Technical Bulletin

Improved Torqmax software upgrade

Advisory

Date

March 12, 2004

Reference

136

Route to

Modernization Manager/Service Manager

From

MCE Technical Support Department

Equipment

All VFMC-1000 (PTC) controllers designed with the MCE Torqmax AC drive.

Description

In the course of ongoing product improvements at MCE, we have observed that due to some anomalies such as voltage fluctuations and electrical noise, the AC drive unit may detect a fault and shutdown. In order to eliminate these nuisance intermittent shutdowns, MCE has made the Torqmax AC drive software capable of recovering from these faults thus eliminating such intermittent shutdowns.

Action

If you are experiencing intermittent shutdowns (normally indicating MLT on the controller) that may or may not be accompanied by faults on the Torqmax drive, or if you are unsure whether a problem you are experiencing may be related to this issue, call MCE Technical Support to troubleshoot the problem. If necessary, MCE will send new software and/or hardware to correct the problem.

Help

Should you require additional technical assistance:

• Telephone 916/463-9200
• Touch "6" for Technical Support
• Refer to the reference number above