Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 24

Setting the switches on all sub units
(1) Set the dip switch SW5-9 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 1's digit with SWU1, and set the 10's digit with SWU2. Assign sequential
addresses on all sub units starting with 2.
2. Switch on the power to the unit.
Check for loose or incorrect wiring, and then switch on the power to all units.
When the power is switched on, the following codes will appear on the LED:
• [EEEE] will appear on LD301 on the main unit.
• [9999] will appear on LD301 on the sub units.
3. Set the preset values with the switches on the MAIN circuit board.
(1) Press either one of the push switches SWP1, 2, or 3 (labeled A in the
figure at right) on the circuit board.
* [EEEE] will disappear, and an item code ([101]) will appear on LD301
(labeled B in the figure at right).
(2) Use SWP3 to toggle through the item codes, and select an item code to
change its current value. (The item codes will appear in the following
order: [101] →[102]→[105]→[107]→[101] (back to the beginning).)
(3) Use SWP1 to increase the value and SWP2 to decrease the value.
(4) Press SWP3 to save the changed value.
Following the steps above, set the value for the following items with the switches as necessary. Item [107] must be
set when multiple units are connected to a system.
[101] Not used
[102] Not used
[105] Not used
[107] Total number of the main and sub units in the system
A
B
24
Sub unit
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
A
Main unit
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
[EEEE]
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
SWU1
SWU2
OFF ON
SW7
B
SWU2 SWU1
OFF ON
SW7
SWU1
SWU2
OFF ON
SW7