Gree FGR20/BNa-M Service Manual page 36

Note:
a. During quiet function, fan speed is un-adjustable.
b. When turning on auto quiet function, the unit will enter quiet running state according to temperature
difference between room temperature and setting temperature. In this case, fan speed is adjustable. If
temperature difference between room temperature and setting temperature ≥ 4°C, fan will keep its current speed;
if 2°C ≤ temperature difference ≤ 3°C; fan speed will be reduced by one grade, but if it is at minimun. grade, it
is un-adjustable.; if temperature difference ≤ 1°C, fan speed will be at minimun grade.
c. In auto quiet mode, fan speed can not be raised but reduced. If high fan speed is manually adjusted,
auto quiet mode will quit.
d. There is not auto quiet function in fan or dry mode. Quiet off is default after power failure and then
power recovery.
e. If quite function is set, turbo function will be canceled.
3.4.14 Field Functions
Under off-state of the unit, press Function and Timer buttons continuously for 5s to go to the debugging
menu. Press Mode button to adjust the setting items and ▲ or ▼ button to set the actual value.
3.4.14.1 Ambient Temperature Sensor Setting
In field setting mode, press Mode button to adjust the temperature displayed location displaying 00, and
press ▲ or ▼ button to adjust setting state at timer displayed location. There are 3 types for selection:
Indoor ambient temperature is that at return air inlet (01 is displayed at timer displayed location)
Indoor ambient temperature is that at the place of screen (02 is displayed at timer displayed location)
Return air inlet temperature sensor shall be selected for cooling, dry and fan modes and wired controller
temperature sensor (03 is displayed at timer displayed location) shall be selected for heating and auto modes.
3.4.14.2 Three Grades of Speed for Indoor Fan
In field setting mode, press Mode button to adjust the temperature displayed location displaying 01 and
press ▲ or ▼ button to adjust setting state at timer displayed location. There are 2 types for selection:
3 low grades (LCD displays 01)
3 high grades (LCD displays 02)
Fig. 3.18 Quiet function setting
Duct Type Split Air Conditioner
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