Fujitsu AOY90 User Manual

ERROR
CONTENTS
ERROR CAUSE
REMEDY
ERROR
CODE
Compressor 2
error
1. Check for loose or dislodged discharge
temperature sensor THD2 sensor wiring
and check sensor resistance. If
abnormal, replace sensor.
2. Check compressor power relay 2. If
abnormal, replace power relay.
3. Check CN33 (compressor 2) 12V
voltage output on outdoor unit control
PC board. If abnormal, replace PC
board.
4. Check magnetic contactor 2. If
abnormal, replace contactor.
5. Check additional refrigerant amount
and recharge suitable refrigerant.
6. Temporary data transmission trouble
due to affect of noise, etc. Operation is
not affected.
7. Compressor overload operation.
Check "High-pressure error". Motor
protector reset at 61 C +/-9 C.
8. Check compressor. If faulty, replace
compressor.
1. Discharge temperature sensor
THD2 faulty.
3. Outdoor unit control PC board
faulty.
4. Magnetic contactor 2 faulty.
5. Refrigerant level low.
6. After 2 hours 30 minutes have
elapsed since error was
displayed, error detection
is performed again and error
is not displayed.
7. Compressor motor protector
operated.
8. Compressor faulty.
1. Generation condition.
Thirty minutes after
compressor 2 started,
discharge temperature 2
does not reach outdoor
temperature plus 10 C.
2. Corresponding operation.
1) After compressor error,
compressor recovery
operation performed.
However, for defrosting
control and oil recovery
operation, compressor
recovery operation is not
performed.
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
When 2 hours have elapsed
after error generation.
*Counting of 2-hour counter
begins from state in which
error occurred at one or
more of three compressors.
Error reset by turning power
off.
2. Compressor power relay 2
faulty.
0A
Compressor 3
error
1. Check for loose or dislodged discharge
temperature sensor THD3 sensor wiring
and check sensor resistance. If
abnormal, replace sensor.
2. Check compressor power relay 3. If
abnormal, replace power relay.
3. Check CN34 (compressor 3) 12V
voltage output on outdoor unit control
PC board. If abnormal, replace PC
board.
4. Check magnetic contactor 3. If
abnormal, replace contactor.
5. Check additional refrigerant amount
and recharge suitable refrigerant.
6. Temporary data transmission trouble
due to affect of noise, etc. Operation is
not affected.
7. Compressor overload operation.
Check "High-pressure error". Motor
protector reset at 61 C +/-9 C.
8. Check compressor. If faulty, replace
compressor.
1. Discharge temperature sensor
THD3 faulty.
3. Outdoor unit control PC board
faulty.
4. Magnetic contactor 3 faulty.
5. Refrigerant level low.
6. After 2 hours 30 minutes have
elapsed since error was
displayed, error detection
is performed again and error
is not displayed.
7. Compressor motor protector
operated.
8. Compressor faulty.
1. Generation condition.
Thirty minutes after
compressor 3 started,
discharge temperature 3
does not reach outdoor
temperature plus 10 C.
2. Corresponding operation.
1) After compressor error,
compressor recovery
operation performed.
However, for defrosting
control and oil recovery
operation, compressor
recovery operation is not
performed.
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
When 2 hours have elapsed
after error generation.
*Counting of 2-hour counter
begins from state in which
Error occurred at one or
more of three compressors.
Error reset by turning power
off.
2. Compressor power relay 3
faulty.
0B
– 98 –

Fujitsu AOY90 Specifications

General

Brand	Fujitsu
Model	AOY90
Category	Air Conditioner
Language	English