12 | Troubleshooting
34 | 40 Instruction Manual MINK MV 0500-0600 B_EN_en
Problem Possible Cause Remedy
The machine does not reach
the usual pressure on the suc-
tion connection.
The inlet screen (IS) is partially
clogged.
● Clean the inlet screen (IS).
The vacuum relief valve (VRE) is
misadjusted or defective.
● Replace the vacuum relief
valve (VRE)
The inlet filter cartridge (op-
tional) is partially clogged.
● Replace the inlet filter car-
tridge.
Internal parts are worn or
damaged.
● Repair the machine (contact
Busch).
The machine runs very noisily. Worn coupling (CPL). ● Replace the coupling (CPL).
Oil level too low. ● Top up oil.
Defective bearings. ● Repair the machine (contact
Busch).
The machine runs too hot. Insufficient cooling. ● Remove dust and dirt from
the machine .
The cooling fan’s rotation di-
rection is incorrect.
● Check the rotation direction
of the cooling fan, see Ma-
chine delivered with a Vari-
able Speed Drive.
Ambient temperature too high. ● Observe the permitted am-
bient temperature, see Tech-
nical Data [➔35].
Temperature of the process
gases at the inlet too high.
● Observe the permitted gas
inlet temperature, see Tech-
nical Data [➔35].
Oil level too low. ● Top up oil.
For resolution of problems not listed in the troubleshooting table, please contact your Busch repre-
sentative.
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