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#1 |
Badcaps Veteran
Join Date: Mar 2010
City & State: UK
My Country: UK
I'm a: Hobbyist Tech
Posts: 723
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![]() Odd problem here with this oven. Once it's been heating for about 10 minutes the RCD trips. If you try and flip the RCD back on it will trip instantly until the oven has cooled down again.
It's previously eaten an element so I replaced the element again - fault remains. My next thought was possibly the cooling fan, as the mainboard's cooling fan kicks in after about 10 minutes usually, but the resistance is testing OK. There's some quite badly melted plastic around the earth connection at the back of the oven, but I'm not sure if this damage was caused by the fault or if it occurred at a previous time. Despite the melted plastic the connections seem to be electrically sound. Any ideas? E: Also worth noting it smells like burning plastic whenever used, but the melted terminal block doesn't seem to be heating up.
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#2 |
Badcaps Veteran
Join Date: Mar 2010
City & State: UK
My Country: UK
I'm a: Hobbyist Tech
Posts: 723
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![]() Think I've figured it out, it was the terminal block after all - opened the rear cover and it's a complete mess of melted wires and plastic. I think there was some arcing going on between the live terminal and the chassis. Going to replace the terminal block, should hopefully fix it.
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#3 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,106
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![]() maybe use a ceramic terminal block
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#4 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,753
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![]() If that doesn't fix it, it is likely the internal heat element wire shorting to the elements ground when it heats up
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