P00153@x4-7500low
Check Return Air Sensor
electrical
Description
Return Air Temperature Sensor is not within -53 to +158°F (-47 to +70°C), and Pretrip fails and displays “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.