) do not
operate
H6
Internal fan motor, external fan
motor, compressor and electric
heater stop operation,guide louver
stops at present location.
Refer to the malfunction
analysis(overload, high
temperature resistant)
35
Desynchronizing
of compressor
H7
"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 protection,loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
36 PFC protection
HC
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."
37
Outdoor DC fan
motor malfunction
L3
OFF 1s
and blink
14 times
Outdoor DC fan motor malfunction
lead to compressor stop operation
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 power protection
L9
OFF 1s
and blink
9 times
compressor stop operation and
Outdoor fan motor will stop 30s
latter,3 minutes latter fan motor
and compressor will restart
Refer to the malfunction
analysis (IPM protection,loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
39
Indoor unit and
outdoor unit
doesn't match
LP
OFF 1s
and blink
16 times
compressor and Outdoor fan
motor can’t work
Refer to the malfunction analysis
40
Failure startup
LC
"During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation,the
complete unit will stop operation."
DC fan motor malfunction or
system blocked or the connector
loosed
Service Manual
80
Installation and Maintenance
