Grounding The Drive When The Grounding Switch Is Not Released - ABB ACS5000 User Manual

10.6.4. 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 turn on, take the following steps.
1. Check that the auxiliary and control voltage are switched on.
NOTICE DO NOT force the grounding switch in any direction.
2. Press the lamp cap to test the lamp.
• Lamp off: lamp is defective or the lamp-test circuit is faulty
NOTE – Since the lamp-test circuit is independent of the grounding circuit, the lamp
remaining off does not indicate a faulty grounding and/or discharging circuit.
• Lamp on: malfunction in the discharging circuit and/or the grounding circuit
3. Verify that the MCB (main circuit breaker) is open.
• Press the EMERGENCY OFF pushbutton on the COU door according to Section 8.9.1,
"Stopping the drive in an emergency", page 133
• If the MCB is open, secure the MCB against closing.
• Check if the LED of digital input IO (input module A2531, input C1_P3_I0 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 R1 (output module A2521, C1_P1_R1 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 9.91 DC voltage max value is below 50 V, the DC link is
discharged.
7. Carefully turn the grounding switch to the grounded position under 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
• Drive status is "Emergency Off"
IMPORTANT! If you still cannot turn the grounding switch, continue with Section 10.6.5,
"Emergency release of a door safety switch", page 174.
For information on the wiring of the control circuit, see the project-specific wiring diagrams in
"Appendix D – Wiring diagrams".
PRODUCT
ACS5000W gen. 2
DOCUMENT KIND
User manual
PREVENTIVE AND CORRECTIVE MAINTENANCE
DOCUMENT ID.
3BHS799208 E01
REV. LANG. PAGE
J en 173/186