Ʋƶ
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
Oper-
ation
Indicator
Cool
Indica-
tor
Heat-
ing
Indica-
tor
Yellow
Indica-
tor
Red
Indica-
tor
Green
Indicator
44
Malfunction of
phase current
detection
circuit for
compressor
U1
OFF 3S
and
blink
13
times
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
45
Malfunction of
voltage
dropping for
DC bus-bar
U3
OFF 3S
and
blink
20
times
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
46
Malfunction
of complete
units current
detection
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.
Theres circuit malfunction on
outdoor units control panel AP1,
please 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.
48
Zerocrossing
malfunction of
outdoor unit
U9
OFF 3S
and
blink
18 times
During cooling operation,
compressor will stop while
indoor fan will operate; during
heating,the complete unit will
stop operation.
Replace outdoor control panel
AP1
49
Frequency
limiting
(power)
OFF 1S
and
blink
13
times
50
Compressor
running
OFF 1S
and
blink
once
51
The
temperature
for turning
on the unit is
reached
OFF 1S
and
blink
8 times
52
Frequency
limiting
(module
temperature)
OFF 1S
and
blink
11 times
53
Normal
communication
OFF
0S and
blink
twice
54
Defrosting
OFF 3S
and
blink
once
(during
blink-
ing,
ON 10s
and
OFF
0.5s)
OFF 1S
and
blink
twice
Defrosting will occur in
heating
mode. Compressor will
operate
while indoor fan will stop
operation.
Its the normal state