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P00153@x4-7700low

Check Return Air Sensor

electrical

Description

Check Return Air Sensor means the RAT is not within -53 to +158°F (-47 to +70°C), and Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.

Activation Conditions

Return Air Temperature Sensor (RAT) is not within the range of -53 to +158°F (-47 to +70°C).

Unit Behavior

Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.

Reset Conditions

Auto reset if Pretrip is started again, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.

Corrective Actions

Check Sensor Operation: Refer to procedure for alarm 00122 Check Return Air Sensor (RAT). Alarm condition must be corrected and the alarm cleared to continue.