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Mitsubishi electric PURY-EP300YHM-A Fuse F4

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Hello there,

I have a problem with a pury-300. Fuse was blown on the noise filter board F4. I was informed by the Mitsubishi that this fuse supplied the M-Net board. After removing the board and seeing that there was a big flash burn behind the capacitor we decided it was a problem with the M-Net board. It has taken about 3 weeks for delivery of the new board. I replaced the fuse and board today only to turn it on and the fuse to blow straight awy. This also knocks out the 20A fuse on the distribution board supplying power to L2.

Any Ideas?

Thanks in advance

:)

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