Instructions

Troubleshooting
31
9 Troubleshooting
Observe the safety instructions in Ch. Safety, from page 6 on.
Troubleshooting of the vibrators may only be performed by regularly
trained, authorised and qualified personnel. Work on the electrical system
may only be carried out by a qualified electrician.
The qualified personnel has to work exclusively with tools suitable for the
application.
In the case of unauthorised intervention in the NEA/NEG there is no longer
any warranty claim.
Before any troubleshooting the NEA/NEG must be safely disconnected
from the electrical mains. The procedure is as follows:
1. Switch off NEA/NEG.
2. Secure against unintentional switching on.
3. Determine that NEA/NEG are voltage free.
4. Earth and short-circuit.
5. Cover and fence off neighbouring live parts.
Interventions in the NEA/NEG must not be performed in potentially ex-
plosive atmospheres.
Fault
Possible cause
Troubleshooting
Action
Vibrator does not start or
runs at too low speed
Phase interruption
Check fuse and connection
cable
Replace fuse and/or connec-
tion cable
Mains voltage too low
Check mains voltage and
cable cross-section
Correct mains voltage, re-
place cable
Vibrator speed drops under
load
Wiring wrong
Check circuit diagram
Inadequate contact of a
connection point
Check connections in the
terminal box
Tighten terminal plate nuts
Phase interruption
Check fuse and connection
cable
Replace fuse or connection
cable
Incorrectly dimensioned
connection cable
Check cable cross section
Replace cable
Overload
Check setting of unbalance
Reduce unbalances
Mains voltage too low
Check mains voltage and
cable cross-section
Correct mains voltage, re-
place cable
Expertise and
regulations
Trouble-
shooting