Sanyo UHX0752, UHX2452, UHX1252, UHX3652, UHX1852, THX2452, THX1252, THX1852 Functions for CR-CHDX14053

PCB and Functions

1.Outdoor Unit Control PCB

2.Functions (for CR-CHDX14053)

Automatic address setting	2P plug (white): Automatic address setting pin
(CN100)	•	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.)
S002	Rotary switch (10 positions, black): 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, refer to Table 7-1.)
S003	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
		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 7-1.)
S004	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 7-2.)
S005	DIP switch (3P, blue): Switches for setting the 10s, 20s, and 30s 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
		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 7-2.)
S006	DIP switch (3P, blue): Switch for setting the number of outdoor units
	•	Turn the switches ON according to the number of outdoor units (1 - 4). (For details, refer to
		Table 7-3.)
S007	DIP switch (3P, blue): Unit No. setting switch
	• The setting is "1" at the time of shipment. (For details, refer to Table 7-4.)
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.)

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