| Fault symptom Possible cause Remedy
| Fault symptom Possible cause Remedy
| Fault symptom Possible cause Remedy
| |
A
| The compressor has poor capacity and/or does not produce full pressure.
| Dirty, worn or damaged valves.
| Inspect and clean all valves.
Replace defective parts.
| |
Piston rings have stuck in the ring grooves, or are damaged/broken.
| Disassemble the rings. Clean grooves and rings and replace defective parts. Reassemble, applying oil to the cylinder walls.
| |
Leaking safety valve.
| Replace safety valve.
| |
Defective cylinder head gasket.
| Replace gaskets.
| |
Clogged air filter.
| Clean filter.
| |
B
| LP safety valve blows.
| HP suction valve damaged or dirty.
| Inspect and clean valves and replace defective parts.
| |
Leaking seal in HP suction valve.
| Replace seal.
| |
LP safety valve defective or damaged.
| Replace safety valve.
| |
C
| HP safety valve blows.
| Stop valve in the air line is closed.
| Open the stop valve.
| |
Clogged non-return valve.
| Remove and clean non-return valve. Replace defective parts.
| |
HP safety valve defective or damage
| Replace safety valve.
| |
D
| Valves need overhauling too often.
| Overheating.
| Check cooling water circulation and temperature. Inspect and if necessary clean coolers.
| |
Polluted intake air.
| Inspect intake filter
| |
Poor lubricating oil.
| Change oil grade.
| |
Valve clamp bolts not tightened enough.
| Tighten the clamp bolts to the correct moment.
| |
E
| Overheating and/or abnormal noise in crankcase.
| Defective bearings.
| Inspect bearings and check clearances.
| |
Low oil level or condensation in oil.
| Drain and clean crankcase sump, fill with new oil.
| |
Jamming crankshaft bearing.
| Check bearing clearances. Replace defective parts.
| |
F
| Piston overheating and friction.
| Incorrect fitting of piston or crosshead bearing.
| Replace defective parts, check piston clearances, ring clearances and crosshead bearing.
| |
Cooling malfunction.
| Check cooling water circulation and temperature.
| |
G
| Increased oil consumption
| Worn piston rings.
| Replace piston rings.
| |
Leakage.
| Check the exterior of the compressor.
| |
| H
| Oil emission from crankcase ventilation.
| Defective or worn piston rings.
| Remove and check piston and if necessary replace defective piston rings.
|
| Defective ventilating valve.
| Replace valve.
|
| I
| Ruptured bursting disc.
| Cooling water pressure too high.
| Check that pressure is within the specified limits.
|
| Cooling water temperature too high.
| Check that temperature is within the specified limits.
|
| Pressure pulses in cooling water system.
| Determine what is causing pulses and eliminate.
|
| J
| Worn rubber lamina in the coupling between compressor and motor.
| Poor alignment of compressor and motor shafts.
| Correct alignment of coupling.
|
| | | | | | | | |