Fujitsu AOY90 User Manual

ERROR
CONTENTS
ERROR CAUSE
REMEDY
ERROR
CODE
00 No errors
02
1. Generation condition.
When power turned on, there
was an error in model
information memorized in
EEPROM.
2. Corresponding operation.
1) All compressors stopped
(not started).
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
Model information
memorized in EEPROM
restored to normal.
1. Generation condition.
Communication between two
microcomputers on outdoor
unit control PC board not
performed normally.
1) All compressors stopped
(not started).
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
Normal microcomputers
communication restored.
Replace outdoor unit control PC board.
1. When power turned off, then turned
back on:
1) If error not generated again, PC board
is normal. Therefore, remove noise
sources near outdoor unit.
2) If error generated again, perform
following, in addition to removing noise
sources.
2. Replace outdoor unit control PC board.
Model information not
memorized, or erased for some
reason.
1. Effect of extraneous noise.
2. Outdoor unit control PC board
faulty.
Model
data error
03
Communication
error
1. Generation condition.
Outdoor unit control PC
board detected frequency
outside of rating.
2. Corresponding operation.
1) All compressors stopped
(not started).
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
Outdoor unit control PC board
detects rated frequency.
Check power line frequency and supply
correct frequency.
04
Power frequency
faulty
1. Check power supply wiring.
2. Check power supply wiring. If there are
no mistakes, replace outdoor unit
control PC board.
1. Reverse phase wiring.
2. Reverse phase prevention
circuit faulty.
05
Reverse phase
blocker error
Power line frequency below
45Hz or above 65Hz.
1. Generation condition.
Reverse phase prevention
circuit detected reverse
phase input or when the
normal input was not detected.
2. Corresponding operation.
1) All compressors stopped.
2) Error display to outdoor unit
LED and error output to
communication bus line.
3. Reset condition.
Reverse phase prevention
circuit no longer detects
reverse phase input.
OUTDOOR UNIT TROUBLESHOOTING
– 96 –

Fujitsu AOY90 Specifications

General

Brand	Fujitsu
Model	AOY90
Category	Air Conditioner
Language	English