ABB OmniCore V400XT - Troubleshooting Units

7.3 Troubleshooting units
7.3.1 Troubleshooting LEDs in the controller
Description
The controller features a number of indication LEDs, which provide important
information for troubleshooting purposes. If no LEDs light up at all when switching
the system on, troubleshoot as detailed in this section.
All LEDs on the respective units, and their significance, are described in the
following sections.
Units with LEDs in the controller
Troubleshooting the drive unit on page 368Drive unit
Troubleshooting the additional drive unit on page 374Additional drive unit
Troubleshooting the power unit on page 381Power unit
Troubleshooting fieldbuses and I/O on page 394Scalable I/O
Troubleshooting the 3G Connected Services gateway
on page 395
3G Connected Services gateway
Troubleshooting the 4G Connected Services gateway
on page 401
4G Connected Services gateway
Troubleshooting the Ethernet switch (DSQC1035) on
page 412
Ethernet switch
Troubleshooting the main computer on page 414Main computer
Troubleshooting the power supply, ODVA on page 420
and Troubleshooting the process power supply on
page 419
Power supply
366 Product manual - OmniCore V400XT
3HAC081697-001 Revision: A
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7 Troubleshooting
7.3.1 Troubleshooting LEDs in the controller