Publication 1336 IMPACT-6.8 – November, 2002
Preface
The information in this manual is designed to help troubleshoot or
repair an Allen-Bradley 1336 IMPACT Adjustable Frequency AC
Drive with ratings B700C – B800C and C700C – C800C.
This manual is intended for qualified service personnel responsible
for troubleshooting and repairing the 1336 IMPACT 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 equipment,
equipment protection procedures and methods, and safety
precautions.
This manual describes equipment, troubleshooting and disassembly
procedures. You begin with general illustrations and end with greater
detail concerning replacement parts and part locations on the drives.
Later chapters may refer you back to earlier chapters for information
on basic equipment and steps necessary to perform detailed
diagnostics and part replacement.
!
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 the Negative Capacitor
Bus and both ends of all three bus fuses. An open fuse
does not show voltage across both ends of the fuse.
Failure to measure voltage at both ends of the fuses
may result in death or serious injury. Refer to Figure
3.5. Do not attempt to service the drive until the bus
voltage has discharged to zero volts.
Manual Objective
Who Should Use This
Manual
Safety Precautions
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