11 PREVENTIVE AND CORRECTIVE MAINTENANCE
3BHS213401 E01 REV H ACS1000 AIR-COOLED USER MANUAL 163/184
4. Rack-out, lock-out, ground and tag-out the main power feeder.
5. If the grounding switch is equipped with the optional lock (1) that secures the switch in the
ungrounded position, unlock the grounding switch.
6. Wait until the yellow lamp GROUNDING SWITCH UNLOCKED lights up.
The lamp lights up when cooling stops after a delay time.
- If the yellow lamp is on, continue with “11.6.3 Grounding” on page 164.
- If the yellow lamp is not on, continue with “11.6.4 Grounding switch is not released”
on page 164.
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