Alarm conditions:
24A - Open circuit in evaporator air temperature sensor (B11) circuit,
25A - Short circuit in evaporator air temperature sensor (B11) circuit,
26A - Open circuit in evaporator air temperature sensor (B12) circuit,
27A - Short circuit in evaporator air temperature sensor (B12) circuit.
Possible causes:
- Sensor failure,
- Damaged wiring,
- Main controller failure.
Troubleshooting
Pic 1. Temperature sensor characteristics
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