Check Economizer Pressure Sensor (Scroll only)

Anomaly in the signal or reading from the economizer pressure sensor (Scroll).

Possible causes

Defective economizer pressure sensor
Open circuit or short in sensor wiring
Economizer expansion valve failure
Restriction in the economizer line

Recommended actions

Check economizer sensor connection and voltage
Measure actual pressure to compare with electronic reading
Verify economizer solenoid operation
Replace sensor if reading is static

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