Electrical Troubleshooting Quiz — Dec. 15, 2020
After a recent replacement of the control module from an outdated one to the current generation, a custom-built product machine has been exhibiting strange behaviors. These are all related to communication. It seems in all cases, the system can call out, but nobody can call in.
Examples include:
- It sends text messages per various alert conditions to all the designated parties, but when anyone tries accessing the remote access control interface, they get no connection.
- The system displays the default livestream image views on smartphones, but no one can change the view.
The vendor has scoured their troubleshooting guide and even sent a second replacement module. Nevertheless, the problem persists. The manufacturer says this glitch does not exist anywhere else in the installed base.
How might you solve this dilemma?
This issue is probably due to a third-party component. Draw the entire system based on what is physically there. Number each component to identify it in a separate table. In that table, list all information that’s on any label on each item. If there’s a bar code, note that in case it needs to be read.
As you go through this process, you may spot a third-party component. For example, maybe you have a filter between an original communication component and the control module. If so, note the connections, and then remove this component from the system. Try the system again. If it works, then provide this information to the manufacturer and ask how to replace that functionality. If it doesn’t work, then send your drawing and chart to the manufacturer and ask them if anything is not theirs.
About the Author
Mark Lamendola
Mark is an expert in maintenance management, having racked up an impressive track record during his time working in the field. He also has extensive knowledge of, and practical expertise with, the National Electrical Code (NEC). Through his consulting business, he provides articles and training materials on electrical topics, specializing in making difficult subjects easy to understand and focusing on the practical aspects of electrical work.
Prior to starting his own business, Mark served as the Technical Editor on EC&M for six years, worked three years in nuclear maintenance, six years as a contract project engineer/project manager, three years as a systems engineer, and three years in plant maintenance management.
Mark earned an AAS degree from Rock Valley College, a BSEET from Columbia Pacific University, and an MBA from Lake Erie College. He’s also completed several related certifications over the years and even was formerly licensed as a Master Electrician. He is a Senior Member of the IEEE and past Chairman of the Kansas City Chapters of both the IEEE and the IEEE Computer Society. Mark also served as the program director for, a board member of, and webmaster of, the Midwest Chapter of the 7x24 Exchange. He has also held memberships with the following organizations: NETA, NFPA, International Association of Webmasters, and Institute of Certified Professional Managers.