GA VSD+

Walk the system with a sonic leak detector at every joint, fitting, and drain. Prioritize leaks by flow rate. A 3 mm orifice leak at 7 bar wastes roughly 60 SCFM continuously.

Overheating almost always means a blocked intercooler or aftercooler. Clean both coolers and verify the thermostatic bypass valve opens at the correct temperature.

Excessive vibration is most often loose foundation bolts or collapsed anti-vibration mounts. Torque the foundation bolts first, then check the mounts before suspecting the airend.

Low pressure output is most often worn inlet valve plates allowing blow-by. Check separator delta-P first, then do a compression efficiency test.

Oil in discharge air means the separator element is saturated or the scavenge orifice is blocked. Replace the separator element and clear the scavenge line.

Short cycling means demand is catching up with the receiver too fast. Find and fix system leaks first. If leaks are minimal, the receiver may be undersized for the demand pattern.

Grinding from the airend signals bearing wear. Check mounting bolt torque first (easy fix), then run a bearing inspection if noise persists.

Read the Elektronikon fault code first. Most won't-start faults are a pressure switch error, VSD input fault, or supply voltage issue. Fault code lookup takes 2 minutes and narrows the field immediately.