Article 4.7.2A Breaker of connected iELR is not Tripping during manual Test.
If Trip indication and command is displayed on the meter after manually tripped. Then Check the changeover of NO & NC of iELR with COM.
If that also works then there is a problem in connected Breaker not in iELR.
And, If NO & NC changeover not done on a relay. That means It has to be sent to the service center.