Sharp AY-XPC07PU, Service Manual

Page: 14 / 38

AY-XPC12PU
3 – 1
AHXPC12LV
5GTXKEG/CPWCN
CHAPTER 3.
TROUBLESHOOTING GUIDE
[1] SELF-DIAGNOSIS FUNCTION
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
The operation lamp (green), timer lamp (orange) and Plasmacluster lamp (blue) flash to indicate the information of malfunction.
If the power cord is unplugged or the circuit breaker is turned off, the self-diagnosis memory is lost.
<Display of self-diagnosis result>
The operation lamp (green) and the Plasmacluster lamp (blue) flash in synchronization with the timer lamp (orange).
Timer lamp (1 cycle)
ON
OFF
5-second OFF
1-second
OFF
1-second
OFF
1-second
OFF
1-second
OFF
1-second
ON
1-second
ON
1-second
ON
1-second
ON
1-second
ON
1st 2nd 3rd 4th 5th
1.DESCREPTION OF SELF-DIAGNOSIS FUNCTION
Remark
When reading the result of self-diagnosis, you shall combine it with outdoor unit indication in order to get a correct conclusion.
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(LED1)
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Normal
condition Normal
blinking
O O O O O Timer (Orange)
0 0 Normal
Operation (Green)
Plasmacluster (Blue)
Indoor and
outdoor units
do not oper-
ate. 1-time
O O O O O Timer (Orange)
1 0 Outdoor unit
thermistor
short-circuit Heat exchanger
thermistor short
circuit error 1) Measure the resistance
of the outdoor unit
thermistors.
2) Check the lead wire
of the outdoor unit
thermistor for torn
sheath and shortcircuit.
3) 1) 2):Normal
1) Replace the outdoor
unit thermistor
assembly.
2) Replace the outdoor
unit thermistor
assembly.
3) Replace the outdoor
unit control PCB
assembly.
O Operation (Green)
Plasmacluster (Blue)
O O O O O Timer (Orange)
1 Outdoor temperature
thermistor short
circuit error
O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange)
2 Suction thermistor
short circuit error
O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange)
3 Suction thermistor
(for unit A, B, C)
short circuit error
O Operation (Green)
O O Plasmacluster (Blue)
2.CHART FOR READING SELF-DIAGNOSIS RESULT
Operation lamp(Green)
Timer lamp(orange)
Plasmacluster lamp(Blue)
AUX