Fault Finding Principles - ABB Advant Controller 450 User Manual

®
Advant Controller 450 User's Guide
Chapter 5 Maintenance

5.5.3 Fault Finding Principles

5-34
Introduction
Perform fault finding in a systematic and logical manner.
You must make a distinction between a system which has been in operation and a system which
has not been operated previously. In the latter case, always check the following indications first,
if relevant:
• The cabinet has mains voltage connected
• All circuit boards are plugged in correctly
• All connections are made correctly
• All boards are jumpered correctly.
If these checks do not correct the malfunction, continue with the procedures described below.
Fault Finding Principles
You are notified of a fault in one or several ways, as described in
Fault Announcement.
Three main "gateways" to the source of failure can be distinguished.
notification of faults and the principles for fault finding.
If a central operator station is available, you should especially watch for opportunities to point
out a faulty replaceable unit outgoing from a system message and information given in the
system status displays. See
Messages. You can treat most fault finding then, in principle, as indicated under the heading
Typical Simple Scenario below.
In a more complicated situation, other measures are applicable.
See A Complex Scenario below.
The concept of FDS and LDS in
support:
FDS - Full Diagnostics Support
A faulty unit/function is pointed out.
LDS - Limited Diagnostics Support
A complex indication exists which warrants further manual fault finding.
With respect to the necessary outfit when fault finding and, to a certain degree, the need for
skilled personnel, there is a division in basic and advanced fault finding.
Basic fault finding with full diagnostics support is covered by this User's Guide. Advanced fault
finding with limited diagnostics support is only briefly dealt with here.
Advanced fault finding presume practical knowledge in fault finding. Training courses are
arranged by
Automation University Sweden
Section 5.5.2.1, System Status and Plain Language System
Figure 5-14 represents different qualities of diagnostics
, Training Center.
Section 5.5.2, Diagnostics and
Figure 5-14 illustrates the
3BSE 002 415R701 Rev A