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21 PB

TROUBLESHOOTING

Check Thermistors

1. Gain Acces to Main PCB (logic) board

2. Using a multi meter ohm across applicaple pins for the sensor you are checking.

3. All Sensors are 5k. Refer to thermistor chart on following for resistance and temperature deviation.

4. Replace sensor if open or if resistance values deviate by more than 10% of the listed values.

MODEL RT SENSOR IPT SENSOR (INDOOR COIL)

CCF05B10A 5kΩ /

CCF06AB0A 5kΩ /

CCF08B10A 5kΩ /

CCF10B10A 5kΩ 5kΩ

CCF12B10A 5kΩ 5kΩ

CCF14B10A 5kΩ 5kΩ

UCT08B10A 5kΩ 5kΩ

UCT10B10A 5kΩ 5kΩ

UCT10B30A 5kΩ 5kΩ

UCT12B30A 5kΩ 5kΩ

UCT14B30A 5kΩ 5kΩ

CCW06B10B 5kΩ /

CCW08B10B 5kΩ /

CCW10B10B 5kΩ 5kΩ

CCW12B10B 5kΩ 5kΩ

CCW15B10B 5kΩ 5kΩ

CCW18B30B 5kΩ 5kΩ

CCW24B30B 5kΩ 5kΩ

Friedrich CCW12B10B User Manual

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