1/01 UDC3300 Limit Controller Product Manual 69
Section 7 – Troubleshooting / Service
7.1 Overview
Introduction
Instrument performance can be adversely affected by installation and
application problems as well as 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.
If a replacement of any part is required, follow the procedures listed under
“Replacement Procedures”.
WARNING—SHOCK HAZARD
!
INPUT CALIBRATION MAY REQUIRE ACCESS TO
HAZARDOUS LIVE CIRCUITS, AND SHOULD ONLY BE
PERFORMED BY QUALIFIED SERVICE PERSONNEL.
MORE THAN ONE SWITCH MAY BE REQUIRED TO DE-
ENERGIZE UNIT BEFORE CALIBRATION.
What’s in this
section?
The following topics are covered in this section.
Topic See Page
7.1 Overview 69
7.2 Troubleshooting Aids 71
7.3 Power-up Tests 73
7.4 Status Tests 74
7.5 Background Tests 76
7.6 Controller Failure Symptoms 78
7.7 Troubleshooting Procedures 79
7.8 Parts Replacement Procedures 83
7.9 Maintenance (Cleaning) 92
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