At 09:54 AM 10/28/2012, you wrote:
My Expobar office lever also trips my ground fault, usually after 20 seconds. Is there any way to tell whether an element problem versus the control board?
Pull the wires off the heating element and arrange so they can't short. Then plug it in and see if the problem is gone. If so, it's the heating element, if not, put them back and try something else.
Alternatively, turn on the machine and connect a good ohm meter between the ground pin and the skinny pin on the power cord. If it indicates resistance then start pulling wires till it doesn't and you'll find the problem. My Fluke 189 has no problem doing this, but sometimes the resistance is so high that inexpensive meters don't see it.
Ira
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