I have a problem with my Multiplus 24/3000/70 installed in a bus.
It began with the inverter not starting. Whenever i try to start the inverter nothing happens.
The charger was still working at this point but stopped working the following day.
When I connect AC to the unit the unit starts up and opens up for AC distribution, so with shore power connected the mains are on and the "mains on" LED is lit.
According to the LEDs the charger is also working. It follows the steps "bulk", "absorption" and then settles at "float" but the acctual voltage on the batteries are falling during the charging cycle. So the unit seems to beleive it is charging the batteries whilst the acctual voltage on the batteries are declining.
Does anyone know what may be the source if this behaviour? I am considering connecting the unit to a laptop to try a reset and firmware update. Does this sound like a plausible solution? Has anyone in here experienced similar behaviour and have an estimate of potential repair cost?
Thanks in advance.