Troubleshooting By Error Code; Common Check Procedures - Carrier 42QHP09E8S Service Manual

5. Troubleshooting by Error Code

5.1

Common Check Procedures

5.1.1 Temperature Sensor Check
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.
Temperature Sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(Tp) sensor.
Measure the resistance value of each winding by using the multi-meter.
5.1.2 Compressor checking
Measure the resistance value of each winding by using the tester.
Position
Blue - Red
Blue - Black
Red - Blue
Resistance Value
KTN110D42UFZ
1.82Ω(20°C/68°F)
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