Intesis INMBSFGL001I000 User guide

Fujitsu Air Conditioning

Compatible with Domestic and VRF line air conditioners commercialized by Fujitsu

USER MANUAL

Issue date: 05/2021 r1.3 ENGLISH

Intesis® Modbus RTU – Fujitsu User Manual r1.3 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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Gateway for the integration of a Fujitsu air conditioning unit in
ModBus RTU enabled monitoring and control systems.

Compatible with Domestic and VRF line air conditioners commercialized by Fujitsu.

ORDER CODE

LEGACY ORDER CODE

INMBSFGL001I000

FJ-AC-MBS-1

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INDEX

1 Presentation .......................................................................................................................................................... 5

2 Connection ............................................................................................................................................................ 6

Connect to the AC indoor unit ....................................................................................................................... 6

Connection to the EIA-485 bus ..................................................................................................................... 6

3 Quick Start Guide .................................................................................................................................................. 7

4 Modbus Interface Specification ............................................................................................................................. 8

Modbus physical layer ................................................................................................................................... 8

Modbus Registers ......................................................................................................................................... 8

4.2.1 Control and status registers ................................................................................................................... 8

4.2.2 Configuration Registers ....................................................................................................................... 10

4.2.3 Considerations on Temperature Registers .......................................................................................... 10

DIP-switch Configuration Interface .............................................................................................................. 12

Implemented Functions ............................................................................................................................... 14

Device LED indicator ................................................................................................................................... 14

EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................................................... 15

5 Mechanical & electrical characteristics ............................................................................................................... 16

6 AC Unit Types compatibility ................................................................................................................................ 17

7 Error codes .......................................................................................................................................................... 18

Intesis Codes ............................................................................................................................................... 18

RAC and VRF J-II / V-II / VR-II series ......................................................................................................... 18

VRF V / S / J Series .................................................................................................................................... 21

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1 Presentation

The INMBSFGL001I000 interfaces allow a complete and natural integration
of Fujitsu air conditioners into Modbus RTU (EIA-485) networks.

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 INMBSFGL001I000 devices can be connected

in the same network.

INMBSFGL001I000 is a Modbus slave device.

• Direct connection to the AC indoor unit.

• 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

INMBSFGL001I000

INMBSFGL001I000

INMBSFGL001I000

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2 Connection

The interface comes with cable + connectors for direct connection to the AC indoor unit, and with a plug-in terminal
block of 3 poles for connection to a Modbus RTU EIA-485 network.

Connect to the AC indoor unit

The INMBSFGL001I000 connects directly to the indoor unit internal control board. In the control board locate the
socket connector marked as CN65.

Figure 2.1 INMBSFGL001I000 connection diagram

Connection to the EIA-485 bus

Connect the EIA-485 bus wires to the plug-in terminal block of INMBSFGL001I000 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.

CN65

AC indoor unit

Electronic control board

200 mm / 7.9”

40 mm / 1.6”

Connection cable
provided with the
interface

90 mm / 3.5”

53 mm / 2.1”

Use this hole to
attach the cable
using the staple and
the screw provided
with the interface

Fixing screw

ModBus RTU

EIA-485

Bus

AC Unit

B A SG

EIA485

For wall mounting,
extract the upper and
lower staples until you
listen the "click".

SW1

SW2

SW3

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3 Quick Start Guide

1. Disconnect the air conditioning from 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 to CN65 between the interface and the AC indoor unit following the instructions of the diagram.

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:

By default, the interface is set to:

▪ Modbus Slave Address ➔ 1
▪ Modbus baud rate ➔ 9600 bps

These parameters can be modified from DIP-Switches (see for further information).
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.

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4 Modbus Interface Specification

Modbus physical layer

INMBSFGL001I000 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).

Modbus Registers

All registers are type “16-bit unsigned Holding Register” and they use the 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: Quiet
▪ 2: Low
▪ 3: Med
▪ 4: 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)
▪ 10: Swing

4

5

R/W

AC unit Temperature Setpoint

1,2,3,4

▪ -32768 (Initialization value)
▪ 16..30 (ºC) (0 = undetermined)
▪ 61..86 (ºF) (0 = undetermined)

5

6

R

AC unit Temperature reference

1,2,3,4

▪ 18..30 (ºC) (0 = undetermined)
▪ 64,4..86 (ºF) (0 = undetermined)
▪ 0x8000 There is no temperature sent from the Remote

controller

6

7

R/W

Window Contact

▪ 0: Closed (Default)
▪ 1: Open

7

8

R/W

INMBSFGL001I000 Disablement 5

▪ 0: INMBSFGL001I000 enabled (Default value)
▪ 1: INMBSFGL001I000 disabled

8

9

R/W

AC Remote Control Disablement 5

▪ 0: Remote Control enabled (Default value)
▪ 1: Remote Control disabled

9

10

R/W

AC unit Operation Time

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.

3

It is not possible turn to x10 the value shown in Fahrenheit.

4

See section 4.2.3 CONSIDERATIONS ON TEMPERATURE REGISTERS for more information

5

This value is stored in non-volatile memory

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Register Address

(protocol address)

Register Address

(PLC address)

R/W

Description

▪ 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 6

▪ 0: No error present
▪ 65535(-1 if it is read as signed value): Error in the

communication of INMBSFGL001I000 or Remote
Controller with the AC unit.

▪ Any other value, see the table at the end of this

document.

22

23

R/W

Indoor unit´s ambient temperature from external
sensor (at Modbus side)

1,2,3,4

▪ -32768: (Initialization value). No temperature is being

provided from an external sensor.

▪ Any other: (ºC/x10ºC/ºF)

23

24

R

AC Real temperature setpoint

1,2,3,4

▪ 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..92ºF

24

25

R

Current AC max setpoint

1,2,3

▪ -32768 (Initialization value)
▪ Ranges are specific from Manufacturer

25

26

R

Current AC min setpoint

1,2,3

▪ -32768 (Initialization value)
▪ Ranges are specific from Manufacturer

26

27

R/W

AC unit Horizontal Vane Position 1

▪ 0: Auto (Default)
▪ 1: Position 1
▪ …
▪ 5: Position 5
▪ 10: Swing

31

32

R

Window status (feedback)

▪ 0: Not active (Default value)
▪ 1: Active (Window is open)

36

37

R/W

External On/Off disablement:

▪ 0: Not active (Default value)
▪ 1: Active

40

41

R

Window contact ON/OFF disablement:

▪ 0: Window contact is disabled (not working)
▪ 1: Window contact is enabled (in use)

43

44

W

Filter reset:

▪ 1: Reset

44

45

R

Filter status

▪ 0: Off
▪ 1: Lit

56

57

R/W

Antifreeze operation

▪ 0: Disabled
▪ 1: Enabled

64

65

R/W

Economy

▪ 0: Disabled
▪ 1: Enabled

65

66

R

Input reference temperature

1,2,3

6

See section 7 ERROR CODES for possible error codes and their explanation

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Register Address

(protocol address)

Register Address

(PLC address)

R/W

Description

▪ 0x8000: No temperature’s value is being provided from

an external sensor. No virtual temperature is being
applied.

▪ Any other: (ºC/x10ºC/ºF)

66

67

R

Return path temperature

1,2,3

▪ -32768 (Initialization value)
▪ Ranges are specific from Manufacturer

97

98

R/W

Block Periodic Sendings

5,7

▪ 0: Non-blocked (Default value)
▪ 1: Blocked

98

99

R

Master/Slave (gateway’s role)

▪ 0: Slave
▪ 1: Master

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 8

▪ 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

49

50

R

Device ID: 0x0D00

50

51

R

Software version

99

100

W

Reset

▪ 1: Reset

4.2.3 Considerations on Temperature Registers

• AC unit Temperature Setpoint (R/W) (register 5 – in PLC addressing): This is the adjustable temperature
setpoint meant to be required by the user. This register can be read (Modbus function 3 or 4) or written
(modbus functions 5 or 16). A remote controller connected to the 3-wire bus of the Fujitsu indoor unit will
report the same temperature setpoint value as this register.

• AC unit external reference temperature (R/W) (register 23 – in PLC addressing): This register allows
providing an external temperature reference from Modbus side. If an external temperature is provided
through this register, indoor unit will use it as reference for its temperature control loop.

o This register will have no effect in those Fujitsu RAC / domestic line splits Air-Conditioning units –

this is, those models requiring an additional communication accessory enabling communication with
INMBSFGL001I000.

o For this temperature to take effect it is required that the Fujitsu AC indoor unit is configured in such

a way that it uses the “thermostat sensor in the remote controller” (this is, INMBSFGL001I000 will
act as thermostat sensor providing a temperature sensor reading).

7

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.

8

Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.

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o This configuration is done via a Fujitsu remote controller connected to the indoor unit (Function

number “42” – setting value “1” / operation of Thermosensor button) and must be done by Fujitsu
authorized installers at the time of the installation of the AC.

o Register value after INMBSFGL001I000 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.

o Virtual temperature mechanism will be activated once the first temperature value is received on

register 23 – in PLC addressing:

SAC = Su – (Tu – SU)

Where:
SAC - setpoint value currently applied to the indoor unit
Su - setpoint value
Tu - external temperature reference written at BACnet side

When INMBSFGL001I000 detects a change in any of the values of {Su, Tu}, it will send the new
setpoint (SAC) to 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 sectin 4.3 for details). 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).

• Tenths of 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).

NOTE

• Fujitsu General cannot guarantee the Room Temperature object value is consistently equal to the current
actual room temperature.

• The Room Temperature is only allowed for displaying, it cannot be used for controlling other equipment.

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DIP-switch Configuration Interface

All the configuration values on INMBSFGL001I000 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, SW2 and SW3 on the following locations:

*Consider OFF as

The following tables apply to the interface´s configuration through DIP-switches:

SW1 – AC configuration + Modbus baud rate

AC Configuration

Modbus Baud rate

SW1-P1…5

Description

SW1-P6..8

Description

Not used (default
value)

Low Power mode
(default value)

2400bps

Not used

High Performance
mode

4800bps

Not used (default value)

9600bps (Default
value)

Not used

19200bps

Not used (default value)

38400bps

Not used

57600bps

Not used (default value)

76800bps

Not used

115200bps

Table 4.1 SW1: AC Configuration + Modbus baud rate

SW1

B A SG

EIA 485

SW3

SW2

ON ON

ON

SW1

1 2 3

1 2 3 4 5 6 7 8

SW3

SW2

ON

ON

ON

ON

ON

1 2 3 4 5 6 7 8

AC Unit

L1 L2

AC Unit

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

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SW2 – Modbus Slave address + Degrees/tenths of degrees (x10) + Temp. magnitude (ºC/ºF)

Table 4.2 SW2: Modbus slave address

Table 4.3 SW2: Degrees / tenths of degrees (x10) + Temperature magnitude (ºC/ºF)

Add SW2-P1..6

Add SW2-P1..6

Add SW2-P1..6

Add SW2-P1..6

Add SW2-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

SW2-P7-8

Description

Temperature values in ModBus register are represented in degrees (x1) (default value)

Temperature values in ModBus register are represented in tenths of degrees (x10)

Temperature values in ModBus register are represented in Celsius degrees (default value)

Temperature values in ModBus register are represented in Fahrenheit degrees

ON SAB

ON SAB

ON SAB

ON SAB

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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SW3 – Termination resistor + BUS polarization configuration

Table 4.4 SW3: Temperature and termination resistor configuration

Implemented Functions

INMBSPAN001R000 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)

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

EEPROM failure

SW3-P1..3

Description

EIA-485 bus without termination resistor (Default value).

Internal termination resistor of 120Ω connected to EIA-485 bus.

No BUS polarization (default value).

BUS polarization active.

ON

ON

ON

ON

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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.
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 INMBSFGL001I000 device includes an on-board terminator resistor of 120Ω that can be connected to the EIA­485 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 Mechanical & electrical characteristics

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 +70ºC

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: 0.5mm

2

… 2.5mm

2

2 cores: 0.5mm

2

… 1.5mm

2

3 cores: not permitted

Stock Humidity

<95% RH, non-condensing

ModBus RTU port

1 x EIA485 Plug-in screw terminal block (2 poles +

GND) with 120 Ω resistor termination and

polatization selectable by switch.

Isolation voltage

1500 VDC

AC unit port

1 x Specific connector
Specific cable included

Isolation resistance

1000 MΩ

Switch 1
(SW1)

1 x DIP-Switch for Air Conditioner Unit + ModBus
baud rate

Protection

IP20

Switch 3
(SW3)

1 x DIP-Switch for ModBus RTU slave address +
temperature magnitude (ºC/ºF) and scale (x1/x10).

LED indicators

2 x Onboard LED - Operational status

53 mm

93 mm

58 mm

AC Unit

connection

DIP

Switch SW3

LED

Indicator

DIP

Switch SW1

DIP

Switch SW2

ModBus RTU Port

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6 AC Unit Types compatibility

Please, check compatibility list at to know which Fujitsu units are compatible with our gateway.

https://www.intesis.com/docs/compatibilities/inxxxfgl001i000_compatibility

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7 Error codes

Intesis Codes

Error Code

Modbus

Error in
Remote

Controller

Error Description

0

N/A

No active error

65535

(-1)

N/A

Error in the communication of INMBSFGL001I000 or Remote Controller with the AC
unit

RAC and VRF J-II / V-II / VR-II series

Error Code

Modbus

Error in
Remote

Controller

System

Error Description

0

00

Wired remote controller error

1

01

Indoor signal error

2

02

Indoor room temperature sensor error

3

03

Indoor room temperature sensor error

4

04

Indoor heat exchanger temperature sensor (middle) error

5

05

Indoor heat exchanger temperature sensor (middle) error

6

06

Outdoor heat exchanger temperature sensor (outlet) error

7

07

Outdoor heat exchanger temperature sensor (outlet) error

8

08

Power voltage error

9

09

Float switch operated

10

0A

Outdoor temperature sensor error

11

0b

Outdoor temperature sensor error

12

0C

Outdoor discharge pipe temperature sensor error

13

0d

Outdoor discharge pipe temperature sensor error

14

0E

Heat sink thermistor (Inverter) error

15

0F

Discharge temperature error

17

11

Indoor unit EEPROM error

18

12

Indoor fan error

19

13

Indoor signal error

20

14

Outdoor EEPROM error

21

15

RAC

Compressor temperature sensor error

22

16

Inverter and

Pressure switch abnormal, Pressure sensor error

23

17

Non Inverter

IPM protection

24

18

CT error

25

19

Active filter error

INV voltage protection

26

1A

Compressor location error

27

1b

Outdoor fan error

28

1C

Outdoor unit computer communication error

29

1d

2-way valve temperature sensor error

30

1E

3-way valve temperature sensor error

31

1F

Connected indoor unit error

32

20

Indoor MANUAL AUTO switch error

33

21

reverse VDD permanent stop protection

34

22

VDD permanent stop protection

36

24

Excessive high pressure protection on cooling

37

25

P.F.C. circuit error

38

26

Indoor signal error

39

27

Indoor signal error

40

28

Indoor heat exchanger temperature sensor (inlet) error

41

29

Outdoor heat exchanger temperature sensor (middle) error

42

2A

Power supply frequency detection error

43

2b

Compressor temperature error

44

2C

4-way valve error

Intesis® Modbus RTU – Fujitsu User Manual r1.3 EN

© HMS Industrial Networks S.L.U - All rights reserved

This information is subject to change without notice

URL https://www.intesis.com

19 / 21

Error Code

Modbus

Error in
Remote

Controller

System

Error Description

45

2d

Heat sink thermistor P.F.C. error

46

2E

Indoor unit damper error

Inverter error

47

2F

RAC

Low pressure error

48

30

Inverter and

Refrigerant circuit address set-up error

49

31

Non Inverter

Master unit, Slave unit set-up error

50

32

Connected the indoor number set-up error

51

33

P.F.C. printed circuit board error

52

34

Indoor fan 2 error

53

35

Control box thermistor error

54

36

Indoor unit CT error

55

37

Indoor fan motor 1 driving circuit error

56

38

Indoor fan motor 2 driving circuit error

117

11

Serial communication error between indoor/outdoor units

118

12

Remote controller communication error

119

13

Communication error between outdoor units

120

14

Network communication error

121

15

Scan error

122

16

Peripheral unit communication error

123

17

Electricity charge apportionment error

133

21

Indoor unit initial setting error

134

22

Indoor unit capacity abnormal

135

23

Incompatible series connection error

136

24

Connection unit number error

137

25

Connection pipe length error

138

26

RAC

Indoor unit address setting error

139

27

Inverter

Master/slave unit setting error

140

28

Models G

Other setting error

141

29

series

Connection unit number error in wired remote controller system

149

31

Indoor unit power supply abnormal

150

32

VRF

Indoor unit main PCB error

151

33

J-II/V-II/VR-II

Indoor unit display PCB error

152

34

Series

Power relay error

153

35

Indoor unit manual auto switch error

154

36

Heater relay error

155

37

Indoor unit transmission PCB error

156

38

Network convertor PCB error

157

39

Indoor unit power supply circuit error

158

3A

Indoor unit communication circuit (wired remote controller) error

165

41

Indoor unit room temp. thermistor error

166

42

Indoor unit heat ex. temp. thermistor error

167

43

Humidity sensor error

168

44

Light sensor error

169

45

Gas sensor error

170

46

Float sensor error

171

47

Water temperature sensor error

172

48

Warm water flow rate sensor error

173

49

Heater sensor error

181

51

Indoor unit fan motor 1 error

182

52

Indoor unit coil (expansion valve) error

183

53

Indoor unit water drain abnormal

184

54

Air cleaning function error

185

55

Filter cleaning function error

186

56

Water circulation pump error

187

57

Indoor unit damper error

188

58

Indoor unit intake grille position error

189

59

Indoor unit fan motor 2 error

Intesis® Modbus RTU – Fujitsu User Manual r1.3 EN

© HMS Industrial Networks S.L.U - All rights reserved

This information is subject to change without notice

URL https://www.intesis.com

20 / 21

Error Code

Modbus

Error in
Remote

Controller

System

Error Description

195

5U

Indoor unit miscellaneous error

197

61

Outdoor unit power supply abnormal

198

62

Outdoor unit main PCB error

199

63

Outdoor unit inverter PCB error

200

64

Outdoor unit active filter/PFC circuit error

201

65

Outdoor unit IPM error

202

66

Convertor distinction error

203

67

Outdoor unit power short interruption error (protective operation)

204

68

Outdoor unit magnetic relay error

205

69

Outdoor unit transmission PCB error

206

6A

Outdoor unit display PCB error

213

71

Outdoor unit discharge temp. thermistor error

214

72

Outdoor unit compressor temp. thermistor error

215

73

Outdoor unit heat ex. temp. thermistor error

216

74

Outside air temp. thermistor error

217

75

Outdoor unit suction gas temp. thermistor error

218

76

Outdoor unit operating valve thermistor error

219

77

Outdoor unit heat sink temp. thermistor error

220

78

Expansion valve temperature sensor error

229

81

Receiver liquid level detection sensor error

230

82

Outdoor unit sub-cool heat ex. gas temp. thermistor error

231

83

Outdoor unit liquid pipe temp. thermistor error

232

84

RAC

Outdoor unit current sensor error

233

85

Inverter

Fan motor current sensor error

234

86

Models G

Outdoor unit pressure sensor error

235

87

series

Oil sensor error

245

91

Outdoor unit compressor 1 error

246

92

Outdoor unit compressor 2 error

247

93

VRF

Outdoor unit compressor start up error

248

94

J-II/V-II/VR-II

Outdoor unit trip detection

249

95

Series

Outdoor unit compressor motor control error

250

96

Open loop error (Field-weakening relevant)

251

97

Outdoor unit fan motor 1 error

252

98

Outdoor unit fan motor 2 error

253

99

Outdoor unit 4-way valve error

254

9A

Outdoor unit coil (expansion valve) error

259

9U

Outdoor unit miscellaneous error

261

A1

Outdoor unit discharge temperature 1 error

262

A2

Outdoor unit discharge temperature 2 error

263

A3

Outdoor unit compressor temperature error

264

A4

Outdoor unit pressure error 1

265

A5

Outdoor unit pressure error 2

266

A6

Outdoor unit heat exchanger temperature error

267

A7

Suction temperature abnormal

268

A8

Poor refrigerant circulation

269

A9

Current overload error

270

AA

Outdoor unit special operation error

271

AC

Ambient temperature error

272

AF

Out of the possible operation range

273

AJ

Freeze protection operated

277

C1

Peripheral unit main PCB error

278

C2

Peripheral unit transmission PCB error

279

C3

Peripheral unit PCB 1 error

280

C4

PCB 2 error

281

C5

PCB 3 error

282

C6

PCB 4 error

283

C7

PCB 5 error

Intesis® Modbus RTU – Fujitsu User Manual r1.3 EN

© HMS Industrial Networks S.L.U - All rights reserved

This information is subject to change without notice

URL https://www.intesis.com

21 / 21

Error Code

Modbus

Error in
Remote

Controller

System

Error Description

284

C8

Peripheral unit input device error

285

C9

Display device error

286

CA

EEPROM error

287

CC

Peripheral unit sensor error

288

CF

Peripheral unit external connector error (USB memory)

289

CJ

Other parts error

293

F1

RAC

System tool software error

294

F2

Inverter

System tool adaptor error

295

F3

Models G

System tool interface error

296

F4

series

System tool environment error

309

J1

RB unit error

310

J2

Branch boxes error

311

J3

VRF

Total heat exchanging, ventilation unit error

312

J4

J-II/V-II/VR-II

Domestic hot water unit error

313

J5

Series

Zone control interface error

VRF V / S / J Series

Error Code

Modbus

Error in
Remote

Controller

System

Error Description

0

00

No Error 2 02

Model information Error

4

04

Power frequency Error

6

06

VRF

EEPROM access Error

7

07

V / S / J

EEPROM deletion Error

9

09

Series

Room sensor Error

10

0A

Heat Ex. Middle Sensor Error

11

0b

Heat Ex. Inlet sensor Error

12

0C

Heat Ex. Outlet sensor Error

13

0d

Blower temperature thermistor Error

17

11

Drain Error

18

12

Room temperature Error

19

13

Indoor fan motor Error

20

18

VRF

Standard wired remote Error

V / S / J

Standard wired token Error

31

1F

Series

Network communication Error

32

20

Node setting error

33

21

Communication Error between Main PCB & Transmission PCB

34

32

Outdoor unit Error

In case you detect an error code not listed, contact your nearest Fujitsu technical support service for more information
on the error meaning.