2-Way Valve Temperature Thermistor Error - Fujitsu ASYA07LBCM Service Manual

Trouble shooting 17
OUTDOOR UNIT Error Method:
2-way valve Temperature
Thermistor Error
Detective Actuators:
Outdoor Unit Inverter PCB Circuit
2-way valve Temperature Thermistor
Forecast of Cause :
1. Connector connection 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.
OK OK
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 2 :
Thermistor Characteristics (Approx. value)
Temperature
Resistance Value (k )
Temperature
Resistance Value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK OK
Check Point 3 : 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.
Indicate or Display:
Refer to error code table.
Detective details:
When 2-way valve Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
2.Thermistor failure
-10°C -5°C 0°C
312 233 176
40°C
50°C 60°C
25.6 17.1 11.6
3. Inverter PCB failure
5°C 10°C 15°C
134 103 80.3
70°C 80°C
8.12 5.78
02-20
20°C 30°C
62.9 39.6