user manual

898841-UIM-B-0113
36 Johnson Controls Unitary Products
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 compres-
sor 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 loos-
ened 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,
compressor will stop while
indoor fan will operate;
during heating,the com-
plete unit will stop opera-
tion.
Replace outdoor control panel
AP1.
49
Frequency
limiting
(power).
OFF 3S
and blink
13 times
50
Compressor
is open-
circuited
OFF 3S
and blink
once
51
The
temperature
for turning on
the unit is
reached
OFF 3S
and blink
8 times
52
Frequency
limiting
(module
temperature)
OFF 3S
and blink
11 times
53
Normal com-
munication
Continously
54 Defrosting
OFF 3S
and blink
once
(during
blinking,
ON 10s
and OFF
0.5s)
OFF 3S
and blink
twice
Defrosting will occur in
heating mode. Compres-
sor will operate while
indoor fan will stop opera-
tion.
Its the normal state.
TABLE 12: Error Codes - 09K 12K (Continued)
No.
Malfunction
Name
Display Method of Indoor Unit Malfunction
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
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator