Compatible with commercial line for air conditioners commercialized by Hitachi
USER MANUAL
Issue date: 04/2019 r1.5 ENGLISH
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 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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TM
INMBSHIT001R000
User’s Manual r1.5 EN
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Modbus RTU (EIA-485) Interface for Hitachi air
conditioners
Compatible with commercial line for air conditioners
commercialized by Hitachi
ORDER CODE
LEGACY ORDER CODE
INMBSHIT001R000
HI-RC-MBS-1
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
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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 ...................................................................... 12
4.4 Implemented Functions ..................................................................................... 16
4.5 Device LED indicator ......................................................................................... 16
4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 17
5. Mechanical and Electrical features .......................................................................... 18
6. List of supported AC Unit Types ............................................................................. 19
7. Error Codes ......................................................................................................... 20
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
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1. Presentation
The INMBSHIT001R000 interfaces allow a complete and natural
integration of Hitachi air conditioners into Modbus RTU (EIA-485)
networks.
Compatible with commercial line for air conditioner models
commercialized by Hitachi.
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 of AC.
• External power not required.
• Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSHIT001R000 devices
can be connected in the same network.
INMBSHIT001R000 is a Modbus slave device.
• Direct connection to the AC indoor unit. Up to 16 AC indoor units can be connected to
INMBSHIT001R000, 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
INMBSHIT001R000
INMBSHIT001R000
INMBSHIT001R000
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INMBSHIT001R000
User’s Manual r1.5 EN
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1. 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.
1.1 Connect to the AC indoor unit
The INMBSHIT001R000 connects directly to the Hitachi AB 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).
• No remote control available Connect the gateway directly to the AB bus of the indoor
unit as Master when there is no Hitachi Remote Controller.
Important: If there are more than one AC unit connected to the same AB bus, it is
required to install a Hitachi wired Remote Controller (set as Master of the bus)
Maximum AB bus length is 500 m / 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 500 m / 1,640.42 ft
Max 500 m / 1,640.42 ft
A
B
MODBUS RTU
EIA-485
Bus
EIA485
A+ B-
A B
AC Unit
A B
AC Indoor Unit
(It is not mandatory to have it in the network)
Internal
electronic
control board
Remote Controller
HITACHI
B
A
MODBUS RTU
EIA-485
Bus
EIA485
A+ B-
A B
AC Unit
AC Indoor Unit
Internal
electronic
control board
53 mm / 2.1”
90 mm / 3.5”
90 mm / 3.5”
53 mm / 2.1”
For wall mounting
extract the upper
and down staples
until you hear the
"click".
Figure 2. 1 INMBSHIT001R000 connection diagram
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TM
INMBSHIT001R000
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1.2 Connection to the EIA-485 bus
Connect the EIA-485 bus wires to the plug-in terminal block of INMBSHIT001R000 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 3.6 for more details).
2. 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 AB bus between the interface and the AC indoor unit following the
instructions of the diagram. Screw each bare cable end in the corresponding AB
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 3.3).
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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3. Modbus Interface Specification
3.1 Modbus physical layer
INMBSHIT001R000 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).
3.2 Modbus Registers
All registers are type “16-bit unsigned Holding Register” and they use the standard Modbus big
endian notation.
3.2.1 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
▪ 4: Super-high
3
4
R/W
AC unit Vane Position 1
▪ 1: POS1 (Horizontal)
▪ 2: POS2 (Horizontal)
▪ 3: POS3 (Med)
▪ 4: POS4 (Vert)
▪ 5: POS5 (Vert)
▪ 6: POS6
▪ 7: POS7
▪ 10: Swing
4
5
R/W
AC unit Temperature Setpoint
1,2,3
▪ -32768 (Initialization value)
▪ 16..32ºC (ºC/x10ºC)
▪ 61..94ºF
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 3.2.3 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
5
6
R
AC unit Temperature reference
1,2,3
▪ -32768 (Initialization value)
▪ Ranges are specific from
Manufacturer(ºC/x10ºC/ºF)
6
7
R/W
Window Contact
▪ 0: Closed (Default value)
▪ 1: Open
7
8
R/W
INMBSHIT001R000 Disablement 4
▪ 0: INMBSHIT001R000 enabled (Default
value)
▪ 1: INMBSHIT001R000 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
▪ 65535 (-1): Error in the communication of
INMBSHIT001R000 or the Remote Controller
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
▪ -32768: (Initialization value). No
temperature is being provided from an input
sensor. There’s no input sensor.
▪ Any other: (ºC/x10ºC/ºF)
23
24
R
AC Real temperature setpoint
1,2,3,6
▪ -32768 (Initialization value)
▪ 16..31ºC (ºC/x10ºC)
▪ 60..90ºF
24
25
R
Current AC max setpoint
1,2,3
▪ -32768: (Initialization value)
▪ Ranges are specific from Manufacturer
(ºC/x10ºC/ºF)
25
26
R
Current AC min setpoint
1,2,3
▪ -32768 (Initialization value)
▪ Ranges are specific from Manufacturer
(ºC/x10ºC/ºF)
4
This value is stored in non-volatile memory
5
See section 6 for possible error codes and their explanation
6
See section 3.2.3 for more information
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
31
32
R
Status (feedback)
▪ 0: Not active (Default value)
▪ 1: Active (A window is open)
34
35
W
Left/Right Vane pulse
▪ 1: Pulse
66
67
R
Return Path temperature
1,2,3
▪ -32768 (Initialization value)
▪ Any: (ºC/x10ºC/ºF)
98
99
R/W
Master/Slave (gateway)
▪ 0: Slave
▪ 1: Master
3.2.2 Configuration Registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
13
14
R/W
“Open Window” switch-off timeout 7
▪ 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
45
46
W
Error reset
▪ 1: Reset
48
49
R
Switch value
49
50
R
Device ID: 0x1400
50
51
R
Software version
81
82
R
Error address
▪ Provides the indoor unit number which is
providing error
99
100
W
Reset
▪ 1: Reset
7
Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.
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3.2.3 Considerations on Temperature Registers
o 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 Hitachi indoor unit will report the same temperature
setpoint value as this register, but only will happen when no AC unit´s external
reference is provided from INMBSHIT001R000 (see detail for register 22/23 below).
o AC unit ambient temperature reference (R)
(register 5 – in Protocol address / register 6 – in PLC address):
This register reports the temperature that is currently used by the Hitachi 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
Hitachi indoor unit or the sensor of its remote controller. It is a read-only register
(Modbus functions 3 or 4).
o 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. The Hitachi indoor unit does not allow on devices like INMBSHIT001R000 to provide
directly temperature to be used as a reference of the control loop of the AC indoor unit.
In order to overcome this limitation and enable the usage of an external temperature
sensor (i.e.from Modbus side), INMBSHIT001R000 applies the following mechanism (only
if “external temperature’s reference” is being used):
o After a couple of values have been entered in the “AC unit external temperature’s
reference” (register 22/23) and “AC unit temperature set point” (register 4/5),
INMBSHIT001R000 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, INMBSHIT001R000 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), INMBSHIT001R000 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 INMBSHIT001R000 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 INMBSHIT001R000 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 INMBSHIT001R000 receives a
new temperature´s value coming from the indoor unit of 25ºC,
INMBSHIT001R000 will automatically adjust the temperature setpoint required of
the AC indoor unit to 25ºC + 2ºC = 27ºC).
o In general, INMBSHIT001R000 is constantly applying the “Virtual Temperature”
formula:
SAC = Su – ( Tu – T
AC
)
Where:
SAC - setpoint value currently applied to the indoor unit
Su - setpoint value (register 4/5)
Tu - external temperature reference written at Modbus side (register 22/23)
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TAC - ambient temperature that the indoor unit is using as the reference of its
own control loop (register 5/6)
When INMBSHIT001R000 detects a change in any of the values of
{ Su , Tu , TAC }, it will send the new setpoint (SAC) to the indoor unit.
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 INMBSHIT001R000. In this
scenario, the setpoint value shown in register 4/5 will always be the same as the
current setpoint value of the indoor unit. 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
Hitachi connected to the indoor unit may show a different value from the value
shown in register 4/5.
o If it is desired to use the temperature’s reading from the Remote Control as the
external temperature reference (Tu ,register 22/33), the Remote Controller must
be configured as Master, and the Hitachi AC indoor unit must have the option
“thermostat sensor in the Remote Controller” as activated. This configuration is
done via a Hitachi Remote Controller connected to the indoor unit and must be
done by Hitachi authorized installers while the AC is being installed.
o When INMBSHIT001R000 is set as “Master” of AB bus, the external temperature’s
sensor connected to Modbus RTU EIA-485 network provides directly the value
currently applied to the indoor unit ( SAC ), and the process of the Virtual
temperature is not applied. In this case, the Remote Controller or any other
Control System connected from Hitachi is not able to send the external
temperature reference’s value to the register 22/23.
o 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 INMBSHIT001R000 might differ (when
a value in register 22/23 – “external temperature reference” is entered). This register
always informs about the current temperature setpoint which is being used by the indoor
unit.
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 “3.3 - 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).
3.3 DIP-switch Configuration Interface
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All the configuration values on INMBSHIT001R000 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 Hitachi Remote Controller must be present in AB bus, configured as Master (Default value)
Master – A Hitachi Remote Controller not needed in AB bus. If it exists, it must be configured as Slave
Not used (Default value)
Not used
Not used (Default value)
Not used
Not used (Default value)
Not used
Table 4.1 SW1: AC indoor unit´s features
SW3
SW4
EIA485
A+ B-
A B
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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3.4 Implemented Functions
INMBSHIT001R000 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)
3.5 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
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
17 / 20
3.6 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 INMBSHIT001R000 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).
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
18 / 20
4. Mechanical and Electrical 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 AB bus Plug-in screw terminal block
(2 poles):
A, B
Compatible with Hitachi 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
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
19 / 20
5. List of supported AC Unit Types
A list of Hitachi indoor unit model’s references compatible with INMBSHIT001R000 and its
available features can be found on this link:
https://www.intesis.com/docs/compatibilities/inxxxhit001r000_compatibility
Intesis
TM
INMBSHIT001R000
User’s Manual r1.5 EN
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
20 / 20
6. Error Codes
Error
Code
Modbus
Error in
Remote
Controller
Error category
Error Description
0
N/A
INMBSHIT001R0
00
No active error
01
01
Indoor Unit
Tripping of Protection Device
02
02
Outdoor Unit
Tripping of Protection Device
03
03
Transmission
Abnormality between Indoor and Outdoor
04
04
Inverter
Abnormality between Inverter and Control PCB
04
04.
05
05
Transmission
Abnormality of Power Source Wiring
06
06
Voltage drop
Fan motor locked, overload, over current
06
06.
Swing flap motor error
07
07
Cycle
Overcurrent of AC input
08
08
Electronic expansion valve drive error
09
09
Outdoor Unit
Heater overheat
17
11
Sensor on Indoor
Unit
Dust collector error / No-maintenance filter error
18
12
Capacity setting error (indoor)
19
13
Shortage of water supply
20
14
Malfunctions of a humidifier system (water leaking)
25
19
Malfunctions in a sensor system
33
21
Sensor on
Outdoor Unit
Sensor system of drain water error
34
22
Heat exchanger (1) (Liquid pipe) thermistor system error
35
23
Heat exchanger (1) (Gas pipe) thermistor system error
36
24
Sensor system error of fan motor locked, overload
41
29
Sensor system of swing flag motor error
48
30
Sensor system of over-current of AC input
49
31
Suction air thermistor error
50
32
Discharge air thermistor system error
53
35
Contamination sensor error
54
36
Humidity sensor error
56
38
Remote control thermistor error
57
39
Radiation sensor error
67
43
Pressure
High pressure switch sensor
68
44
Protection devices activated
69
45
Outdoor unit PCB assembly failure
70
46
High pressure switch (HPS) activated
71
47
Low pressure switch (LPS) activated
81
51
Inverter
Overload of inverter compressor motor
82
52
Over current of STD compressor motor
83
53
Overload of fan motor / Over current of fan motor
84
54
Over current of AC input
86
56
Outdoor Fan
Electronic expansion valve drive error
87
57
Four-way valve error
88
58
Pump motor over current
176
b0
IU model setting
Incorrect setting address or refrigerant cycle
177
b1
Number setting
Incorrect setting address or refrigerant cycle
181
b5
Incorrect setting of indoor unit number for H-LINK type
238
EE
Inverter
Water temperature abnormal
65535
(-1)
N/A
INMBSHIT001R0
00
Error in the communication of INMBSHIT001R000 or the
Remote Controller with the AC unit
In case to detect an error code not listed, contact your closest Hitachi technical support service.
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