Kindly correct this sentence (It's very urgent)

[JRD]

Kindly correct the following sentence

"He doesn't want to hear any sound from the laundry
room while working the units

Or
(He doesn't want to hear any sound from the laundry
room while the units are working

[Shad]

Both have different meanings. It seems something is wrong in first one.

[mykwyner]

Sentence 2 sounds fine and makes sense in its own context. Sentence 1 only makes sense if "he" is performing an action called "working the units."