Fujitsu ASYA07LBCM - Heat Sink Temperature Thermistor Error

Trouble shooting 15
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OKOK
OKOK
Heat Sink Temperature
Thermistor Error
Outdoor Unit Inverter PCB Circuit
Heat Sink Temperature Thermistor
When Heat Sink Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
1. Connector connection failure 2.Thermistor failure 3. Inverter 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 Inverter 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 Inverter PCB.
02-18
Refer to error code table.
30°C
Resistance Value (k )
20°C15°C10°C5°C0°C
Temperature
Resistance Value (k )
50°C
60°C 70°C 80°C 90°C 100°C
1.17 0.83 0.60 0.44 0.33
5.99.512.215.8 7.5
1.692.503.78
40°C
Temperature
BLACK
BLACK
BLACK BLACK BLACK BLACK BLACK BLACK
BLACK BLACK BLACK BLACK BLACK BLACK
BLA
CK
BLACK
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3 4
1 2 3
1 2 3
1 2
1 2
CN39
CN71 CN70 CN23
THERMISTOR (VALVE) THERMISTOR (PIPE) THERMISTOR (DISCHARGE PIPE) THERMISTOR (OUTDOOR TEMP.) THERMISTOR (HEATSINK)
2WV-A 3WV-A
2WV-B
3WV-B