Troubleshooting
47
GA03108_002_C1 - 04/2018 - © Leybold
6 Troubleshooting
Malfunction
Likely cause
Remedy
Repair
Pump does not
start up.
Motor incorrectly connected.
Overtemperature switch or motor stator
defective.
Pressure switch is defective.
Lubricant is too thick.
Motor rotor defective.
Pump has seized: defective impellers, bearings
or toothed gears.
Connect motor correctly.
Leybold Service.
Replace the pressure switch.
Exchange the lubricant or warm up lubricant
and pump.
Leybold Service.
Leybold Service.
3.4
-
3.4
5.2
-
-
Pump gets too
hot.
Ambient temperature is too high or cooling air
flow is obstructed.
Pump is operating in the wrong pressure
range.
Pressure differences too high.
Gas temperature is too high.
Clearance between housing and rotors are too
small due to
- contamination
- distortion of the pump
Friction resistance is too high due to contami-
nated bearings and/or contaminated lubricant.
Lubricant level is too high.
Lubricant level is too low.
Wrong lubricant filled in.
Bearing is defective.
Fan improperly/not connected.
Fan defective.
Valve of the pressure balance line does not
open.
Install the pump at a suitable place or ensu-
re a sufficient flow of cooling air.
Check the pressure levels within the system.
Check the pressure levels within the system.
Check system.
Clean pumping chamber.
Affix and connect the pump free of tension.
Drain lubricant down to the correct level.
Top up lubricant to the correct level.
Drain lubricant, fill in correct lubricant.
Leybold Service.
Connect the fan correctly.
Leybold Service.
Clean the valve or have it repaired.
3.1
-
-
-
5.4
3.1/3.5
5.2
5.2
5.2
-
3.4
-
5.6
Power consumpti-
on of the motor is
too high.
Like „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
