Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

Page: 42 / 436

[2-4 M-NET Address Settings ]
BS_02_E chapter 2 -
5
2
Rest
rict
io
ns
2-4-2 Outdoor Unit Power Jumper Connector Connection
There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK
for details.
*1 The need for a power supply unit for transmission lines depends on the system configuration. Some controllers, such as
GB-50ADA, have a function to supply power to the transmission lines.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the
system.
2-4-3 Outdoor Unit Centralized Controller Switch Setting
*1 Set SW5-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2 When only the LM adapter is connected, leave SW5-1 to OFF (as it is).
2-4-4 Room Temperature Detection Position Selection
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.
(Factory setting: SW1-1 set to "OFF".)

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.
System configu-
ration Connection to
the system con-
troller Power supply unit
for transmission
lines Group operation
of units in a sys-
tem with multiple
outdoor units Power supply switch connector connection
Single refriger-
ant system _ _ _ CN41 (Factory setting)
System with
multiple outdoor
units (refriger-
ant circuits) Not connected _ Not grouped
Not required Grouped Disconnect the male connector from the fe-
male power supply switch connector (CN41)
and connect it to the female power supply
switch connector (CN40) on only one of the
outdoor units.
*2
*Connect the S (shielded) terminal on the ter-
minal block (TB7) on the outdoor unit whose
CN41 was replaced with CN40 to the
ground terminal (
) on the electric box.
With connection
to the indoor
unit system Not required Grouped/not
grouped
With connection
to the central-
ized control
system Not required
*1
(Powered from the
outdoor unit)
Grouped/not
grouped
Required *
1
Grouped/not
grouped CN41 (Factory setting)
System configuration Centralized control switch (SW5-1) settings *
1
Connection to the system controller Not connected OFF (Factory setting)
Connection to the system controller Connected *
2
ON
0000004972.BOOK 5 ページ ２０１９年５月８日 水曜日 午後２時４８分