Multiplus 12/3000. was working since installation 3-4 months ago. yesterday, tried to turn inverter on from Venus remote console via wifi from iPhone (always worked before). Inverter won't come on. batteries are chagrged, good voltage at inverter, charger works fine in charger only mode when powered by our Honda 2000 generator, but inverter won't turn on now (physical switch on multiplus is in the ON position, just as always.
I can turn it OFF and to Charger Only, but it won't come on to invert. I used to hear a click when switching from charger only to ON, but now no click.
This unit has worked since installation, nothing changed, no nearby lighting or other external influences. It just decided yesterday not to turn the inverter on.
If I have the generator running and try to switch from "charger only" to ON, it looks like it shows "Inverting" for a second, then goes back to charger only on its own.
Other components in the system are a Smartsolar 150/85, a Venus controller, and a BMV-712, all of which seem to be working fine.
I have not changed any settings or done any firmware upgrades.
Any ideas or suggestions on troubleshooting? We are at anchor, under Covid-19 lockdown in Grenada. I have MK-3, voltmeter, etc.