Mitsubishi Electric PURY-P72 Service Handbook page 30

[ II Restrictions ]
(2) Power supply switch connector connection on the outdoor unit
(Factory setting: The male power supply switch connector is connected to CN41.)
There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the System Design
Manual for details.
System configura- Connection to
tion the system con-
troller
System with one
outdoor unit
System with multi- Not connected
ple outdoor units
With connection
to the indoor
unit system
With connection
to the central-
ized control sys-
tem
*1 The need for a power supply unit for transmission lines depends on the system configuration.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the
system.
(3) Settings for the centralized control switch for the outdoor unit (Factory setting: SW2-1 are set to OFF.)
System configuration
Connection to the system controller
Connection to the system controller
*1. Set SW2-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2. When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
(4) Selecting the position of temperature detection for the indoor unit (Factory setting: SW1-1 set to "OFF".)
To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor
on the remote controller or an optional thermistor.
1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
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.
When 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.
When using an optional temperature sensor, install it where room temperature can be detected.
HWE0803A
Power supply unit
for transmission
lines
_ _
_
Not required
*1
Not required
(Powered from
the outdoor unit)
Required *1
Not connected
*2
Connected
- 21 -
Group operation Power supply switch connector connection
of units in a sys-
tem with multiple
outdoor units
_ Leave CN41 as it is
(Factory setting)
Not grouped
Grouped Disconnect the male connector from the fe-
male power supply switch connector (CN41)
Grouped/not
and connect it to the female power supply
grouped
switch connector (CN40) on only one of the
outdoor units.
*Connect the S (shielded) terminal on the
Grouped/not
terminal block (TB7) on the outdoor unit
grouped
whose CN41 was replaced with CN40 to
the ground terminal ( ) on the electric box.
Grouped/not Leave CN41 as it is
grouped (Factory setting)
Centralized control switch settings
Leave it to OFF. (Factory setting)
ON
*2
*1
GB