Bluesky 3000i charge controller not working

I have 4 Renogy 100 watt panels and 4 Trojan 31 agm battery with a bluesky 3000i charge controller not working after only 5 months.I disconnect and reconnect all it does is show r 2.5 then goes to battery voltage on the display. Can anybody help me out,and I tried to get a hold of bluesky,2 weeks and no contact from them
Comments
Otherwise, you may have to look for a replacement controller(?).
-Bill