Fujitsu Inverter Halcyon ASU12RMLQ, Service Instruction

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02-01
Manual auto switch error
Power supply frequency detection error
VDD permanence stop protection
(Electric air clean)
Reverse-VDD permanence stop protection
(Electric air clean power supply circuit abnormal)
The OPERATION, TIMER, AIR CLEAN and COIL DRY lamps operate
as follows according to the error contents.
Error display
OPERATION
TIMER COIL DRY
(RED) (GREEN) (GREEN) (ORANGE)
Error contents
:
0.5s ON / 0.5s OFF (Flash)
:
OFF
2-way valve temperature thermistor error
Indoor heat exchanger temperature
thermistor (middle) error
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
1
3
11
19
4
12
13
21
22
25
26
29
30
15
31
32
16
9
23
14
17
18
24
10
5
7
8
For ASU9 - 18RMLQ
Discharge temperature error
Indoor fan motor abnormal
Outdoor unit fan motor error
Pressure switch error
CT error
IPM error
Compressor rotor location cannot detect
(permanent stop)
Exessive high pressure protection on cooling
8 times
Communication error
(indoor unit remote control)
2 times
3-way valve temperature thermistor error
2 times
3 times
2 times
3 times
4 times
5 times
2 times
2 times
3 times
3 times 2 times
3 times
3 times
3 times 4 times
3 times
7 times
3 times 8 times
4 times
2 times
4 times 4 times
4 times
7 times
4 times
8 times
5 times 2 times
5 times
3 times
5 times 5 times
5 times
6 times
5 times 7 times
5 times
6 times
8 times
7 times 2 times
7 times
3 times
7 times 5 times
2 times
3 times
8 times
3 times 2 times
3 times 3 times
Connected indoor unit error
Main CPU-Sub CPU communication error
AIR CLEAN
or QUIET
Indoor EEPROM abnormal (Model No.)
Active filter module (AFM) error
Continuous
blink Continuous
blink Continuous
blink Continuous
blink
2. TROUBLESHOOTING
2-1 ERROR DISPLAY
2-1-1 INDOOR UNIT DISPLAY