According to the manual, Error 1 is primarily display related. I would check connections at (to) the display board,
etc.It can also be the pressure amp on the cam follower assembly. You could try swapping the cam follower assembly with a good one. Because the error is coming up after a while, that's what I would do first. Is the cam follower assembly in good shape, I wonder (clean,
etc.)?
No need to worry the Bank Manager ... we have plenty of spares for these pumps, and do a lot of work (on older stuff like this) for vets. Send it in to us if you get stuck.
