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
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"
To protect the electronical
components when detect high
power
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"
Indoor unit and outdoor unit
doesn't match
43
Malfunction of
complete units
current detection
U5
"During cooling and drying
operation,the compressor will stop
while indoor fan will operate;
During heating operating,the
complete unit will stop operation."
Refer to the malfunction analysis
44
The four-way
valve is abnormal
U7
If this malfunction occurs during
heating operation, the complete
unit will stop operation.
Replace outdoor control panel
AP1
45
Frequency
limiting(power)
OFF 1s
and blink
13 times
Supply voltage is unstable
46
Compressor
running
OFF 1s
and blink
once
Theres circuit malfunction on
outdoor units control panel
AP1,please replace the outdoor
units control panel AP1.
47
The temperature
for turning on the
unit is reached
OFF 1s
and blink
8 times
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened
or broken;
3.4V is damaged, please replace
4V.
48
Frequency
limiting(module
temperature)
OFF 1s
and blink
11 times
Replace outdoor control panel
AP1
49
Normal
communication
OFF 0.5s
and blink
once
50
Defrosting
(Heating indicator
ON 10s OFF 0.5s)
Defrosting will occur in heating
mode.Compressor will operate
while indoor fan will stop
operation.
51
Malfunction
of detecting
plate(WIFI )
JF
Refer to the malfunction analysis
81
Service Manual
Installation and Maintenance
