Fault
Possible cause
Remedy
Air leaks from the user's pres‐
sure switch while the machine
is running.
Defective switch diaphragm.
Call KAESER SERVICE.
The venting valve is not clos‐
ing.
Maintain or replace the unload‐
ing valve.
Whistling sound from the cylin‐
der head.
Cylinder head fixing screws
loose.
Gasket defective.
Tighten the cylinder head fixing
screws.
Replace gasket.
The pressure relief valve blows
off before the cut-out pressure
is reached.
User's pressure switch incor‐
rectly set.
Check pressure switch setting.
Valve spring defective.
Call KAESER SERVICE.
Dirt or foreign bodies on the
valve seat.
Let the pressure relief valve
blow off briefly.
Pressure relief valve on the air
cooler blows off prematurely.
Cooler clogged. Cooler pipe
blocked with scale.
Clean the cooler.
Machine uses too much oil.
Viscosity too low.
Fill with oil specified in the serv‐
ice manual.
Crankcase vent defective.
Maintain or replace crancase
vent.
Piston rings worn or broken.
Call KAESER SERVICE.
Piston rings worn or damaged
after a short operational period.
Dirty oil.
Fit finer air inlet filter.
1)
depending on machine
Tab. 34 Faults and remedies
9
Fault Recognition and Rectification
9.2
Faults
64
Assembly and operating manual 1-stage piston compressor
EPC-G
No.: 9_5752 24 E
