Daikin VRV IV-S RXTQ-TAVJU Series, Service Manual

Page: 122 / 272

Field Setting from Outdoor Unit SiUS331604E
109 Field Setting
3.6 Setting of Low Noise Operation and Demand Operation
Setting of Low Noise Operation
By connecting the external contact input to the low noise input of the external control adaptor for outdoor unit
(optional), you can lower operating noise by 2-3 dB.
When the low noise operation is automatically carried out at night (The external control adaptor for
outdoor unit is not required)
1. While in setting mode 2, select the setting condition (i.e., Mode 1, Mode 2, or Mode 3) for set item No. 22
(Setting of night-time low noise level).
2. If necessary, while in setting mode 2, select the setting condition (i.e., 20:00, 22:00, or 24:00) for set item No.
26 (Setting of start time of night-time low noise operation).
(Use the start time as a guide since it is estimated according to outdoor temperatures.)
3. If necessary, while in setting mode 2, select the setting condition (i.e., 06:00, 07:00, or 08:00) for set item No.
27 (Setting of end time of night-time low noise operation).
(Use the end time as a guide since it is estimated according to outdoor temperatures.)
4. If necessary, while in setting mode 2, set the setting condition for set item No. 29 (Setting of capacity
precedence) to ON.
(If the condition is set to ON, when the air-conditioning load reaches a high level, the system enters to normal
operation mode even during nighttime.)
Image of operation
Operation sound
Rated operation
sound
Operation sound
of mode 1
Operation sound
of mode 2
Operation sound
of mode 3
Time set with night-time low noise start setting
If capacity precedence is set in capacity
precedence setting, the fan speed will be
increased according to the load of air
conditioning when load is heavier.
Night time
Time set with night-time low noise end setting
Operation sound during
night-time low noise mode
is instructed can be set with
night-time low noise level
setting.
(Factory setting is OFF.)
Operation sound level set with
night-time low noise setting
Set with night-time low noise start setting.
(Factory setting is PM 10:00.)
Set with night-time low noise end setting.
(Factory setting is AM 8:00.)