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Mini VRF SYSTEM
Control Functions - Outdoor unit
1
12. Outdoor Unit Control PCB
(3) Functions
A. ADD pin (2P, Black) Auto address setting pin
• Short-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. Auto 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 auto address setting is in progress, the 2 LEDs (LED1, 2: Red) on the outdoor unit
control PCB blink alternately. (Short-circuiting this pin while auto address setting is in progress
will stop the auto address setting operation.)
SW1
DIP switch (2P, Black)
Switches for setting system address 10s digit and 20s digit
• If 10 systems or more are set, the setting is made by a combination of this DIP switch and
S002.
• 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 30 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit) to ON.
(For details, see Table 1.)
SW2
Rotary switch
(10 positions, Yellow)
Outdoor system address setting switch
• 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 30 systems (up to 64 indoor units) can be
connected. This setting can be set up to “39”, however control will be for 30 systems even
if the setting is set to higher than 30. An alarm will be displayed if system addresses are
duplicated. (For details, see Table 1.)
SW3
DIP switch (2P, Black)
Switches for setting the 10s and 20s digit for the number of connected indoor units
• If 10 systems or more are set, the setting is made by a combination of this DIP switch and
SW4.
• If 10 - 15 units are set, set only switch 1 (10s digit) to ON.
• Switch 2 is not used. (For details, see Table 2.)
SW4
Rotary switch
(10 positions, Red)
Switch 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, see Table 2.)
SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 33SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 33 2021/05/07 10:10:302021/05/07 10:10:30
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