4 -
3
4
4
- 3
Automatic address setting
(CN100)
S002
S003
S004
S005
S006
S007
• 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. 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. (Short-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 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, refer to Table 1.)
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 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 concerning S002 and S003, refer to Table 1.)
DIP switch (2P, blue): 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 S004.
• If 10 - 19 systems are set, set only 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 - 39 systems are set, set only switch 3 (30s digit) to ON.
(For details concerning S004 and S005, refer to Table 2.)
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, refer to Table 2.)
DIP switch (3P, blue): Switches for setting the 10s, 20s, and 30s digit for the number of
connected indoor units
• Turn the switches ON according to the number of outdoor units (1 - 4). (For details, refer
to Table 3.)
DIP switch (3P, blue): Switch for setting the number of outdoor units
• The setting is "1" at the time of shipment. (For details, refer to Table 4.)
DIP switch (3P, blue): Unit No. setting switch
S010
DIP switch (3P, blue): Backup operation switch
If an INV compressor has malfunctioned, turn CT1 ON and Back Up SW ON to operate the
outdoor unit using only the constant-speed compressor.
If a constant-speed compressor has malfunctioned, turn CT2 ON and Back Up SW ON to
operate the outdoor unit using only the INV compressor. (Disconnect the wiring from the
constant-speed compressor.)
Functions (for CR-CHDXP280B)
1. Outdoor Unit Control PCB
