Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual & troubleshooting

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 1

Modbus PTV [EIA-485] Interface for
Toshiba air conditioners

Compatible with Digital Inverter & VRF lines

USER MANUAL
Issue date: 04/2019 r2.7 ENGLISH

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 2

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 3

Modbus RTU (EIA-485) Interface for Toshiba air conditioners Compatible with Digital Inverter & VRF lines

ORDER CODE LEGACY ORDER CODE
INMBSTOS001R000 TO-RC-MBS-1

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 the 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 of 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.

Presentation

The INMBSTOS001R000 interfaces allow complete and natural integration of Toshiba air conditioners into Modbus RTU (EIA-485) networks.
Compatible with Digital Inverter & VRF lines. Reduced dimensions.
93 x 53 x 58 mm
3.7” x 2.1” x 2.3”Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 4

  • Quick and easy installation.
    Mountable on DIN rail, wall, or even inside the indoor unit of AC.
  • External power is not required.
  • Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSTOS001R000 devices can be connected to the same network.
    INMBSTOS001R000 is a Modbus slave device.
  • Direct connection to the AC indoor unit. Up to 16 AC indoor units can be connected to INMBSTOS001R000, 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.

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 5

* 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 a plug-in terminal block of 2 poles to establish a direct connection with the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish a direct connection with the Modbus RTU EIA-485 network.

Connect to the AC indoor unit

The INMBSTOS001R000 connects directly to the Toshiba AB Bus, which is not provided within the interface. The recommended connection’ methods are the following ones  (details in Figure 2. 1):

  • Wired remote control available.
  • No remote control is available

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 to the same bus, communication may shut down.

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 6

Figure 2. 1 ,INMBSTOS001R000 connection diagram

Connection to the EIA-485 bus

Connect the EIA-485 bus wires to the plug-in terminal block of INMBSTOS001R000 and keep the polarity on this connection (A+ and B-). Make sure that the maximum distance to the bus is 1,200 meters (3,937 ft). Loop or star typologies are not allowed in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 4.7 for more details).

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 4.4).

By default, the interface is set to:

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 7

▪ 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 a low level (Off positionIntesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 8) 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.

Modbus Interface Specification

Modbus physical layer

INMBSTOS001R000 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485 line. It performs 8N2 communication (8 data bits, no parity, and 2 stop bit) with several available baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800 bps, and 115200 bps). It also supports 8N1 communication (8 data bits, no parity, and 1 stop bit).

4.2 Modbus Registers

All registers are type “16-bit unsigned Holding Register” and they use the Modbus big-endian notation.

4.2.1 Control and status registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W Description
0 1 R/W AC unit On/Off
♦ 0: Off
♦ 1: On
1 2 R/W AC unit Mode 1
♦ 0: Auto
♦ 1: Heat
♦ 2: Dry
♦3: Fan
♦4: Cool
2 3 R/W AC unit Fan Speed 1
0: Auto
♦ 1: Low
♦ 2: Mid
♦ 3: High
3 4 R/W AC unit Vane Position 1
♦1: POS1 (Horizontal)
♦ 2: POS2 (Horizontal)
♦ 3: POS3 (Medium)
♦ 4: POS4 (Vertical)
♦ 5: POSS (Vertical)
♦ 6: POS6
♦7: POS7
♦ 10: Swing
4 5 R/W AC unit Temperature Setpoint 1,2,3
♦ -32768 (Initialization value)
♦16..320C (0C/x100C)
♦ 61..900F
  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. The magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default), or Fahrenheit. See section 4.3.6 for more information.
  3. It is not possible to turn to x10 the value shown in Fahrenheit.
Register Address
(protocol address)
Register Address
(PLC address)
R/W Description
5 6 R/W AC unit Temperature reference 1.2,3

· 32768: Initial value. Value invalid, which comes from the IU’s sensor. If the value that is shown in register 22 (23 PLC) is valid, the address is going to take this value.
· Ranges are specific from Manufacturer (°C/×10°C/°F)

6 7 R/W Window Contact
· 0: Closed (Default)
· 1: Open
7 8 R/W INMBSTOS001R000 Disablement 4
· 0: INMBSTOS001R000 enabled (Default)
·1: INMBSTOS001R000 disabled
3 9 R/W AC Remote Control Disablement 4
·0: Remote Control enabled (Default)
·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 s
·0: No Error active
·65535 (-1): Error in the communication of INMBSTOS001R000 with the AC indoor 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: (°C/×10°C/°F)

23

24 R AC Real temperature setpoint 1236
There’s no Virtual Temperature. The value equals to the value of register 5 (6 PLC). The value which is introduced by the user is the one that the machine uses (the external sensor is able to write directly over the machine to do this operation).
·Ranges are specific from Manufacturer  (°C/×10°C/°F)
97 98 R/W Block Periodic Sendings 4178

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

4 . This value is stored in non-volatile memory
5. See section 7 for possible error codes and their explanation
6. See section 4.3.6 for more information
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. This register applies to firmware version 2.3 onwards

4.2.2 Configuration Registers

Register Address
(protocol address)13
Register Address
(PLC address)14
R/W
R/W
Description

“Open Window” switch-off timeout 9

· 0..30 (minutes)

·  Factory setting: 30 (minutes)

14 15 R Modbus RTU baud-rate 10

· 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
49 50 R Device ID: Ox1F00
50 51 R Software version

While the initialization is ongoing, some Modbus registers indicate an undetermined value. Once the normal operation starts, they acquire its corresponding value. It is important to keep in mind that any change done during the initialization process will not have effect until it has been finished.

4.3 Modbus Registers for Advanced Functions

4.3.1 Advanced registers for Indoor Unit status

These registers are only available when the indoor unit’s type selected on SW1 is different from the default value. Please, check the Section 4.4 for more information.

NOTE: IU stands for Indoor Unit’s Index

Register Address
(Protocol address)
Register Address
(PLC address)
R/W  Description  Priority 
(IU – 1) * 25 + 4000 (IU – 1) * 25 + 4001 R Indoor Unit exist
▪ 0: Doesn’t exist
▪ 1: Exist
0
(IU – 1) * 25 + 4001 (IU – 1) * 25 + 4002 R Indoor Unit address
▪ MSB – OU address ; LSB – IU
address
0
(IU – 1) * 25 + 4002 (IU – 1) * 25 + 4003 R Indoor Unit duty
▪ 0..15
1
(IU – 1) * 25 + 4003 (IU – 1) * 25 + 4004 R Indoor Unit defrost
▪ 0: Off
▪ 1: On
1

9. Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.
10. The range 38400bps-115200bps applies to firmware version 2.3 onwards

Register Address
(Protocol address)
Register Address
(PLC address)
R/W Description Priority
(IU – 1) * 25 + 4004 (IU – 1) * 25 + 4005 R Indoor Unit filter alarm
▪ 0: No alarm
▪ 1: Alarm
1
(IU – 1) * 25 + 4005 (IU – 1) * 25 + 4006 R Indoor Unit 11hermos ON.
▪ 0: Cool
▪ 1: Heat
1
(IU – 1) * 25 + 4010 (IU – 1) * 25 + 4011 R Room temperature (During
Control)
▪ x1 ºC
2
(IU – 1) * 25 + 4011 (IU – 1) * 25 + 4012 R Room temperature (Remote
Controller)
▪ x1 ºC
2
(IU – 1) * 25 + 4012 (IU – 1) * 25 + 4013 R Indoor suction temperature (TA)
▪ x1 ºC
1
(IU – 1) * 25 + 4013 (IU – 1) * 25 + 4014 R Indoor fan coil temperature (TCJ)
▪ x1 ºC
1
(IU – 1) * 25 + 4014 (IU – 1) * 25 + 4015 R Indoor fan coil temperature
(TC2)
▪ x1 ºC
1
(IU – 1) * 25 + 4015 (IU – 1) * 25 + 4016 R Indoor fan coil temperature
(TC1)
▪ x1 ºC
1
(IU – 1) * 25 + 4016 (IU – 1) * 25 + 4017 R Indoor discharge temperature
(TF)
▪ x1 ºC
▪ Only for VRF systems
0
(IU – 1) * 25 + 4017 (IU – 1) * 25 + 4018 R Revolutions indoor fan
▪ RPS
▪ Only for RAV systems
0
(IU – 1) * 25 + 4018 (IU – 1) * 25 + 4019 R Indoor PMV opening
▪ x1, x10 Pulses
▪ Only for VRF systems
1
(IU – 1) * 25 + 4019 (IU – 1) * 25 + 4020 R Running hours indoor fan
▪ x100 hours
▪ Only for RAV systems
0
(IU – 1) * 25 + 4020 (IU – 1) * 25 + 4021 R Time filtersign
▪ Hours
▪ Only for RAV systems
0
(IU – 1) * 25 + 4021 (IU – 1) * 25 + 4022 R Estimated supply air temperature
▪ x1 ºC
▪ Only for RAV systems
0

4.3.2 Advanced registers for Outdoor Unit Status on VRF-SMMSi Systems

These registers are only available when the indoor unit’s type selected on SW1 is different from the default value. Please, check section 4.4 for more information.

Register Address
(protocol address)
Register Address
(PLC address)
R/W Description Priority
4200 4201 R Outdoor Unit duty
▪ 15
1
Register Address
(Protocol address)
Register Address
(PLC address)
R/W Description Priority
4210 4211 R High-pressure sensor detention
pressure (Pd)
▪ X100 Mpa
2
4211 4212 R Low-pressure sensor detention
pressure (Ps)
▪ X100 Mpa
2
4212 4213 R Compressor  1 discharge temperature  (Td1)
▪ x1 ºC
2
4213 4214 R Compressor  2 discharge  temperature (Td2)  ▪ x1 ºC 2
4214 4215 R Compressor
3 discharge
temperature (Td3)
▪ x1 ºC
2
4215 4216 R Suction temperature (TS)
▪ x1 ºC
2
4216 4217 R Outdoor fan coil temperature 1
(TE1)
▪ x1 ºC
2
4217 4218 R Outdoor fan coil temperature 2(TE2)
▪ x1 ºC
1
4218 4219 R Temperature at liquid side (TL)
▪ x1 ºC
2
4219 4220 R Outside ambient temperature
(TO)
▪ x1 ºC
1
4220 4221 R PMV1 + 2 opening
▪ x1 Pulse
2
4221 4222 R PMV4 opening
▪ x1 Pulse
2
4222 4223 R Compressor 1 current (I1)
▪ x10 A
1
4223 4224 R Compressor 2 current (I2)
▪ x10 A
2
4224 4225 R Compressor 3 current (I3)
▪ x10 A
2
4225 4226 R Outdoor fan current (Ifan)
▪ x10 A
2
4226 4227 R Compressor 1 revolutions
▪ x10 RPS
2
4227 4228 R Compressor 2 revolutions
▪ x10 RPS
2
4228 4229 R Compressor 3 revolutions
▪ x10 RPS
2
4229 4230 R Outdoor fan mode
▪ x1 mode
2
4230 4231 R Compressor IPDU 1 heat sink
temperature
▪ x1 ºC
2
4231 4232 R Compressor IPDU 2 heat sink
temperature
▪ x1 ºC
2
4232 4233 R Compressor IPDU 3 heat sink
temperature
▪ x1 ºC
2
4233 4234 R Outdoor fan IPDU heat sink
temperature
▪ x1 ºC
2
4234 4235 R Heating/cooling
recovery
controlled ∗5
▪ 0: Normal
▪ 1: Recovery controlled
2
4235 4236 R Pressure release ∗5
▪ 0: Normal
▪ 1: Recovery controlled
2
4236 4237 R Discharge temperature release ∗5
▪ 0: Normal
▪ 1: Recovery controlled
2
4237 4238 R Follower unit release (U2/U2/U4outdoor units) ∗5
▪ 0: Normal
▪ 1: Recovery controlled
2
4238 4239 R Outdoor unit horsepower
▪ x1 HP
0

4.3.3 Advanced registers for Outdoor Unit Status on VRF-SHRM/SMMS Systems

These registers are only available when the indoor unit’s type selected on SW1 is different from the default value. Please, check section 4.4 for more information

Register Address
(protocol address)
Register Address
(PLC address)
R/W Description Priority
4200 4201 R Outdoor Unit duty

▪ 15

1
4210 4211 R Tdl-Compressor 1 Discharge Temp.

▪ x1 ºC

2
4211 4212 R Td2-Compressor 2 Discharge Temp.

▪ x1 ºC

2
4212 4213 R Pd – High Pressure Sensor

▪ Mpa

2
4213 4214 R PS – Low Pressure Sensor

▪ Mpa

2
4214 4215 R TS – Suction Temp.

▪ x1 ºC

2
4215 4216 R TE – Outdoor Heat Exchanger Temp.

▪ x1 ºC

2
4216 4217 R TL – Liquid Temp.

▪ x1 ºC

2
4217 4218 R TO – Outside ambient temperature

▪ x1 ºC

1
4218 4219 R TU – Low Pressure Saturated Temp.

▪ x1 ºC

2
Register Address
(protocol address)
Register Address
(PLC address)
R/W Description Priority
4219 4220 R Compressor 1 Current
▪ A
1
4220 4211 R Compressor 2 Current
▪ A
2
4221 4222 R PMV1 + 2 Opening
▪ 0..100
2
4223 4224 R Compressor 1, 2
▪ 0: Off
▪ 1: On
2
4224 4225 R Outdoor Fan Mode
▪ 0..31
2
4225 4226 R Outdoor Unit Size
▪ HP
2

4.3.4 Advanced registers for Outdoor Unit Status on RAV Systems

These registers are only available when the indoor unit’s type selected on SW1 is different from the default value. Please, check section 4.4 for more information

Register Address
(protocol address)
Register Address
(PLC address)
R/W Description Priority
4400 4401 R Outdoor Unit duty

▪ 0..15

1
4410 4411 R TE temperature (evaporator)

▪ x1 ºC

2
4411 4412 R TO temperature outdoor

▪ x1 ºC

1
4412 4413 R Compressor              discharge

temperature

▪ x1 ºC

2
4413 4414 R Suction temperature TS

x1 ºC

2
4414 4415 R Temperature thyristor THS

▪ x1 ºC

0
4415 4416 R Compressor current

▪ A

1
4416 4417 R Temperature at liquid side TL

▪ x1 ºC

2
4417 4418 R CompreRpsssor revolutions

▪ RPS

2
4418 4419 R Revolutions lowest Fan

▪ RPS

0
4419 4420 R Revolutions upper Fan

▪ RPS

0
4420 4221 R Running hours compressor

▪ x100 hours

2

4.3.5 Advanced registers for Indoor Unit Type and Refresh Time adjustment

Register Address
(protocol address)
Register Address
(PLC address)
R/W Description Priority
4450 4451 R Indoor Unit Type
▪ 0: Not defined (extra signals
disabled)
▪ 1: RAV
▪ 2: VRF (SMMSi)
▪ 3: VRF (SHRM/SMMS)
0
4451 4452 R/W Refresh Time Adjust
▪ 1..4

This parameter indicates the cadence when reading priority signals. Priorities are defined as follows and can’t be modified:

0: Update on start-up

  1. High priority
  2. Low priority

The higher the value, the fastest the priority signals are going to update. The cadence is defined by:

  • One high priority signal and one low priority signal’s poll.
  • Two high-priority signals and one low-priority signal’s poll.
  • Three high-priority signals and one low-priority signal’s poll.
  • Four high-priority signals and one low-priority signal’s poll.

4.3.6 Considerations on Temperature Registers

  • AC unit temperature setpoint (R/W)
    (register 4 – in Protocol address / register 5 – in PLC address):
    This is the adjustable temperature setpoint value that must be required by the user.
    This register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16). A remote controller connected to the Toshiba indoor unit will report the same temperature setpoint value as this register.
  • AC unit temperature reference (R)
    (register 5 – in Protocol address / register 6 – in PLC address):
  • This register reports the temperature that is currently used by the Toshiba indoor unit as the reference of its own control loop.
    If the value on the register 22 is valid (different from 0x8000), it will report the value from this register. If not, it will show the indoor unit reference temperature.
    It is a read-only register (Modbus functions 3 or 4).
    Depending on the mode selected, the register shows a different value:
    Heat Mode:
    Temperature reference = Ambient temperature +0.50C
    Dry Mode / Fan Mode / Cool mode:
    Temperature reference = Ambient temperature -0.50C
    When the mode changes from Heat to anyone else, or from anyone else to Heat, the register updates the value using the intervals +0.5°C/-0.5°C
  • AC unit external temperature reference (Modbus) (R/W)
    (register 22 – in Protocol address / register 23 – in PLC address):
    This register reports the temperature from an external sensor in the Modbus side. If valid value is received, the Modbus register will indicate a 0x8000 value.
    This register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16).
  • AC Real temperature setpoint (R)
    (register 23 – In Protocol address / register 24 – in PLC address):
    This register will show the same value as in register 4 (protocol address). The reference temperature from the remote controller is sent directly to the AC unit to be applied in the control loop.
    It is a read-only register (Modbus functions 3 or 4).
    Moreover, notice that temperature’s values of all these four registers are expressed according to the temperature´s format configured through its onboard DIP-Switches (See “4.4 -DIP-switch Configuration Interface”). The 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).

4.4 DIP-switch Configuration Interface

All the configuration values on INMBSTOS001R000 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:
Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 9

The following tables apply to the interface´s configuration through DIP-switches:
SW1 – AC indoor unit’s features

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 10

Table 4.1 SW1: AC indoor unit´s features

SW3/SW4 – Baud rate configuration
Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 11

Table 4.2 SW3-SW4: Modbus baud rate

SW4 – Degrees/Decidegrees (x10), temperature magnitude (ºC/ºF), and EIA-485 termination resistor.Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 12

Table 4.3 SW4: Temperature and termination resistor configuration

SW3 – Modbus Slave addressIntesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 13

Table 4.4 SW3: Modbus slave address

4.5 Implemented Functions

INMBSTOS001R000 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 the length field should always be 1 when this function is being used in case of writing)

4.6 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 statu ED 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

4.7 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 INMBSTOS001R000 device includes an onboard 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 an 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).

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: 0.5mm 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 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 Toshiba 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

Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual  & troubleshooting 14

List of supported AC Unit Types.

A list of Toshiba indoor unit model references compatible with INMBSTOS001R000 and their available features can be found in:
intesis_inxxxtos001rx00_compatibility-list [PDF]

Error Codes

Error
Code
Decimal
Error
Code
Hex
Error In
Remote
Controller
Error category Error Description
0 0 N/A INMBSTOS001R000 No active error
33 21 CO1 Central Controller Issues Duplicated setting of control address
34 22 CO2 Central control number of units mis-matched
35 23 CO3 Incorrect wiring of central control
36 24 C04 Incorrect connection of central control System Controller fault, error in transmitting comms signal, i/door or o/door unit not working, wiring fault
37 25 CO5
38 26 C06 System Controller fault, error in receiving comms signal, i/door or o/door unit not working, wiring fault, CN1 not connected correctly
44 2C C12 Batch alarm by local controller
48 30 C16 Transmission error from adaptor to unit
49 31 C17 Reception error to adaptor from unit
50 32 C18 Duplicate central address in adaptor
51 33 C19 Duplicate adaptor address
52 34 C20 Mix of PAC & GHP type units on adaptor
53 35 C21 Memory fault in adaptor
54 36 C22 Incorrect address setting in adaptor
55 37 C23 Host terminal software failure
56 38 C24 Host terminal hardware failure
57 39 C25 Host terminal processing failure
58 3A C26 Host terminal communication failure
60 3C C28 Reception error of S-DDC from host terminal
61 3D C29 Initialization failure of S-DDC
63 3F C31 Configuration change detected by adaptor
65 41 E01 Addressing and Communication
Problems
Remote control detecting error from indoor unit, Address not set/Auto address failed. Check interconnecting wiring etc. Re-address system.
66 42 E02 Remote detecting error from indoor unit,
67 43 E03 Indoor unit detecting error from remote,
68 44 E04 Indoor seeing error from outdoor. Qty of i/d units connected are less than qty set. Check; all i/d units are ON, reset turn off all units wait 5min power up
69 45 E05 Indoor unit detecting error from outdoor unit, Error in sending comms signal
70 46 E06 Outdoor unit detecting error from indoor unit, Error in receiving comms signal
71 47 E07 Outdoor unit detecting error from indoor unit, Error in sending comms signal
72 48 E08 Incorrect setting indoor/controller, Indoor address duplicated
73 49 E09 Incorrect setting indoor/controller, Remote address duplicated or IR wireless controller not disabled
74 4A El0 Indoor unit detecting error from ‘option’ plug, Error in sending comms signal
75 4B Ell Indoor unit detecting error from ‘option’ plug, Error in receiving comms signal
76 4C E12 Auto addressing failed, Auto address connector CN100 shorted during auto addressing
77 4D E13 Indoor unit failed to send signal to remote
78 4E E14 Setting Failure, Duplication of master indoor units
79 4F E15 Auto addressing failed, Number of indoor units connected are less than number set
80 50 E16 Auto addressing failed, Number of indoor units connected are more than number set
81 51 E17 Addressing and
Communication
Problems
Group control wiring error, Main indoor unit not sending signal for sub indoor units
82 52 E18 Group control wiring error, Main indoor unit not receiving signal for sub indoor units
83 53 E19 Outdoor header units quantity error
84 54 E20 Auto addressing failed, No indoor units connected
87 57 E23 Sending error in communication between outdoor units
88 58 E24 Auto addressing failed, Error on sub outdoor unit
89 59 E25 Auto addressing failed, Error on outdoor unit address setting
90 5A E26 Auto addressing failed, Quantity of main and sub outdoor units do not correspond to the number set on main outdoor unit P.C.B.
92 5C E28 Follower outdoor unit error
93 SD E29 Auto addressing failed, Sub outdoor unit not receiving comms for main outdoor unit
95 5F E31 Between units, Comms failure with MDC, does E31 remain after power is re-instated? If so replace PCB. & power PCB
97 61 F01 Sensor Faults Indoor Heat Exch inlet temp sensor failure (El)
98 62 F02 Indoor Heat Exch freeze temp sensor failure (E2)
99 63 F03 Indoor Heat Exch outlet temp sensor failure (E3)
100 64 F04 Outdoor Discharge temp sensor failure (TD) or (DISCHI)
101 65 F05 Outdoor Discharge temp sensor failure (DISCH2)
102 66 F06 Outdoor Heat Exch temp sensor failure (C1) or (EXG1)
103 67 F07 Outdoor Heat Exch temp sensor failure (C2) or (EXL1)
104 68 F08 Outdoor Air temp sensor failure (TO)
106 6A FIO Indoor inlet temp sensor failure
107 68 F11 Indoor outlet temp sensor failure
108 6C F12 Outdoor Intake sensor failure (TS)
109 6D F13 GHP – Cooling water temperature sensor failure
111 6F F15 Outdoor temp. sensor misconnection (TE1,TL)
112 70 F16 Outdoor High pressure sensor failure
113 71 F17 GHP – Cooling water temperature sensor fault
114 72 F18 GHP – Exhaust gas temperature sensor fault
116 74 F20 GHP Clutch coil temperature fault
119 77 F23 Outdoor Heat Exch temp sensor failure (EXG2)
120 78 F24 Outdoor Heat Exch temp sensor failure (EXL2)
125 7D F29 Indoor EEPROM error
126 7E F30 Clock Function (RTC) fault
127 7F F31 Outdoor EEPROM error
129 81 H01 Compressor Issues Compressor Fault, Over current (Compl)
130 82 H02 Compressor Fault, Locked rota current detected (Comp1)
131 83 H03 Compressor Fault, No current detected (Compl)
132 84 H04 Comp-1 case thermo operation
133 85 H05 Compressor Fault, Discharge temp not detected (Compl)
134 86 H06 Compressor Fault, Low Pressure trip
135 87 H07 Compressor Fault, Low oil level
136 88 H08 Compressor Fault, Oil sensor Fault (Compl)
139 88 H11 Compressor Fault, Over current (Comp2)
140 8C H12 Compressor Fault, Locked rota current detected (Comp2)
141 8D H13 Compressor Fault, No current detected (Comp2)
142 8E H14 Comp-2 case thermo operation
143 8F H15 Compressor Fault, Discharge temp not detected (Comp2)
144 90 H16 Oil level detection circuit error / Magnet switch error /Overcurrent relay error
149 95 H21 Compressor Fault, Over current (Comp3)
150 96 1122 Compressor Fault, Locked rota current detected (c.3)
151 97 H23 Compressor Issues Compressor Fault, No current detected (Comp3)
153 99 H25 Compressor Fault, Discharge temp not detected (Comp3)
155 98 H27 Compressor Fault, Oil sensor fault (Comp2)
156 9C H28 Compressor Fault. Oil sensor (connection failure)
159 9F H31 Compressor Fault. IPM trip (IMP current on temperature)
193 CI LO1 Incorrect Settings Setting Error, Indoor unit group setting error
194 C2 L02 Setting Error, Indoor/outdoor unit type/model miss-matched
195 C3 L03 Duplication of main indoor unit address in group control
196 C4 L04 Duplication of outdoor unit system address
197 C5 LO5 2 or more controllers have been set as ‘priority’ in one system – shown on controllers set as ‘priority’
198 C6 L06 2 or more controllers have been set as ‘priority’ in one system – shown on controllers not set as ‘priority’
199 C7 LO7 Group wiring connected on and individual indoor unit
200 C8 LOS Indoor unit address/group not set
201 C9 L09 Indoor unit capacity code not set
202 CA L10 Outdoor unit capacity code not set
203 CB L11 Group control wiring incorrect
205 CD L13 Indoor unit type setting error, capacity
207 CF L15 Indoor unit paring fault
208 DO L16 Water heat exch. unit setting failure
209 D1 L17 Miss-match of outdoor unit with different refrigerant
210 D2 L18 4-way valve failure
211 D3 L19 Water heat exch. unit duplicated address
212 D4 L20 Duplicated central control addresses
213 D5 L21 Gas type setup failure
220 DC 1_28 Maximum number of outdoor units exceeded
221 DD L29 No. of IPDU error
222 DE L30 Auxiliary interlock in indoor unit
223 DF L31 IC error
225 El P01 Indoor Unit Problems Indoor unit fault, Fan motor thermal overload
226 E2 P02 Outdoor unit fault, Compressor motor thermal overload, over or under voltage
227 E3 P03 Outdoor unit fault, Compressor discharge temperature too high (Comp’) over 111 0C. Low on ref gas, exp. valve, pipework damage.
228 E4 PO4 Outdoor unit fault, High pressure trip
229 E5 P05 Outdoor unit fault, Open phase on power supply. Check power on each phase, inverter PCB, control PCB
231 E7 P07 Heat sink overheat error
233 E9 P09 Indoor unit fault, Ceiling panel incorrectly wired
234 EA P10 Indoor unit fault, Condensate float switch opened
235 EB P11 GHP – Water Heat exch. low temp (frost protection) fault
236 EC P12 Indoor unit fault, Fan DC motor fault
237 ED P13 Outdoor liquid back detection error
238 EE P14 Input from leak detector (If fitted)
239 EF P15 Refrigerant loss, high discharge temp and EEV wide open and low compressor current draw.
240 FO P16 Outdoor unit fault, Open phase on compressor power supply
241 Fl P17 Outdoor unit fault, Compressor discharge temperature too high (Comp2) over 1110C. Low on ref gas, exp. valve, pipework damage.
242 F2 P18 Outdoor unit fault, By-pass valve failure
243 F3 P19 Outdoor unit fault, 4 way valve failure, i/door
temp rises in cooling or fills in heating. Check
wiring, coil, PCB output, valve operation.
Ref gas, high temp/pressure fault, heat exch. temp high C2, 55-60 0C, cooling over-load, sensor fault.
244 F4 P20 Outdoor unit fan motor fault, fan blade jammed, check connections, does fan turn freely, motor resistance 30-40ohm on each pair, no fan fault, yes PCB fault.
246 F6 P22 Outdoor unit fault, Compressor overcurrent – check winding resistance, Inverter failure – check internal resistance term HIC + & – to UVW 200-300Kohm or more
250 FA P26 Outdoor unit fault, Inverter circuit fault –
252 FC P29 Motor-current Detection Circuit (MDC) fault, check comp windings, sensors Cl & TS, if ok possible PCB failure
253 FD P30 Indoor unit fault, System controller detected fault on sub indoor unit
255 FF P31 Simultaneous operation multi control fault, Group controller fault
65535 (1) N/A INMBSTOSOO1R000 Error in the communication of INMBSTOS001R000 with the AC unit

In case to detect an error code not listed, contact your closest Toshiba technical support service.

© HMS Industrial Networks S.L.U. – All rights reserved This information is subject to change without notice
URL https://www.intesis.com

References

FAQ


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