Chapter 8 - Troubleshooting/Service; Overview - Honeywell UDC2800 Product Manual

Chapter 8 - Troubleshooting/Service

Overview

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Introduction
Instrument performance can be adversely affected by installation
and application problems as well as by hardware problems. We
recommend that you investigate the problems in the following order:
installation related problems
n
application related problems
n
hardware and software related problems
n
and use the information presented in this section to solve them.
Installation related problems
Read the Installation section in this manual to make sure the
UDC2800 has been properly installed. The installation section
provides information on protection against electrical noise,
connecting external equipment to the controller, and shielding and
routing external wiring.
ATTENTION: System noise induced into the controller will
result in diagnostic error messages recurring. If the diagnostic
error messages can be cleared, it indicates a "soft" failure and
is probably noise related.
If system noise is suspected, completely isolate the controller from all
field wiring. Use calibration sources to simulate PV and check all
controller functions; i.e. Gain, Rate, Reset, Output, Alarms, etc.
Application related problems
Review the application of the controller; then, if necessary, direct your
questions to the local sales office.
Hardware and software related problems
Use the troubleshooting error message prompts and controller
failure symptoms to identify typical failures which may occur in the
controller. Follow the troubleshooting procedures to correct them.