Troubleshooting – VACUUBRAND MZ 2C EX +IK+EK User Manual
Page 31
page 31 of 75
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