Fortis over voltage protection

Pauldub · 19-10-2025 12:00PM #1

hi All. Anyone any experience with fortis over voltage. I’ve attached pictures of the wiring. Can’t seem to get it to come to life. Thanks

IMG_3042.jpeg

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10-10-20 · 19-10-2025 12:30PM

Nope, but that looks dangerous as hell. 😣

The dump resistor must be external, is it still functioning (possibly 24 ohms)?

From reading about these, if the system wasn't brought up in a specific manner (bottom of page 17 below) then it can cause damage to the controller.

This manual appears to be for a later version of the same controller (dated 2002) so yours must be earlier?

https://cdn.contentspeed.ro/pimromstal.websales.ro/cs-content/cs-docs/products/35fv1158manualtehnicinstalorig_41833_10_1676700922.pdf

Pauldub · 19-10-2025 03:02PM

hi thanks for that. The dump resistor is seperate to what can be seen in the box. Not sure about it myself. Has. SMA overviltage protection box, which now seems to. Be faulty. Thanks for your inout

10-10-20 · 19-10-2025 05:10PM

https://www.boards.ie/discussion/comment/123918545#Comment_123918545

I'd only be guessing, but it's always worth checking the continuity of all components and switches with a DVM in any case. Sometimes it can be a burned out contact. Just make sure that it's isolated first.

Fortis over voltage protection

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