Air Temperature Sensor Failure (Sair)

The return air sensor is out of range or disconnected.

Possible causes

Disconnected sensor
Cut or shorted cable
Defective sensor

Recommended actions

Measure NTC resistance of the sensor
Check connector on the controller
Replace PT1000/NTC sensor

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Other Danfoss codes

E2Evaporator Sensor Failure (S3)E6Data Communication Failure A1High Temperature Alarm A2Low Temperature Alarm

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