MULTI TYPE

6-8-3. Snowfall Fan Control
Header outdoor unit
Outdoor unit
interface PCB
CN509
Connection
cable
Optional PCB
TB1
COM
PJ17 COOL
HEAT
Locally procured
Shield
wire
Snowfall sensor
SW1
Operation
An external snowfall signal turns on the outdoor unit fan.
Terminal Input signal Operation
COOL
(SW1)
SW1: Snowfall detection switch (snowfall sensor)
ON
OFF
ON
OFF
Snowfall fan control
(Turns on outdoor
unit fan)
Normal operation
(Cancels control)
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).
6-8-4. External master ON/OFF Control
Header outdoor unit
Outdoor unit
interface PCB
CN512
SW1: Operation input switch
SW2: Stop input switch
Connection
cable
Operation
The system is started/stopped from the outdoor unit.
Optional PCB
PJ17
COM
COOL
HEAT
TB1
Locally procured
Shield
wire
SW1
SW2
Terminal Input signal Operation
COOL
(SW1)
ON
OFF
Turns on all indoor
units
HEAT
(SW2)
ON
OFF
Turns off all indoor
units
The input signal is recognized during its falling phase. (After reaching the bottom of the falling edge, the signal must
remain there for at least 100 ms.)
CAUTION
(1) Do not turn on the COOL (SW1) and HEAT (SW2) terminals simultaneously.
(2) Be sure to provide a contact for each terminal.
External signal: No-voltage pulse contact
The optional P.C. board should be connected to the header outdoor unit (U1).
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