Fujitsu AU A36LCLU Series Service Instruction page 43

2-1-2 OUTDOOR UNIT DISPLAY
Please refer the blinking pattern as follows.
Outdoor Unit : AO*D36 - 54LATT
1. MAIN PCB
The Error LED operate as follows according to the error contents.
Error contents
Serial error (Serial forward transfer error)
Outdoor discharge pipe temperature thermistor error
Outdoor heat exchanger temperature thermistor (Out) error
Outdoor temperature thermistor error
Outdoor heat exchanger temperature thermistor (Middle) error
Discharge temperature error
Compressor thermistor error
Heat sink thermistor (INV) error
Pressure SW (Sensor) error
Compressor temperature error
Connected indoor unit error
Over current protection
Compressor location detection error
Compressor start-up error
Outdoor unit fan error
Heat sink thermistor (PFC) error
INV error
PFC PCB error
Low pressure error
Indoor error
Error LED
1 times flash
2 times flash
3 times flash
4 times flash
5 times flash
6 times flash
7 times flash
8 times flash
9 times flash
10 times flash
11 times flash
12 times flash
13 times flash
14 times flash
15 times flash
16 times flash
17 times flash
18 times flash
19 times flash
20 times flash
21 times flash
02-02
Trouble
shooting
2
7
8
9
12
22
11
10
24
25
19
15
33
17
18
13
20
27
26
28,29,30