ABB OmniCore V400XT Product Manual page 348

7 Troubleshooting
7.2.1 No LEDs are lit on the controller
Continued
Detailed working procedure
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Action
Make sure that the mains switch (Q0) has been
switched on.
Make sure that the system is supplied with power.
• Measure incoming mains voltage and make
sure the voltage is within the normal range.
Check that the mains connection (X0) is properly
connected.
Tip
For more details, see Circuit diagram - OmniCore
V400XT.
Check that the AC input cable is properly connec-
ted.
Check the output voltage of (Q0).
• Make sure that (Q0) is closed.
Check the fuse (F1).
Check connector A1.X1.
Check the LED status.
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Note
Use a multimeter and insulating
gloves.
If incoming mains is not ok, the
problem is not in the robot control-
ler. Troubleshoot incoming mains.
Use a multimeter and insulating
gloves.
Replace if damaged.
• If abnormal, troubleshoot
the power unit. See
Troubleshooting the power
unit on page 381.
• If abnormal, troubleshoot
the LEDs. See
Troubleshooting LEDs in the
controller on page
Product manual - OmniCore V400XT
3HAC081697-001 Revision: A
366.