LEYBOLD 111065, Operating Instructions Manual

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8 Troubleshooting
Malfunction Possible cause Corrective Action
Pump does not start up Wrong or loose connection
at motor terminal Check the connections
Pump is blocked Leybold Service
Belt is broken Leybold Service
Motor is defective Leybold Service
Wrong supply voltage Check the mains power or inverter
Motor protective switch
triggers Pump is blocked Leybold Service
Motor is defective Leybold Service
Wrong setting of protective
switch Set according to value in technical
data table
Wrong direction of rotation Check and change the direction of
rotation if applicable
Wrong supply voltage Check the mains power
Exhaust line is clogged Clean the exhaust line
Pump does not reach
vacuum
performance Inlet filter is clogged Clean the inlet filter (if in use)
Gas leak at the pump inlet Eliminate the leak
Wrong rotational speed Check the mains frequency or
inverter
Wrong setting of gas ballast Correct if applicable
Inlet seal purge is defective Leybold Service
Pump is noisy or has high
vibration level Pump is clogged with
process deposition Follow the cleaning instructions
Belt is worn/defective Exchange the belt
Leybold Service
Bearing is defective Leybold Service
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300766038_002 - © Leybold
Troubleshooting