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Troubleshooting flowchart
Troubleshooting the
power supply
Check DC LED
Power supply is ok
Green
Off
Repair short
circuit
Measure DC output
Check for short circuit
on output
Measure power
supply AC input
Check AC connection
between power supply
and A1
Measure AC to
controller
Check cabling
Repair AC
connection
Repair AC input
Repair cabling
24V < DC < 27V
DC < 24V
DC > 27V
Short circuit on
power supply
Short circuit
on A1
No short circuit
AC ok
AC not ok
Connection ok
AC ok
AC not ok
Connection
not ok
Faulty cable
Cable ok
Troubleshoot the
power unit
Replace power
supply
xx1800001823
Troubleshooting procedure
The troubleshooting table is supposed to be used as a detailed instruction together
with the troubleshooting flowchart.
Note
Test
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
.
Check the LED (labelled DC OK) on
the power supply.
1
Continues on next page
552
Product manual - OmniCore C30
3HAC060860-001 Revision: P
© Copyright 2019-2022 ABB. All rights reserved.
6 Troubleshooting
6.3.10 Troubleshooting the power supply
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Summary of Contents for OmniCore C30
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