Bailey Symphony Conductor VMS 42 Series, Instruction

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WBPEEUI220771A0 4 - 1
Section 4
Troubleshooting
Introduction
This section provides some basic troubleshooting guidelines for
the Conductor VMS Series 42 Auxiliary Terminal. It is not
meant to be all inclusive. Be sure to have all the manufac-
turer’s documentation on non-Elsag Bailey Process Automa-
tion components accessible. Also refer to Table
1-1 for any
applicable Elsag Bailey documents. Many of those documents
also provide troubleshooting information. If problems exist
that are not included in any of the documentation, contact the
local Elsag Bailey service office for assistance.
This section contains a general troubleshooting table and a
troubleshooting sequence flowchart that directs troubleshoot-
ing personnel to the appropriate procedures.
NOTE: Put circuit boards containing MOS devices into antistatic bags when
stored or shipped back to the factory. Do not repair circuit boards in the field. All
repairs and adjustments should be performed by qualified personnel.
Troubleshooting
Table 4-1 is a general troubleshooting guide. If the general
troubleshooting guide does not eliminate the problem, refer to
Figure
4-1 and follow the troubleshooting sequence
.
Table 4-1. Troubleshooting Guide
Symptom Possible Problem or Solution
No power indicator on
circuit No AC power at auxiliary terminal. Check AC wiring on input. Check AC
on PEP or keyboard interface assembly. Check breaker light on PEP or
keyboard interface assembly.
Breaker off but indicator
on Check breaker contacts. Check breaker wiring. Check AC input wiring.
Improper/ incomplete
start-up Refer to the CPU instruction shipped with the auxiliary terminal.