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