Troubleshooting Loxone shading actuator air

[Francesc V.]

Hi:

This is the second time, an actuator from household blown up.
This time, I will try at least to repair it and save about 200€.

I see the following. Did an schematic for a better understanding.

- 2A SMD fuse blown. Replaced it with a "non SMD".
- Varistor (S10K300) seems ok. Measures open circuit.....but it's not blue anymore. I will change it.
- 2220 SMD Capacitor blown.

Which capacitance value would you suggest in parallel with the varistor?. I've ordered 470nF 500V in the meantime.

[sam_sam_sam]

Re: Troubleshooting Loxone shading actuator air

What is the part number of the surface mount ic chip

[Francesc V.]

Re: Troubleshooting Loxone shading actuator air

The 10 pin SMD IC chip is a VIPER06X

[CapLeaker]

Re: Troubleshooting Loxone shading actuator air

I’d go at least 630V or and something either 0.033uF or 0.047uF for a Viper in a buck design.

[Francesc V.]

Re: Troubleshooting Loxone shading actuator air

Thanks you all for the feedback. I will get 33nF 1kV for this capacitor. I'll let you know the outcome.

[sam_sam_sam]

Re: Troubleshooting Loxone shading actuator air

If when you replace the capacitor and it still does not work correctly
Replace this VIPER06X ic chip as well

[CapLeaker]

Re: Troubleshooting Loxone shading actuator air

Thanks you all for the feedback. I will get 33nF 1kV for this capacitor. I'll let you know the outcome.

good choice. Also consider Sam's post. The vipers can go wonky.

[Francesc V.]

Re: Troubleshooting Loxone shading actuator air

Material has arrived and it worked perfectly. Just capacitor replacement (used 33nF 1kV) has been necessary.

I keep the VIPER and the varistors for next repairs........

The shading actuator is back to life.

Thanks for your support and guidance, guys.
Francesc.

[CapLeaker]

Re: Troubleshooting Loxone shading actuator air

Awesome!

[Francesc V.]

Re: Troubleshooting Loxone shading actuator air

I decided to try to repair the first actuator that blow up. And I succeed. So now I will have 1 spare waiting for the next one to crash. It's a matter of time :-)

This one had more or less the same damage than previous one (2A Fuse, Big capacitor, and 5.6V Zener diode).

It's important to mention that between big cap terminals you must read about 5M ohm resistance. In this one I was reading a few K........and it was because the Zener was damaged.

I just leave it here in case someone needs to repair same shitty actuator.



Regards,
Francesc.