9 | Troubleshooting
0870S03226_VRD 2072-3108_-0000_IM_en
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9 Troubleshooting
Electric shock danger.
Live wires.
• Electrical installation work must only be performed by qualified specialists.
Hazard from running vacuum pump!
There is a severe threat for life and limb depending on the repair and maintenance
work to be carried out if the vacuum pump is running.
Only carry out any repair or maintenance work if:
• the vacuum pump is not running
• the vacuum pump is disconnected from the electrical supply and secured against unin-
tentional start-up
• vacuum system and pipes are not under pressure,
• hot surfaces are cooled down,
• Cooling water supply is interrupted (only version with oil/water heat exchanger).
Disconnect the vacuum system from the process and make sure that there is ambient
pressure in the vacuum system! Procedure: Close inlet side shut-off devices (not included
in the scope of delivery) and open vent valves slowly (not included in the scope of deliv-
ery).
9.1 General faults
The figure shows the components that are relevant for troubleshooting.
Fig. 17 : Vacuum pump with components relevant for troubleshooting
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