? Hi Alex,

Thanks for the details. I hope the cap replacement fixes your issue. Hopefully you have replacement for both of them. If not look for one with a popped end. If no visual evidence, I would replace CA first as that is the start capacitor. It should be the larger in value, assuming they are not same. If they are same value, you will need to beep their connections relative to the wiring diagram to find out which is CA and CB. Would be nice if they are labeled. Good luck.

Imran Malik

On Jan 30, 2024, at 12:10?PM, alex moore <alexmoore4@...> wrote:

?

Thanks Imran, it’s difficult to describe the symptoms as initially there was a grunting straining ?sound that seemed like a braking hum and it tripped the rcd. I turned it on again, the saw started, then the stop switch failed to operate instantly, then when it did the motor stopped quite violently but the braking didn’t switch itself off, it tripped the rcd. Now none of the motors run, I just get a laboured hum. I’ll get the capacitor replaced and see what happens. Many thanks

Alex

On 30 Jan 2024, at 15:13, imranindiana <imranindiana@...> wrote:

?

Alex,

Sure, from your original post, I thought you were having braking issue, i.e. RCD trip at turn off during braking. But if the motors don’t run then replacing caps should help. Once motors are running and the RCD trips during braking we can look into it.

Imran Malik

On Jan 30, 2024, at 10:02?AM, alex moore <alexmoore4@...> wrote:

?

Hi Imran,?

I have another couple of diagrams which maybe could help. I didn’t send them as didn’t want to complicate. ?The machine was manufactured in 1999. The motors do not run, just lots of hum before the rcd trips. I’m just going to fit the new capacitor . Cheers?

Alex

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On 30 Jan 2024, at 14:51, imranindiana <imranindiana@...> wrote:

?

Hi Alex,

Correct, this schematic is for 2KW but for one w/o brake function. If the motors are starting up and running normally then capacitors are good.

My schematic has a date (bottom left) 15.09.1994. I cannot read the date on your schematic but I assume it is older because your machine does not show the low voltage transformer. So all switches are 220VAC vs ~24VAC in newer machines including the schematic I have dated 1994.

If you machine has/had braking function then the schematic is not correct. I was fine for capacitors purpose. You should request a sch for your machine with brake function.

Imran Malik

On Jan 30, 2024, at 9:24?AM, alex moore <alexmoore4@...> wrote:

?

?

Hi Imran,?

I’ve managed to find the big book, but it’s only a spare parts book. However a capacitor replacement a while back (just one replaced) instigated a request for the wiring diagram from felder for this 2kw machine : ?I will replace the other capacitor which I have to see if that rectifies the problem when I get time and see where we go from there.?

Thanks?

Alex

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On 28 Jan 2024, at 14:46, imranindiana <imranindiana@...> wrote:

? No Worries Alex. Is your machine ~5KW? If so, I see Y-D start which adds more relays; K4 is one of them. There is no K4 in the first schematic I shared which was for a 2KW machine.

Do you have the big book of your machine? The schematics and other important info is in there. Here are couple of shots to show you what is in the book that I have.

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If you do not have the machine book with wiring diagram info as shown above, I suggest you contact Felder and get a copy. They may be able to guide you as well as to the location of the relays.

The pics you shared are not very sharp. Appears there is at least one more relay by the selector switch. Still it would be difficult to guide you because I do not know where these are located and for that matter if my schematic matches your machine in the first place.

Once you have the wiring diagram and you poke around a bit more to try to locate components, I can try to help.

Imran Malik

On Jan 28, 2024, at 4:48?AM, alex moore <alexmoore4@...> wrote:

? Hi Imran,?

Sorry for the late response, just found your message in my junk ! Thanks for the wiring diagram , most useful as I seem to have misplaced mine. Looking on the circuit board, I could only find K1 and K4 and the other connecting block visible from the top where the capacitors feed into. There is nothing on the circuit board where the K2 and K3 markings are. Do you know if the circuit board is serviceable or do I replace the whole unit ??

Thanks?
Alex

On 23 Jan 2024, at 23:50, imranindiana <imranindiana@...> wrote:

? Hi Alex,

Yes, a wiring diagram. Sharing what I have but you should have a copy of yours. Now a days, it is placed in a pouch on the inside face of the electrical cabinet cover but not sure what they did back then.

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<image1.jpeg>

Imran Malik

On Jan 23, 2024, at 5:59?PM, alexmoore4@... wrote:

?Hello Imran,
thanks for your kind response. ?I’ll have a look for those components you mention tomorrow. I’m not an electrician, although my brother is and if I can make it easier for him, all the better. I’m guessing a schematic is a wiring diagram ?
Many thanks?
Alex