11 | Troubleshooting
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The machine does not reach
the usual pressure on the
suction connection.
Suction or discharge lines
too long or section diameter
too small.
• Use larger diameter or
shorter lines.
• Seek advice from your
local Busch representa-
tive.
The machine runs in the
wrong direction.
• Check the direction of ro-
tation, see Wiring Dia-
gram Three-Phase Motor
Different density of con-
veyed medium
• Take conversion of pres-
sure value into account.
Contact Busch if neces-
sary.
Change in blade profile due
soiling.
• Check the impeller, clean
or replace if necessary.
In case an inlet screen is in-
stalled:
The inlet screen is partially
clogged.
• Clean the inlet screen.
In case a vacuum relief valve
is installed:
The vacuum relief valve is
misadjusted or defective.
• Replace the vacuum relief
valve.
In case an inlet filter valve is
installed:
The inlet filter cartridge is
partially clogged.
• Replace the inlet filter
cartridge.
Leak in the system. • Repair leak.
Internal parts are worn or
damaged.
• Repair the machine (con-
tact Busch).
The machine runs too hot. Insufficient cooling. • Remove dust and dirt
from the machine.
Ambient temperature too
high.
• Observe the permitted
ambient temperature.
Compressor leaky. Seals on silencer defective. • Check silencer seals and
replace if necessary
Seals in motor area defect-
ive.
• Check motor seals and re-
place if necessary
For the solution of problems not mentioned in the troubleshooting chart contact your
Busch representative.
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