Night-Time Low Noise Operation And Demand Operation - Daikin REYQ-XA Service Manual

SiUS371901E
2.7

Night-Time Low Noise Operation and Demand Operation

2.7.1 Night-Time Low Noise Operation
By connecting the external contact input to the low noise input of the outdoor unit external control adaptor
(optional), you can lower operating noise.
Setting
Level 1
Level 2
Level 3
A. When night-time low noise operation is carried out by external contact (with the use of the external
control adaptor for outdoor unit)
1. Connect external control adaptor for outdoor unit and short circuit terminal of night-time low noise operation
(Refer below figure).
If carrying out demand or low noise input, connect the adaptor's terminals as shown below.
2. While in setting mode 2, set the item 2-12 (External low noise or demand setting) to ON.
3. If necessary, while in setting mode 2, select an external low noise level for the item 2-25.
4. If necessary, while in setting mode 2, set the item 2-29 (Capacity priority setting) to ON.
(If the condition is set to ON, when the air conditioning load reaches a high level, the low noise operation
command will be ignored to put the system into normal operation mode.)
B. When night-time low noise operation is carried out automatically (External control adaptor for
outdoor unit is not required)
1. While in setting mode 2, select a night-time low noise operation level for the item 2-22.
2. If necessary, while in setting mode 2, select a starting time of night-time low noise operation (i.e., 8:00 PM,
10:00 PM, or 12:00 AM) for the item 2-26.
(Use the starting time as a guide since it is estimated according to outdoor temperatures.)
3. If necessary, while in setting mode 2, select an ending time of night-time low noise operation (i.e., 6:00 AM,
7:00 AM, or 8:00 AM) for the item 2-27.
(Use the ending time as a guide since it is estimated according to outdoor air temperatures.)
4. If necessary, while in setting mode 2, set the item 2-29 (Capacity priority setting) 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 night-time.)
Field Settings and Test Operation
Content
Set the outdoor fan to Step 6 or lower.
Set the outdoor fan to Step 5 or lower.
Set the outdoor fan to Step 4 or lower.
F1 F1
X
F2 F2
X
P3 P3
X
P4 P4 X
External control Demand
adaptor for
1 2
outdoor unit
X X
Host computer
monitor panel
or demand
controller
Low
noise
3 C
X X X X
Outdoor wiring indicated
by dotted line
Field Settings for Outdoor Unit
218