I come to this forum much as a player, we have one of these FT02 for over a year, no malfunctions to date.
We quite satisfied sum compared to our former reflow oven (Netherlands).
By reading this post, I contacted CIF last week, they replied that they were sorry for the mistake on the circuit, they offered me to replace my control card by another modified.
So I returned them the PCB and expects in return a PCB with insulation changed.
by the way, on my oven all the connections was OK

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I will notify you upon receipt of the new card.