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DT 4.10, DT 4.16, DT 4.25, DT 4.40, DX 4.10, DX 4.16, DX 4.25, DX 4.40
7
TROUBLESHOOTING / TROUBLESHOOTING
DANGER
Danger to life from electric shock - Personnel qualification
DANGER
Danger to life due to defective, dismantled and manipulated protective devices
DANGER
Danger to life due to unexpected start-up
WARNING
Risk of injury due to slipping, stumbling
NOTE
For a description of the safety instructions, see chapter 2.9
NOTE
Visual inspection: The pump is free of foreign objects. After initial inspection, the pump is in a damage-free
condition. This also includes checking the electrical and pneumatic components and connections.
• Expel unauthorised persons from the pump
If troubleshooting is carried out immediately after operation, ensure that there is sufficient cooling time.
Pump troubleshooting is only allowed under the following conditions:
Shutdown
For troubleshooting, the pump must be shut down and secured against being switched on again. In addition, a
warning sign must be attached to the mains disconnection device.
All existing electrical equipment must be disconnected individually.
If safety devices have to be dismantled or modified for troubleshooting, they must be reattached, adjusted and tested
after completion of the maintenance and servicing activities and before starting the pump.
After that, a verifiably qualified electrician may carry out activities on the pump.
After completion of the activities, the pump may be put back into operation after a visual inspection.
When troubleshooting, check the pump in particular for defects.
• Damage, especially to:
• Ventilation grilles
• Screw fittings
• Media lines
• Electrical lines
• Leaks
• Loose objects
• Loose screw connections or fastenings
• Contact protection on live parts
If defects and hazards become visible during the inspection, the pump must be shut down immediately. The pump
may only be put into operation if it is in perfect condition.
After completion of the activities, follow the procedure according to the point: "Recommissioning".
The chapter 8.1 must be followed.
7.1
FAULT TABLES
The following tables describe possible causes of malfunctions and the steps to be taken to eliminate them. In the
event of faults that cannot be remedied by following the instructions below, please contact Gebr.
The pump does not reach the required vacuum
Cause
Undersized media lines
Table 7.1: Fault table 1
If the inlet or outlet cross-section is too small, not
enough volume can be evacuated or discharged. The
cross-section must be corrected in consultation with
Gebr.
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