Low Noise Operation - Daikin R407C PLUS Service Manual

Si33-105
1.6

Low Noise Operation

By connecting the external contact input to the low noise input of the outdoor unit external
control adaptor for outdoor unit (optional), you can save power and lower operating noise by 2 -
3 dB.
Instructions for 1. Outdoor unit field setting
&
Demand Control
&
Operation
2. Outdoor unit external control adaptor setting
&
Set to "BOTH" or "DE."
&
Match with outdoor unit low noise operation and demand control address.
3. Short-circuit the low noise input of outdoor unit external control adaptor for outdoor
Low Noise
Control System
Example
Test Operation R407C PLUS Series Heat Recovery System
Setting mode 1: Set low noise operation to "ON."
Setting mode 2: Match low noise operation and demand control address with address of
outdoor unit external control adaptor.
Function switch (SS1)
Address setting switches (DS1, DS2)
unit.
Test Operation
119