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116 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
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
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 connec‑
tor loosed
41 power protec‑
tion
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 op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation.
Refer to the malfunction
analysis
44 malfunction
of phase
current detec‑
tion circuit for
compressor
U1 OFF 3s
and blink
13 times
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
45 malfunction
of voltage
dropping for
DC bus bar
U3 OFF 3s
and blink
20 times
During cooling and drying op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Supply voltage is unstable
46 malfunction
of complete
units current
detention
U5 OFF 3s
and blink
13 times
During cooling and drying
operation, the compressor
will stop while indoor fan will
operate;
During heating operating,
the complete unit will stop
operation.
There’s a circuit malfunction
on outdoor units control panel
AP1, replace the outdoor units
control panel AP1.
47 the four‑way
valve is
abnormal
U7 OFF 3s
and blink
20 times
If this malfunction occurs
during heating operation,
the complete unit will stop
operation.
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is
loosened or broken;
3.4V is damaged, please
replace 4V.
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