Fujitsu AOY90 User Manual

LED display
Indoor
unit
Outdoor
unit
Remote
controller
PCB LED
1 to 6
Indoor unit electronic expansion
valve faulty.
Full closed state
When the relevant indoor unit
performs the cooling operation,
the compressor operates, but the
indoor unit discharge temperature
is not cool.
When the relevant indoor unit
performs the heating operation,
the compressor operates, but the
indoor unit discharge temperature
is not warm.
(cooling/heating pump type
operation is stopped, the liquid
pipe of the relevant indoor unit is
not warm. (At fully closed open
Coil resistance (red-white, red-
(Cooling/heating pump type only.)
When heating stops, and the
electronic expansion valve is fully
closed, the liquid refrigerant
collects at the stopped indoor unit
and the insufficient gas symptom
appears.
Normal
display
Normal
display
Normal
display
RB unit solenoid valve faulty. During heating operation, a
voltage (AC 220V) is applied to
indoor control PCB CN6(across
terminals 1-4), but the indoor unit
discharge temperature does not
During the cooling operation with
a faulty SVd, the gas pipe is cold.
Coil resistance :
1,200 ~ 1,500
During cooling operation, a
voltage(AC 220V) is applied to
indoor unit control PCB CN6
(across terminals 2-4), but the
indoor unit discharge temperature
does not become cool.
Outdoor unit electronic expansion
valve(EEV1, EEV2) opening
1.Fully closed state (Not opened)
When a voltage(AC220V) is
applied to the coil of the heat
exchange 4-way valve(4WV2,
4WV3, 4WV4) and to the heat
exchange solenoid valve(SV7,
SV8) corresponding to the
electronic expansion valve, the
electronic expansion valve outlet
pipe does not become cold.
During the heating operation,
when EEV1 and 2 are fully
closed, the low pressure and high
pressure both drop.
Coil resistance(red-white, red-
orenge, brown-blue, brown-
yellow):
There is no effective check At low outdoor temperatures,
cooling may become poor when
EEV1 or EEV2 is open excessi-
vely.
If the outdoor power supply is
reset 3~5 times, the electronic
expansion valve may return to
Coil resistance (red-white, red-
yellow):
Outdoor unit electronic expansion
valve(EEV1, EEV2) opening
2. Open excessively
Heating operation.
– 117 –
orange, brown-blue, brown-
yellow): 100~200
orange, brown-blue, brown-
(Not open)
SVd solenoid valve faulty.
RB unit solenoid valve faulty.
SVs solenoid valve faulty.
system only) when the heating
ing, the liquid pipe is cold.)
LCD
Body
LED
Symptom that
can occur other
than title
Check method
(Error state check method)
Remarks
Cause
become warm.
faulty.
faulty.
(fully open)
method.
170~210
normal opening.
170~210

Fujitsu AOY90 Specifications

General

Brand	Fujitsu
Model	AOY90
Category	Air Conditioner
Language	English