Fujitsu AB*14LBAJ Service Instruction page 43

For AU*F09 - 18LAL
AB*F14 - 24LAT
The OPERATION, TIMER and FILTER lamps operate as follows according to the error contents.
Error contents
Communication error
(Serial reverse transfer error)
Outdoor communication signal error
(Forward transfer signal error)
Communication error
(Main PCB Display PCB)
Communication error
(Main PCB Display PCB)
Communication error
(indoor unit remote control)
Room temperature thermistor error
Indoor heat exchanger temperature
thermistor (middle) error
Indoor heat exchanger temperature
thermistor (inlet) error
Outdoor discharge pipe temperature
thermistor error
Outdoor heat exchanger temperature
thermistor error
Outdoor temperature thermistor error
Heat sink temperature thermistor error
Compressor temperature
2-way valve temperature
3-way valve temperature
Forced auto switch error
IPM error
CT error
Compressor rotor location cannot detect
(permanent stop)
Outdoor unit fan motor error
Connected indoor unit error
Main CPU-Sub CPU communication error
Indoor fan motor abnormal
Discharge temperature error
4-way valve error
Pressure switch error
:
0.5s ON / 0.5s OFF (Flash)
thermistor error
thermistor error
thermistor error
:
OFF
Error display
OPERATION TIMER
(GREEN) (ORANGE)
2 times
3 times
4 times
5 times
6 times
7 times
8 times
2 times
2 times
2 times
3 times
2 times
4 times
2 times
3 times
3 times 3 times
3 times 4 times
3 times
7 times
3 times
8 times
3 times
3 times
4 times
2 times
5 times 2 times
5 times 3 times
5 times 5 times
5 times 6 times
5 times 7 times
5 times 8 times
2 times
6 times
3 times
7 times 2 times
7 times 4 times
7 times 5 times
02-05
Trouble
shooting
FILTER
(RED)
2
11
27
28
1
3
4
8
5
7
19
12
2 times
21
3 times 22
25
14
15
17
18
23
24
10
30
32
13