Night Operation (Sound Reduction) Control - Toshiba MMY-MAP0804HT8-E Service Manual

6-8-5. Night operation (sound reduction) Control

Operation
This function decreases noise at night or other times as necessary.
Terminal
COOL
(SW1)
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.
Outdoor unit
(base unit)
Model 0804
Model 1004
Model 1204
Model 1404
Model 1604
* Position of noise measuring device: 1 m from the front face of the set and 1.5 m above ground (anechoic sound)
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Header outdoor unit
Connection
Outdoor unit
cable
interface PCB
CN508
SW1: Night time signal switch
Input signal Operation
Night time control
ON
OFF
Normal operation
ON
OFF
During low-noise mode*
dB(A)
50
50
50
53
53
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Locally procured
Optional PCB
TB1
COM
PJ17 COOL
HEAT
Shield
wire
Capacity
Cooling Heating
approx. 85% approx. 80%
approx. 70% approx. 65%
approx. 60% approx. 55%
approx. 80% approx. 80%
approx. 70% approx. 70%
113
SW1
Relative to maximum capacity