Gree FGR20/BNa-M Service Manual page 30

disappear.
Air Exchange setting is shown as in fig.3.12.
Note: In air exchange mode, press Function button or there is not any operation within 5s after the last
button operation, the system will be quit from air exchange setting and current energy-saving data won't be
memorized.
3.4.8 Sleep Setting
Sleep on: Press Function button under on-state of the unit into sleep function and then press Enter/Cancel
button to turn on sleeping function.
Sleep off: During sleep on-state, press Function button to go to the sleep function and then press Enter/
Cancel button to turn off this function.
Sleep setting is shown as Fig3.13.
Fig.3.12 Air exchange device
Duct Type Split Air Conditioner
Service Manual
CONTROL
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