Mitsubishi Electric PURY-P72 Service Handbook page 31

[II Restrictions
1
(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
Power supply unit Group operation Power supply switch connector connection
tion
the system con- for transmission of units in a sys-
troller
lines tem with multiple
outdoor units
System with one
-
- -
Leave CN41 as it is
outdoor unit
(Factory setting)
System with multi- Not connected
-
Not grouped
pie outdoor units
Grouped Disconnect the male connector from the fa-
With connection Not required
Grouped/not
male power supply switch connector (CN41)
and connect it to the female power supply
to the indoor grouped
switch connector (CN40) on only one of the
unit system
outdoor units: 2
With connection
Not required*1
Grouped/not
*Connect the S (shielded) terminal on the
to the central- (Powered from grouped
terminal block (TB7) on the outdoor unit
ized control sys- the outdoor unit)
whose CN41 was replaced with CN40 to
tem
the ground terminal (rl7) on the electric box.
Required *1 Grouped/not Leave CN41 as itis
grouped (Factory setting)
*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 Centralized control switch settings *1
Connection to the system controller Not connected Leave it to OFF. (Factory setting)
Connection to the system controller
Connected*2
ON
*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 buill-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 buill-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.
HWEOB03A
- 21 -
GB