Fujitsu ASU 9RLF1

Trouble shooting 11
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
62.5100.9129.8168.6221.1292.9Resistance Value (k )
Temperature(°F)
OKOK
OKOK
40.0
2.03.44.66.38.7Resistance Value (k )
Temperature(°F)
Discharge thermistor error
Outdoor unit Main PCB
Discharge pipe temperature thermistor
When Discharge pipe temperature thermistor open or short-circuit
is detected at power ON or while running the compressor.
1. Connector connection failure 2.Thermistor failure 3. Main PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Main PCB.
02-14
THERMISTOR
(PIPE)
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
194°F176°F158°F
26.3
104°F
17.8
122°F
12.3
140°F
86°F
212°F
2.6
230°F
41°F32°F23°F14°F
68°F50°F
248°F
1
2
3
4
1
2
3
4
1
2
3
1
2
3
CN61
CN62
AOU9RLFW1
THERMISTOR
(PIPE)
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
BROWN
BROWN
BLACK
BLACK
1
2
3
4
1
2
3
4
1
2
3
1
2
3
CN71
CN70
AOU12RLFW1
Refer to error code table.