Fujitsu AOY90 User Manual

ERROR
CONTENTS
ERROR CAUSE
REMEDY
ERROR
CODE
00 No errors
02
1. Generation condition
Error in model information
memorized in EEPROM when
power turned on.
2. Corresponding operation.
1) Relevant indoor unit stopped
(not started).
2) Error display to indoor 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 indoor unit control PC
board not performed normally.
2. Corresponding operation.
1) Relevant indoor unit stopped
(not started).
2) Error display to indoor unit
LED and error output to
communication bus line.
3. Reset condition
Normal microcomputers
communication restored.
Replace indoor unit control PC board.
1. When power turned off, and then
turned on again:
1) If error not generated again, PC
board is normal. Therefore, remove
noise sources near indoor unit.
2) If error generated again, perform the
following, in addition to removing noise
sources.
2. Replace indoor unit control PC board.
Model information not
memorized or erased for some
reason.
1. Effect of extraneous noise.
2. Indoor unit control PC board
faulty.
Model data error
03 Microcomputer
error
1. Generation condition
Indoor unit control PC board
detected frequency outside
operating.
2. Corresponding operation.
1) Relevant indoor unit
stopped (not started).
2) Error display to indoor unit
LED and error output to
communication bus line
3. Reset operation.
Indoor unit control PC board
detects rated frequency.
Check power line frequency and supply
rated frequency.
Power line frequency is below
45Hz or above 65Hz.
04 Power line
frequency
abnormal
1. Generation condition
After indoor unit started,
EEPROM cannot be
accessed because of
disturbance or element error.
2. Corresponding operation
Error display to indoor unit
LED.
3. Reset operation
Normal access to EEPROM
restored.
1. Remove noise sources near indoor
unit.
2. Replace indoor unit control PC board.
EEPROM cannot be accessed
because of disturbance, element
error, etc.
06
EEPROM
access error
INDOOR UNIT TROUBLESHOOTING
8-4 ERROR CODE & TROUBLESHOOTING
– 91 –

Fujitsu AOY90 Specifications

General

Brand	Fujitsu
Model	AOY90
Category	Air Conditioner
Language	English