Troubleshooting communication failure in Relay 2500, 3500, and 4500
Learn how to troubleshoot communication failure in Relay 2500, 3500, and 4500
Products affected: Relay™ 2500, Relay™ 3500, Relay™ 4500
Issue
Error opening COM or communication failure
Cause
Power cord not connected
Resolution
- Verify the power cord is firmly connected and the wall socket is on
- Turn the power switch on
UPDATED: 30 June 2021