- 20 -
System
Configuration
Single refrigerant
system
_
_
_
_
Multiple refrigerant
system
Connection with
the system
controller
Power supply unit
for the
transmission lines
Unnecessary
Unnecessary (Note2)
(Supplied from the
outdoor unit)
Applicable
Grouping operation
of different
refrigerant systems
n/a
applicable
applicable // n/a
applicable // n/a
applicable // n/a
The setting of the power supply
selecting connector
Use CN41 as is (Factory setting)
Replace the CN41 with CN40 on
only one of the outdoor units.
✻
Connect the S terminal of the TB7
(terminal block on the outdoor
unit) on the outdoor unit whose
CN41 was replaced with CN40 to
the earth terminal of the electric
box.
Use CN41 as is (Factory setting)
n/a
Connected with the
indoor units
Connected with the
centralized system
Notes:
1. Will limit the total connectable units in the refrigerant system.
2. The need for a power supply unit for the transmission lines depends on the system configuration. Refer to “ DATA BOOK ” for
more details.
Setting the power supply selecting connector for the outdoor unit (Factory setting: CN41 is connected.)
(2)
System configuration
Setting of the centralized controller switch (SW 2-1)
Connection system with the system controller
n/a
Leave it to OFF. (Factory setting)
Connection system with the system controller
applicable (Note 1)
ON
Note:
1. When connecting only the LM adapter, leave SW2-1 to OFF.
Note:
1. Refer to section “ 7 [2] 13. Demand control ” for detailed information on demand control settings.
Setting the centralized control switch on the outdoor unit (factory setting: SW2-1 OFF )
(3)
Category
Output
Input
Usage
Cooling operation is disabled (thermo OFF) by the external
input to the outdoor units.
✻
Can be used as an on-demand control for each refrigerant
system.
Quiet operation of outdoor units is run with an external input to
the outdoor units.
(Night mode can be run under the following conditions: Outdoor
air temperature below 30˚C when running a cooling operation
and above 3˚C when running a heating operation.)
Forces the outdoor units to run a fan operation by receiving the
snow signal from the snow sensor.
The operation mode can be switched between cooling and
heating with an external input to the outdoor units.
Outdoor units’ signal output
✻
Can be used as a device that displays the operation status
✻
Can run an interlocking control operation with external devices
Function
Demand (level)
Night mode or Demand
(Level)
✻
Note1
Snow sensor
Signal input (level)
You can switch the operation mode between cooling and
heating by input from the outside to the outdoor unit.
Auto-changeover
Compressor in operation
Abnormal operation status
CN3S
CN3N
CN3D
CN51
Terminal to be used
Various types of control using the connectors on the outdoor unit for input-output signal
(various types of connections with optional parts)
(4)
