Sharp AE-X15PU, Service Manual

Page: 29 / 46

AE-X15PU
3 – 13
[9] CHART
<INDOOR UNIT> ○:1-second ON / 1-second OFF
Problem
symptom
Outdoor
unit
indication
(LED1)
Indoor unit
M
al
f
unction
No.*
Content of diagnosis Check point Action
→ Lamp Main Sub Main Sub
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 hermistor
short circuit error
O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange)
3 Suction hermistor
(for unit A, B, C)
short circuit error
O Operation (Green)
O O Plasmacluster (Blue)
Indoor and
outdoor units
do not
operate. 2-time
O O O O O Timer (Orange)
2 0 Cycle
temperature Compressor high
temperature error 1) Check the outdoor unit
air outlet for blockage.
2) Check if the power
supply voltage is AC
230V at full power.
3) Check the pipe
connections for
refrigerant leaks.
4) Measure resistance
of the outdoor unit
compressor thermistor.
5) Check the expansion
valve for proper
opera ion.
1) Ensure unobstructed
outdoor unit air
ou let.
2) Connect power
supply of proper
voltage.
amount of refriger-
ant.
4) Replace he outdoor
unit compressor
thermistor assem-
bly.
5) Replace he expan-
sion valve coil,
expansion valve or
outdoor unit control
PCB assembly.
O Operation (Green)
Plasmacluster (Blue)
Indoor unit
operates.
Outdoor
unit does
not operate
temporarily O O O O O Timer (Orange) 1 Compressor
discharge overheat. (Temporary stop for cycle
protection) -
O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 2 Outdoor unit heat
exchanger overheat. (Temporary stop for cycle
protection) -
O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 3 Indoor unit heat
exchanger overheat. (Temporary stop for cycle
protection) -
O Operation (Green)
O O Plasmacluster (Blue)
O O O O O Timer (Orange) 4 IPM high
temperature error Measure resistance of the
heat-sink hermistor. -
O Operation (Green)
O Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate. O O O O O
O O O O O
O O
Timer (Orange) 5 IPM high
temperature error Replace the outdoor unit
control PCB assembly. -
O Operation (Green)
O O Plasmacluster (Blue)
Plasmacluster (Blue)
Indoor unit
operates.
Outdoor
unit does
not operate
temporarily.
3-time Timer (Orange)
tion
Temporary stop
due to dehumidi-
fying opera ion
(Temporary stop for
cycle protection)
-
Operation (Green)
3 0 Dry opera-
Heat
operation
5
℉
/-15
℃
AUTO OFF
Measure the resistance
of outdoor temperature
thermister.
Replace the indoor
unit thermister ass-
embly.