Table Of Thermistor Characteristics - Technibel CAFP 124 R Technical Data & Service Manual

Check Pin
Short-circuit the cooling check pin (or heating check pin) on the outdoor unit control PCB to perform the control
described below.
1. Thermistor checks
The checks listed below are performed for 1 second each, in order from the top down. The results are dis-
played by LED 1 and 2.
Thermistor
Discharge temp. (TD)
Outdoor air temp. (TO)
Heat exchanger temp. (C1)
Heat exchanger temp. (C2)
Intake temp. (TS)
↓
2. 4-way valve turns ON for 1 second.
↓
3. Forced cooling (or heating) operation

4-5. Table of Thermistor Characteristics

(1) Outdoor Air Temp. (TO), Intake Temp. (TS),
4
Heat Exchanger Temp. (C1) Sensor, Heat
Exchanger Temp. (C2) Sensor
Check results
Normal Abnormal
LED 1 lit
LED 2 lit
LED 1 lit
LED 1 and 2 OFF
LED 1 lit
Temperature (°C)
(2) Discharge Temp. (TD) Sensors
4 - 14
Temperature (°C)