Mitsubishi Electric PUHY-P200 Service Handbook page 22

(2) Setting the power supply selecting connector for the outdoor unit (Factory setting: CN41 is connected.)
System Connection with
Configuration the system
controller
Single refrigerant
system
Connected with the
Multiple refrigerant
indoor units
system
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.
(3) Setting the centralized control switch on the outdoor unit (factory setting: SW2-1 OFF )
System configuration
Connection system with the system controller n/a
Connection system with the system controller applicable (Note 1)
Note:
1. When connecting only the LM adapter, leave SW2-1 to OFF.
(4) Various types of control using the connectors on the outdoor unit for input-output signal
(various types of connections with optional parts)
Category
Input
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
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.
You can switch the operation mode between cooling and
heating by input from the outside to the outdoor unit.
Outdoor units' signal output
Output
✻
Can be used as a device that displays the operation status
✻
Can run an interlocking control operation with external devices
Note:
1. Refer to section " 7 [2] 12. Demand control " for detailed information on demand control settings.
Power supply unit
for the
transmission lines
_ _
_
n/a
Unnecessary
Unnecessary (Note2)
(Supplied from the
outdoor unit)
Applicable
Usage
30˚C when running a cooling operation
- 20 -
Grouping operation The setting of the power supply
of different selecting connector
refrigerant systems
_
Use CN41 as is (Factory setting)
n/a
Replace the CN41 with CN40 on
applicable
only one of the outdoor units.
✻Connect the S terminal of the TB7
(terminal block on the outdoor
applicable // n/a
unit) on the outdoor unit whose
CN41 was replaced with CN40 to
the earth terminal of the electric
applicable // n/a
box.
applicable // n/a
Use CN41 as is (Factory setting)
Setting of the centralized controller switch (SW 2-1)
Leave it to OFF. (Factory setting)
ON
Function
Demand (level)
Night mode or Demand
✻
(Level) Note1
Snow sensor
Signal input (level)
Auto-changeover
Compressor in operation
Abnormal operation status
Terminal to be used
CN3D
CN3S
CN3N
CN51