RPM-4A Unit LED rapidly flashing?

[Blair S.]

We received this question from a customer, and thought others might be interested in this topic...

On occasion I have seen the unit LED on an RPM-4A rapidly flash. There have been instances where this happens and there is no issue with the loads and others when this happens with led lighting loads.
I am unable to find in documentation what this might mean.

[Ty W.]

Sorry for the delay, Blair! A rapid flash of the blue "Unit" LED on the front of an RPM-4A indicates an error state on at least one zone of the RPM. To determine the error, look at the four red LED's representing the zone state.

[Yarash]

We received this question from a customer, and thought others might be interested in this topic...

On occasion I have seen the unit LED on an RPM-4A rapidly flash. There have been instances where this happens and there is no issue with the loads and others when this happens with led lighting loads.
I am unable to find in documentation what this might mean.

In general it means it detects a short.
some loads may cause this to happen even though there is no short.

it may also happen when connecting a Non-Dimmable fixture to the 4A output.

i have also seen it happen from noise on the power line