10 PREVENTIVE AND CORRECTIVE MAINTENANCE
3BHS212794 E01 REV M ACS6000 USER MANUAL 234/278
Figure 10-8 Grounding switch grounded
When the grounding switch is in the grounded position, the control
panel shows the following information:
7. To open the doors of medium voltage units, continue with “10.4.4
Unlocking and opening the doors” on page 236.
Note: To open the doors of medium voltage units, auxiliary voltage
is required.
8. Switch off and lock out all auxiliary voltages from external sources.
9. To connect a grounding set, continue with “10.4.8 Connecting a
grounding set” on page 242.
10.4.3 Grounding the drive when the grounding switch is not released
When the DC link of the drive has been discharged, the lamp GROUNDING
SWITCH UNLOCKED lights up to indicate that the grounding switch is
released and can be turned to the grounded position. If the lamp does not
light up, take the following steps.
1. Check that the auxiliary voltage is switched on.
NOTICE DO NOT use force for turning the grounding switch in
any direction
2. Press the lamp cap to test the lamp.
(1) White lamp (2) Yellow lamp
2
1 L -> 600.0 rpm
StateINU DCGnd NOpen
MOTOR SP 0.00 rpm
POWER 0.0 kW
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