Sharp AE-X12FR Service Manual page 8

Status of Indication Malfunction
indoor/ by LED1 No. dis-
outdoor on out- played on
units door unit main unit
*2 display sec-
tion *1
Main
cate-
gory
Indoor/ 2 times 2
outdoor
units in
complete
shutdown
Indoor
unit in
operation
Outdoor
unit in
tempo-
rary stop
Indoor 3 times 3
unit in
operation
Outdoor
unit in
tempo-
rary stop
Indoor/ 5 times 5
outdoor
units in
complete
shutdown
Content of diagnosis
Sub- Main category Sub-category
cate-
gory
-0 Cycle tempera- Compressor high-
ture temperature error
-1 Temporary stop due
to compressor dis-
charge overheat *3
-2 Temporary stop due
to outdoor unit heat
exchanger overheat
*3
-3 Temporary stop due
to outdoor unit heat
exchanger overheat
*3
-4 Temporary stop due
to 2-way valve
freeze *3
-0 Dry operation Temporary stop due
to dehumidifying
operation *3
-0 Outdoor unit Heat exchanger
thermistor thermistor open-cir-
open-circuit cuit error
-1 Outside tempera-
ture thermistor
open-circuit error
-2 Suction thermistor
open-circuit error
-3 2-way valve ther-
mistor open-circuit
error
-4 Discharge ther-
mistor open-circuit
error
Inspection location/method
(1) Check the outdoor unit air
outlet for blockage.
(2) Check if the power supply
voltage is 90 V or higher at
full power.
(3) Check the pipe connec-
tions for refrigerant leaks.
(4) Measure resistance of the
outdoor unit compressor
thermistor.
(TH1: Approx. 53 kΩ at
25°C)
(5) Check the expansion
valve for proper operation.
(Temporary stop for cycle pro-
tection)
(Temporary stop for cycle pro-
tection)
(Temporary stop for cycle pro-
tection)
(Temporary stop for cycle pro-
tection)
(Temporary stop for cycle pro-
tection)
(1) Check connector CN8 of
the outdoor unit ther-
mistor for secure installa-
tion.
(2) Measure resistance of out-
door thermistors TH1 to
TH5.
(3) Check the lead wires of
thermistors TH1 through
TH5 on the outdoor unit
control PWB for open-cir-
cuit.
(4) No abnormality found in
above inspections (1)
through (3).
3 – 14
AYXP7FR
Remedy
(1) Ensure unobstructed
air flow from the out-
door unit air outlet.
(2) Connect power sup-
ply of proper voltage.
(3) Charge the specified
amount of refrigerant.
(4) Replace the outdoor
unit compressor ther-
mistor assembly.
(5) Replace the expan-
sion valve coil, expan-
sion valve or outdoor
unit control PWB
assembly.
–
–
–
–
–
(1) Correct the installa-
tion.
(2) Replace the outdoor
unit thermistor assem-
bly.
(3) Replace the outdoor
unit thermistor assem-
bly.
(5) Replace the outdoor
unit control PWB
assembly.