Fujitsu AOY90 User Manual

LED display
Indoor
unit
Outdoor
unit
Remote
controller
PCB LED
1 to 6
Normal
display
Normal
display
Filter
display
Filter clogged Check if the filter is dirty.
Controlling
(Operation
display LED
flashes)
(Oil recovery
operation)
Normal
display
Error
display
(Indoor unit
fan error)
Normal
display
Error
display
(Indoor unit
fan error)
Error
display
error)
Error
display
Normal
display
Normal
display
or
error
display
temperature
error)
Normal
display
Abnomal noise
coming from
5
COM
4
HIG
6
SUB
2
MID
CN4
(Indoor unit
error)
(Thermistor
Error
display
(Discharge
– 115–
MOTOR COIL
Body
LED
LCD
Symptom that
can occur other
than title
Check method
(Error state check method)
Remarks
Cause
display
Controlling
display
error)
(Thermistor
Indoor unit
makes an
abnormal
sound.
System does
not cool/heat.
When the indoor unit fan motor
The starting time is reset by
starting time exceeds 150 hours,
the filter cleaning display appears
at the wired remote controller.
pressing the ZONE/SET button
of the wired remote controller
for 3 seconds or more and is
performed side-by-side with
ZONE setting.
At filter change display, the set
temperature display flashes
at a 1 second ON, 1 second
Oil recovery operation being
controlled.
All indoor unit fans stop and
signal not received during
operation.
After the initial hour after the
Operation display LED flashes
outdoor unit power was turned
on, the oil recovery operation is
performed every 6 hours without
regard to the operating state of
at a 3 seconds ON, 1 second
OFF cycle.
Check the resistance value of
the capacitor.
(If normal, the resistance will
show a value of several hundred
kilohms.)
Indoor fan capacitor faulty.
Indoor fan motor faulty.
Indoor unit thermistor faulty.
AB30-54(large ceiling suspended
type) are error display.
(Others are normal display.)
Check the fan motor resistance
values (4-5, 5-6).
Measure the thermistor
resistance and compare it to
the ambient temperature.
Refer to the service manual
(section 8-5-1) for the
temperature and thermistor
resistance relationship.
When thermistor shorted
or open.
Indoor unit short circuit.
Indoor control PCB faulty.
Outdoor control PCB faulty.
System does
not cool/heat.
System does
not cool/heat.
Indoor unit
makes an
abnormal
sound.
System does
not cool/heat.
indoor unit.
Cannot be
specified.
(Cannot be
specified.)
Cannot be
specified.
(Cannot be
specified.)
Cannot be
specified
Air discharged from an indoor
unit is sucked directly into the
same indoor unit or into another
indoor unit.
Symptom has many branches,
depending on the error contents,
and there is no effective check
method.
When a PCB or connection wire
is faulty, the trouble is often
corrected by changing the PCB.
When a PCB or connection wire
is faulty, the trouble is often
corrected by changing the PCB.
Symptom has many branches,
depending on the error contents,
and there is no effective check
method.
No display
error
display
or
No display
error
display
or
(Cannot be
specified.)
No display
error
display
or
OFF cycle.
the indoor unit.

Fujitsu AOY90 Specifications

General

Brand	Fujitsu
Model	AOY90
Category	Air Conditioner
Language	English