7-2-5. Night operation (sound reduction) Control
Mode name: TCB-PCMO4UL
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 msec.)
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" (1 m) from the front face
of the set and 4.9" (1.5 m) above ground
(in anechoic chambers)
Terminal Input signal Operation
COOL
(SW1)
Night time control
Normal operation
Relative to maximum capacity
SW1: Night time signal switch
71JP805NC
TB1
SW1
COM
HEAT
COOL
Locally procured
Optional PCB
Header outdoor unit
Outdoor unit
interface PCB
Connection
cable
Shield
wire
ON
OFF
ON
OFF
− 72 −
CapacityOutdoor unit
(base unit)
During low noise
mode dB(A) Cooling Heating
072 type 50 Approx. 85% Approx. 80%
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