12 | Troubleshooting
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The machine runs too hot.
(Pump surface rise up to
about 100 °C (212 °F)).
Continuous operation at too
high suction pressure.
• Reduce the suction pres-
sure.
Insufficient cooling. • Remove dust and dirt
from the machine.
Ambient temperature too
high.
• Observe the permitted
ambient temperature.
Oil level too low. • Top up oil.
The oil is not circulating. • Conduct an overhaul
(contact Busch).
Oil has deteriorated. • Perform a non load oper-
ation with vacuum valve
closed and gas ballast
valve open or replace the
oil.
The machine fumes or ex-
pels oil droplets through the
gas discharge.
Oil level too high. • Drain the oil until it gets
the specified level.
Continuous operation is per-
formed at high suction pres-
sure.
• Install an oil mist separ-
ator.
Oil mist separator (optional)
is clogged.
• Replace the filter element.
Oil mist separator (optional)
is not assembled properly.
• Reassemble properly the
oil mist separator.
The oil is emulsified. The machine sucked in li-
quids or significant amounts
of vapour.
• Perform a non load oper-
ation with vacuum valve
closed and gas ballast
valve open or replace the
oil.
• Modify the operational
mode, )see Conveying
Condensable Vapours
[}14]).
For the solution of problems not mentioned in the troubleshooting chart contact your
Busch representative.
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