Automatic Address Setting - Sanyo Big PACi 18 Series Technical Data & Service Manual

2-22. Automatic Address Setting

2-22-1. Basic wiring diagram
Link wiring
NO T E
A terminal plug (black) is attached to each of the outdoor unit control PCBs. At only one outdoor unit,
leave the terminal plug short-circuit socket on the "Yes" side. At all the other outdoor units, change the
socket (from "Yes" to "No").
A maximum of 8 indoor units can be connected to 1 remote controller for group control.
Refrigerant system No. 1
System address
rotary switch on
the outdoor unit
PCB
No. 1
Outdoor unit
Terminal plate 1, 2
Terminal plate 1, 2
Indoor unit
1-1
Remote controller
Automatic address setting from the outdoor unit
(X, T, U, D Types)
Case 1
If the power can be turned ON separately for the
indoor and outdoor units in each system, the indoor
unit addresses can be set without running the
compressor.
(1) Turn on the indoor and outdoor unit power for
refrigerant system 1.
Press and hold the automatic address setting button
(black) for 1 second or longer at the outdoor unit
where the power was turned ON.
Communication for automatic address setting
begins.
LED 1 and 2 on the outdoor unit control PCB blink
alternately, and turn OFF when address setting is
completed.
(2) Next, turn ON the power only at the indoor and
outdoor units in a different system. Press the
automatic address setting button (black) on the
outdoor unit.
LED 1 and 2 on the outdoor unit control PCB blink
alternately, and turn OFF when address setting is
completed.
Repeat the same procedure for each system and
complete automatic address setting.
(3) Operation using the remote controller is now
possible.
Refrigerant system No. 2
(Change setting to "1")
No. 2
Inter-unit control
wiring
2-1
1-2
Remote controller crossover
wiring for group control
<Approximately 4 – 5
minutes are required.>
Refrigerant system No. 3
(Change setting to "2")
Change the terminal
No. 3
plug (black) short-
circuit socket
2-3
2-2
Remote controller
Fig. 2-17
Case 2
If the power cannot be turned ON separately for the
indoor and outdoor units in each system:
The compressors must be run in order to automatically
set the indoor unit addresses. Therefore perform this
step after completing the refrigerant tubing work.
(1) Turn ON the power to the indoor and outdoor units
in all refrigerant systems.
When setting addresses in cooling mode
(2) Short-circuit the mode-change pin at the outdoor unit
where automatic address setting will be performed.
Then press the automatic address setting button
(black).
When setting addresses in heating mode
(2) Press the automatic address setting button (black)
at the outdoor unit where automatic address setting
will be performed.
(3) LED 1 and 2 blink alternately. The compressors begin
running in Cooling (or Heating) mode.
Communication for automatic address setting begins,
using the temperature changes at the indoor units.
<All indoor units are in operating status.>
Address setting is completed when the compressors
stop and the LED indicators turn OFF. <Approxima-
tely 15 minutes is required for 1 system.>
If address setting fails, LED 1 and 2 blink simultane-
ously and the alarm contents are displayed at the
remote controller.
(4) After 1 system is completed, be sure to press the
automatic address setting button (black) at the other
outdoor units to complete automatic address setting
in the same way for each system.
(5) Operation using the remote controller is now possible.
2-19
(Change setting to "3")
Change the terminal
plug (black) short-
circuit socket
Inter-unit control
wiring
3-1 3-2 3-3 3-4
Remote controller
2