Panasonic U-20ME1E81, Service Manual

Page: 10 / 177

2WAY SYSTEM
Control Functions
-
Outdoor Unit
1 - 2
1
1. Introduction
The 2WAY system allows multiple outdoor units to be connected.
-This system can be expanded to connect a maximum of 3 outdoor units.
-The maximum system capacity is 60HP. (at the standard-COP mode)
PCB setting of outdoor unit
All the outdoor units contain inverter compressors. The main and the sub units have to be set on the PCB of
each outdoor unit.
-Main outdoor unit
The outdoor unit where the unit No. is set to “1” activates the CCU (command controller unit) functions that
controls the entire system. This outdoor unit is main outdoor unit.
For the main outdoor unit, perform all the settings in the table below.
-Sub outdoor unit
The outdoor unit where the unit No. is set to other than “1” is a sub outdoor unit.
The system will not operate if no outdoor unit has been set as unit No. “1.”
Required settings
Factory preset
mode
Main outdoor
unit
On-site setting
Sub outdoor unit
On-site setting
System address 1 System 1 ~ 30 Not necessary
No. of indoor units 1 1 ~ 64 units Not necessary
No. of outdoor units 1 1 ~ 3 units Not necessary
Unit No. 1 Unit No. 1 Unit Nos. 2 ~ 3
The CCU functions are disabled at sub units. Therefore no problems will result even if the system address, No. of
indoor units, and No. of outdoor units settings are made at the sub units.
SM830204-05_2WAY SYS.indb 2 2015/01/21 16:59:58