148 ACS2000 DFE UM 3BHS360367 ZAB E01 REV. K
10.6.4 Grounding switch is not released
When the DC link of the drive has been discharged,
the pushbutton GROUNDING SWITCH UNLOCKED
lights up to indicate that the grounding switch is
released and can be turned to the grounded posi-
tion. If the pushbutton does not light up, proceed
as follows:
1. Do not force the grounding switch in any direc-
tion.
2. To test the lamp GROUNDING SWITCH
UNLOCKED, activate the lamp test with param-
eter 16.7.
(For information on setting parameters, see 9.6
Parameters mode.)
- If the pushbutton does not light up, replace
it.
- If the pushbutton lights up after it was
replaced, continue with step 7..
- If the pushbutton does not light up after it
was replaced, continue with step 3..
3. Verify that the MCB (main circuit breaker) is
open.
- If the MCB is open, check that it is locked
out.
- Check if the SUPPLY OFF lamp is lit.
If the pushbutton is lit, the feedback signal
“main circuit breaker open” is present at dig-
ital input DI09 of I/O module A3411.
4. Check if the LED of digital output DO03 (I/O
module A3401) is lit.
If the LED is lit, the grounding switch is
released.
5. Check the discharging level of the DC link.
If the value of parameter 2.01 DC VOLTAGE is
below 50 V, the DC link is discharged.
If the DC link is discharged, the message
ReadyOn is displayed on the CDP control panel.
6. Verify that hazardous voltages from the motor
cannot be fed into the drive.
7. Carefully turn the grounding switch to the
grounded position if it has been verified:
- that hazardous voltages cannot be fed into
the drive from the main power supply or the
motor,
- that the DC link is discharged,
- that the grounding switch is released (DO03
is energized).
- that the drive status is ReadyOn.
If you cannot turn the grounding switch, con-
tinue with 10.6.6 Emergency release of the
door safety switch.
8. Switch off and lockout all auxiliary voltages
from external sources.
9. Verify that the drive system is de-energized.
10. Ground the drive with a grounding set (option).
1 L ->
0.0 rpm
StateINU
ReadyOn
MOTOR SP 0.00 rpm
POWER
0.0 kW
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