Fujitsu Inverter Halcyon ASU12RMLQ, Service Instruction

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02-02
The OPERATION, TIMER and FILTER lamps operate as follows according to the error contents.
Error display
OPERATION TIMER FILTER
(GREEN) (ORANGE) (RED)
Error contents
:
0.5s ON / 0.5s OFF (Flash)
:
OFF
2-way valve temperature thermistor error
Indoor heat exchanger temperature
thermistor (middle) error
Water drain abnormal
Outdoor heat exchanger temperature
thermistor error
Outdoor discharge pipe temperature
thermistor error
Compressor temperature thermistor error
Outdoor temperature thermistor error
Heat sink temperature thermistor error
Communication error
(Serial reverse transfer error)
Outdoor communication signal error
(Forward transfer signal error)
Trouble
shooting
Room temperature thermistor error
2
3
1
11
27
28
19
4
12
13
21
22
25
15
23
14
17
18
24
10
31
32
33
5
7
8
For AUU9 - 18RML
Discharge temperature error
Indoor fan motor abnormal
Outdoor unit fan motor error
Pressure switch error
CT error
Communication error
(Main PCB Display PCB)
Communication error
(Main PCB Display PCB)
IPM error
Compressor rotor location cannot detect
(permanent stop)
Compressor temperature error
Manual auto switch error
Exessive high pressure protection on cooling
8 times
Communication error
(indoor unit remote control)
6 times
2 times
2 times
3 times
2 times
6 times
2 times
2 times
3 times
3 times 3 times
4 times 3 times
7 times
3 times
2 times
4 times
2 times 5 times
3 times 5 times
5 times 5 times
6 times 5 times
7 times 5 times
8 times 5 times
2 times 7 times
3 times 7 times
5 times 7 times
6 times 7 times
6 times
8 times
3 times
2 times
3 times
3-way valve temperature thermistor error
3 times 3 times
7 times
2 times
3 times
2 times
3 times
4 times
5 times
Connected indoor unit error
Main CPU-Sub CPU communication error
6
7 times
4 times
4 way valve error operation
35
Indoor EEPROM abnormal error
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