Sharp AE-X4M30PU, Service Manual

Page: 17 / 42

AE-X4M30PU
17
<INDOOR UNIT> ○:1-second ON / 1-second OFF
Problem
symptom
Outdoor unit
indication
(LED1)
Indoor unit
Malfunction
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.
(TH2-4, 6-8: Approx. 4.4kΩ at
77 °F( 25 ° C))
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, D)
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.
(TH1:Approx.50kΩ at 77
°F( 25 ° C)
5) Check the expansion valve
for proper operation.
1) Ensure unobstructed air
flow from the outdoor
unit air outlet.
2) Connect power supply
of proper voltage.
3) Charge the specified
amount of refrigerant.
4) Replace the outdoor unit
compressor thermistor
assembly.
5) Replace the expansion
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 thermistor. -
O Operation (green)
O Plasmacluster (blue)
Indoor and
outdoor
units do not
operate. 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)
O O O O O Timer (Orange) 7 High pressure error Check pressure sensor -
O Operation (green)
O O O Plasmacluster (blue)
Indoor and
outdoor
units do not
operate. 3 time O O O O O Timer (Orange) 3 0 Temporary
stop Temporary stop due
to low temperature
of out door (Temporary stop for cycle
protection) If the temperature of
outdoor is not lower than
5°F(-15°C), check the
outdoor temp. thermistor.
O O Operation (green)
Plasmacluster (blue)
Indoor and
outdoor
units do not
operate. 5-time O O O O O Timer (Orange) 5 0 Outdoor unit
thermistor
open-circuit Heat exchanger
thermistor open
circuit error 1) Check connector CN8A
and CN8C of the outdoor
unit thermistor for secure
installation.
2) Measure resistance of
outdoor thermistors TH1-
4, 6-8.
3) Check the lead wires of
thermistors TH1- 4, 6-8
on the outdoor unit control
PCB for open-circuit.
4) 1) 2) 3):Normal
1) Correct the installation
2) Replace the outdoor unit
thermistor assembly.
3) Replace the outdoor unit
thermistor assembly.
4) Replace the outdoor unit
control PWB assembly.
O O Operation (green)
Plasmacluster (blue)
O O O O O Timer (Orange) 1 Outdoor temperature
thermistor open
circuit error
O O Operation (green)
O Plasmacluster (blue)
O O O O O Timer (Orange) 2 Suction thermistor
open circuit error
O O Operation (green)
O Plasmacluster (blue)
O O O O O Timer (Orange) 3 Suction thermistor
(for unit A, B, C, D)
open circuit error
O O Operation (green)
O O Plasmacluster (blue)
O O O O O Timer (Orange) 4 Discharge thermistor
open circuit error
O O Operation (green)
O Plasmacluster (blue)
O O O O O Timer (Orange) 5 Heat sink thermistor
open circuit error
O O Operation (green)
O O Plasmacluster (blue)