I have a V 104 error. not stuck or anything like that, just an error. I've checked debug and everything looks good. The valve is physically working and doing so according to the machine. The board has been replaced for the bi bag system and I am still getting the error. I have no idea what else to check.
look inside your acid and bicarb rinse ports and look for an old O-ring stuck in there. after that, go into service mode - calibrate sensors - pressures - calibrate regulator pressure....after that, hit confirm to save( this calibrates your bi bag pressure transducers), shut off machine, unplug machine, plug back in, put machine through a FULL rinse, hit confirm, shut off and then turn back on. The machine should reset its self during the very last second of the rinse cycle.