Troubleshooting
69
130001398_002_C0 - 09/2016 - © Leybold
6 Troubleshooting
Malfunction
Possible cause
Remedy
Repair
Pump does not
start up.
Motor/frequency converter incorrectly
connected.
Overtemperature switch or motor stator
defective.
Lubricant is too thick.
Pump has seized: defective impellers, bearings
or toothed gears.
Connect motor/frequency converter
correctly.
Leybold Service.
Exchange the lubricant or warm up
lubricant and pump.
Leybold Service
3.4
-
5.2
-
Pump gets too
hot.
Cooling water supply is not sufficient.
Cooling water lines are clogged.
Cooling water temperature is too high.
Ambient temperature is too high.
Pressure differences too high.
Gas temperature is too high.
Clearances between housing and rotors are too
small due to
- contamination
- distortion of the pump.
Friction resistance is too high due to contaminated
bearings and/or contaminated lubricant.
Wrong lubricant was filled in.
Defective bearings.
Ensure sufficient cooling water supply.
Ensure sufficient cooling water supply
acc. to Technical Data
Install the pump at a suitable place
Check pressure conditions in the system
Check the system
Clean pump chamber
Affix and connect the pump free of tension
Drain lubricant, fill in correct lubricant. When
changing between mineral oil, ester oil or
PFPE the pump will have to be cleaned first
by the Leybold service.
Leybold Service.
3.3
3.1
-
-
5.4
3.1/3.5
5.2
Power consumpti-
on of the motor is
too high.
Like malfunction “Pump gets too hot”.
Incorrect mains voltage for the motor.
Like malfunction “Pump gets too hot”.
Connect the motor to the correct mains
voltage.
-
1.3/3.4
Pump is too loud.
Motor stator defective.
Oil level is too low
Distances between housing and rotors is too
small due to
- contamination
- distortion of the pump
Bearing or gear damage.
Pistons make contact with the housing.
Rotor is running untrue.
Leybold Service.
Top up oil
Clean pump chamber
Fix and connect pump free of tension
Leybold Service, shutdown pump immediately.
Leybold Service, shutdown pump immediately.
Leybold Service, shutdown pump immediately.
-
3.1.3
5.4
3.1/3.5
-
-
-
