3BHS212794 E01 REV M ACS6000 USER MANUAL 235/278
10 PREVENTIVE AND CORRECTIVE MAINTENANCE
• 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.
• If the LED is lit, the grounding switch is released.
6. Check the discharging level of the DC link.
• If the value of the parameter 2.01 DC VOLTAGE
is below 50 V, the DC
link is discharged.
• If the DC link is discharged, the drive is in “ReadyOn” status.
• Check that the message ReadyOn is displayed on all control panels
of the drive.
7. Carefully turn the grounding switch to the grounded position on the
following conditions:
• Hazardous voltages cannot be fed into the drive from the main
power supply or the motor
• DC link is discharged
• Grounding switch is released (DO07 is energized)
• Drive status is “ReadyOn”
1 L -> 0.0 rpm 0
StateINU ReadyOn
MOTOR SP 0.00 rpm
POWER 0.0 kW
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