点検中(てんけんちゅう)

点検中(てんけんちゅう) is composed of 点検(てんけん) (inspection/checking) + 中(ちゅう) (in progress). It appears on signs when equipment, elevators, restrooms, or facilities are temporarily unavailable due to maintenance or inspection.

THE ～中(ちゅう) PATTERN:
The suffix 中(ちゅう) attaches to action nouns to indicate something is currently in progress. Other common examples:

• 清掃中(せいそうちゅう): cleaning in progress
• 工事中(こうじちゅう): under construction
• 故障中(こしょうちゅう): out of order
• 準備中(じゅんびちゅう): in preparation
• 営業中(えいぎょうちゅう): open for business

Common collocations

• 点検中(てんけんちゅう)のため使用(しよう)できません: unavailable due to inspection
• 「点検中(てんけんちゅう)」の表示(ひょうじ): an "under inspection" notice
• 定期(ていき)点検中(てんけんちゅう): undergoing regular inspection