Replace screw air compressor lubricating oil by stopping the machine, draining old oil, cleaning pipelines, adding new oil, and replacing the oil filter. Check oil level after starting.
[pdf] Solutions: Inspect the system for leaks, replace clogged filters, and check for worn parts like seals or rotors. Possible Causes: Loose components, bearing wear, or improper alignment. Solutions: Tighten loose components, inspect bearings, and ensure proper alignment of moving parts.
[pdf] Checkout Current Transformers (CTs) and check resistance across each one while it is disconnected. All resistances should be within 10% of one another. Also do a diode test on the CT inputs on each compressor module. (The diode test is described in RTAA-SVB10B-EN.)
[pdf] 
