Return Air Sensor Out of Range (RAT and RAT2)

RAT2 differs from RAT by 2°C for the stated samples, and the unit switches the active probe to RAT.

A Redundant Return Air Temperature Sensor (RAT2) is installed, configured, and it differs from RAT by 2°C for 10 consecutive one minute samples or for 25 of the last 30 samples.

Engine and Electric Operation: If RAT2 is selected as the active probe, switch active probe to RAT probe.

Auto reset when sensor is in range or, alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.