very fast blink red= below 10 volts, def not good,batt well flat or not charging when engine running
med fast blinky red= 10-11 volts ,not good, batt well flat, or not charging when engine running
solid red=battery voltage below 12 volts, not good, batt flat or very poorly charging when engine running.
amber= ready to go, above 12 and below 12.8, expected standby voltage, or only charging poorly when engine running.may also indicate too many accessories on when running.
green then off = good to go.above 12.8 and below 14.6,charging well, all's well.
blinky green= above 14.6 ,over charging, again not good, but will get you home.seek a professional for assistance.