Status Indication - ABB ESP M1R Installation Instructions Manual

The ESP protector should not be reconnected until the
cause of the fault has been identified and rectified.
Note: The ESP unit may have suffered damage - check the
status indication (see section 6).
6.

Status indication

ESP units give a continuous visual display of their status.
They have a two colour indicator light, for each phase and
neutral:
Green only
Green + Red = WARNING. Reduced protection, replace
Red only
No lights
6/1 | Installation instructions for mains wire-in protectors
= Full protection, power on.
unit as soon as possible.
= NO PROTECTION. Replace ESP unit
immediately.
= No power connection or system fault.
Check external fuses and connections.