FUJITSU Modbus RTU RAC and VRF System User Manual

**FUJITSU Modbus RTU RAC and VRF System User Manual

**

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.

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.

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.

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.

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.

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).

7. NOTE: All changes on the DIP-Switch configuration require a system power cycle to be applied.

8. Connect the AC system to Mains Power.
   IMPORTANT: The Intesis interface requires to be connected to the AC unit (powered) to start communicating.

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.

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, 2§   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 1,3,4,5§   -32768 (Initialization value)§   16..30 (ºC) (0 = undetermined)§   61..86 (ºF) (0 = undetermined)
5| 6| R| AC unit Temperature reference 1,3,4,4§   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 6§   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

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. Number of FanSpeeds configurable via DIP-Switches.
3. Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
4. It is not possible turn to x10 the value shown in Fahrenheit.
5. See section 4.2.3 CONSIDERATIONS ON TEMPERATURE REGISTERS for more information
6. This value is stored in non-volatile memory.

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
9| 10| R/W| AC unit Operation Time§   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 7§   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.
21| 22| R| Number of FanSpeeds§   3…6 FanSpeeds
22| 23| R/W| Indoor unit´s ambient temperature from external sensor (at Modbus side) 1,3,4,4§   -32768: (Initialization value). No temperature is being provided from an external sensor.§   Any other: (ºC/x10ºC/ºF)
23| 24| R| AC Real temperature setpoint 1,3,4,4§   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 1,3,4§   -32768 (Initialization value)§ Ranges are specific from Manufacturer
25| 26| R| Current AC min setpoint 1,3,4§   -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

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

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
| | | §   1: Enabled
65| 66| R| Input reference temperature 1,3,4§   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 1,3,4§   -32768 (Initialization value)§ Ranges are specific from Manufacturer
97| 98| R/W| Block Periodic Sendings 5,8§   0: Non-blocked (Default value)§ 1: Blocked
98| 99| R| Master/Slave (gateway’s role)§   0: Slave§   1: Master

Configuration Registers

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
13| 14| R/W| “Open Window” switch-off timeout 9§   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

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 willreport 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.

  • 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.
  • 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).
  • 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.
  • 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.
  • 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.

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:

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

SW1 – AC configuration + Modbus baud rate

Table 4.1 SW1: AC Configuration + Modbus baud rate

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

Table 4.2 SW2: Modbus slave address

in degrees (x1) (default value)
x| x| x| x| x| x| ­| x| Temperature values in ModBus register are represented in tenths of degrees (x10)
x| x| x| x| x| x| x| ¯| Temperature values in ModBus register are represented in Celsius degrees (default value)
x| x| x| x| x| x| x| ­ | Temperature values in ModBus register are represented in Fahrenheit degrees

SW3 – Termination resistor + BUS polarization configuration

bus.
x| | | No BUS polarization (Default value).
x| ­| ­| BUS polarization active.

Implemented Functions

INMBSPAN001R000 implements the following standard Modbus functions:

• : 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

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).

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| WallDIN 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 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

DIMENSIONS

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

Error 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
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
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
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.

References

• Intesis | Gateway solutions for Building Automation
• intesis.com/docs/compatibilities/inxxxfgl001i000_compatibility

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