ABB Procontic CS 31 Central Unit, Model: 07KR31

Dear sir,

As we are using ABB Make CS 31 Product which is Procontic CS 31 Central Unit, and its cat no. is 07KR31.

It has two LEDS, and one belongs to run, and other LED is adjacent to the Stop/RUN switch.

The RUN LED is indicating green, and it's ok.

The other LED, which is close to the Stop/RUN switch is continuosly blinking.

I ask you to please advise me, what does it mean for Blinking RED?

Regards,
Ravi