Grounding Switch Is Not Released - ABB ACS5000 User Manual

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A limit switch monitors the locked position of the locking bars. If any
door of a medium voltage compartment is not locked properly, you
cannot start the drive.
10.6.4

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.
IMPORTANT! Do not use force for turning the grounding switch in
any direction. The handle and / or the switch could get damaged.
If the lamp does not light up, proceed as follows:
1) Verify that the main circuit breaker (MCB) is in the open position.
2) Check the drive status on the CDP control panel.
The drive status should be ReadyOn, indicating that the DC link has
discharged and the MCB has opened.
3) Check the actual value of the DC-link voltage on the CDP
control panel.
The actual value (parameter 2.30 DC Volt 1-3 MaxVal) must be
< 50 V (discharged).
4) Check if there are any alarm and fault messages on the display.
If there are alarms / faults, contact the ABB service organization
3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL
10 PREVENTIVE AND CORRECTIVE MAINTENANCE
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