Compatible with VRV and SKY line air conditioners commercialized by Daikin
USER MANUAL
Issue date: 10/2020 r3.8 ENGLISH
IntesisTM INMBSDAI001R000
User’s Manual r3.8 EN
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Important User Information
Disclaimer
The information in this document is for informational purposes only. Please inform HMS Industrial Networks of
any inaccuracies or omissions found in this document. HMS Industrial Networks disclaims any responsibility or
liability for any errors that may appear in this document.
HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product
development. The information in this document shall therefore not be construed as a commitment on the part
of HMS Industrial Networks and is subject to change without notice. HMS Industrial Networks makes no
commitment to update or keep current the information in this document.
The data, examples and illustrations found in this document are included for illustrative purposes and are only
intended to help improve understanding of the functionality and handling of the product. In view of the wide
range of possible applications of the product, and because of the many variables and requirements associated
with any particular implementation, HMS Industrial Networks cannot assume responsibility or liability for actual
use based on the data, examples or illustrations included in this document nor for any damages incurred during
installation of the product. Those responsible for the use of the product must acquire sufficient knowledge in
order to ensure that the product is used correctly in their specific application and that the application meets all
performance and safety requirements including any applicable laws, regulations, codes and standards. Further,
HMS Industrial Networks will under no circumstances assume liability or responsibility for any problems that
may arise as a result from the use of undocumented features or functional side effects found outside the
documented scope of the product. The effects caused by any direct or indirect use of such aspects of the product
are undefined and may include e.g. compatibility issues and stability issues.
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Modbus RTU (EIA-485) Interface for Daikin air conditioners
Compatible with VRV and SKY line air conditioners
commercialized by Daikin
ORDER CODE
LEGACY ORDER CODE
INMBSDAI001R000
DK-RC-MBS-1
IntesisTM INMBSDAI001R000
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INDEX
1. Presentation .......................................................................................................... 5
2. Connection ............................................................................................................ 6
2.1 Connect to the AC indoor unit ............................................................................... 6
2.2 Connection to the EIA-485 bus ............................................................................. 7
3. Quick Start Guide ................................................................................................... 7
4. Modbus Interface Specification ................................................................................ 8
4.1 Modbus physical layer.......................................................................................... 8
4.2 Modbus Registers ................................................................................................ 8
4.2.1 Control and status registers ........................................................................... 8
4.2.2 Configuration Registers................................................................................ 10
4.2.3 Considerations on Temperature Registers ...................................................... 11
4.3 DIP-switch Configuration Interface ...................................................................... 14
4.4 Implemented Functions ..................................................................................... 17
4.5 Device LED indicator ......................................................................................... 17
4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 18
5. Electrical and Mechanical features .......................................................................... 19
6. List of supported AC Unit Types. ............................................................................ 20
7. Error Codes ......................................................................................................... 21
8. Annex 1: Master/Slave of Operation Mode ............................................................... 25
IntesisTM INMBSDAI001R000
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1. Presentation
The INMBSDAI001R000 interfaces allow a complete and
natural integration of Daikin air conditioners into Modbus RTU
(EIA-485) networks.
Compatible with all SKY Air and VRV models commercialized
by Daikin. Check the Section 6 to obtain more information.
Reduced dimensions. 93 x 53 x 58 mm
3.7” x 2.1” x 2.3”
• Quick and easy installation.
Mountable on DIN rail, wall, or even inside the indoor unit on some models of AC.
• External power not required.
• Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSDAI001R000 devices
can be connected in the same network.
INMBSDAI001R000 is a Modbus slave device.
• Direct connection to the AC indoor unit. Up to 16 AC indoor units can be connected to
INMBSDAI001R000, controlling them as one (not individually).
• Configuration from both on-board DIP-switches and Modbus RTU.
• Total Control and Supervision.
• Real states of the AC unit's internal variables.
• Allows simultaneous use of the AC’s remote controls and Modbus RTU.
* Up to 63 Intesis devices can be installed in the same Modbus RTU bus. However, depending on the configured speed, the installation of
Modbus Repeaters may be required
• SCADA
• PLC
• DDC
• BMS
• HMI
• Controller
• etc
Up to 63
AC indoor
units*
Modbus RTU
EIA-485 network
Modbus RTU
Master
device
INMBSDAI001R000
INMBSDAI001R000
INMBSDAI001R000
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Connection to
P1P2 bus. Two
wire cable.
90 mm
3.5”
53 mm / 2.1”
90 mm
3.5”
53 mm / 2.1”
2. Connection
The interface comes with a plug-in terminal block of 2 poles to establish direct connection with
the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish direct
connection with the Modbus RTU EIA-485 network.
2.1 Connect to the AC indoor unit
The INMBSDAI001R000 connects directly to the Daikin P1P2 Bus, which is not provided within
the interface. Depending on which controllers are available, the recommended connection’
methods are the following ones (details in Figure 2. 1):
• Wired remote control available. Connect the gateway as Slave in parallel with the wired
remote controllers (Controller acts as Master).
• Infrared remote control available. Connect the gateway as Master in parallel with the
infrared remote controller (Infrared Remote Control as Slave).
• No remote control available Connect the gateway directly to the P1P2 bus of the indoor
unit as Master when there is no Daikin Remote Controller.
Maximum P1 P2 bus length is 500 meters / 1,640.42 ft . The bus has no polarity sensitivity.
Important: If a wired remote controller of the AC manufacturer is connected in the same bus,
communication may shut down.
Max. 500m / 1,640.42 ft
Max. 500m / 1,640.42 ft
Figure 2. 1 INMBSDAI001R000 Connection diagrams
AC Indoor Unit
MODBUS
RTU
EIA-485
EIA485
A+ B-
P1 P2
AC Unit
For wall mounting
extract the upper
and lower staples
until you hear the
"click".
P1 P2
DAIKIN
Internal
electronic
control
Remote Controller
P2
P1
MODBUS RTU
EIA-485
Bus
EIA485
A+ B-
P1 P2
AC Unit
AC Indoor Unit
Internal
electronic
control
Connection to P1P2
bus. Two wire cable.
P2
P1
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2.2 Connection to the EIA-485 bus
Connect the EIA-485 bus wires to the plug-in terminal block (the one of two poles) of
INMBSDAI001R000 and keep the polarity on this connection (A+ and B-). Make sure that the
maximum distance to the bus is 1,200 meters (3,937 ft). Loop or star typologies are not allowed
in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the
bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 4.6 for
more details).
3. Quick Start Guide
1. Disconnect the air conditioning from the Mains Power.
2. Attach the interface next to the AC indoor unit (wall mounting) following the instructions
of the diagram below or install it inside the AC indoor unit (respect the safety instructions
given).
3. Connect the P1P2 bus between the interface and the AC indoor unit following the
instructions of the diagram. Screw each bare cable end in the corresponding P1P2
terminals of each device.
4. Connect the EIA-485 bus to the connector EIA485 of the interface.
5. Close the AC indoor unit.
6. Check the DIP-Switch configuration of the Intesis interface and make sure it matches the
current installation’s parameters (see section 4.3).
By default, the interface is set to:
▪ Modbus Slave Address ➔ 1
▪ Modbus baud rate ➔ 9600 bps
These parameters can be modified from SW4 and SW3 DIP-Switches.
All other switch positions are set at low level (Off position ) by default.
NOTE: All changes on the DIP-Switch configuration require a system power cycle to be
applied.
7. Connect the AC system to Mains Power.
IMPORTANT: The Intesis interface requires to be connected to the AC unit (powered) to
start communicating.
ON
ON
SW3
SW4
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4. Modbus Interface Specification
4.1 Modbus physical layer
INMBSDAI001R000 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485
line. It performs 8N2 communication (8 data bits, no parity and 2 stop bit) with several available
baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800
bps and 115200 bps). It also supports 8N1 communication (8 data bits, no parity and 1 stop bit).
4.2 Modbus Registers
All registers are type “16-bit unsigned Holding Register” and they use the standard Modbus big
endian notation.
4.2.1 Control and status registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
0
1
R/W
AC unit On/Off
▪ 0: Off
▪ 1: On
1
2
R/W
AC unit Mode 1
▪ 0: Auto
▪ 1: Heat
▪ 2: Dry
▪ 3: Fan
▪ 4: Cool
2
3
R/W
AC unit Fan Speed 1
▪ 0: Auto
▪ 1: Low
▪ 2: Mid
▪ 3: High
3
4
R/W
AC unit Vane Position 1
▪ 1: Position-1 (Horizontal)
▪ 2: Position-2 (Horizontal)
▪ 3: Position-3 (Medium)
▪ 4: Position-4 (Vertical)
▪ 5: Position-5 (Vertical)
▪ 10: Swing
4
5
R/W
AC unit Temperature Setpoint
1,2,3
▪ -32768 (Initialization value)
▪ 16..31ºC (ºC/x10ºC)
▪ 61..92ºF
5
6
R
AC unit Temperature reference
1,2,3
▪ -32768 (Initialization value)
▪ 10..38ºC (ºC/x10ºC)
▪ 50..100ºF
1
Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible values for
this register.
2
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. See section 0 for more information.
3
It is not possible turn to x10 the value shown in Fahrenheit.
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
6
7
R/W
Window Contact
▪ 0: Closed (Default)
▪ 1: Open
7
8
R/W
INMBSDAI001R000 Disablement 4
▪ 0: INMBSDAI001R000 enabled (Default
value)
▪ 1: INMBSDAI001R000 disabled
8
9
R/W
AC Remote Control Disablement 4
▪ 0: Remote Control enabled (Default value)
▪ 1: Remote Control disabled
9
10
R/W
AC unit Operation Time 4
▪ 0..65535 (hours). Counts the time the AC
unit is in “On” state.
10
11
R
AC unit Alarm Status
▪ 0: No alarm condition
▪ 1: Alarm condition
11
12
R
Error Code 5
▪ 0: No error present
▪ 65535(-1 if it is read as signed value): Error
in the communication of INMBSDAI001R000
with the AC unit.
▪ Any other error present, see the table at the
end of this document.
22
23
R/W
Indoor unit´s ambient temperature from
external sensor (at Modbus side)
1,2,3,6,7
▪ -32768: (Initialization value). No
temperature is being provided from an
external sensor.
▪ Any other: (ºC/x10ºC/ºF)
23
24
R
AC Real temperature setpoint
1,2,3,6
▪ When no external temperature is provided,
this read-only register will have the same
value as register 5 (PLC addressing). In all
cases, it will show the current setpoint in the
indoor unit.
▪ 16..31ºC (ºC/x10ºC)
▪ 60..90ºF
26
27
R/W
AC unit Horizontal Vane Position 1
▪ 0: Auto (Default Value)
▪ 10: Swing
55
56
R/W
Under voltage counter 1
▪ 0..300
97
98
R/W
Block Periodic Sendings
4,8,9
▪ 0: Non-blocked (Default value)
▪ 1: Blocked
4
This value is stored in non-volatile memory
5
See section 7 for possible error codes and their explanation
6
See section 0 for more information
7
This register is available in firmware version 0.8 onwards
8
If the register is configured as “0: Non-blocked”, all commands received from Modbus will be sent to the AC system. If “1: Blocked”,
commands from Modbus will only be sent to the AC system if they differ from the previous value.
9
This register applies to firmware version 1.6 onwards
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4.2.2 Configuration Registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
13
14
R/W
“Open Window” switch-off timeout 10
▪ 0..30 (minutes)
▪ Factory setting: 30 (minutes)
14
15
R
Modbus RTU baud-rate
▪ 2400bps
▪ 4800bps
▪ 9600bps (Default)
▪ 19200bps
▪ 38400bps
▪ 57600bps
▪ 76800bps
▪ 115200bps
15
16
R
Modbus Slave Address
▪ 1..63
21
22
R
Max number of fan speeds
48
49
R
Switch value
49
50
R
Device ID: 0x0801
50
51
R
Software version
81
82
R
Error address
▪ Provides the indoor unit’s number which is
showing the error
10
Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.
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4.2.3 Considerations on Temperature Registers
• AC unit temperature setpoint (R/W)
(register 4 – in Protocol address / register 5 – in PLC address):
This is the adjustable temperature setpoint value that must be required by the user. This
register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16). A
remote controller connected to the Daikin indoor unit will report the same temperature
setpoint value as this register, unless virtual temperature is applied.
• AC unit temperature reference (R)
(register 5 – in Protocol address / register 6 – in PLC address):
This register reports the temperature that is currently used by the Daikin indoor unit as
the reference of its own control loop. Depending on the configuration of the indoor unit,
this value can be the temperature reported by the sensor on the return path of the Daikin
indoor unit or the sensor of its remote controller. It is a read-only register (Modbus
functions 3 or 4).
• AC unit external temperature reference (Modbus) (R/W)
(register 22 – in Protocol address / register 23 – in PLC address):
This register allows us to provide an external temperature’s sensor from the Modbus side.
If an external temperature is provided through this register, indoor unit will use it as
reference for its temperature control loop.
o For this temperature to take effect it is required that:
a) The Daikin AC indoor unit is configured in such a way that it uses the
“thermostat sensor in the remote controller” (this is, INMBSDAI001R000
will act as thermostat sensor providing a temperature sensor reading). This
configuration is done via a Daikin remote controller connected to the indoor
unit (Config mode “10” – first code value “2” – second code value “1”) and
must be done by Daikin authorized installers at the time of the installation
of the AC.
Moreover, the DIP Switch SW1-P4 needs to be set as “Daikin Remote
Controller ambient temperature reading“ (On position).
b) INMBSDAI001R000 is set as “master” of P1P2 bus, with respect to an
additional remote controller in the bus (see section “2.1 Connection to the
AC indoor unit” and “4.3 DIP-Switch Configuration Interface”)
o Register value after INMBSDAI001R000 startup is -32768, which means that no
temperature reference is provided to the AC indoor unit. In that case, AC indoor
unit will use its own return path temperature sensor as reference for its control
loop.
In case the INMBSDAI001R000 is set as Master, DIP-Switch SW1-P4 is set as “Daikin
Indoor Unit ambient temperature reading (Default value)” (Off position) and consequently
the Daikin AC indoor unit is set to use its own return path temperature, any value written
in this register will not take effect.
In case the INMBSDAI001R000 is set as Slave and there is a write request from the
Modbus master to register 22/23, “Virtual temperature” will apply:
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SAC = Su – ( Tu – T
AC
)
Where:
SAC - setpoint value currently applied to the indoor unit
Su - setpoint value written at Modbus side (register 4/5)
Tu - external temperature reference written at Modbus side (register 22/23)
TAC - ambient temperature that the indoor unit is using as the reference of its own
control loop (register 5/6)
When INMBSDAI001R000 detects a change in any of the values of
{ Su , Tu , TAC }, it will send the new setpoint (SAC) to the indoor unit.
o Once values have been entered in the “AC unit external temperature’s reference”
(register 22/23) and “AC unit temperature set point” (register 4/5),
INMBSDAI001R000 is going to estimate the temperature chosen implied (e.g. if a
“temperature setpoint (register 4/5)” of 22ºC, and an “external temperature
reference (register 22/23)” of 20ºC are entered, INMBSDAI001R000 will assume
that the user is demanding a +2ºC increase in temperature).
o By knowing at any time, the ambient temperature currently used by the indoor unit
to control its own operation (register 5/6), INMBSDAI001R000 can calculate the
required temperature setpoint needed to apply the decrease/increase on the real
temperature and reach the temperature chosen by the user (following the example
above, if INMBSDAI001R000 reads an “ambient temperature” (register 5/6) of
24ºC in the indoor unit, it will apply a final setpoint of 24ºC + 2ºC = 26ºC).
o At this moment, each time that INMBSDAI001R000 detects a change on the
ambient temperature reported by the indoor unit (register 5/6), it will also change
the required setpoint, in order to keep the temperature required by the user at any
time. If we follow the last example, if INMBSDAI001R000 receives a new
temperature´s value coming from the indoor unit of 25ºC, INMBSDAI001R000 will
automatically adjust the temperature setpoint required of the AC indoor unit to
25ºC + 2ºC = 27ºC).
o After the startup, the value for “external temperature’s reference” (register 22/23)
has a value -32768 (0x8000). This value means that no external temperature
reference is being provided through INMBSDAI001R000. In this scenario, the
setpoint value shown in register 4/5 is always the same as the current setpoint
value of the indoor unit. The AC indoor unit will use its own return path temperature
sensor as reference for its control loop.
o When the mechanism of “Virtual Temperature” is applied, the temperature
setpoint’s value shown by the Remote Controller or other Control System from
Daikin connected to the indoor unit may show a different value from the value
shown in register 4/5.
• AC Real temperature setpoint (R)
(register 23 – In Protocol address / register 24 – in PLC address):
As it has been detailed on the previous point, the real temperature setpoint in the indoor
unit and the temperature setpoint requested from INMBSDAI001R000 might differ (when
a value in register 22/23 – “external temperature reference” is entered and virtual
temperature is applied).
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This register always informs about the current temperature setpoint which is being used
by the indoor unit and it is also includes the temperature setpoint that will be shown by
an additional remote controller from Daikin connected to the indoor unit, if it is present on
the system.
This register will show the same value as AC unit temperature setpoint register
(register 23 – In Protocol address / register 24 – in PLC address) if no virtual temperature
is applied.
Moreover, notice that temperature’s values of all these four registers are expressed according to
the temperature´s format configured through its onboard DIP-Switches (See “4.3 DIP-switch
Configuration Interface”).
These following formats are possible:
• Celsius value: Value in Modbus register is the temperature value in Celsius (i.e. a
value “22” in the Modbus register must be interpreted as 22ºC)
• Decicelsius value: Value in Modbus register is the temperature value in decicelsius
(i.e. a value “220” in the Modbus register must be interpreted as 22.0ºC)
• Fahrenheit value: Value in Modbus register is the temperature value in Fahrenheit
(i.e. a value “72” in the Modbus register must be interpreted as 72ºF (~22ºC).
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4.3 DIP-switch Configuration Interface
All the configuration values on INMBSDAI001R000 can be written and read from Modbus interface.
Otherwise, some of them can also be setup from its on-board DIP-switch interface.
The device has DIP-switches SW1, SW3 and SW4 on the following locations:
The following tables apply to the interface´s configuration through DIP-switches:
SW1 – AC indoor unit’s features
SW1-P1..4
Description
Slave - A Daikin BRC Controller must be present in P1P2 bus, configured as Master (Default value)
Master – Daikin BRC Controller not needed in P1P2 bus. If it exists, it must be configured as Slave
Master of Operation Mode (For VRV only)
Slave of Operation Mode (For VRV only) (Default value) 11
Reserved, not used (Default value)
Reserved, not used
Daikin Indoor Unit ambient temperature reading (Default value) 12
Daikin Remote Controller ambient temperature reading
Table 4.1 SW1: AC indoor unit´s features
11
Explanation in Section 8 of this document
12
From firmware version 1.2 onwards
SW3
SW4
EIA485
A+ B-
P1 P2
AC Unit
SW1
SW1
SW4
ON
1 2 3 4
ON
SW3
1 2 3 4
1 2 3 4 5 6 7 8
ON
ON
ON
ON
ON
ON
ON
ON
ON
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SW3/SW4 – Baud rate configuration
SW3-P7..8
SW4-P3
Description
2400bps
4800bps
9600bps (Default value)
19200bps
38400bps
57600bps
76800bps
115200bps
Table 4.2 SW3-SW4: Modbus baud rate
SW4 – Degrees/Decidegrees (x10), temperature magnitude (ºC/ºF) and EIA-485 termination
resistor.
Table 4.3 SW4: Temperature and termination resistor configuration
SW4-P1..2-4
Description
Temperature values in Modbus register are represented in degrees (x1) (Default value)
Temperature values in Modbus register are represented in decidegrees (x10)
Temperature values in Modbus register are represented in Celsius degrees (Default value)
Temperature values in Modbus register are represented in Fahrenheit degrees
EIA-485 bus without termination resistor (Default value)
Internal termination resistor of 120Ω connected to EIA-485 bus
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
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SW3 – Modbus Slave address
Table 4.4 SW3: Modbus slave address
Add SW3-P1..6
Add SW3-P1..6
Add SW3-P1..6
Add
SW3-P1..6
Add
SW3-P1..6
0
13
26
39
52
1
14
27
40
53
2
15
28
41
54
3
16
29
42
55
4
17
30
43
56
5
18
31
44
57
6
19
32
45
58
7
20
33
46
59
8
21
34
47
60
9
22
35
48
61
10
23
36
49
62
11 24 37 50 63
12 25 38 51
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
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4.4 Implemented Functions
INMBSDAI001R000 implements the following standard Modbus functions:
▪ 3: Read Holding Registers
▪ 4: Read Input Registers
▪ 6: Write Single Register
▪ 16: Write Multiple Registers (Despite this function is allowed, the interface does not allow
to write operations on more than 1 register with the same request, this means that length
field should be always be 1 when this function is being used in case of writing)
4.5 Device LED indicator
The device includes two LED indicators to show all the possible operational states. In the following
table there are written the indicators which can be performed and their meaning.
L1 (green LED)
Device status
LED indication
ON / OFF Period
Description
During not normal
operation
LED blinking
500ms ON / 500ms OFF
Communication error
During normal
operation
LED flashing
100ms ON / 1900ms OFF
Normal operation (configured and
working properly)
L2 (red LED)
Device status
LED indication
ON / OFF Period
Description
During not normal
operation
LED Pulse
3sec ON / --- OFF
Under voltage
L1 (green LED) & L2 (red LED)
Device status
LED indication
ON / OFF Period
Description
During normal
operation
LED Pulse
5sec ON / --- OFF
Device Start-up
During not normal
operation
LED alternatively
blinking
500ms ON / 500ms OFF
Flash checksum not OK
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4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism
EIA-485 bus requires a 120Ω terminator resistor at each end of the bus to avoid signal reflections.
In order to prevent fail status detected by the receivers, which are “listening” the bus, when all
the transmitters’ outputs are in three-state (high impedance), it is also required a fail-safe biasing
mechanism. This mechanism provides a safe status (a correct voltage level) in the bus when all
the transmitters’ outputs are in three-state. This mechanism must be supplied by the Modbus
Master.
The INMBSDAI001R000 device includes an on-board terminator resistor of 120Ω that can be
connected to the EIA-485 bus by using DIP-switch SW4.
Some Modbus RTU EIA-485 Master devices can provide also internal 120Ω terminator resistor
and/or fail-safe biasing mechanism (check the technical documentation of the Master device
connected to the EIA-485 network in each case).
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5. Electrical and Mechanical features
Enclosure
Plastic, type PC (UL 94 V-0)
Net dimensions (dxwxh):
93 x 53 x 58 mm / 3.7” x 2.1” x 2.3”
Color: Light Grey. RAL 7035
Operation
Temperature
0ºC to +60ºC
Weight
85 g.
Stock
Temperature
-20ºC to +85ºC
Mounting
Wall
DIN rail EN60715 TH35.
Operational
Humidity
<95% RH, non-condensing
Terminal Wiring
(for low-voltage
signals)
For terminal: solid wires or stranded wires
(twisted or with ferrule)
1 core: 0.5mm2… 2.5mm2
2 cores: 0.5mm2… 1.5mm2
3 cores: not permitted
Stock Humidity
<95% RH, non-condensing
Modbus RTU
port
1 x Serial EIA485 Plug-in screw terminal
block (2 poles):
A, B
Compatible with Modbus RTU EIA-485
networks
Isolation voltage
1500 VDC
AC unit port
1 x P1P2 bus Plug-in screw terminal block
(2 poles):
P1, P2
Compatible with Daikin networks
Isolation
resistance
1000 MΩ
Switch 1
(SW1)
1 x DIP-Switch for AC features
Protection
IP20 (IEC60529)
Switch 3
(SW3)
1 x DIP-Switch for Modbus RTU settings
LED indicators
2 x Onboard LED - Operational
status
Switch 4
(SW4)
1 x DIP-Switch for extra functions
EIA-485
Port
AC Unit
connection
DIP
Switch SW3
DIP
Switch SW1
LED
Indicators
DIP
Switch SW4
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6. List of supported AC Unit Types.
A list of Daikin indoor unit model’s references compatible with INMBSDAI001R000 and its
available features can be found on this link:
https://www.intesis.com/docs/compatibilities/inxxxdai001rx00_compatibility
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7. Error Codes
Error Code
Modbus
Error in
Remote
Controller
Error category
Error Description
0
N/A
INMBSDAI001R000
No active error
17
A0
External protection devices activated
18
A1
Indoor unit PCB assembly failure
19
A2
Interlock error for fan
20
A3
Drain level system error
21
A4
Temperature of heat exchanger (1) error
22
A5
Temperature of heat exchanger (2) error
23
A6
Fan motor locked, overload, over current
24
A7
Swing flap motor error
25
A8
Overcurrent of AC input
26
A9
Electronic expansion valve drive error
27
AA
Heater overheat
28
AH
Dust collector error / No-maintenance filter error
30
AJ
Indoor
Capacity setting error (indoor)
31
AE
Unit
Shortage of water supply
32
AF
Malfunctions of a humidifier system (water
leaking)
33
C0
Malfunctions in a sensor system
36
C3
Sensor system of drain water error
37
C4
Heat exchanger (1) (Liquid pipe) thermistor
system error
38
C5
Heat exchanger (1) (Gas pipe) thermistor system
error
39
C6
Sensor system error of fan motor locked, overload
40
C7
Sensor system of swing flag motor error
41
C8
Sensor system of over-current of AC input
42
C9
Suction air thermistor error
43
CA
Discharge air thermistor system error
44
CH
Contamination sensor error
45
CC
Humidity sensor error
46
CJ
Remote control thermistor error
47
CE
Radiation sensor error
48
CF
High pressure switch sensor
49
E0
Protection devices activated
50
E1
Outdoor unit PCB assembly failure
52
E3
High pressure switch (HPS) activated
53
E4
Low pressure switch (LPS) activated
54
E5
Overload of inverter compressor motor
55
E6
Over current of STD compressor motor
56
E7
Overload of fan motor / Over current of fan motor
57
E8
Over current of AC input
58
E9
Electronic expansion valve drive error
59
EA
Four-way valve error
60
EH
Pump motor over current
61
EC
Outdoor
Water temperature abnormal
62
EJ
Unit
(Site installed) Protection device activated
63
EE
Malfunctions in a drain water
64
EF
Ice thermal storage unit error
65
H0
Malfunctions in a sensor system
66
H1
Air temperature thermistor error
67
H2
Sensor system of power supply error
68
H3
High Pressure switch is faulty
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69
H4
Low pressure switch is faulty
70
H5
Compressor motor overload sensor is abnormal
71
H6
Compressor motor over current sensor is abnormal
72
H7
Overload or over current sensor of fan motor is
abnormal
73
H8
Sensor system of over-current of AC input
74
H9
Outdoor air thermistor system error
75
HA
Discharge air thermistor system error
76
HH
Pump motor sensor system of over current is
abnormal
77
HC
Water temperature sensor system error
79
HE
Sensor system of drain water is abnormal
80
HF
Ice thermal storage unit error (alarm)
81
F0
No.1 and No.2 common protection device
operates.
82
F1
No.1 protection device operates.
83
F2
No.2 protection device operates
84
F3
Discharge pipe temperature is abnormal
87
F6
Temperature of heat exchanger (1) abnormal
91
FA
Discharge pressure abnormal
92
FH
Oil temperature is abnormally high
93
FC
Suction pressure abnormal
95
FE
Oil pressure abnormal
96
FF
Oil level abnormal
97
J0
Sensor system error of refrigerant temperature
98
J1
Pressure sensor error
99
J2
Current sensor error
100
J3
Discharge pipe thermistor system error
101
J4
Low pressure equivalent saturated temperature
sensor system error
102
J5
Outdoor
Suction pipe thermistor system error
103
J6
Unit
Heat exchanger (1) thermistor system error
104
J7
Heat exchanger (2) thermistor system error
105
J8
Oil equalizer pipe or liquid pipe thermistor system
error
106
J9
Double tube heat exchanger outlet or gas pipe
thermistor system error
107
JA
Discharge pipe pressure sensor error
108
JH
Oil temperature sensor error
109
JC
Suction pipe pressure sensor error
111
JE
Oil pressure sensor error
112
JF
Oil level sensor error
113
L0
Inverter system error
116
L3
Temperature rise in a switch box
117
L4
Radiation fin (power transistor) temperature is too
high
118
L5
Compressor motor grounded or short circuit,
inverter PCB fault
119
L6
Compressor motor grounded or short circuit
120
L7
Over current of all inputs
121
L8
Compressor over current, compressor motor wire
cut
122
L9
Stall prevention error (start-up error) Compressor
locked, etc.
123
LA
Power transistor error
125
LC
Communication error between inverter and
outdoor control unit
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129
P0
Shortage of refrigerant (thermal storage unit)
130
P1
Power voltage imbalance, open phase
132
P3
Sensor error of temperature rise in a switch box
133
P4
Radiation fin temperature sensor error
134
P5
DC current sensor system error
135
P6
AC or DC output current sensor system error
136
P7
Total input current sensor error
142
PJ
Capacity setting error (outdoor)
145
U0
Low pressure drop due to insufficient refrigerant or
electronic expansion valve error, etc.
146
U1
Reverse phase, Open phase
147
U2
Power voltage failure / Instantaneous power
failure
148
U3
System
Failure to carry out check operation, transmission
error
149
U4
Communication error between indoor unit and
outdoor unit, communication error between
outdoor unit and BS unit
150
U5
Communication error between remote control and
indoor unit / Remote control board failure or
setting error for remote control
151
U6
Communication error between indoor units
152
U7
Communication error between outdoor units /
Communication error between outdoor unit and ice
thermal storage unit
153
U8
Communication error between main and sub
remote controllers (sub remote control error) /
Combination error of other indoor unit / remote
control in the same system (model)
154
U9
Communication error between other indoor unit
and outdoor unit in the same system /
Communication error between other BS unit and
indoor/outdoor unit
155
UA
System
Combination error of indoor/BS/outdoor unit
(model, quantity, etc.), setting error of spare parts
PCB when replaced
156
UH
Improper connection of transmission wiring
between outdoor and outdoor unit outside control
adaptor
157
UC
Centralized address duplicated
158
UJ
Attached equipment transmission error
159
UE
Communication error between indoor unit and
centralized control device
160
UF
Failure to carry out check operation Indooroutdoor, outdoor-outdoor communication error,
etc.
209
60
All system error
210
61
PC board error
211
62
Ozone density abnormal
212
63
Contamination sensor error
213
64
Indoor air thermistor system error
214
65
Outdoor air thermistor system error
217
68
HVU error (Venti-air dust-collecting unit)
219
6A
Dumper system error
220
6H
Door switch error
221
6C
Replace the humidity element
222
6J
Replace the high efficiency filter
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223
6E
Replace the deodorization catalyst
224
6F
Simplified remote controller error
226
51
Fan motor of supply air over current or overload
227
52
Fan motor of return air over current / Fan motor of
return air overload
228
53
Others
Inverter system error (supply air side)
229
54
Inverter system error (return air side)
241
40
Humidifying valve error
242
41
Chilled water valve error
243
42
Hot water valve error
244
43
Heat exchanger of chilled water error
245
44
Heat exchanger of hot water error
258
31
The humidity sensor of return air sensor
259
32
Outdoor air humidity sensor error
260
33
Supply air temperature sensor error
261
34
Return air temperature sensor error
262
35
Outdoor air temperature sensor error
263
36
Remote controller temperature sensor error
267
3A
Water leakage sensor 1 error
268
3H
Water leakage sensor 2 error
269
3C
Dew condensation error
339
M2
Centralized remote controller PCB error
345
M8
Communication error between centralized remote
control devices
347
MA
Centralized remote control devices inappropriate
combination
349
MC
Centralized remote controller address setting error
65535
(-1)
N/A
INMBSDAI001R000
Error in the communication of INMBSDAI001R000
with the AC unit
In case to detect an error code not listed, contact your closest Daikin technical support service.
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8. Annex 1: Master/Slave of Operation Mode
The Master/Slave of Operation mode only applies under the following conditions:
1. The AC system is VRV
2. The VRV system uses a Heat pump as outdoor unit
3. There more than one indoor unit in a unique system working at different modes
(Table 8.1)
If they are not matched the parameter is going to be ignored.
The Heat pump outdoor unit of a VRV system can only work in one mode (either Heat, Cool or
fan). The Master of mode is the indoor unit that defines which is the working mode of the outdoor
unit. If no unit has been chosen as the one that defines the working mode of outdoor unit, the
first indoor unit to be turned On is the one which is going to define and control the mode.
In a VRV system, there is only one device acting as Master of Mode. If more than one is configured
in this way, the system is not going to work properly. The configuration will be determined by the
Remote Controller of Daikin. The unit which controls the Operation mode must have installed a
Remote Controller.
When an INMBSDAI001R000 is configured as Master of Mode via the Remote Controller of its
indoor unit, it can control all the modes of the system. The Mode selection of the gateways
remaining and remote controllers installed in the indoor units remaining is going to be affected
by the one chosen as Master of Mode. These ones are going to acquire the Slave of mode
configuration, not being able to change to any mode selection out of the Table 8.1.
Master of Mode
Mode of operation (as Slave of mode of Operation)
Heat
Heat, Fan
Dry
Cool, Fan, Dry
Fan
Fan
Cool
Cool, Fan, Dry
Table 8.1 Master and Slave of Mode configuration
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