Vitocal 222-G Type 221.A10 Need spare part details

[ned_sl]

Good day Sir, Last 2 years I haven't problem with my Vitocal 222-G, but now I need your expert assitance. One part of my pump is foult and can be replace, but I don't know the parameters of this part. It is VARISTOR. I can send some pictires, where is located. Thank you in advance. Best regards. Ned, ned_sl@abv.bg

[qwert089]

@divanc in an other thread you talked about this Varistor.

do you know the specification?

https://www.viessmann-community.com/t5/Waermepumpe-Hybridsysteme/AVI-Leiterplatte-nur-rote-LED-leuch...

Thx.

[divanc]

Hallo @qwert089 

Foto der Varistormarkierungen.

https://www.tdk-electronics.tdk.com/en/529980/products/product-catalog/protection-devices/voltage-pr...

VG

 

[divanc]

Hallo

Der Varistor schützt den Stromkreis vor Überspannung, und ich hoffe, dass darüber hinaus nicht noch irgendein anderes Element im Stromkreis defekt ist, denn offensichtlich lag am Eingang eine Überspannung vor.
Es ist jedoch erforderlich, die Sicherung F3 in diesem Stromkreis anstelle von T6,3A durch T2,0A zu ersetzen.

 

VG

[qwert089]

https://product.tdk.com/system/files/dam/doc/product/protection/voltage/thermofuse-varistor/data_she...

@ned_sl 

[ned_sl]

Thank you very much indeed for support. I had a chance to identify the varistor, it is S20K300. Best regards. Ned