1
Low oil / coolant
CheckSight glass or dipstick.
FixTop up with OEM-spec oil.
2
Dirty cooler fins
CheckVisual.
FixBlow out fins, clean condenser.
3
Fan failure / wrong rotation
CheckVerify rotation, check fan motor.
FixCorrect rotation (swap 2 phases), replace fan motor.
4
Thermostatic valve stuck (screw)
CheckMeasure inlet/outlet temps across oil cooler.
FixReplace TV element.
5
High ambient / poor ventilation
CheckRoom temp + airflow.
FixDucting, louvres, dedicated room fan.
6
Failing oil filter
CheckDifferential pressure indicator.
FixReplace filter element.
Safety
Lockout/tagout before opening enclosures. Verify zero energy. Bleed system pressure before opening any pneumatic connection.