NO.
Malfunction
Name
Display Method of Indoor Unit
A/C status
Possible Causes
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation
Indicator
Cool
Indicator
Heating
Indicator
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.
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.
35
Desynchro-
nizing 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
Outdoor DC
fan motor
malfunction
L3
Outdoor DC fan motor malfunction
lead to compressor stop operation,
DC fan motor malfunction or system
blocked or the connector loosed
37 power
protection
L9
compressor stop operation and
Outdoor fan motor will stop 30s latter
, 3 minutes latter fan motor and
compressor will restart
To protect the electronical components
when detect high power
38
Indoor unit
and outdoor
unit doesnt
match
LP
compressor and Outdoor fan motor
can't work
Indoor unit and outdoor unit doesnt
match
39 Failure
start-up
LC
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 Defrosting
Heating
indicator
off for
0.5s and
then
blinks for
10s
Not the error code. It’s the status code
for the operation
41
Malfunction
of phase
current
detection
circuit for
compressor
U1
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel AP1
42
Malfunction
of voltage
dropping for
DC bus-bar
U3
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Supply voltage is unstable
41
