ABB ACS580MV, Hardware Manual

Page: 108 / 146

108 Maintenance
Procedure:
1. Open the INU door.
2. Connect the voltage divider probe to the volt-/multimeter and select the appropriate
metering range (see the instruction manuals of the devices).
3. Connect the grounding clip of the voltage divider probe to the cabinet (PE busbar, see
the instruction manual of the probe).
4. Touch the power terminals in front of each power module with the contact electrode of
the probe and check that the voltage is below 50 V.
5. Touch again the power terminals of each power module with the contact tip of the
grounding hook to fully discharge the circuit.
6. Hang the grounding hook to the terminal of the power module to be serviced and leave
it there until work on the module is finished.
7. Make sure again that all power module terminal voltages are below 50 V. Use a
multimeter and measure the voltage between the grounded power terminal and all
other power module terminals before working on the power module.
Starting the drive after maintenance
See Chapter Operation, Energizing and starting the drive for instructions on energizing the
drive using the local operator panel of the drive. If the drive is remotely-controlled, follow
the established start-up procedures.
Emergency release of the door safety switch
The door of the INU compartment is secured by a safety switch (item 1 in figure below).
DANGER
Hazardous voltages!
Touching energized components can be fatal.
Before you unlock the safety switch, verify that the drive is de-energized.
Do not unlock the safety switch permanently.