PREVENTIVE AND CORRECTIVE MAINTENANCE
PRODUCT
ACS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS212794 E01
REV.
N
LANG.
en
PAGE
220/266
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 221.
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 229.
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.
• Lamp does not light up:
– Lamp is burnt out
– Lamp-test circuit is faulty.
The lamp-test circuit and the grounding circuit are independent of each other.
From the lamp not lighting up, it cannot be concluded that the discharging
circuit and / or the grounding circuit are not working.
• Lamp lights up:
– Discharging circuit and / or the grounding circuit are malfunctioning.
3. Verify that the MCB (main circuit breaker) is open.
• If the MCB is open, secure it against closing.
• Check if the LED of digital input DI14 (input module A2531 in COU1) is lit.
• If the LED is lit, the feedback signal "MCB is open" is present.
4. Verify that hazardous voltages from the motor cannot be fed into the drive.
5. Check if the LED of digital output DO07 (output module A2541 in COU1) is lit.
1 L -> 600.0 rpm
StateINU DCGnd NOpen
MOTOR SP 0.00 rpm
POWER 0.0 kW
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