I have to make a correction. The wiring diagram does mention about the red and green lites. It says green means 3.3vdc supply on. Hbeat led green 1 second on, 1 second off means control is powered. Comm red means communication with main control. DC bus red means bus charged. Hbeat red blinks 1 second on, 1 second off, when control is powered. 12 vdc red means control is powered. But the does not have fault code to tell what the problem is. Lease help, I cannot find any info about this problem.