54
7-2-5. Night operation (sound reduction) control
Operation
This function decreases noise at night or other times as necessary.
The input signal is recognized during its rising/falling phase.
(After reaching the top/bottom of the rising/falling edge, the signal must remain there for at least 100 ms.)
The optional P.C. board should be connected to the header outdoor unit (U1).
The system's capacity is reduced during low-noise operation.
The table below provides a rough guide to this capacity reduction.
* Position of noise measuring device: 3.3 ft (1 m) from the front face of the set and 4.9 ft (1.5 m) above ground
(anechoic sound)
Terminal Input signal Operation
COOL
(SW1)
Night time control
Normal operation
Outdoor unit
(base unit)
During low-noise mode*
dB(A)
Capacity
Relative to maximum capacity
Cooling Heating
Model 072 type 50 approx. 85% approx. 80%
Model 096 type 53 approx. 85% approx. 85%
Model 114 type 53 approx. 80% approx. 80%
Header outdoor unit
Locally procured
Outdoor unit
interface PCB
Shield
wire
Optional PCB
Connection
cable
SW1: Night time signal switch
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