IVT AE-X12FR-N User Manual

AYXP12FRN
3 – 4
2. Outdoor unit
Heat exchanger
thermistor (TH2)
Cooling
Dehumidifying
Freeze preven-
tion
Indoor unit evap-
orator may
freeze.
Indoor unit evap-
orator may
freeze.
Compressor
stops occasion-
ally.
Compressor does
not operate.
Heating Cold air preven-
tion
Cold air preven-
tion deactivates
too soon and cold
air discharges.
Compressor
operates at low
speed or stops,
and frequency
does not
increase.
Cold air preven-
tion deactivates
too slow.
Cold air preven-
tion does not
deactivate, and
indoor unit fan
does not rotate.
Item Mode Control opera-
tion
When resis-
tance is low
(temperature
judged higher
than actual)
Short-circuit When resis-
tance is high
(temperature
judged lower
than actual)
Open-circuit
Compressor
chamber ther-
mistor (TH1)
Cooling
Dehumidifying
Heating
Expansion valve
control and com-
pressor protection
Compressor
operates, but
room does not
become cool or
warm (expansion
valve is open).
Compressor high
temperature error
indication.
Layer short-cir-
cuit or open-cir-
cuit may result in
compressor in
normal operation.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Heat exchanger
thermistor (TH2)
Cooling
Dehumidifying
Outdoor unit heat
exchanger over-
heat prevention
Compressor
operates at low
speed or stops.
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Normal operation. Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Heating Expansion valve
control
Defrosting
Defrosting opera-
tion is not acti-
vated as needed,
and frost accumu-
lates on outdoor
unit (expansion
valve is closed).
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Defrosting opera-
tion is activated
unnecessarily,
and room does
not become warm
(expansion valve
is open).
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Outside air tem-
perature ther-
mistor (TH3)
Auto Operation mode
judgment
Cooling mode is
activated even if
room tempera-
ture is low.
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Heating mode is
activated even if
room tempera-
ture is high.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Cooling
Dehumidifying
Operation not
affected
Normal operation. Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Normal operation. Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Heating Rating control
Defrosting
Defrosting opera-
tion is activated
unnecessarily.
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Defrosting opera-
tion is not acti-
vated, and frost
accumulates on
outdoor unit.
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Suction pipe ther-
mistor (TH4)
Cooling
Dehumidifying
Expansion valve
control
Compressor
operates, but
room does not
become cool
(expansion valve
is open).
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Frost accumu-
lates on evapora-
tor inlet section,
and room does
not become cool
(expansion valve
is closed).
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Heating Expansion valve
control
Compressor
operates, but
room does not
become warm
(expansion valve
is open).
Outdoor unit ther-
mistor short-cir-
cuit error
indication.
Frost accumu-
lates on expan-
sion valve outlet
section, and room
does not become
warm (expansion
valve is closed).
Outdoor unit ther-
mistor open-cir-
cuit error
indication.
Item Mode Control opera-
tion
When resis-
tance is low
(temperature
judged higher
than actual)
Short-circuit When resis-
tance is high
(temperature
judged lower
than actual)
Open-circuit

IVT AE-X12FR-N Specifications

General

Brand	IVT
Model	AE-X12FR-N
Category	Air Conditioner
Language	English