ABB OmniCore C30 Product Manual page 552

6 Troubleshooting
6.3.10 Troubleshooting the power supply
Continued
Troubleshooting flowchart
Power supply is ok
xx1800001823
Troubleshooting procedure
The troubleshooting table is supposed to be used as a detailed instruction together
with the troubleshooting flowchart.
1
Continues on next page
552
Green
24V < DC < 27V
Short circuit
Repair short on A1
circuit
Connection
not ok
Repair AC
connection
AC not ok
Repair AC input
Faulty cable
Repair cabling
Test
Check the LED (labelled DC OK) on
the power supply.
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Troubleshooting the
power supply
Check DC LED
Off
DC > 27V
Measure DC output
DC < 24V
Short circuit on
power supply
Check for short circuit
on output
No short circuit
Measure power AC ok
supply AC input
AC not ok
Check AC connection
between power supply
and A1
Connection ok
Measure AC to
controller
AC ok
Check cabling
Cable ok
Troubleshoot the
power unit
Note
If the LED is:
• Green: the power supply should be
working properly.
• Off: either the power supply is faulty or
it does not have sufficient input voltage.
Proceed with step 2.
Replace power
supply
Product manual - OmniCore C30
3HAC060860-001 Revision: P