Mitsubishi Electric QAHV Série Manuel D'installation & D'instructions page 32

(4) System configuration procedures : Multiple system
1. Set the dip switches and rotary switches.
(Switches on the main unit* AND on all sub units)
System configuration diagram
External
water
temperature
sensor
Field-supplied dry contact
switch/relay or remote
controller (PAR-W31MAA) or
centralized controller (AE-200)
SW2-9: ON
Address: 1
* The main unit is the unit to which an external water temperature sensor is connected.
Setting the switches on the main unit
Set the dip switch SW2-9 to ON. (multiple unit control) (labeled A in the figure
at right)
Refer to "Factory Switch Settings (Dip switch settings table)" (page 26) for
further details.
Make sure the address of the main unit is set to "1" (labeled B in the figure at
right).
ON
1 2 3 4 5 6 7 8
Setting the switches on all sub units
(1) Set the dip switch SW2-9 to ON. (multiple unit control) (labeled A in the figure
at right)
(2) Set the addresses with the rotary switches. (labeled B in the figure at right).
Set the 10's digit with SWU1, and set the 1's digit with SWU2. Assign
sequential addresses on all sub units starting with 2.
(3) Set the dip switch SW2-6 to OFF. (power supply to communication circuit)
Unit (MAIN circuit)
PCB
Main unit
SW2-6: OFF
SW2-9: ON
Address: 2
The figure at left shows that the switches 1 through 5 are set to ON and 6 through 10 are set to OFF.
9 10
Unit (MAIN circuit)
PCB
Sub unit
Inter-unit wiring
(M-NET line)
GB-32
Unit (MAIN circuit)
PCB
Sub unit
"n" th unit
SW2-6: OFF
SW2-9: ON
Address: 1 + n
10's digit (0) 1's digit (1) (0)
B A
10's digit (0) 1's digit (1) (0)
B A