XCT-7 Variable Refrigerant Flow Controls
Owner’s ManualMODEL NAME:
KNX Gateway
Installation and Owner’s Manual
40VCBK17FQEE
1-T-40VCQUE-231020-EN-0

KNX gateway —40VCBK17FQEE 40VCBK27FQEE 40VCBK37FQEE

40VCBK17/27/37FQEE allows a complete and natural integration of air conditioners with KNX control systems.
Compatible with all models of XCT7 line of air conditioners. Each SD outdoor unit, 40VCCR17FQEE required.
Main features:
Compatible with all models of XCT7 line of air conditioners.

• Reduced dimensions. Installation even inside the A.C. indoor unit.
• Quick and non-visible installation.
• External power not required.
• Direct connection to the KNX EIB bus.
• Direct connection to the AC indoor unit.
• Fully KNX interoperable, configuration from ETS.
• Multiple objects for control (of different types: bit, byte, characters…).
• Control of the AC unit based in the ambient temperature read by the own AC unit, or in the ambient temperature read by any KNX thermostat.
• Total Control and Monitoring of the AC unit from KNX, including monitoring of AC unit’s state of internal variables, running hours counter (for filter maintenance control), and error indication and error code.
• AC unit can be controlled simultaneously by the IR remote control of the AC unit and by KNX.
• Max. 8/16/64 indoor units can be connected in one system

Technical Specifications

Connection

Connection of the interface to the AC indoor unit:
Disconnect mains power from the AC unit. Open the front cover of the indoor unit in order to have access to the internal control board. In the control board locate the socket connector marked as ABG1.
Using a 3-wire cable, connect the ABG1 connector from the 40VCBK17/27/37FQEEto the A B G1 connector of the AC unit’s control board.
Fix the 40VCBK17/27/37FQEEinside or outside the AC indoor unit depending on your needs – remember that 40VCBK17/27/37FQEEmust be also connected to the KNX bus. Close the AC indoor unit’s front cover again.
Connection of the interface to the KNX bus:
Disconnect power of the KNX bus. Connect the interface to the KNX TP-1 (EIB) bus using the KNX standard connector (red/grey) of the interface, respect polarity. Reconnect power of the KNX bus.
Connections diagram:

Each Communication Adaptor connects to a single Outdoor Unit.
The 40VCBK17/27/37FQEE can be connected to more than one Communication Adaptor simultaneously.
NOTE: More than one Communication Adaptor can be present in the installation. Please make sure that the address of the Communication Adaptor is correctly set in the ETS. Check section 4.6 for more information.

Configuration and setup

This is a fully compatible KNX device which must be configured and setup using standard KNX tool ETS.
ETS project for this device can be downloaded from: https://www.intesisbox.com/en/carrier-knx-ac-ha-acknx-8_16_64/gateway/ Please consult the README.txt file, located inside the downloaded zip file, to find instructions on how to install the database.

ETS Parameters

When imported to the ETS software for the first time, the gateway shows the following default parameter configuration:
1.1.1 Interface (multiple indoor units)> General configurationWith this configuration it’s possible to send On/Off (Control_ On/Off), change the AC Mode (Control_ Mode), the Fan Speed (Control_ Fan Speed) and also the Setpoint Temperature (Control_ Setpoint Temperature). The Status_ objects, for the mentioned Control_ objects, are also available to use if needed. Objects Status_ AC Ambient Reference Temperature and Status_ Error/Alarm are shown too.    4.1 General configuration
Inside this parameter’s dialog it is possible to activate or change the parameters shown in the Figure 4.1.
4.1.1 Download latest database entry for this product and its User Manual from:
The first field shows the URL where to download the database and the user manual for the product.4.1.2 Intesis Product
This parameter is used to check, before sending the programing, the maximum number of AC units your device supports. Select the version of the gateway that you have:

• 40VCBK17FQEE, if you only want to control up to 8 AC unit.
• 40VCBK27FQEE, if you only want to control up to 16 AC units.
• 40VCBK37FQEE, if you only want to control up to 64 AC units

4.1.3 Number of Indoor Units in ETS
This parameter is used to hide/show communication object according to the number of AC units you need to configure. Value ranges go from 1 to 64. In case you introduce a number higher than the maximum number of units allowed by your license, you will get a warning message. This is just for information and will not block the configuration process. Configurations with more indoor units configured than the ones allowed by the license will not be downloaded correctly. 4.1.4 First Status Updated to KNX
This parameter defines how fast the status is updated to KNX. Depending on the value selected, more or less priority will be assigned to this action. As there are so many parameters available, it is important to consider carefully how to set this parameter.

• If set to “ASAP”, all status communication objects will send its value (if needed).
• If set to “Slow”, all status communication objects will send its value (if needed), but slower than in the previous option (ASAP).
• If set to “Super Slow”, all status communication objects will send its value (if needed), but slower than in the previous option (Slow).

4.1.5 Enable object “Error Code [2byte]”
This parameter shows/hides the Status_ Error Code communication object which shows the indoor unit errors, if occurred, in numeric format.o If set to “Disabled” the object will not be shown.
o If set to “Enabled” the Status_ Error Code [2byte signed value] object will appear.
This object can be read and also sends the indoor unit error, if occurred, in numeric format. If a “0” value is shown that means no error.
4.1.6 Enable object “Error Text Code [14byte]”
This parameter shows/hides the Status_ Error Text Code communication object which shows the indoor unit errors, if occurred, in text format.o If set to “Disabled” the object will not be shown.
o If set to “Enabled” the Status_ Error Text Code object will appear.
This object can be read and also sends the indoor unit error, if occurred, in text format. The errors shown have the same format as in the remote controller and in the error list from the indoor unit manufacturer. If the object’s value is empty, that means there is no error.
4.2 Global mode configuration
1.1.1 Interface (multiple indoor units)> Global Mode ConfigurationAll the parameters in this section are related with the different mode properties and communication objectsThe byte-type communication object for Mode works with the DTP_20.105. Auto mode will be enabled with a “0” value, Heat mode with a “1” value, Cool mode with a “3” value, Fan mode with a “9” value and Dry mode with a “14” value.
4.2.1 Enable use of “Operating Mode” objects
This parameter shows/hides the Control_ and Status_ Mode Operating Mode communication objects.4.2.2 Enable use of Mode Heat/Cool objects
This parameter shows/hides the Control_ and Status_ Mode Cool/Heat communication objects.o If set to “Disabled” the objects will not be shown.
o If set to “Enabled” the Control_ and Status_ Mode Cool/Heat objects will appear.
• When a “1” value is sent to the Control_ communication object, Heat mode will be enabled in the indoor unit, and the Status_ object will return this value.
• When a “0” value is sent to the Control_ communication object, Cool mode will be enabled in the indoor unit, and the Status_ object will return this value.
4.2.3 Enable use of + / – object for Mode
This parameter shows/hides the Control_ Mode +/- communication object which let’s you change the indoor unit mode by using two different datapoint types.o If set to “Disabled” the object will not be shown.
o If set to “Enabled” the Control_ Mode +/- object and a new parameter will appear.
. DPT type for +/- Mode Object
This parameter lets choose between the datapoints 0-Up / 1-Down [DPT_1.008] and  1- Decrease / 1-Increase [DPT_1.007] for the Control_ Mode +/- object. The sequence followed when using this object is shown below:         Keep in mind that depending on the indoor unit you have and the available features, Auto mode and Dry mode may not be present.
4.2.4 Enable use of bit-type Mode objects (for control)
This parameter shows/hides the bit-type Control_ Mode objects.o If set to “no” the objects will not be shown.
o If set to “yes” the Control_ Mode objects for Auto, Heat, Cool, Fan and Dry will appear. To activate a mode by using these objects a “1” value has to be sent.
4.2.5 Enable use of bit-type Mode objects (for status)
This parameter shows/hides the bit-type Status_ Mode objects.o If set to “no” the objects will not be shown.
o If set to “yes” the Status_ Mode objects for Auto, Heat, Cool, Fan and Dry will appear. When enabled, a mode will return a “1” through its bit-type object.
4.2.6 Enable use of Text object for Mode
This parameter shows/hides the Status_ Mode Text communication object. o If set to “no” the object will not be shown.
o If set to “yes” the Status_ Mode Text object will appear. Also, in the parameters, will be shown five text fields, one for each mode, that will let modify the text string displayed by the Status_ Mode Text when changing mode. 4.3 Global Fan Speed Configuration dialog All the parameters in this section are related with the Fan Speed properties and communication objects.
4.3.1 DPT object type for fan speed
With this parameter is possible to change de DPT for the Control_ Fan Speed and Status_ Fan Speed byte-type communication objects. Datapoints Scaling (DPT_5.001) and Enumerated (DPT_5.010) can be selected.
o When “Enumerated [DPT 5.010]” is selected, Control_ Fan Speed and Status_ Fan Speed communication objects for this DPT will appear. Also, depending on the number of fan speeds selected, these objects will be different. The first fan speed will be selected if a “1” is sent to the Control_ object. The second one will be selected sending a “2”, and the last one sending a “3”.
The Status_ object will always return the value for the fan speed selected.
Important: If a “0” value is sent to the Control_ object, the minimum fan speed will be selected. If a value bigger than “3” is sent to the Control_ object, then the maximum fan speed will be selected.
o When “Scaling [DPT 5.001]” is selected, Control_ Fan Speed and Status_ Fan Speed communication objects for this DPT will appear. Also, depending on the number of fan speeds selected, these objects will be different. When a value between 0% and 49% is sent to the Control_ object the first fan speed will be selected.
When a value between 50% and 83% is sent to the Control_ object, the second speed will be selected.
When a value between 84% and 100% is sent to the Control_ object, the third speed will be selected.
The Status_ object will return a 33% when the first speed is selected, a 67% for the second one and a 100% for the third one. 4.3.2 Enable use of “Fan Speed Man/Auto” objects (for Control and Status)
This parameter shows/hides the Control_ Fan Speed Man/Auto and Status_ Fan Speed Man/Auto communication object which lets you set the Fan Speed into Manual or Auto mode. 4.3.3 Enable use of +/- object for Fan Speed
This parameter shows/hides the Control_ Fan Speed +/- communication object which lets you increase/decrease the indoor unit fan speed by using two different datapoint types. If set to “no” the object will not be shown.

• If set to “yes” the Control_ Fan Speed +/- object and a new parameter will appear.
• Fan speed +/- operation
  This parameter lets choose between the datapoints 0-Up / 1-Down [DPT_1.008] and 0-Decrease / 1-Increase [DPT_1.007] for the Control_ Fan Speed +/- object.
• Sequence for +/- object
  This parameter lets choose between the different modes available:
• S1>S2>….>SN
  Select this option if you don’t have Auto mode and you don’t want roll-over to be enabled.
• S1>S2>….>SN>S1>…
  Select this option if you don’t have Auto mode and you want roll-over to be enabled.
• Auto>S1>S2>….>SN
  Select this option if you have Auto mode and you don’t want roll-over to be enabled.
• Auto>S1>S2>….>SN>Auto>S1>…
  Select this option if you have Auto mode and you want roll-over to be enabled.

4.3.4 Enable use of bit-type Fan Speed objects (for Control)
This parameter shows/hides the bit-type Control_ Fan Speed objects.o If set to “no” the objects will not be shown.
o If set to “yes” the Control_ Fan Speed objects for Speed 1, Speed 2 and Speed 3 (if available) will appear. To activate a Fan Speed by using these objects a “1” value has to be sent.
4.3.5 Enable use of bit-type Fan Speed objects (for Status)
This parameter shows/hides the bit-type Status_ Fan Speed objects. o If set to “no” the objects will not be shown.
o If set to “yes” the Status_ Fan Speed objects for Speed 1, Speed 2 and Speed 3 (if available) will appear. When a Fan Speed is enabled, a “1” value is returned through its bit- type object.
4.3.6 Enable use of Text object for Fan Speed
This parameter shows/hides the Status_ Fan Speed Text communication object. o If set to “no” the object will not be shown.
o If set to “yes” the Status_ Fan Speed Text object will appear. Also, in the parameters, will be shown two (or three, depending on the number of fan speeds selected) text fields, one for each Fan Speed, that will let modify the text string displayed by the Status_ Fan Speed Text when changing a fan speed.4.4 Global temperature configuration All the parameters in this section are related with the Temperature properties and communication objects.
4.4.1 Enable use of +/- obj for Setpoint
This parameter shows/hides the Control_ Setpoint Temp +/- communication object which lets you change the indoor unit setpoint temperature by using two different datapoint types.o If set to “no” the object will not be shown.
o If set to “yes” the Control_ Setpoint Temp +/- object and a new parameter will appear.. DPT type for +/- Setp Temp object
This parameter lets choose between the datapoints 0-Up / 1-Down [DPT_1.008] and 1- Decrease / 1-Increase [DPT_1.007] for the Control_ Setpoint Temp +/- object. 4.4.2 Ambient Ref. Temp. is provided from KNX
This parameter shows/hides the Control_ Ambient Temperature communication object which lets you use an ambient temperature reference provided by a KNX device. o If set to “no” the object will not be shown.
o If set to “yes” the Control_ Ambient Temperature object will appear. Meant to be enabled when you want the temperature provided by a KNX sensor to be the reference ambient temperature for the air conditioner. Then, the following formula applies for the calculation of real Control_ Setpoint Temperature sent ot the AC unit:
“AC Setp. Temp” = “Ambient ref. Temp” – (“KNX Amb. Temp.” – “KNX Setp Temp.”)

• AC Setp. Temp: AC indoor unit setpoint temperature
• Ambient Ref. Temp: AC indoor unit return temperature
• KNX Amb. Temp.: Ambient temperature provided from KNX
• KNX Setp. Temp: Setpoint temperature provided from KNX

As an example, consider the following situation:
User wants: 19ºC (“KNX Setp. Temp.”)
User sensor (a KNX sensor) reads: 21ºC (“KNX Amb Temp.”) Ambient temp. read by system is: 24ºC (“Ambient Ref. Temp”)
In this example, the final setpoint temperature that 40VCBK17/27/37FQEEwill send out to the indoor unit (shown in “Setp. Temp.”) will become 24ºC – (21ºC – 19ºC)
= 22ºC. This is the setpoint that will actually be requested to unit.
This formula will be applied as soon as the Control_ Setpoint Temperature and Control_ Ambient Temperature objects are written at least once from the KNX installation. After that, they are kept always consistent.
Note that this formula will always drive the AC indoor unit demand in the right direction, regardless of the operation mode (Heat, Cool or Auto).

4.5 Control Mode configuration All the parameters in this section are related with the Mode properties and communication objects.
4.5.1 Enable use of Control Mode objects (for Control and Status)
This parameter shows/hides the Control_ Control Mode and Status_ Control Mode communication objects which lets you change the indoor unit control: No Central, LIFO (Last Input First Output), Central Controller and Lock Central Controller.

• If set to “no” the objects will not be shown.
• If set to “yes” the Control_ and Status_ Control Mode objects for No Central, LIFO (Last Input First Output), Central Controller, Lock Central Controller will appear.

4.5.1 Initial state of Control Mode
This parameter sets the initial value for the Control Mode: No Central, LIFO (Last Input First Output), Central Controller, Lock Central Controller or Do not initialize.

• If set to “Apply same initial state to all Indoor Units”, the parameter option selected will apply to all indoor units.
• If set to “Initial state for each Indoor Unit might differ”, you will be able to set this parameter for each Indoor Unit individually.

4.6 Addressing of Indoor Units In this section you will be able to set the AC addressing for each AC unit present in the installation.

• Modbus GW address of ACxx refers to the addres of the Communication Addapters.
• IDU index (in Modbus GW) of ACxx refers to the AC system address of the Indoor Unit.

4.7 LicenseUse this section to introduce the migration code in case you need to update your box from another version different from the factory default one.

Error Codes

Error Code in KNX Object	Error in Remote Controller	Category	Error Name
1	1	Indoor Unit	Indoor ambient temp.sensor TA (Tas) failure
2	2		Indoor gas pipe temp. sensor TC1 failure
3	3		Indoor liquid pipe temp. sensor TC2 failure
4	4		Dual heat source sensor TW failure
5	5		Indoor EEPROM failure
6	6		Communication between indoor and outdoor failure
7	7		Communication between indoor and wired controller failure
8	8		Indoor float switch failure
9	9		Indoor address repeated failure
10	10		Reserved
11	11		Reserved
12	12		No 50 Hz zero passage signal
13	13		Coil sensor TC3 failure
14	14		DC motor failure
15	15		Indoor ambient temp.sensor TA (Taf) failure
16	16		–
17	17	Outoor Unit	–
18	18		–
19	19		–
20	20		Defrosting temp. sensor Tdef1 failure Defrosting temp. sensor Tdef2 failure
21	21		Ambient temp. sensor Ta failure
22	22		Suction temp. sensor Ts1 failure Suction temp. sensor Ts2 failure Suction temp. sensor Tsacc failure Suction temp. sensor Tsuc failure

23	23	Outdoor Unit	Discharging temp. sensor Tdi failure Discharging temp. sensor Td1 failure Discharging temp. sensor Td2 failure
24	24		Oil temp. sensor Toilp failure Oil temp. sensor Toil failure
25	25		Inlet temp. of heat exchanger Toci1 failure Inlet temp. of heat   exchanger Toci2 failure indoor communication failure Reduce the number of indoor units failure Increase the number of indoor units failure
26	26
27	27		Oil temp. too high protection (Toil) Oil temp. too high protection (Toi2)
28	28		High pressure sensor Pd1 failure High pressure sensor Pd2 failure
29	29		Low pressure sensor Ps failure
30	30		High pressure switch HPSi failure High pressure switch HPS1 failure High pressure switch HPS2 failure
31	31		Liquid pipe pressure Pl failure
32	32		Outlet temp. of subcooler Tsco failure Liquid pipe SC temp. of subcooler Tliqsc failure
33	33		EEPROM (AT24C04) failure
34	34		Discharging temp. too high protection (Tdi) Discharging temp. too high protection (Td1) Discharging temp. too high protection (Td2)
35	35		4-way valve reversing failure 4-way valve reversing failure
36	36		Oil temp. too low protection (Toil) Oil temp. too low protection (Toi2) Lack of phase of 3N power supply or wrong phase sequence
37	37
38	38		High pressure sensor Pd too low protection
39	39		Low pressure sensor Ps too low protection Compression ratio too high protection Compression 1 ratio too low protection Compression 2 ratio too low protection
40	40		High pressure sensor Pd1 too high protection High pressure sensor Pd2 too high protection
41	41		Water temp. Twi too low protection Water temp. Twi too high protection
42	42		Frost protection of water system Water system out of water freeze protection Water flow of Water system is too small to protect
43	43		Discharging temp. sensor Tdi too low protection Discharging temp. sensor Td1 too low protection Discharging temp. sensor Td2 too low protection
44	44		Low pressure sensor PS too high protection
45	45		Communication among outdoors failure
46	46		Communication with inverter board 1 failure Communication with inverter board 2failure
47	47		–
48	48		Unloading valve SV1 failure
49	49		–

50	50	Outdoor Unit
51	51		–
52	52		–
53	53		Current detector CT1 failure
54	54		Communication with Thermal storage module failure
55	55		Thermal storage module LEV failure
56	56		Thermal storage module too hot failure
57	57		Communication between Thermal storage module and host computer
58	58		Thermal storage module Tc1 temp. sensor failure
59	59		Thermal storage module Tc2 temp. sensor failure
60	60		Reserved
61	61		Reserved
62	62		Reserved
63	63		Thermal storage module DIP setting failure
64	64		CT1 over current CT2 over current
65	65		–
66	66		–
67	67		Communication with motor driving board failure
68	68		–
69	69		–
70	70		–
71	71		Left DC motor blocked Right DC motor blocked
72	72		Left DC motor reversed Right DC motor reversed
73	73		Left DC motor current too high Right DC motor current too high
74	74		–
75	75		No pressure drop between high pressure and low one Pressure too low between high pressure and low one
76	76		Incorrect outdoor address or capacity setting
77	77		Oil equalization protection among outdoors
78	78		Lack of refrigerant in cooling Lack of refrigerant in heating
79	79		Incorrect wiring
80	80		Indoor and outdoor do not match
81	81		Model temp. too high protection
82	82		Compressor current protection
83	83		Wrong model selection
84	84		–
85	85		–
86	86		–
87	87		–
88	88		–
89	89		–
90	90		–
91	91		–
92	92		–
93	93		–
94	94		–
95	95		–
96	96		–

97	97	Outdoor Unit	–
98	98		–
99	99		Program self-test failure
100	100		DC motor driving board IPM alarm
101	101		DC motor driving board detecting out of control
102	102		DC motor driving board EEPROM faulty
103	103		DC motor driving board over current or current detector damaged
104	104		Voltage too low protection of DC motor driving board
105	105		Voltage too high protection of DC motor driving board
106	106		DC motor driving board blocked
107	107		Protection of motor rate over Limitation
108	108		–
109	109		–
110	110		model 1 Over current model 2 Over current
111	111		Compressor 1 out of control Compressor 2 out of control
112	112		Radiator of model 1 temp. too high Radiator of model 2 temp. too high
113	113		model 1 overload
			model 2 overload
114	114		Voltage too low of model 1 Voltage too low of model 2
115	115		Voltage too high of model 1 Voltage too high of model 2
116	116		Communication abnormal with model 1 Communication abnormal with model 2
117	117		Model 1 Over current (software) Model 1 Over current (software)
118	118		Model 1 startup failure Model 2 startup failure
119	119		Current Detecting Circuit Abnormal of transducer 1 Current Detecting Circuit Abnormal of transducer 2
120	120		Power supply of transducer 1 abnormal Power supply of transducer 2 abnormal
121	121		Power supply of inverter board 1 is abnormal Power supply of inverter board 2 is abnormal
122	122		Radiator temp. sensor of transducer 1 abnormal Radiator temp. sensor of transducer 2 abnormal
123	123		–
124	124		–
125	125		Compressor 1 frequency not match Compressor 2 frequency not match
126	126		–
127	127		MCU reset abnormal
128	128		MCU Program needs to be upgraded
0	N/A	KNX interface	No error
65535 (-1)	N/A	KNX interface	Indoor Units not ready for communication
65436 (-100)	N/A	KNX interface	License Error / indoor unit not supported by current license
65336 (-200)	N/A	KNX interface	Overconsumption error in EXY bus

In case you detect an error code not listed, contact your nearest technical support service for more information on the error meaning.
Appendix A – Communication Objects Table

SECTION	OBJECT NUMBER	NAME	LENGTH	DATAPOINT TYPE		FLAGS
				DPT_NAME	DPT_ID	R	W	T	U	FUNCTION
On/Off	1	Control_ On/Off	1 bit	DPT_Switch	1.001		W	T		0 – Off; 1-On
Mode	2	Control_ Operating Mode	1 byte	DPT_HVACMode	20.102		W	T		0 – Auto; 1 – Com; 2 – Stan; 3 – Eco; 4 – Pro
	3	Control_ Mode	1 byte	DPT_ HVACControl	20.105		W	T		0 – Auto; 1 – Heat; 3 – Cool; 9 – Fan; 14 – Dry
	4	Control_ Mode Cool/Heat	1 bit	DPT_Cool/Heat	1.1		W	T		0 – Cool; 1 – Heat
	5	Control_ Mode Auto	1 byte	DPT_Scaling	5.001		W	T		1 – Auto
	6	Control_ Mode Heat	1 byte	DPT_Scaling	5.001		W	T		1 – Heat
	7	Control_ Mode Cool	1 bit	DPT_Bool	1.002		W	T		1 – Cool
	8	Control_ Mode Fan	1 bit	DPT_Bool	1.002		W	T		1 – Dry
	9	Control_ Mode Dry	1 bit	DPT_Bool	1.002		W	T		1 – Fan
	10	Control_ Mode +/-	1 bit	DPT_Step	1.007		W			0 – Decrease; 1 – Increase
		Control_ Mode +/-	1 bit	DPT_UpDown	1.008		W			0 – Up; 1 – Down
Fan Speed	11	Control_ Fan Speed / 3 Speeds	1 byte	DPT_Scaling	5.001		W	T		0%-49% – Speed 1; 50%-83% – Speed 2;84%-100% Speed 3
		Control_ Fan Speed / 3 Speeds	1 byte	DPT_Enumerated	5.01		W	T		1 – Speed 1; 2 – Speed 2; 3 Speed  3
	12	Control_ Fan Speed Man/Auto	1 bit	DPT_Bool	1.002		W	T		0 – Manual; 1 – Auto
	13	Control_ Fan Speed 1	1 bit	DPT_Bool	1.002		W	T		1 – Fan Speed 1
	14	Control_ Fan Speed 2	1 bit	DPT_Bool	1.002		W	T		1 – Fan Speed 2
	15	Control_ Fan Speed 3	1 bit	DPT_Bool	1.002		W	T		1 – Fan Speed 3

Fan Speed	16	Control_ Fan Speed +/-	1 bit	DPT_Step	1.007		W	T		0 – Decrease; 1 – Increase
		Control_ Fan Speed +/-	1 bit	DPT_UpDown	1.008		W	T		0 – Up; 1 – Down
Temperature	17	Control_ Setpoint Temperature	2 byte	DPT_Value_Temp	9.001		W	T		17ºC to 30ºC
	18	Control_ Setpoint Temp +/- Control_ Setpoint Temp +/-	1 bit 1 bit	DPT_Step DPT_UpDown	1.007 1.008		W W			0 – Decrease; 1 – Increase 0 – Up; 1 – Down
	19	Control_ Ambient Temperature	2 byte	DPT_Value_Temp	9.001		W	T		ºC value in EIS5 format
Control Mode	20	Control_ Control Mode No Central	1 bit	DPT_Bool	1.002		W	T		1 – No Central Controller
	21	Control_ Control Mode LIFO	1 bit	DPT_Bool	1.002		W	T		1 – Last Input First Output (LIFO)
	22	Control_ Control Mode Central	1 bit	DPT_Bool	1.002		W	T		1 – Central Controller
	23	Control_ Control Mode Lock	1 bit	DPT_Bool	1.002		W	T		1 – Lock Central Controller
On/Off	24	Status_ On/Off	1 bit	DPT_Switch	1.001	R		T		0 – Off; 1-On
Mode	25	Status_ Operating Mode	1 byte	DPT_HVACMode	20.102	R		T		0 – Auto; 1 – Com; 2 – Stan; 3 – Eco; 4 – Pro
	26	Status_ Mode	1 byte	DPT_ nHVACContrMode	20.105	R		T		0 – Auto; 1 – Heat; 3 – Cool; 9 – Fan; 14 – Dry
	27	Status_ Mode Cool/Heat	1 bit	DPT_Heat/Cool	1.1	R		T		0 – Cool; 1 – Heat
	28	Status_ Mode Auto	1 bit	DPT_Bool	1.002	R		T		1 – Auto
	29	Status_ Mode Heat	1 bit	DPT_Bool	1.002	R		T		1 – Hea
	30	Status_ Mode Cool	1 bit	DPT_Bool	1.002	R		T		1 – Cool
	31	Status_ Mode Fan	1 bit	DPT_Bool	1.002	R		T		1 – Fan
	32	Status_ Mode Dry	1 bit	DPT_Bool	1.002	R		T		1 – Dry
	33	Status_ Mode Text	14 byte	DPT_ String_8859_1	16.001	R		T		ASCII String

Fan Speed	34	Status_ Fan Speed / 3 Speeds	1 byte	DPT_Scaling	5.001	R		T		33% – Speed 1; 67% – Speed 2; 100% – Speed 3
		Status_ Fan Speed / 3 Speeds	1 byte	DPT_Enumerated	5.01	R		T		1 – Speed 1; 2 -Speed 2; 3- Speed 3
	35	Status_ Fan Speed Man/Auto	1 bit	DPT_Bool	1.002	R		T		0 – Manual; 1 – Auto
	36	Status_ Fan Speed 1	1 bit	DPT_Bool	1.002	R		T		1 – Speed 1
	37	Status_ Fan Speed 2	1 bit	DPT_Bool	1.002	R		T		1 – Speed 2
	38	Status_ Fan Speed 3	1 bit	DPT_Bool	1.002	R		T		1 – Speed 3
	39	Status_ Fan Speed Text	14 byte	DPT_ String_8859_1	16.001	R		T		ASCII String
Temperature	40	Status_ AC Setpoint Temp	2 byte	DPT_Value_Temp	9.001	R		T		16ºC to 32ºC
	41	Status_ AC Ambient Ref Temp	2 byte	DPT_Value_Temp	9.001	R		T		ºC value in EIS5 format
Error	42	Status_ Error/ Alarm	1 bit	DTP_Alarm	1.005	R		T		0 – No Alarm; 1 – Alarm
	43	Status_ Error Code	2 byte	Enumerated		R		T		0 – No Error; Any other see user’s manual
	44	Status_ Error Text code	14 byte	DPT_ String_8859_1	16.001	R		T		2 char Error; Empty – none
Control Mode	45	Control_ Control Mode No Central	1 bit	DPT_Bool	1.002		W	T		1 – No Central Controller
	46	Control_ Control Mode LIFO	1 bit	DPT_Bool	1.002		W	T		1 – Last Input First Output (LIFO)
	47	Control_ Control Mode Central	1 bit	DPT_Bool	1.002		W	T		1 – Central Controller
	48	Control_ Control Mode Lock	1 bit	DPT_Bool	1.002		W	T		1 – Lock Central Controller

NOTE: This addressing corresponds to the first AC indoor unit of the configuration. Communication objects for the rest of AC units are consecutively listed .
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Documents / Resources

Carrier XCT-7 Variable Refrigerant Flow Controls [pdf] Owner's Manual XCT-7 Variable Refrigerant Flow Controls, XCT-7, Variable Refrigerant Flow Controls, Refrigerant Flow Controls, Flow Controls

References

• User Manual