Scarifier YT 6702 MAIN-V1 8437-545204 PCB Issue—Source or Repair Options?

I warmly welcome.

A colleague gave me a YT 6702 veliculator / aerator for repair. The device works for a while and then "rests" for a long time before it can be turned on again. After removing the casing, you can see that the motor (electric 1300W) is protected by some electronic system, marked on the printed circuit board as:

MAIN-V1
8437-545204

The voltage reaches this system, but it does not come out anymore. The engine itself is not hot enough (before it stops running) to require a safe shutdown, it is likely that the above-mentioned system has failed. Anyone have an idea where to get it or maybe someone has already tried to fix this system with success (producer Cast .... Pols .... sp. Zoo)?

Layout photos:




Illustrative photos, not readable, but there are no markings on the elements of the system (except for one resistor and electrolyte)

best regards

romek1960 wrote:

The device works for a while and then "rests" for a long time before it can be turned on again.

It turns off itself after a certain moment of work or does the problem with switching on occur after the device is intentionally turned off with the switch?

romek1960 wrote:

producer Cast .... Pols .... sp. zoo

Maybe Castorama Polska?

romek1960 wrote:

Illustrative photos, not legible

Looks like some kind of soft starter. I would improve the soldering, and if it would not work, I would replace the system with another soft starter.

I warmly welcome.

And so on.

The 'transistor-like' circuit has no markings, so whether it is a transistor or, for example, a thyristor, I have no idea. This is the problem, because if it had a marking, it could be replaced and, possibly, the operating parameters could be checked.

When it turns off - it works for 15-25 minutes and then refuses to cooperate. The current (230V) is reaching the system. I do not see any signs of motor overheating (when the motor windings are disconnected, they are cold). Reactivation possible after approx. 30 minutes and the history with disconnection is repeated.

The soldering is OK - most of the elements are surface soldered, but everything looks fine (I haven't improved the soldering because I rather avoid this type of action with surface soldering). My first suspicion was also on cold February.

I have a telephone information from the manufacturer that they do not provide post-warranty service (or rather it is unprofitable).

The most reasonable proposal at this point seems to be the one that aims to replace the softstarter. It will get the same as in the device rather impossible (except for disassembly). Hence my request, advise you how to choose a replacement and where to get it?

Regards (with the hope of receiving an answer)

PS> I am available on the "electrode" only in the evening hours, so I apologize for the long response to your inquiries.

Problem solved. In place of the possibly damaged system, I inserted the plate from the engine speed regulator (blocking the revs to max). The scarifier works without any problems.

Thanks to everyone for your help.