Toshiba MCY-MUG0401HSW-E Service Manual page 68

Operation
The system is started/stopped from the outdoor unit.
Terminal
ON
COOL
(SW1)
OFF
ON
HEAT
(SW2)
OFF
• Input signal is detected in the rising edge between OFF and ON of SW1/SW2 and the control is accepted in
100 msec from the edge.
• When COOL terminals (SW1 and SW2) are simultaneously turned ON, the control turned ON first is valid, and
the control turned ON later is invalid.
CAUTION
(1) Do not turn on the COOL (SW1) and HEAT (SW2) terminals simultaneously.
(2) COM terminals have DC12 V output with a basic insulation. Use a switch, such as a relay or photocoupler, insulated
from a controller (locally procured) for CO (Change-Over) contact or NO (normally-open) contact.
DC12 V has a current-limiting resistor of 3.3kΩ.
For non-voltage contacts, use a relay with minimum applicable load of DC12V,3mA or less.
7-2-3-7. Night operation (sound reduction) Control
Outdoor unit
Outdoor unit
interface PCB
SW1: Night time signal switch
Operation
This function decreases noise at night or other times as necessary.
Terminal
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.)
Change the outdoor DN code (O.DN [027]) to set the night operation sound.
The system's capacity is reduced during low-noise operation.
The table below provides a rough guide to this capacity reduction.
Input signal
It does not matter whether the state is ON or
100ms
OFF after 100 msec from the signal input.
Batch-
operation
accepted
Batch-operation
Connection
cable
CN508
Input signal Operation
Night time control
Normal operation
100ms
Batch-
stop
accepted
Batch-stop
Optional PCB
TB1
COM
COOL
PJ17
HEAT
67
Operation
Turns on all indoor units
Turns off all indoor units
Locally procured
SW1
Shield
wire