ABB Robotics OmniCore C90XT Product Manual page 392

7 Troubleshooting
7.3.4 Troubleshooting the power unit
Continued
6
7
8
9
10
11
12
392
Action
Measure the AC input voltage.
• A1.X1 - A1.K1
Check the connection from the
power inlet to the power unit.
Check the LEDs of the Ethernet
ports X3, X12 on the power unit.
Check the connection of the Ether-
net cables.
Measure the AC OK signal.
Check event log if there is a mes-
sage about DC-link voltage.
The power unit may be faulty, re-
place it and verify that the fault has
been fixed.
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Note
Use a multimeter and insulating gloves.
The AC input voltage should be 230 V.
Make sure that connector X1 is connected
properly on both ends.
• If the input voltage is normal, proceed
with step 12.
• If the input voltage is abnormal, proceed
with the next step.
• If the connection is OK, troubleshoot
LEDs are lit on the controller on page
• If there is a problem with the connection,
repair the connection and start over.
• If the LEDs are normal, proceed with step
10.
• If the LEDs are abnormal, proceed with
the next step.
• 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.
Use a multimeter and insulating gloves.
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.
If not, power unit is ok.
How to replace the unit is detailed in
the power unit on page 248.
Product manual - OmniCore C90XT
3HAC073706-001 Revision: E
No
364.
Replacing