ABB ACS1000 User Manual page 169

b) If the CDP control panel does not display a fault, check that digital output
c) If digital output DO04 of the I/O module is not energized, check the I/O
d) Check that LED V726 and LED V740 of the I/O module -A5191 are lit.
e) If digital output DO04 I/O module -A5191 is energized, check that the
5. Check that hazardous voltages from the motor cannot be
fed into the drive.
Important: When the checklist is completed, carefully try to turn the grounding switch to the
grounded position.
If you cannot turn the grounding switch but doors of medium voltage
compartments have to be opened, call the ABB service organization.
3BHS213401 E01 REV H
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.
module -A5191 (-A1).
To do this, check if the auxiliary voltage is present at the supply terminals
of the I/O module.
- X6:1.....24 V (DC)
- X6:2.....0 V
The LEDs monitor the control voltages of the I/O module (Fig. 11-3).
When the LEDs are lit, the I/O module functions properly.
- LED V726.....24 V (DC)
- LED V740.....5 V (DC)
control voltage is present at the terminals of the lamp GROUNDING
SWITCH UNLOCKED.
- If the control voltage is present but the lamp is not lit, the lamp is burnt
out. Replace the lamp.
- If the control voltage is not present, check the wiring of the lamp.
Correct the wiring if necessary.
ACS1000 AIR-COOLED USER MANUAL
11 PREVENTIVE AND CORRECTIVE MAINTENANCE
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