I have twin Yanmar
3GM30F on our Lagoon 380
. House bank of 480AH, plus start batteries for each motor
. All are combined.
Two weeks ago while trying to track down a phantom load on the starboard start battery
that seemed to lose charge overnight, I found a relay that was hot all the time. I traced the wires from the relay & all appeared to go to a connection box that used to be connected to the old motor
driven refrigeration compressor
system. This old motor driven compressor
system was removed ages ago. I removed the wire that went to the relay from the +terminal on the alternator
and the phantom load to the battery
However, now I notice that when both the port & starboard motors are running AND the batteries are fully charged AND with no electrical system
loads on, the starboard "Charge Light" flashes on the dashboard panel. If I shut down the port motor it stops flashing, or if I apply a load to the electrical system
eg. turn on a pump, with both motors running it also stops flashing.
is definitely charging
as the battery monitor
shows amps & volts when the starboard motor is running, the same with the port motor.
The light never flashed previously.
Any ideas why this is so, or if it is doing any harm to run it like this?
Thanks in advance for any input.