Toshiba MMY-MUP0721FT6P-UL Service Manual page 106

6-2-3-6. Operation Mode Selection Control
SW1: Cooling mode specified input switch
SW2: Heating mode specified input switch
NOTE
SW1: COOL mode selection switch
SW2: HEAT mode selection switch
Input signal
COOL (SW1) HEAT (SW2)
OFF
ON
OFF
Indoor unit operation intervention function
The statuses of indoor units operating in a mode other the selected operation mode can be switched by setting
the outdoor DN Code of the header outdoor unit.
The optional P.C. board should be connected to the header outdoor unit (U1).
Outdoor DN Code
(O.DN)
Unallowed indoor units in a mode other than the P.C.board selection modes are not treated as priority (thermostat OFF state).
P.C. board
selection mode
Normal
O.DN [008] = 0
(factory default)
Cooling operation
only allowed
Heating operation
only allowed
Only operation modes and air blow operation selected on the P.C.board can be selected on the remote controller.
When the input signal is turned ON, indoor units operated in a mode other than the P.C.board selection mode are forcibly
switched to the P.C.board selection modes.
P.C. board
selection mode
Normal
O.DN [008]= 1
COOL
HEAT
• 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 3.3 k .
• For non-voltage contacts, use a relay with minimum applicable load of DC12V,3mA or less.
Header outdoor unit
Connection
Outdoor unit
cable
interface PCB
CN510
Operation
OFF Normal operation
Only cooling
OFF
operation allowed
Only heating
ON
operation allowed
Input Signal
Remote
COOL HEAT
control
SW1 SW2
or
OFF OFF
or
ON OFF
or
OFF ON
Input Signal
COOL HEAT
SW1 SW2
OFF OFF , ,
• Only
ON OFF
• Indoor units in Heat mode are forcibly switched to the Cool mode.
• Only
OFF ON
• Indoor units in Cool or Dry mode are forcibly switched to the Heat mode.
Locally procured
Optional PCB
TB1
COM
PJ17 COOL
HEAT
Shield
wire
Details of Processing
Follow the remote controller.
Follow the remote controller (Normal cooling operation).
Thermostat OFF (Air blow operation at super-slow blow rate)
Follow the remote controller (Normal air blow operation).
Thermostat OFF (Air blow operation at blow rate set on remote control)
Follow the remote controller (Normal heating operation).
Follow the remote controller (Normal air blow operation).
Remote control
or can be selected.
, or can be selected.
or can be selected.
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SW1
SW2
Operation State
When using the
remote control,
(mode select
control) indicator
is displayed.