Return Air Temperature Sensor Fault (DSR)

Direct Smart Reefer detected a fault in the return air temperature sensor.

Possible causes

Damaged sensor wiring
Open or short circuit in sensor
Failed return air sensor
Loose connector

Recommended actions

Inspect sensor wiring and connectors
Measure sensor resistance
Replace sensor if out of range
Manually monitor box temperature

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Other Thermo King codes

00No Alarms Exist 02Check Evaporator Coil Sensor (Zone)03Check (Control) Return Air Sensor (Zone)04Check (Control) Discharge Air Sensor (Zone)05Check Ambient Temp Sensor 06Check Coolant Temp Sensor

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