Types Of Switch Settings And Setting Methods - Mitsubishi Electric PUHY-P250YJM-A Data Book

5. Types of switch settings and setting methods

Whether a particular system requires switch settings depends on its components. Refer to the section "6. Sample System
Connection" before conducting electrical work.
Keep the power turned off while setting the switches. If settings are changed while being powered, the changed settings will
not register, and the unit may malfunction.
Outdoor unit
Indoor unit
*10HP has only the main controller
(1) Address settings
The need for address settings and the range of address setting depend on the configuration of the system.
Refer to the section "6. Sample System Connection".
Unit or controller
Indoor unit Main · Sub
MA remote controller
Outdoor unit
Heat source unit
(Note1) 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.
(Note2) To set the address of an outdoor unit to "100", set it as 50.
Unit
Main/sub controllers *
Address
Symbol
setting range
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,
01~50 assign a sequential odd number starting with "01" to
IC
(Note 1) the upper indoor controller, and assign "the address
of the upper indoor controller + 1" to the lower indoor
controller.
(For the system with one refrigerant circuit, the lower
circuit board is not used.)
No address setting required.
(The main/sub switch must be configured if two remote controllers
MA
are connected to the system or if the indoor units are connected to
different outdoor units.)
In the system that consists of single refrigerant circuit,
assign an address that equals the lowest indoor unit
(main) address in the same refrigerant circuit plus 50.
Assign sequential addresses to the outdoor units in
OC 51~100 the same refrigerant circuit. Set the OC address to
OS (Note 2) odd number address and OS address to even number
address on the computer room outdoor unit.
In the system that consists of two refrigerant circuits,
assign an address that equals the connected indoor
unit control board address plus 50.
Symbol
OC Turn off the power to outdoor unit
IC Turn off the power to indoor and outdoor units
Address setting method
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Factory setting
Model
00
Main
00