High Economizer Superheat

High superheat at the economizer; reduced cooling efficiency.

Possible causes

Obstructed Economizer Expansion Valve (EEV)
Low refrigerant level
Out-of-calibration economizer temperature sensor
Partially clogged filter drier

Recommended actions

Check refrigerant level in sight glass
Check economizer valve operation
Verify inlet/outlet temperature sensors
Clean or replace expansion valve if necessary

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