PACD011001C2 Test Operation
Test Operation UM Combination “MA1R Series” Using R-407C 469
1.6 Low Noise Operation
By connecting the external contact input to the low noise input of the BMS interface adaptor for outdoor unit
(optional), you can save power and lower operating noise by 2 -3 dB.
Instructions for
Demand Control
Operation
1. Outdoor unit field setting
‹
Setting mode 1: Set low noise operation to “ON.”
‹
Setting mode 2: Match low noise operation and demand control address with address of BMS interface
adaptor for outdoor unit.
2. BMS interface adaptor for outdoor unit setting
‹
Function switch (SS1)
Set to “BOTH” or “DE.”
‹
Address setting switches (DS1, DS2)
Match with outdoor unit low noise operation and demand control address.
3. Short-circuit the low noise input of BMS interface adaptor for outdoor unit.
Low Noise Control
System Example
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