Άναψε ο ανιχνευτής καπνού, με αποτέλεσμα να ελέγξει ο υπεύθυνος ορόφου.

Άναψε is the aorist form of ανάβω.

Its basic literal meaning is lit up or turned on, but with something like ο ανιχνευτής καπνού it is understood as activated or went off.

So here it does not mean someone physically lit the detector. It means the detector became active.

Greek word order is much more flexible than English word order.

So both of these are possible:

• Άναψε ο ανιχνευτής καπνού
• Ο ανιχνευτής καπνού άναψε

Starting with the verb is very common in narration and often gives a more event-focused feel, like The smoke detector went off...

The subject is still clear because ο ανιχνευτής is in the nominative form and has the article ο.

καπνού is in the genitive case, and this is a very common Greek way to express a noun modifying another noun.

So:

• ανιχνευτής καπνού = detector of smoke = smoke detector

This is similar to how Greek often builds expressions like:

• ποτήρι νερού = glass of water
• μυρωδιά καπνού = smell of smoke

So καπνού tells you what kind of detector it is.

This is a set expression meaning something like:

• with the result that
• resulting in
• so that, as a result

It introduces the consequence of the first action.

So the structure is:

• event 1 happened
• με αποτέλεσμα να...
• result/consequence followed

This expression is quite common in written or slightly more formal Greek.

Because after να, Greek uses the subjunctive, not the normal past indicative.

So:

• έλεγξε = aorist indicative, he/she checked
• να ελέγξει = aorist subjunctive, to check / for him-her to check

After με αποτέλεσμα να, Greek needs the να + subjunctive pattern.

That is why ελέγξει appears here.

This is a question of aspect.

• να ελέγξει = aorist subjunctive
  It presents the action as one complete event.

• να ελέγχει = present subjunctive
  It suggests ongoing, repeated, or habitual checking.

In this sentence, the idea is that the detector went off and, as a result, the floor supervisor performed one specific checking action. That is why να ελέγξει is the natural choice.

The subject is ο υπεύθυνος ορόφου.

Greek often puts the subject after the verb, especially in clauses with να.

So the structure is:

• να ελέγξει = to check
• ο υπεύθυνος ορόφου = the floor supervisor

In other words, the floor supervisor is the person doing the checking.

Because ορόφου is being used in a compact, title-like genitive phrase.

So:

• ο υπεύθυνος ορόφου = floor supervisor / person in charge of a floor

This kind of structure is common in Greek when the second noun works almost like a label.

You could also say:

• ο υπεύθυνος του ορόφου

That version sounds more explicitly like the person responsible for the floor, with a stronger sense of a specific floor already known in context.

So:

• ο υπεύθυνος ορόφου = more compact, title-like
• ο υπεύθυνος του ορόφου = more explicitly definite

Possibly, yes.

The verb ελέγχω often takes an object, because in English and Greek you usually check something.

So on its own, να ελέγξει ο υπεύθυνος ορόφου can feel slightly abbreviated. The omitted object might be understood from context, such as:

• τον χώρο = the area
• τι συνέβη = what happened
• την αιτία = the cause

A fuller version could be something like:

• ...με αποτέλεσμα να ελέγξει ο υπεύθυνος ορόφου τον χώρο.
• ...με αποτέλεσμα να ελέγξει ο υπεύθυνος ορόφου τι συνέβη.

So the original sentence is understandable, but it relies on context.

Yes, somewhat.

The phrase με αποτέλεσμα να gives the sentence a slightly formal, report-like, or written tone.

In everyday speech, people might more naturally say something like:

• Άναψε ο ανιχνευτής καπνού, οπότε ο υπεύθυνος ορόφου πήγε να ελέγξει.
• Άναψε ο ανιχνευτής καπνού, κι έτσι ο υπεύθυνος ορόφου πήγε να ελέγξει.

So the original is fine, but it sounds a bit more formal than the most conversational alternative.