Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 22

(3) System configuration procedures: Individual system
1. Set the dip switches on the circuit board.
Switch settings on the circuit board
Set the dip switches (labeled A in the figure at right) that correspond to the items
below, according to the local system.
• Water temperature control based on the external water temperature reading
• Water temperature control based on the inlet water temperature
Refer to "Dip switch settings table" (page 19) for further details.
2. Switch on the power to the unit.
Check for loose or incorrect wiring, and then switch on the power to the unit.
When the power is switched on, the following codes will appear on the LED:
• [EEEE] will appear on LD301 in the circuit board (labeled A in the figure at
right).
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 as necessary.
[101] Not used
[102] Not used
[105] Not used
[107] Total number of units in the system (Default = 1) (Leave it as it is.)
22
Unit
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
A
Unit
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
Unit
LD301
SWS2
OFF ON OFF ON OFF ON
A
B
SWS1
REMOTE
OFF
LOCAL
SW4 SW5 SW6
A
SWU1
SWU2
OFF ON
SW7
A
SWU2 SWU1
OFF ON
SW7
B
SWU1
SWU2
OFF ON
SW7