SiEN18-622 Field Setting
Test Operation 163
3.2.2 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 outdoor unit external
control adapter (optional), you can lower operating noise by 2-3 dB.
When the low noise operation is carried out automatically at night (The external control
adapter 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 nighttime 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 nighttime 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 nighttime 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 will be put into normal operation mode even during nighttime.)
Image of operation
Operation sound
Time set with “Night-time low noise start setting” Time set with “Night-time low noise end setting”
Night time
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”.)
If capacity precedence isset in “C
apacity
precedence setting”, the fan speed will be
increased according to the load of air
conditioning when load is heavier
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
of mode 1
Operation sound
of mode 2
Operation sound
of mode 3
Rated oper
ation
sound
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