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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. manual-no.: 999128 / 29/04/2014
Never operate a defective pump!
Read and obey the instructions for use!
Fault
Possible cause
Remedy
❑
Pump does not start or
stops immediately.
➨
Mains not plugged in, electri-
cal supply failure?
✔
Check power supply and
fuse in the building instal-
lation.
➨
Pressure in outlet pipeline too
high?
✔
Remove blockade in line,
open valve.
➨
Motor overloaded?
✔
Allow the motor to cool down,
identify cause of failure and
eliminate. Reset the motor
protection and switch on the
pump, see section above.
❑
Pump does not achieve
its ultimate vacuum or
usual pumping speed.
➨
Centring ring at small flange
connection not correctly posi-
tioned or leak in the pipeline
or vacuum system?
✔
Check pump directly - con-
nect vacuum gauge directly
at pump inlet - then check
connection, pipeline and
vacuum system if necessary.
➨
Long, narrow line?
✔
Use lines with larger di-
ameter, length as short as
possible.
➨
Pump has been exposed to
condensate?
✔
Allow pump to run for some
minutes with atmospheric
pressure at the inlet.
➨
Deposits have been formed
inside the pump?
✔
Clean and inspect the pump
heads.
➨
Diaphragms or valves dam-
aged?
✔
Replace diaphragms and/or
valves.
➨
Outgassing substances or
vapour generated in the
process?
✔
Check process parameters.
❑
Pump too noisy.
Attention: Switch off
pump immediately and
inspect!
➨
Loud exhaust noise?
✔
Connect hose or silencer to
pump outlet.
➨
Diaphragm crack or dia-
phragm clamping disc loose?
✔
Perform maintenance.
➨
Motor bearing defective?
✔
Contact local distributor.
➨
Deposits have been formed
inside the pump?
✔
Clean and inspect pump
heads.
➨
Diaphragms or valves defec-
tive?
✔
Replace diaphragms and/or
valves.
➨
Other than above mentioned
causes?
✔
Contact local distributor.
❑
Pump seized.
✔
Contact local distributor.
Troubleshooting
