Switch Settings And Address Settings - Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook

[ II Restrictions ]

[3] Switch Settings and Address Settings

1. Switch setting
Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work.
Set the switches while the power is turned off.
If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not
function properly.
Units on which to set the switches
CITY MULTI indoor unit
LOSSNAY, OA processing unit
M-NET remote controller
MA remote controller
CITY MULTI heat source unit
BC controller
*1. Applicable when LOSSNAY units are connected to the indoor-heat source transmission line.
*2. The heat source units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity
from large to small (if two or more units have the same capacity, in the order of address from small to large).
*3. Turn off the power to all the heat source units in the same refrigerant circuit.
*4. When setting the switch SW4 of the control board, set it with the heat source unit power on. Refer to the following
page(s). VII [1] Functions and Factory Settings of the Dipswitches.
HWE15150
Symbol
Main/sub unit IC
*1
LC
Main/sub remote RC
controller
Main/sub remote MA
controller
*2
OC,OS
Main BC
Sub1, 2 BS1, BS2
- 21 -
Units to which the power must be shut off
*3
Heat source units and Indoor units
*3
Heat source units and LOSSNAY
*3
Heat source units
Indoor units
*3
Heat source units
*3
Heat source units and BC controller
*3 *4
Heat source units and BC controller
GB