Troubleshooting guide

Chapter
1
Introduction
Manual Objectives
This document is intended as a supplementary addition to the 1336 PLUS
6.1 Troubleshooting Guide. This supplement covers the additional
information you will need to help troubleshoot or repair an Allen-Bradley
Bulletin 1336 PLUS II Adjustable Frequency AC Drive with A1 - A4
Frames.
Who Should Use This
Manual
This manual is intended for qualified service personnel responsible for
troubleshooting and repairing the 1336 PLUS II Adjustable Frequency AC
Drive. You should:
• Read this entire manual before performing maintenance or repairs to
drives.
• Have previous experience with, and basic understanding of, electrical
terminology, procedures, required troubleshooting equipment, equipment
protection procedures and methods, and safety precautions.
!
ATTENTION:
Some printed circuit boards and drive
components may contain hazardous voltage levels. Remove and
lock out power before you disconnect or reconnect wires, and
before you remove or replace fuses and circuit boards. Verify bus
voltage by measuring the voltage between +DC and -DC on
Terminal Block TB1. Do not attempt to service the drive until the
bus voltage has discharged to zero volts.
ATTENTION:
Potentially fatal voltages may result from
improper useage of oscilliscope and other test equipment. The
oscilliscope chassis may be at a potentially fatal voltage if not
properly grounded. If an oscilliscope is used to measure high
voltage waveforms, use only a dual channel oscilliscope in the
differential mode with X 100 probes. It is recommended that the
oscilliscope be used in the A minus B Quasi-differential mode with
the oscilloscope chassis correctly grounded to an earth ground.
ATTENTION:
Only personnel familiar with the 1336 PLUS II
AC Drive and associated machinery should plan or implement the
installation, start-up and subsequent maintenance of the system.
Failure to comply may result in personal injury and/or equipment
damage.