Is it flashing from bat to flow eraticly
Hi JK as previous comment you can reset the controller by powering off and pulling the Inline Fuse, Leave the fuse out for 5 minutes so the circuit completely powers down then replace the fuse.
Also check Cables and connections are in good condition and tight, Replace any that are worn or corroded including the fuse and fuse holder. Check the battery terminal connections are also tight. Loose connections can create power issues.