Mitsubishi Electric PUHY-P168, Service Handbook

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[
II
Restrictions ]
(2) Power supply switch connector connection on the outdoor unit
(Factory setting: The male power supply switch connector is connected to CN41.)
*1 The need for a power supply unit for transmission lines depends on the system configuration.
*2 When connecting a system controller to the transmission line for centralized control or performing a group operation
of units in different refrigerant systems, the replacement of male power supply switch connector (CN41) must be
performed only on one of the outdoor units in the system.
(3) Settings for the centralized control switch for the outdoor unit (Factory setting: SW2-1 are set to OFF.)
(4) Indoor unit port switch setting (R2 series (factory setting: "0" ))
Make the setting for the port switch that corresponds to the connected BC (main/sub) controllers.
When more than two ports are used, make the setting on the port with a smaller port number.
The total capacity and the number of connectable indoor units per port is 54 and below, and 3 respectively.
(5) Selecting the position of temperature detection for the indoor unit (Factory setting: SW1-1 set to "OFF".)
1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
Œ
Some models of remote controllers are not equipped with a built-in temperature sensor.
Use the built-in temperature sensor on the indoor unit instead.
ΠWhen using the built-in sensor on the remote controller, install the remote controller where room temperature can be
detected.
(Note) Factory setting for SW1-1 on the indoor unit of the All-Fresh Models is ON.
2) When an optional temperature sensor is used, set SW1-1 to OFF, and set SW3-8 to ON.
Œ
When using an optional temperature sensor, install it where room temperature can be detected.
System configura-
tion Connection to the
system controller Power supply unit for
transmission lines Group operation of
units in a system with
multiple outdoor units Power supply switch con-
nector connection
System with one
outdoor unit _ _ _ Leave CN41 as it is
(Factory setting)
System with multi-
ple outdoor units Not connected _ Not grouped
Grouped Disconnect the male con-
nector from the female
power supply switch con-
nector (CN41) and con-
nect it to the female power
supply switch connector
(CN40) on only one of the
outdoor units.
*3
*Connect the S (shielded)
terminal on the terminal
block (TB7) on the out-
door unit whose CN41
was replaced with CN40
to the ground terminal
( ) on the electric box.
With connection to
the indoor unit sys-
tem Not required Grouped/not grouped
With connection to
the centralized con-
trol system Not required
*2
(Powered from the
outdoor unit)
Grouped/not grouped
Required Grouped/not grouped Leave CN41 as it is
(Factory setting)
System configuration Centralized control switch settings (SW2-1)
Connection to the system controller Not connected Leave it to OFF. (Factory setting)
Connection to the system controller Connected
*1
*1. When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
ON