3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL 173/186
10 PREVENTIVE AND CORRECTIVE MAINTENANCE
When the DC link has discharged completely, the status line displays
ReadyOn and the SUPPLY OFF pushbutton changes to a
permanent light.
4. Rack-out, lock-out, ground and tag-out the main circuit breaker.
5. Wait until the yellow lamp GROUNDING SWITCH UNLOCKED lights up.
Because cooling of the drive continues for a preset time after
switching off the main power supply, the yellow lamp lights up with
a delay.
If the lamp does not light up and there is a reason to believe that the
grounding circuit is malfunctioning.
Note: For more information, “10.4 Removing the CDP control panel”
on page 165.
6. Once the yellow lamp GROUNDING SWITCH UNLOCKED is lit, turn the
grounding switch to the grounded position.
7. When the grounding switch is in the grounded position, the status
line alternates between DCGnd NOpen, NotReadyOn, StateINU
NotRdy.
8. If necessary, open the doors of medium voltage compartments
according to “10.6.3 Opening and closing the doors” on page 174
9. Switch off and lock-out all auxiliary supply voltages from
external sources.
The drive is now de-energized, and safe access is possible.
1 L -> 600.0 rpm
StateINU ReadyOn
MOTOR SP 0.00 rpm
POWER 0.0 kW
1 L -> 600.0 rpm
StateINU DCGnd NOpen
MOTOR SP 0.00 rpm
POWER 0.0 kW
Alternating display message:
• DCGnd Nopen
• NotReadyOn
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