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IVT Manuals
Air Conditioner
AY-XP12JHR-N
Service manual
IVT AY-XP12JHR-N Service Manual page 26
Split type room air conditioners
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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2. Outdoor unit
Item
Mode
Compressor
Cooling
chamber ther-
Dehumidifying
mistor (TH1)
Heating
Heat exchanger
Cooling
thermistor (TH2)
Dehumidifying
Heating
Outside air tem-
Auto
perature ther-
mistor (TH3)
Cooling
Dehumidifying
Heating
Suction pipe ther-
Cooling
mistor (TH4)
Dehumidifying
Heating
2-way valve ther-
Cooling
mistor (TH5)
Dehumidifying
Heating
Control opera-
When resis-
tion
tance is low
(temperature
judged higher
than actual)
Expansion valve
Compressor
control and com-
operates, but
pressor protection
room does not
become cool or
warm (expansion
valve is open).
Outdoor unit heat
Compressor
exchanger over-
operates at low
heat prevention
speed or stops.
Expansion valve
Defrosting opera-
control
tion is not acti-
Defrosting
vated as needed,
and frost accumu-
lates on outdoor
unit (expansion
valve is closed).
Operation mode
Cooling mode is
judgment
activated even if
room tempera-
ture is low.
Operation not
Normal operation.
affected
Rating control
Defrosting opera-
Defrosting
tion is activated
unnecessarily.
Expansion valve
Compressor
control
operates, but
room does not
become cool
(expansion valve
is open).
Expansion valve
Compressor
control
operates, but
room does not
become warm
(expansion valve
is open).
Expansion valve
Frost accumu-
control
lates on indoor
unit evaporator
and room does
not become cool
(expansion valve
is closed).
Operation not
Normal operation.
affected
3 – 4
Short-circuit
When resis-
tance is high
(temperature
judged lower
than actual)
Compressor high
Layer short-cir-
temperature error
cuit or open-cir-
indication.
cuit may result in
compressor in
normal operation.
Outdoor unit ther-
Normal operation.
mistor short-cir-
cuit error
indication.
Outdoor unit ther-
Defrosting opera-
mistor short-cir-
tion is activated
cuit error
unnecessarily,
indication.
and room does
not become warm
(expansion valve
is open).
Outdoor unit ther-
Heating mode is
mistor short-cir-
activated even if
cuit error
room tempera-
indication.
ture is high.
Outdoor unit ther-
Normal operation.
mistor short-cir-
cuit error
indication.
Outdoor unit ther-
Defrosting opera-
mistor short-cir-
tion is not acti-
cuit error
vated, and frost
indication.
accumulates on
outdoor unit.
Outdoor unit ther-
Frost accumu-
mistor short-cir-
lates on evapora-
cuit error
tor inlet section,
indication.
and room does
not become cool
(expansion valve
is closed).
Outdoor unit ther-
Frost accumu-
mistor short-cir-
lates on expan-
cuit error
sion valve outlet
indication.
section, and room
does not become
warm (expansion
valve is closed).
Outdoor unit ther-
Compressor
mistor short-cir-
operates, but
cuit error
room does not
indication.
become cool
(expansion valve
is open).
Outdoor unit ther-
Normal operation.
mistor short-cir-
cuit error
indication.
AYXP12JHRN
Open-circuit
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
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Table of Contents
Troubleshooting
HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY
28
TROUBLESHOOTING GUIDE
35
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