5
- 9
Mini ECO-i System
PCB and Functions
5
2. Outdoor Unit Control PCB
Automatic address setting
(CN51)
S
002
S
00
3
S
004
JP001
•
S
hort-circuit this pin for 1 second or longer to automatically set the addresses
at the indoor units that are connected to that outdoor unit and are within the
same system.
• The system address is “1” at the time of shipment. Automatic address setting is
necessary even for communications lines in a single system where the inter-
unit control wiring does not cross to any other systems.
• While automatic address setting is in progress, the 2 LEDs (LED1, 2: red) on
the outdoor unit control PCB blink alternately. (
S
hort-circuiting this pin while
automatic address setting is in progress will stop the automatic address setting
operation.)
2P plug (white): Automatic address setting pin
• The setting is “1” at the time of shipment. It is not necessary to change the
setting if wiring is connected only to an outdoor unit and indoor units in a single
system and the inter-unit control wiring does not cross multiple systems.
• If wiring links the inter-unit control wiring for multiple systems to the same
communications lines, then a different address must be set for each refrigerant
tubing system.
• If wiring links multiple systems, a maximum of
3
0 systems (up to 64 indoor
units) can be connected. This setting can be set up to “
3
9,” however control will
be for
3
0 systems even if the setting is set to higher than
3
0. An alarm will be
displayed if system addresses are duplicated. (For details, refer to Table 1.)
• A connecting socket (
3
P, black) is attached to the terminal plug at the time of
shipment from the factory.
• In the case of link wiring which combines the inter-unit control wiring for
multiple systems into a single communications circuit, leave the connecting
socket in place at only one of the outdoor units, and move the socket from the
“
S
HORT” side to the “OPEN” side at all other outdoor units. If multiple
connecting sockets are left in place, communications trouble will occur.
Rotary switch (10 positions, black): Outdoor system address setting switch
• If 10 systems or more are set, the setting is made by a combination of this DIP
switch and
S
002.
• If 10 – 19 systems are set, set switch 1 (10s digit) to ON.
• If 20 – 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1 (10s
digit) to OFF.
• If
3
0 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit) to
ON.
(For details concerning
S
002 and
S
00
3
, refer to Table 1.)
DIP switch (2P, blue):
S
witches for setting system address 10s digit and 20s digit
Rotary switch (16 positions, red):
S
witch for setting the number of connected
indoor units
In order to allow the outdoor unit to manage indoor units in the same refrigerant
system, set the number of connected indoor units. (For details, refer to Table 2.)
Terminal plug
Jumper wire:
3
P plug (black): For communications circuit impedance matching
6HP PCB board – Present
4, 5 HP PCB board – Not present
2. Functions of Outdoor Unit PCB
06-408 Mini_ECOi_SM5 11/10/06 5:20 PM Page 9
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