AY-X36RU
AE-X36RU
13
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 blink-
ing, ON 0.5s and OFF 0.5s)
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
43 Failure start-
up
LC
OFF 3S
and blink
11 times
During cooling and drying opera-
tion, compressor will stop while
indoor fan will operate; During
heating operation, the complete
unit will stop operation.
Refer to the malfunction analysis
45
Malfunction of
voltage drop-
ping for DC
bus-bar
U3
OFF 3S
and blink
20 times
During cooling and drying opera-
tion, 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 detec-
tion
U5
OFF 3S
and blink
13 times
During cooling and drying opera-
tion, the compressor will stop while
indoor fan will operate;
During heating operating, the com-
plete unit will stop operation.
There’s circuit malfunction on out-
door units control panel AP1, please
replace the outdoor units control
panel AP1.
47
The four-way
valve is abnor-
mal
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
Zero- crossing
malfunction of
outdoor unit
U9
OFF 3S
and blink
18 times
During cooling operation, compres-
sor will stop while indoor fan will
operate; during heating,the com-
plete unit will stop operation.
Replace outdoor control panel AP1
49 Frequency lim-
iting (power)
OFF 1S
and blink
13 times
50 Compressor
running
OFF 1S
and blink
once
51
The tempera-
ture for turning
on the unit is
reached
OFF 1S
and blink
8 times
52
Frequency lim-
iting (module
temperature)
OFF 1S
and blink
11 times
53 Normal com-
munication
OFF 0.5S
and blink
once
54 Defrosting
OFF 3S
and blink
once (dur-
ing blink-
ing, ON
10s and
OFF 0.5s)
OFF 1S
and blink
twice
Defrosting will occur in heating
ode. Compressor will operate while
indoor fan will stop operation.
Its the normal state
