3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL 171/186
10 PREVENTIVE AND CORRECTIVE MAINTENANCE
10.6.1 Safety
▲ DANGER ⚠
Hazardous voltages!
Before starting to work on the drive, make sure:
• Main and auxiliary power supply to the drive are switched off,
locked out, and tagged out,
• Drive is de-energized
• Grounding connections are in place
• Personal protective equipment is provided and used when required
• Everyone involved is informed
Before energizing the drive again, make sure:
• All foreign objects are removed from the drive
• All internal and external covers are securely fastened and all doors
are closed, locked and / or secured (locking bar in locked position)
• Release dials of safety switches are in locked position
• When maintenance on the drive is carried out, such as changing of
semiconductors, grounding equipment must be connected at the
appropriate locations.
The grounding equipment ensures that hazardous voltages cannot
be fed into the drive, from the main power supply or the motor.
▲ WARNING ⚠
Hazardous DC voltage!
Depending on the type of auxiliary supply, the drive can be equipped with
buffer capacitors inside the control unit. During operation, the capacitor
voltage is 300 V (DC).
• Wait 5 minutes for the capacitors to discharge.
• Before touching a capacitor, verify that the capacitors
are discharged.
▲NOTICE
Foreign matter and particularly metallic dust can cause failure and
damage when the drive is energized!
Ensure that foreign matter cannot enter the cabinet:
• Close the doors and cover openings completely when work is
discontinued.
• Retrieve any foreign matter which accidentally dropped into the
cabinet.
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