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Hi, this is on a Revo 3. When I look at the bus devices it says SOLO (v10). The only other device is the Nerd itself. Yes, this has the Shearwater battery box, which I guess contains the SOLO board with a (new) 9V installed.What unit is this on?
DIVCAN on the NERD is only a communication with the other half of the system that drives the solenoid. Not sure what the solenoid driver is. Shearwater makes one that runs on a 9V battery with a 6.5V lower limit (while solenoid is firing). Or this may be connected to whatever rebreather manufacturers solenoid control system you have.
It looks like the NERD is giving a diagnostic message for the unknows other half of the DIVCAN system you have.
I don't know much about the Revo, but that has the Jaksa solenoid with the 2 individual pins to connect to the solenoid control board, right? If so, that's easier pin setup to read than o2ptima
So you connected a 9v to the pins to the solenoid and it fires,
Did you try reading with a DMM to see if it's sending correct voltage from the board when you switch to high SP? It should be 0, then jump up to match the cell voltage when it fires every few seconds.
What happens if you wiggle connections and twist wires? If you can find a wire that when you bend it, it stops or starts sending voltages, then that's your problem. If not, and you have no voltage from the SOLO, then you have some issue with the Solo board.
You have a new 9v, but double check that voltage too incase it's a defective cell. And the connectors are gold plated, but you could clean with a Deoxit and a pipe cleaner--at the Divecan fittings as well as the solenoid--and reassemble with the Dow Corning, to rule out a poor connection.