Carrier 40QSM009DS Service Manual page 15

2.3.2 Cassette Unit
2.3.2.1 Lower Noise

Optimize air channel system design to ensure the maximum quietness and comfort.

Noise max down 6dB.
2.3.2.2 Turbo Mode (Optional)

Turbo function can boost cooling or heating speed in a short period, and makes the room cool
down or heat up rapidly.
2.3.2.3 Fire-proof Controller Box

Electrical control box adopts new design, which can meet higher fire safety requirements.
2.3.2.4 Fresh Air

Fresh air intake function bring you fresh and comfortable air feeling.
2.3.2.5 Wired Controller (Optional)

Compared with infrared remote controller, wired controller can be fixed on the wall and avoid
mislaying. It's mainly used for commercial zone and makes air conditioner control more
convenient.
Old
Common vs. Turbo
Cold
Turbo Mode (After 30 min)
New
New
Hot
Old
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