Check Supply Air Sensor

Fault detected on the supply air temperature sensor (SAS). If the unit shut down, repair immediately; otherwise report and repair at end of trip.

Possible causes

Defective supply air sensor
Open or shorted sensor wiring
Corroded sensor connector
Sensor displaced from air discharge stream

Recommended actions

Measure SAS resistance against the temperature table
Inspect and clean sensor connector
Verify wiring continuity to the controller
Replace sensor if reading is out of range

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