作動 さどう電圧 でんあつ表示 ひょうじ ではありませんでした
sadōden'atsuhyōjikidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 作動電圧表示器

1. Was not a functional voltage indicator.; Was not an operating voltage display.

Past/Perfective
Negative
Polite
Formal Register
Computing