Honeywell UDC3500 - 7.7.4 Procedure #4 - Time Proportional

Troubleshooting/Service
3/07 UDC3500 Universal Digital Controller Product Manual 307
7 Troubleshooting/Service
7.1 Overview
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
• application related problems
• hardware and software related problems
and use the information presented in this section to solve them.
What’s in this section?
The following topics are covered in this section.
TOPIC See Page
7.1 Overview 307
7.2 Troubleshooting Aids
• Overall Error Messages
• Controller Failure Symptoms
• Customer Support
• Determining the Software Version Number
308
7.3 Power-up Tests 310
7.4 Status Tests 310
7.5 Background Tests 311
7.6 Controller Failure Symptoms 316
7.7 Troubleshooting Procedures
• Power Failure
• Current Proportional Output Failure
• Position Proportional Output Failure
• Time Proportional Output Failure
• Time/Current – Current/Time Proportional Output
Failure
• Alarm Relay Output Failure
• Keyboard Failure
• Analog Input Failure
• RS-485 Communications Failure
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