PREBENA
Wilfried Bornemann GmbH & Co. KG
BEFESTIGUNGSTECHNIK
– FASTENING TECHNOLOGY
18
9
Troubleshooting and fault correction
Table 3
Troubleshooting,
Malfunctions
Probable cause
Solution
Inadequate compressor
delivery performance
A dirty air filter
Clean or replace filter element
Bad connection or damaged air
lines
Locate air leakage, tighten the
screws, replace air line
Belt slippage due to low voltage
or dirt
Tighten the belt and remove dirt
Air leaks from the pressure
vessel into the air line:
"Hiss" in the compressed air
supply line when switching
off the compressor
Check valve wear or foreign
body between the valve and
seat
Loosen hex bolt, clean seat and
valve
Compressor switches off
during operation,
overheating of the motor
Low oil level in the crankcase
of the compressor
Check the oil quality and status,
replenish as required
Continuous operation of the
compressor with a relative duty
cycle [ED] of over 60%, max.
pressure and air consumption.
Motor protection is activated
Reduce compressor load by
reducing air consumption, restart
motor
Compressor stops during
operation
Power supply circuit failure
Check the power supply circuit
Compressor vibrates during
operation, uneven hum of
the motor, motor hums after
rebooting, the compressor
will not start.
No voltage in one phase of the
power supply circuit
Check the power supply circuit
Residual oil in the
compressed air and the
pressure vessel
Oil level in crankcase too high
Restore normal oil level
NOT E: If malfunctions are not listed here, contact the manufacturer, authorised on-site
representative or retailer.
Summary of Contents for MOUNTAINE 950
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