Frequently asked questions
What does the red LED indicate on the RM4TU relay when it is on?
FA105963
08 June 2022
Issue:RM4TU unit has a red LED turned on
Product Line:
Zelio Industrial Measurement and Control Relays
Environment:
All Phase Monitoring Relays
Cause:
Flashing red light
Resolution:
It indicates an undervoltage fault.