Hello i have a Transfer control device ATC 3100 EN

and i have a problem is flashing 4 leds 

AT + AR

MANUAL

AT

GENERATOR

why is hapening this in fault says  ( If these 4 LEDs flash together, a system failure has occurred. )

Hello,

please find the meaning of these flashing LEDs (system failure) in the manual…

https://support.industry.siemens.com/cs/ww/en/view/100341671

…beginning on page 16.

This system failure can be generated by several reasons - if you need help, please open a SR under following link:

https://sieportal.siemens.com/de-de/mysieportal/support-requests/create