Daikin GYEQ20AN Service Manual page 112

Outdoor Unit Control
When you need to operate the unit at a lower noise level than normal as is the case with
cooling/heating during midnight hours, you can select the "quiet mode" by following the
instructions given below. The quiet mode works by controlling the engine speed and outdoor fan
speed. To enable the quiet mode, use the onboard checker of the main circuit board to
configure the memory switches as described in the table below. You can choose one of the
three operation modes: "normal," "quiet", "super-quiet."
[Note] Cooling/heating performance is reduced when quiet mode or super-quiet mode is set,
[Configuring the quiet/super-quiet mode]
[Normal operation mode]
The unit runs as normal, without entering the quiet or super-quiet mode.
[Quiet mode]
The unit automatically switches between the quiet and normal modes depending on the outdoor
air temperature.
[Cooling]
[Heating]
[Super-quiet mode]
The unit keeps running in the quiet mode, regardless of the outdoor air temperature.
101
(Cooling) (Heating) "Quiet Mode" control function
possibly resulting in "Cannot Get Cool/Warm" complaints from end users.
Memory switch
CH1-No.4
Cooling
CH1-No.5
CH1-No.6
Heating
CH1-No.7
Quiet mode
Normal
operation
mode
Quiet mode
Normal
operation
mode
Quiet mode
Normal
operation
mode
Normal operation mode
OFF
OFF
OFF
OFF
30°C 32°C
Outdoor air temperature
9°C 7°C
Outdoor air temperature
Outdoor air temperature
SiAUY361411EA
Quiet mode Super-quiet mode
ON ON
OFF ON
ON ON
OFF ON
025762-00E
025763-00E
025764-00E
Control and Functionality