Night Operation (Sound Reduction) Control - Toshiba MCY-MHP0404HT-C Service Manual

7-3-6. Night operation (sound reduction) control

Outdoor unit
SW1: Night time signal switch
Operation
This function decreases noise at night or other times as necessary.
Terminal Input signal
ON
OFF
COOL
(SW1)
ON
OFF
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 system's capacity is reduced during low-noise operation.
The table below provides a rough guide to this capacity reduction.
During low-noise mode* dB(A)
Outdoor unit
(base unit)
Cooling
Model 0404
Model 0504
Model 0604
* Position of noise measuring device: 1 m from the front face of the set and 1.5 m above ground (anechoic sound)
Connection
Outdoor unit
cable
interface PCB
C N 5 0 8
Operation
Night time control
Normal operation
Heating
47 50
47 50
50 50
Locally procured
Optional PCB
TB1
COM
P J 1 7 COOL
HEAT
Shield
wire
Capacity
Cooling Heating
approx. 85 % approx. 95 %
approx. 80 % approx. 80 %
approx. 80 % approx. 70 %
43
59
SW1
Relative to maximum capacity