Watlow QPAC Modular SCR Power Control Service - Manual (Page 2)

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WATLOW QPAC Service Manual
Contents
Use The Manual
How to Use the Manual
• General Description • Indication of Malfunction • Specifications
• Cleaning Fans, Fins,Filter • Tightening Connections • Periodic Test Runs
• Base & Firing Cards • Operation Theory
• Test Procedures
• Troubleshooting • Bench Testing • SCRs
• Waveforms and Schematics
Notes
The user's manual contains informational notes to alert you to important details. When you
see a note icon, look for an explanation in the margin.
Safety Information
This user's manual also has boldface safety information notes to protect both you and your
equipment. Please be attentive to them. Here are explanations:
The Caution symbol (exclamation point) in the wide text column alerts you to a "CAUTION",
a safety or functional hazard which could affect your equipment or its performance. A full
explanation is in the narrow column on the outside of the page.
The Warning symbol (lightning bolt) in the wide text column alerts you to a "WARNING", a
safety hazard which could affect you and the equipment. A full explanation is in the narrow
column on the outside of the page.
Technical Assistance
If you encounter a problem with your Watlow control, review all of your configuration infor-
mation to verify that your selections are consistent with your application... Inputs, Outputs,
Alarms, Limits, etc. If the problem persists after checking the above, you can get technical
assistance by dialing: 1-507-454-5300
An Applications Engineer will discuss your problem with you.
Please have the following information available when calling:
• Complete model number • Bar Code Number
• All configuration information • User's Manual
Your Feedback
Your comments or suggestions on this manual are welcome, please send them to:
Technical Writer, Watlow Controls, 1241 Bundy Blvd., Box 5580, Winona, MN 55987-5580,
Phone: 507/454-5300, Fax: 507/452-4507. The QPAC Service Manual is copyrighted by
Watlow Winona, Inc., © 1994, with all rights reserved.
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NOTE:
Details of a “Note”
appear here in the
narrow box on the
outside of each page.
CAUTION:
Details of a “Caution”
appear here in the
narrow box on the
outside of each page.
WARNING:
Details of a “Warning”
appear here in the
narrow box on the
outside of each page.
Chapter 1, Page 4
Chapter 2, Page 8
Chapter 3, Page 9
Chapter 4, Page 15
Chapter 5, Page 17
Appendix, Page 31