PREVENTIVE AND CORRECTIVE MAINTENANCE
PRODUCT
ACS1000W
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS213400 E01
REV.
J
LANG.
en
PAGE
154/166
11.6.5. Checking the release conditions for the grounding switch
1) Check that the auxiliary voltage is switched on.
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2) Main power supply is disconnected from the drive.
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Check that the MCB is open.
When the MCB is open, secure it against closing.
□
–
Check that the feedback signal "MCB is open" arrives at the drive, ie, if the
following indicators are lit:
•
LED of digital input DI08 of I/O module -A5201 (-A2)
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–
(LED is not lit)
Check the control-signal wiring between switchgear
and drive as per applicable wiring diagram.
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•
MAIN SUPPLY ON push button -S5152 (-S2)
When the LED and the push button are lit, the feedback signal “MCB is
open” has arrived at the drive.
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–
(Push button is not lit)
Check if the 24 V blade-type fuse (X27_P2:14)
is blown.
The fuse protects the control circuit of the pushbutton.
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3) Discharge level of the DC link.
–
Check if the value of parameter 2.06 DC VOLTAGE is below 50 V.
When the value is below 50 V, the DC link is regarded as discharged. For
information on reading actual values on the CDP control panel, see
Section 10.3.2 Actual signals mode
.
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4) GROUNDING SWITCH UNLOCKED lamp and the wiring of the lamp.
–
Check if the CDP control panel displays a fault.
A fault prevents the lamp GROUNDING SWITCH UNLOCKED from lighting.
•
If a fault is present, follow the instructions in
, before you reset a fault.
•
If a fault cannot be rectified and reset, contact the ABB
service organization.
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–
If the CDP control panel does not display a fault, check that digital output DO04
of I/O module -A5191 (-A1) is energized.
•
DO04 releases the grounding switch and lights the lamp GROUNDING
SWITCH UNLOCKED (–H5152).
•
When the LED of DO04 is lit and the control voltage is present at
terminals X24:2 and X24:3 of DO04, DO04 is energized.
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