Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

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[
II
Restrictions ]
[3] Switch Settings and Address Settings
1. Switch setting
Switch settings are necessary depending on the system configuration. Refer to the "[4] An Example of a System to which
an MA Remote Controller is connected " before starting the wiring work. Shut down the power supply before making the
switch settings. If the switch settings are made with the power ON, the settings cannot be changed, and the operation can-
not be performed normally.
2. Address settings
(1) Address settings table
The need for address settings and the range of address setting depend on the configuration of the system.
*1 If a given address overlaps any of the addresses that are assigned to other outdoor units, use a different, unused
address within the setting range.
(2) Power supply switch connector connection on the outdoor unit
(Factory setting: The male power supply switch connector is connected to CN41.)
Unit or controller Symbols Address setting
range
Setting method Ad-
dress
setting
Indoor
unit Main/sub
unit IC 01 to 50
*1
In case of 10HP system or 20HP system with one refrigerant
circuit, assign an odd number starting with "01". In case of
20HP system with two refrigerant circuits, assign a sequential
odd number starting with "01" to the upper indoor controller,
and assign "the address of the upper indoor cont 1" to
the lower indoor controller.
(The lower circuit board of the system with one refrigerant cir-
cuit is not used.) 00
MA remote
controller MA No address settings required. (The main/sub switch must be configured if two
remote controllers are connected to the system or if the indoor units are con-
nected to different outdoor units.) Main
Outdoor unit OC 51 to 100
*1
Assign an address of the indoor units in the same refriger-
ant system and 50. 00
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.
*Connect the S
(shielded) terminal
on the terminal 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 sys-
tem Not required Grouped/not grouped
With connection to
the centralized con-
trol system Not required
(Powered from the
outdoor unit) Grouped/not grouped
Required Grouped/not grouped Leave CN41 as it is
(Factory setting)