Mitsubishi Electric PURY-HP144, Service Handbook

Page: 33 / 398

[2-3 Switch Settings ]
4
- chapter 2 HWE18220_GB
2 Restrictions
2-3 Switch Settings
1. Switch setting
The necessary switch settings depend on system configuration. Before performing wiring work, refer to the following page(s).
[2-7 Example System with an MA Remote Controller]
[2-8 Example System with an ME Remote Controller]
[2-9 Example System with an MA and an ME Remote Controller]
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.
*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor 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 outdoor units in the same refrigerant circuit.
*4. When setting the switch SW4 of the control board, set it with the outdoor unit power on. Refer to the following page(s).
[5-1-1 Outdoor Unit Switch Functions and Factory Settings]
Units on which to set the switches Symbol Units to which the power must be shut off
CITY MULTI indoor unit Main/sub unit IC Outdoor units
*3
and Indoor units
LOSSNAY, OA processing unit
*1
LC Outdoor units
*3
and LOSSNAY
ATW Booster Unit BU Outdoor units and Booster Unit
Water Hex Unit AU Outdoor units and Water Hex Unit
ME remote controller Main/sub remote
controller RC Outdoor units
*3
MA remote controller Main/sub remote
controller MA Indoor units
CITY MULTI outdoor unit
*2
OC,OS Outdoor units
*3
BC controller Main BC Outdoor units
*3
and BC controller
Sub1 - 11 BS1 - 11 Outdoor units
*3 *4
and BC controller