NoteAction
• If the connection is OK, proceed with
step 12.
• If there is a problem with the connection,
repair the connection and go to step 8.
Check the connection of the Ether-
net cables.
9
Use a multimeter and insulating gloves.Measure the AC OK signal.10
The AC OK should be 0 V.
Make sure that connector X13 is connected
properly on both ends.
• If the AC OK signal is 24 V, proceed with
step 12.
• If the AC OK signal is 0 V, proceed with
the next step.
If message numbers 34401/34402, proceed with
step 12.
Check event log if there is a mes-
sage about DC-link voltage.
11
If not, power unit is ok.
How to replace the unit is detailed in Replacing
the power unit on page 358.
The power unit may be faulty, re-
place it and verify that the fault has
been fixed.
12
536 Product manual - OmniCore C30
3HAC060860-001 Revision: P
© Copyright 2019-2022 ABB. All rights reserved.
6 Troubleshooting
6.3.4 Troubleshooting the power unit
Continued
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