I installed the digital preinfusion kit about 6 weeks ago with no issues. Today my Londinium R has started tripping my GFCI outlet within a few seconds of being turned on. The white light turns on right away but it trips the GFCI before the red light turns on. I looked inside and saw no loose wires or moisture. Otherwise I'm not sure how to go about diagnosing the problem.
I have tried running other appliances on the GFCI outlet with no issues, so I'm pretty sure the problem is inside the LR.
thanks for posting. things that have caused this in the past are (i) the Mater pressure switch (which you no longer have) and (ii) cracked or chipped ceramic insulators around the immersion element resulting in current leakage, although you report that it is tripping before the red light illuminates, but not by much im guessing?
perhaps start by sending me some well lit images of the insulators on the exposed end of your immersion element?
they look to be in extremely good condition to me.
perhaps lift the lid on the Sirai pressure switch and if the screws in the middle contact pair were not removed at the factory check that one of them has not rattled loose and dropped into the body of the switch as i have seen that happen before; it will have spot welded itself in place if that is the cause
***be sure to have unplugged the machine from the electrical supply before taking the lid off the Siari as this is switching the full current drawn by the element***
I tripped the breaker a couple of more times by turning the machine on, but after doing that there was no noticeable warmth behind the on/off switch. To my untrained eye everything appears normal there.