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Servicehandboek 11
Uitsluitend voor intern gebruik
Q701 / Q702 (bij weerstandinstelling op 9 V-meettoestel)
DB701 (bij diode-instelling op 9 V-meettoestel)
5.3.2 Controle op grond van een kortsluiting
Werking van de koelventilator!
Magnetronoven is volgens installatiehandleiding ingebouwd!
Beluchtingssleuven en luchtinlaten zijn vrij!
5.4 Controle van de veiligheidsschakelaar
De veiligheidsschakelaar dient om de opwekking van microgolven bij een open deur te verhinderen.
Hoofdschakelaar
Onderbreekt de 230V wisselstroomtoevoer naar de inverterschakeling.
Kortsluitschakelaar
Als de hoofdschakelaar in gesloten toestand uitvalt (kortsluiting) en de gebruiker de deur opent,
veroorzaakt de controleschakelaar van het 230V voedingsapparaat een kortsluiting. Door de
kortsluiting wordt de 10 A-zekering geactiveerd waarbij de kortgesloten schakelcontacten
samensmelten.
Signaalschakelaar
Meldt de deurpositie (open/gesloten) aan de besturingsmodule.
Controle van de schakelaar
1. Alle leidingen van de drie schakelaars aftrekken.
2. Iedere schakelaar bij open en gesloten deur op doorgang controleren.
Normaal Fout
Voor Terug Voor Terug
E-C > 1k Ω >1k Ω bijna 0 Ω bijna 0 Ω
E-G > 1k Ω >1k Ω bijna 0 Ω bijna 0 Ω
G-C > 1k Ω >1kΩ bijna 0 Ω bijna 0 Ω
Voor Terug
+ – Waarde
~ ~
∞∞
Deur open Deur gesloten
Hoofdschakelaar
Ω open
0 Ω gesloten
Signaalschakelaar
Ω open
0 Ω gesloten
Kortsluitschakelaar
Ω open Ω open
11


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