Outdoor Discharge Pipe Temperature Thermistor Error - Fujitsu ASYA07LBCM Service Manual

Trouble shooting 7
OUTDOOR UNIT Error Method:
INDOOR UNIT
Outdoor Discharge Pipe Temperature
Thermistor Error
Detective Actuators:
Outdoor Unit Inverter PCB Circuit
Discharge Pipe 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 Discharge Pipe Temperature Thermistor open or short-circuit
is detected at power ON or while running the compressor.
2.Thermistor failure
0°C 5°C 10°C 15°C
169 130 101 79.1
70°C 80°C 90°C 100°C
8.69 6.27 4.60 3.43
3. Inverter PCB failure
20°C 30°C 40°C
62.5 40.0 26.3
120°C
2.00
02-10
50°C 60°C
12.3
17.8