BUSCH DUPLEX - Failure Table and Measures

9 | Troubleshooting
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9.2 Failure table and measures
Problem Possible cause Remedy
The vacuum pump does
not start up.
The required voltage is
not pending at the mo-
tor.
Check the power supply.
Switch on the main
switch.
The motor is defective. Replace the motor.
The coupling (CPL,
fig. 17) is defective.
•
Replace the coupling
(CPL, fig. 17).
Motor protection switch
has triggered
•
Turn the motor protec-
tion switch (101Q1,
101Q2, 101Q3) to po-
sition “0” and then to
position “1”.
Fuse has triggered.
•
Check fuse (100F1).
Problem Possible cause Remedy
The required pressure
cannot be built up on the
intake connection.
The intake screen (IS,
fig. 17) is partially
clogged
•
Clean the intake screen
(IS, fig. 17).
Inner components are
worn or damaged
•
Have the vacuum pump
repaired
(Busch Service)
The oil level is too low
•
Top up oil.
Leak in piping system
Locate and repair leak-
age.
High noise development
during operation of the
vacuum pump
The bearings are defec-
tive.
•
Have the vacuum pump
repaired (Busch Ser-
vice).
The coupling (CPL,
fig. 17) is worn.
Replace the coupling
(CPL, fig. 17).
The sliders are stuck.
Have the vacuum pump
repaired
(Busch Service).
High heat development
during operation of the
vacuum pump
The cooling is insuffi-
cient.
•
Clean the vacuum
pump from dust and
contamination.
• Check the cooling water
inlet (version with oil-
water heat exchanger)
The ambiance tempera-
ture is too high.
•
Observe admissible am-
biance temperature.
The fan does not run or
turns in the wrong direc-
tion.
•
Check electrical connec-
tion.
The oil level is too low. Top up oil.
The exhaust filters (EF,
fig. 2 and 17) are partial-
ly clogged.
Replace the exhaust fil-
ters (EF, fig. 2 and 17).