NoteAction
Verify VDC for DC_OUT (X4):Activate safe CTRL signals and
verify DC_OUT.
12
For DSQC3070 (HV 3x380-480V), verify that
DC_OUT (X4) is 650 +/- 3% VDC.
For DSQC3069 (LV 3x380-480V), verify that
DC_OUT (X4) is 370 +/- 3% VDC.
• If the measured voltage is normal, the
unit might be faulty. See Replacing the
power unit on page 244.
• If the measured voltage is normal and
MODULE STATUS LED is steady red,
read error messages on FlexPendant
and take action. Proceed with step 13.
• If the measured voltage is abnormal and
MODULE STATUS LED is steady green,
proceed with step 15.
• If the error message is insufficient, pro-
ceed with step 14.
• If an error was resolved, restart from step
1.
Check error message on FlexPend-
ant and take appropriate action.
13
1 Turn off power for 10 seconds.
2 Disconnect DC_OUT (X4 and X8).
3 Turn on power again.
4 Activate CTRL signals.
5 The DC-BUS High Voltage LED should
turn yellow/orange and DC_OUT should
be charged to nominal voltage.
6 Verify that the disconnected load is
within specification and is not broken.
• If DC_OUT is OK and DC-BUS High
Voltage is on with the loads disconnec-
ted, proceed with step 17.
• If DC_OUT is not OK, the unit may be
faulty, see Replacing the power unit on
page 244.
Test starting with DC_OUT loads
disconnected.
14
If the connection and cables seem OK, proceed
with step 11.
Make sure that the cables are con-
nected properly at both ends:
• CTRL/FB (A1.X2)
15
If there is a problem with the connection, pro-
ceed with step 16.
If the connection and cables seem OK, restart
from step 1.
Replace cables:
• CTRL/FB (A1.X2)
16
If there is a problem with the connection, see
Troubleshooting the drive unit on page 370.
If the connection and cables seem OK, proceed
with step 18.
Make sure that the cables are con-
nected properly at both ends:
• DC_OUT (X4 and X8)
17
If DC_OUT is not OK, the unit may be faulty,
see Replacing the power unit on page 244.
If DC_OUT is not OK, the unit may be faulty,
see Replacing the power unit on page 244.
Replace cables:
• DC_OUT (X4 and X8)
18
Product manual - OmniCore V250XT Type B 389
3HAC087112-001 Revision: A
© Copyright 2023-2023 ABB. All rights reserved.
7 Troubleshooting
7.3.5 Troubleshooting the power unit
Continued
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