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INMBSLGE001R000
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Intesis INMBSLGE001R000 User guide

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USER MANUAL
Issue date: 05/2020 r1.7 ENGLISH
User’s Manual r1.7 EN
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URL https://www.intesis.com
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Modbus RTU (EIA-485) Interface for LG air conditioners
ORDER CODE
LEGACY ORDER CODE
INMBSLGE001R000
LG-RC-MBS-1
User’s Manual r1.7 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.
User’s Manual r1.7 EN
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INDEX
1. Presentation .......................................................................................................... 5
2. Connection ............................................................................................................ 6
2.1 Connect to the AC indoor unit ............................................................................... 6
2.2 Connection to the EIA-485 bus ............................................................................. 7
3. Quick Start Guide ................................................................................................... 7
4. Modbus Interface Specification ................................................................................ 8
4.1 Modbus physical layer.......................................................................................... 8
4.2 Modbus Registers ................................................................................................ 8
4.2.1 Control and status registers ........................................................................... 8
4.2.2 Configuration Registers................................................................................ 10
4.2.3 Considerations on Temperature Registers ...................................................... 11
4.3 DIP-switch Configuration Interface ...................................................................... 14
4.4 Implemented Functions ..................................................................................... 17
4.5 Device LED indicator ......................................................................................... 17
4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 18
5. Mechanical and electrical features .......................................................................... 19
6. List of supported AC Unit Types. ............................................................................ 20
7. Error Codes ......................................................................................................... 21
User’s Manual r1.7 EN
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1. Presentation
The INMBSLGE001R000 interfaces allow a complete and natural integration of
LG 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 INMBSLGE001R000 devices
can be connected in the same network.
INMBSLGE001R000 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
INMBSLGE001R000
INMBSLGE001R000 INMBSLGE001R000
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2. Connection
The interface comes with a plug-in terminal block of 3 poles to establish direct connection with the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish direct connection with the Modbus RTU EIA-485 network.
2.1 Connect to the AC indoor unit
The INMBSLGE001R000 connects directly to the LG BYR Bus, which is not provided within the interface. Depending on which controllers are available, the recommended connection’ methods are the following ones (details in Figure 2. 1):
• Wired remote control available. Connect the gateway as Slave in parallel with the
wired Remote Controllers (Controller acts as Master).
• No remote control available Connect the gateway directly to the BYR bus of the
indoor unit as Master when there is no LG Remote Controller.
Maximum BYR bus length is 50 m / 164.04 ft. The bus has no polarity sensitivity.
Important: If a wired remote controller of the AC manufacturer is connected in the same bus, communication may shut down.
MODBUS RTU
EIA-485
Bus
EIA485
A+ B-
53 mm / 2.1”
Max. 50 m / 164.04 ft
AC Indoor Unit
90 mm / 3.5”
MODBUS RTU
EIA-485
Bus
EIA485
A+ B-
B Y R
AC Unit
53 mm / 2.1”
For wall mounting extract the upper and down staples until you hear the "click".
R Y B
Max. 50 m / 164.04 ft
Remote Controller
GND (3) B
Data (2) Y
Power (1) R
90 mm / 3.5”
AC Indoor Unit
Internal electronic control board
Internal electronic control board
B Y R
AC Unit
GND (3) B
Data (2) Y
Power (1) R
Attention: Type A units don’t allow to install a Remote Controller and
INMBSLGE001R000 together.
Figure 2. 1 INMBSLGE001R000 connection diagram
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2.2 Connection to the EIA-485 bus
Connect the EIA-485 bus wires to the plug-in terminal block (the one of two poles) of INMBSLGE001R000 and keep the polarity on this connection (A+ and B-). Make sure that the maximum distance to the bus is 1,200 meters (3,937 ft). Loop or star typologies are not allowed in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 4.6 for more details).
3. Quick Start Guide
1. Disconnect the air conditioning from the Mains Power.
2. Attach the interface next to the AC indoor unit (wall mounting) following the instructions
of the diagram below or install it inside the AC indoor unit (respect the safety instructions given).
3. Connect the BYR bus between the interface and the AC indoor unit following the
instructions of the diagram. Screw each bare cable end in the corresponding BYR 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.
By default, the interface is set to:
▪ Modbus Slave Address ➔ 1 ▪ Modbus baud rate ➔ 9600 bps
These parameters can be modified from SW4 and SW3 DIP-Switches.
All other switch positions are set at low level (Off position ) by default.
NOTE: All changes on the DIP-Switch configuration require a system power cycle to be applied.
7. Connect the AC system to Mains Power.
IMPORTANT: The Intesis interface requires to be connected to the AC unit (powered) to start communicating.
ON
ON
SW3
SW4
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4. Modbus Interface Specification
4.1 Modbus physical layer
INMBSLGE001R000 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..7: Pos. 1 .. Pos. 7
3
4
R/W
AC unit Vane Position 1
▪ 0: No Swing ▪ 1..4: Pos. 1 .. Pos. 4 ▪ 10: Swing ▪ 11: Swirl
4
5
R/W
AC unit Temperature Setpoint
1,2,3
▪ -32768 (Initialization value) ▪ 16..30ºC (ºC/x10ºC) ▪ 61..86ºF
5
6
R
AC unit Temperature reference
1,2,3
▪ -32768 (Initialization value) ▪ 10..38ºC (ºC/x10ºC) ▪ 50..100ºF
6
7
R/W
Window Contact
▪ 0: Closed (Default) ▪ 1: Open
1
Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible values for
this register.
2
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. See section 4.2.3 for more
information.
3
It is not possible turn to x10 the value shown in Fahrenheit.
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
7
8
R/W
INMBSLGE001R000 Disablement 4
▪ 0: INMBSLGE001R000 enabled (Default) ▪ 1: INMBSLGE001R000 disabled
8
9
R/W
AC Remote Control Disablement 4
▪ 0: Remote Controller enabled (Default) ▪ 1: Remote Controller disabled
9
10
R/W
AC unit Operation Time 4
▪ 0..65535 (hours). Counts the time the AC
unit is in “On” state.
10
11
R
AC unit Alarm Status
▪ 0: No alarm condition ▪ 1: Alarm condition
11
12
R
Error Code 5
▪ 0: No error present ▪ 65535(-1 if it is read as signed value): Error
in the communication of INMBSLGE001R000 or Remote Controller with the AC unit.
▪ If any error is 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 external sensor.
▪ Any from Manufacturer: (ºC/x10ºC/ºF)
23
24
R
AC Real setpoint temperature
1,2,3,6
▪ When no external temperature is provided,
this read-only register will have the same value as register 5 (PLC addressing). In all cases, it will show the current setpoint in the indoor unit.
▪ Any from Manufacturer: (ºC/x10ºC/ºF)
24
25
R
Current AC max setpoint
1,2,3
▪ -32768 (Initialization value) ▪ Any from Manufacturer: (ºC/x10ºC/ºF)
25
26
R
Current AC min setpoint
1,2,3
▪ -32768 (Initialization value) ▪ Any from Manufacturer: (ºC/x10ºC/ºF)
26
27
R/W
AC unit Left/Right Vane Position 1
▪ 0: Auto (Default) ▪ 1..9: Pos. 1 .. Pos. 9 ▪ 10: Swing
27
28
R/W
Up/Down Vane Position
▪ 1: Pulse
31
32
R
Status (feedback)
▪ 0: Not active (Default value) ▪ 1: Active (A window is open)
53
54
R
Compressor Status
▪ 0: Off ▪ 1: To Off ▪ 2: To On ▪ 3: On
4
This value is stored in non-volatile memory
5
See section 7 for possible error codes and their explanation
6
See section 4.2.3 for more information
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
54
55
R/W
Compressor on Time 4
▪ 0..65535 (hours). Counts the time the
Compressor is in “On” state.
65
66
R
Input Ref. Temperature (feedback)
1,2,3
▪ -32768 (Initialization value) ▪ Any from Manufacturer: (ºC/x10ºC/ºF)
97
98
R/W
Block Periodic Sendings
4,7,8
▪ 0: Non-blocked (Default value) ▪ 1: Blocked
98
99
R/W
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 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
21
22
R
Max number of fan speeds
48
49
R
Switch value
49
50
R
Device ID: 0x1000
50
51
R
Software version
99
100
R/W
Reset
▪ 1:Reset
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 1.7 onwards
9
Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.
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4.2.3 Considerations on Temperature Registers
• AC unit temperature setpoint (R/W)
(register 4 – in Protocol address / register 5 – in PLC address): This is the adjustable temperature setpoint value that must be required by the user. This register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16). A remote controller connected to the LG indoor unit will report the same temperature setpoint value as this register, but only will happen when no AC unit´s external reference is provided from INMBSLGE001R000 (see detail for register 22/23 below).
• 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 LG indoor unit as the reference of its own control loop. Depending on the configuration of the indoor unit, this value can be the temperature reported by the sensor on the return path of the LG indoor unit or the sensor of its remote controller. It is a read-only register (Modbus functions 3 or 4).
• AC unit external temperature reference (Modbus) (R/W)
(register 22 – in Protocol address / register 23 – in PLC address): This register allows us to provide an external temperature’s sensor from the Modbus side. LG indoor unit does not allow on devices like INMBSLGE001R000 to provide directly temperature to be used as a reference of the control loop of the AC indoor unit. In order to overcome this limitation and enable the usage of an external temperature sensor (i.e.from Modbus side), INMBSLGE001R000 applies the following mechanism (only if “external temperature’s reference” is being used):
o After a couple of values have been entered in the “AC unit external temperature’s
reference” (register 22/23) and “AC unit temperature set point” (register 4/5), INMBSLGE001R000 is going to estimate the temperature chosen implied (e.g. if a “temperature setpoint (register 4/5)” of 22ºC, and an “external temperature reference (register 22/23)” of 20ºC are entered, INMBSLGE001R000 will assume that the user is demanding a +2ºC increase in temperature).
o By knowing at any time the ambient temperature currently used by the indoor
unit to control its own operation (register 5/6), INMBSLGE001R000 can calculate the required temperature setpoint needed to apply the decrease/increase on the real temperature and reach the temperature chosen by the user (following the example above, if INMBSLGE001R000 reads an “ambient temperature” (register 5/6) of 24ºC in the indoor unit, it will apply a final setpoint of 24ºC + 2ºC = 26ºC).
o At this moment, each time that INMBSLGE001R000 detects a change on the
ambient temperature reported by the indoor unit (register 5/6), it will also change the required setpoint, in order to keep the temperature required by the user at any time. If we follow the last example, if INMBSLGE001R000 receives a new temperature´s value coming from the indoor unit of 25ºC, INMBSLGE001R000 will automatically adjust the temperature setpoint required of the AC indoor unit to 25ºC + 2ºC = 27ºC).
o In general, INMBSLGE001R000 is constantly applying the “Virtual Temperature”
formula:
SAC = Su – ( Tu – T
AC
)
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Where:
SAC - setpoint value currently applied to the indoor unit Su - setpoint value written at Modbus side (register 4/5) Tu - external temperature reference written at Modbus side (register 22/23) TAC - ambient temperature that the indoor unit is using as the reference of its
own control loop (register 5/6)
When INMBSLGE001R000 detects a change in any of the values of
{ Su , Tu , TAC }, it will send the new setpoint (SAC) to the indoor unit.
o After the startup, the value for “external temperature’s reference” (register
22/23) has a value -32768 (0x8000). This value means that no external temperature reference is being provided through INMBSLGE001R000. In this scenario, the setpoint value shown in register 4/5 will always be the same as the current setpoint value of the indoor unit. AC indoor unit will use its own return path temperature sensor as reference for its control loop.
o When the mechanism of “Virtual Temperature” is applied. The temperature
setpoint’s value shown by the Remote Controller or other Control System from LG
connected to the indoor unit may show a different value from the value shown in register 4/5.
o If it is desired to use the temperature’s reading from the Remote Control as the
external temperature reference (Tu ,register 22/33), the Remote Controller must be configured as Master, and the LG AC indoor unit must have the option “thermostat sensor in the Remote Controller” as activated. This configuration is done via a LG Remote Controller connected to the indoor unit and must be done by LG authorized installers while the AC is being installed.
o When INMBSLGE001R000 is set as “Master” of BYR bus, the external
temperature’s sensor connected to Modbus RTU EIA-485 network provides
directly the value currently applied to the indoor unit ( SAC ), and the process of the Virtual temperature is not applied. In this case, the Remote Controller or any other Control System connected from LG is not able to send the external temperature reference’s value to the register 22/23.
• AC Real Setpoint temperature (R)
(register 23 – In Protocol address / register 24 – in PLC address): As it has been detailed on the previous point, the real temperature setpoint in the indoor
unit and the temperature setpoint requested from INMBSLGE001R000 might differ (when a value in register 22/23 – “external temperature reference” is entered). This register always informs about the current temperature setpoint which is being used by the indoor unit – it is also includes the temperature setpoint that will be shown by an additional remote controller from LG connected to the indoor unit, if it is present on the system.
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Moreover, notice that temperature’s values of all these four registers are expressed according to the temperature´s format configured through its onboard DIP-Switches (See “4.3 - DIP-switch Configuration Interface”). These following formats are possible:
• Celsius value: Value in Modbus register is the temperature value in Celsius (i.e. a
value “22” in the Modbus register must be interpreted as 22ºC).
• Decicelsius value: Value in Modbus register is the temperature value in
decicelsius (i.e. a value “220” in the Modbus register must be interpreted as
22.0ºC).
• Fahrenheit value: Value in Modbus register is the temperature value in
Fahrenheit (i.e. a value “72” in the Modbus register must be interpreted as 72ºF (~22ºC).
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4.3 DIP-switch Configuration Interface
All the configuration values on INMBSLGE001R000 can be written and read from Modbus interface. Otherwise, some of them can also be setup from its on-board DIP-switch interface. The device has DIP-switches SW1, SW3 and SW4 on the following locations:
The following tables apply to the interface´s configuration through DIP-switches:
SW1 – AC indoor unit’s features
SW1-P1..4
Description
Slave - A LG Controller must be present in BYR bus, configured as Master (Default value)
Master – LG Controller not needed in BYR bus. If it exists, it must be configured as Slave
Error Type_B – Machine must be Type B (Default value)
Error Type_A – Machine must be Type A
Min. ambient temperature not applied (Default value)
Min. ambient temperature applied
Keep the switch into this position (Default value)
Do not turn the switch into this position (not applicable)
Table 4.1 SW1: AC indoor unit´s features
EIA485
A+ B-
B Y R
AC Unit
SW1
SW1
SW4
ON
1 2 3 4
ON
SW3
1 2 3 4
1 2 3 4 5 6 7 8
ON
ON
ON
ON
ON
ON
ON
ON
ON
SW3
SW4
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SW3/SW4 – Baud rate configuration
SW3-P7..8
SW4-P3
Description
2400bps
4800bps
9600bps (Default value)
19200bps
38400bps
57600bps
76800bps
115200bps
Table 4.2 SW3-SW4: Modbus baud rate
SW4 – Degrees/Decidegrees (x10), temperature magnitude (ºC/ºF) and EIA-485 termination
resistor.
Table 4.3 SW4: Temperature and termination resistor configuration
SW4-P1..2-4
Description
Temperature values in Modbus register are represented in degrees (x1) (Default value)
Temperature values in Modbus register are represented in decidegrees (x10)
Temperature values in Modbus register are represented in Celsius degrees (Default value)
Temperature values in Modbus register are represented in Fahrenheit degrees
EIA-485 bus without termination resistor (Default value)
Internal termination resistor of 120Ω connected to EIA-485 bus
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
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SW3 – Modbus Slave address
Table 4.4 SW3: Modbus slave address
Add SW3-P1..6
Add SW3-P1..6
Add SW3-P1..6
Add
SW3-P1..6
Add
SW3-P1..6
0
13
26
39
52
1
14
27
40
53
2
15
28
41
54
3
16
29
42
55
4
17
30
43
56
5
18
31
44
57
6
19
32 45
58
7
20
33 46
59
8
21
34
47
60
9
22
35
48
61
10
23
36 49
62
11 24 37 50 63
12 25 38 51
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
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4.4 Implemented Functions
INMBSLGE001R000 implements the following standard Modbus functions:
▪ 3: Read Holding Registers ▪ 4: Read Input Registers ▪ 6: Write Single Register ▪ 16: Write Multiple Registers (Despite this function is allowed, the interface does not
allow to write operations on more than 1 register with the same request, this means that length field should be always be 1 when this function is being used in case of writing)
4.5 Device LED indicator
The device includes two LED indicators to show all the possible operational states. In the following table there are written the indicators which can be performed and their meaning.
L1 (green LED)
Device status
LED indication
ON / OFF Period
Description
During not normal operation
LED blinking
500ms ON / 500ms OFF
Communication error
During normal operation
LED flashing
100ms ON / 1900ms OFF
Normal operation (configured and working properly)
L2 (red LED)
Device status
LED indication
ON / OFF Period
Description
During not normal operation
LED Pulse
3sec ON / --- OFF
Under voltage
L1 (green LED) & L2 (red LED)
Device status
LED indication
ON / OFF Period
Description
During normal operation
LED Pulse
5sec ON / --- OFF
Device Start-up
During not normal operation
LED alternatively
blinking
500ms ON / 500ms OFF
Flash checksum not OK
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4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing
mechanism
EIA-485 bus requires a 120Ω terminator resistor at each end of the bus to avoid signal reflections.
In order to prevent fail status detected by the receivers, which are “listening” the bus, when all the transmitters’ outputs are in three-state (high impedance), it is also required a fail-safe biasing mechanism. This mechanism provides a safe status (a correct voltage level) in the bus when all the transmitters’ outputs are in three-state. This mechanism must be supplied by the Modbus Master.
The INMBSLGE001R000 device includes an on-board terminator resistor of 120Ω that can be connected to the EIA-485 bus by using DIP-switch SW4.
Some Modbus RTU EIA-485 Master devices can provide also internal 120Ω terminator resistor and/or fail-safe biasing mechanism (Check the technical documentation of the Master device connected to the EIA-485 network in each case).
User’s Manual r1.7 EN
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This information is subject to change without notice
URL https://www.intesis.com
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5. Mechanical and electrical features
Enclosure
Plastic, type PC (UL 94 V-0) Net dimensions (dxwxh): 93 x 53 x 58 mm / 3.7” x 2.1” x 2.3” Color: Light Grey. RAL 7035
Operation Temperature
0ºC to +60ºC
Weight
85 g.
Stock Temperature
-20ºC to +85ºC
Mounting
Wall DIN rail EN60715 TH35.
Operational Humidity
<95% RH, non-condensing
Terminal Wiring (for low-voltage signals)
For terminal: solid wires or stranded wires (twisted or with ferrule)
1 core: 0.5mm2… 2.5mm2 2 cores: 0.5mm2… 1.5mm2
3 cores: not permitted
Stock Humidity
<95% RH, non-condensing
Modbus RTU port
1 x Serial EIA485 Plug-in screw terminal block (2 poles):
A, B Compatible with Modbus RTU EIA-485 networks
Isolation voltage
1500 VDC
AC unit port
1 x BYR bus Plug-in screw terminal block (3 poles):
B, Y, R Compatible with LG networks
Isolation resistance
1000 MΩ
Switch 1 (SW1)
1 x DIP-Switch for AC features
Protection
IP20 (IEC60529)
Switch 3 (SW3)
1 x DIP-Switch for Modbus RTU settings
LED indicators
2 x Onboard LED - Operational status
Switch 4 (SW4)
1 x DIP-Switch for extra functions
EIA-485
Port
AC Unit
connection
DIP
Switch SW3
DIP
Switch SW1
LED
Indicators
DIP
Switch SW4
User’s Manual r1.7 EN
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This information is subject to change without notice
URL https://www.intesis.com
20 / 22
6. List of supported AC Unit Types.
A list of LG indoor unit model’s references compatible with INMBSLGE001R000 and its available features can be found on this link:
https://www.intesis.com/docs/compatibilities/inxxxlge001r000_compatibility
User’s Manual r1.7 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
21 / 22
7. Error Codes
Error Code
Modbus
Remote
Controller
Error
Error description
0
N/A
No active error
1
1
Room air sensor fault
2
2
Indoor unit pipe in sensor fault
3
3
Communication fault between wired remote controller and indoor unit
4
4
Drain pump fault
5
5
Communication fault between indoor unit and outdoor unit
6
6
Indoor unit pipe out sensor fault
7
7
Indoor unit mode runs on opposite to outdoor unit
8
8
N/A 9 9
EEPROM memory fault
10
10
BLDC motor signal fault or motor lock
11
11
HEX middle point sensor fault
12
12
heater terminal block sensor fault
13
13
N/A
14
14
N/A
15
15
N/A
16
16
N/A
17
17
Outlet air sensor fault
18
18
Return air sensor fault
19
19
No communication response from sub PCB to main PCB
20
20
No communication response from main PCB to sub PCB
21
21
IPM fault
22
22
AC input is over current (RMS)
23
23
DC link low or high voltage
24
24
High pressure or low pressure switch on
25
25
High/low input voltage
26
26
Compressor start failure
27
27
PSC/PFC fault
28
28
DC link high voltage
29
29
Over current at compressor input
32
32
Discharge temperature is high at inverter compressor
33
33
Discharge temperature is high at constant speed compressor
34
34
High pressure is too high
35
35
Low pressure is too low
36
36
Compression ratio is too low
39
39
Communication fault between PFC and inverter PCB
40
40
CT sensor fault
41
41
Discharge sensor at inverter compressor is fault
42
42
Low pressure sensor is fault
43
43
High pressure sensor is fault
44
44
Air sensor at outdoor unit is fault
45
45
HEX sensor at outdoor unit is fault
46
46
Compressor suction sensor is fault
47
47
Discharge sensor at constant speed compressor is fault
48
48
HEX outlet sensor at outdoor unit is fault
49
49
IPM temperature sensor is fault
50
50
Missing phase among 3 phase
51
51
Over combination ratio
52
52
No communication from inverter PCB detected at main PCB
53
53
Communication fault between indoor and outdoor unit
54
54
Reverse phase is detected
57
57
No communication from main PCB detected at inverter PCB
User’s Manual r1.7 EN
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This information is subject to change without notice
URL https://www.intesis.com
22 / 22
59
59
Wrong outdoor unit combination
60
60
Inverter EEPROM memory fault
61
61
Outdoor pipe temperature is too high
62
62
IPM temperature is too high
65
65
IPM temperature sensor is fault
67
67
Fan locked or fan start failure
69
69
CT sensor of constant speed compressor 1 is fault
70
70
CT sensor of constant speed compressor 2 is fault
71
71
PFC CT sensor fault
72
72
Function error of outdoor 4way valve (reversing valve)
73
73
DC peak current is over
74
74
Unbalance at 3 phase
75
75
Fan CT sensor fault
76
76
Fan DC link voltage is high
77
77
Fan input voltage is high
78
78
Fan hall sensor fault
79
79
Fan motor start failure
86
86
Main PCB EEPROM is fault
87
87
Fan PCB EEPROM is fault
88
88
PFC PCB EEPROM is fault
90
90
Inlet temperature sensor of external PCB is fault
91
91
Outlet temperature sensor of external PCB is fault
104
104
No Communication from slave is detected
105
105
Communication fault between fan and inverter PCB
106
106
Fan PCB IOM fault
107
107
Fan DC link voltage is low
113
113
Liquid pipe sensor fault
114
114
Sub-cooling inlet pipe sensor fault
115
115
Sub-cooling outlet pipe sensor fault
116
116
Oil level sensor fault
145
145
No communication from external PCB is detected at main PCB
151
151
4 way valve failure
153
153
Upper HEX sensor fault
154
154
Bottom HEX sensor fault
173
173
Over / low current at constant speed compressor 1
174
174
Over / low current at constant speed compressor 2
182
182
Communication fault between main and sub micom in external PCB
187
187
Hydro-kit water temperature sensor fault
190
190
Inverter PCB heat sink temperature is high
191
191
Inverter PCB heat sink temperature sensor fault
193
193
Fan PCB heat sink temperature is high
194
194
Fan PCB heat sink temperature sensor fault
200
200
Auto piping failure
201
201
Fault at liquid pipe sensor of Heat Recovery (HR) unit
202
202
Fault at sub-cooling inlet pipe sensor of Heat Recovery (HR) unit
203
203
Fault at sub-cooling outlet pipe sensor of Heat Recovery (HR) unit
204
204
No communication from outdoor unit is detected at the Heat Recovery (HR) unit
205
205
HR unit addresses are duplicated
237
237
No response from outdoor unit modem at indoor unit modem
238
238
No response from outdoor unit at outdoor unit modem
65535
(-1)
N/A
Error in the communication of INMBSLGE001R000 or Remote Controller with the AC unit.
In case to detect an error code not listed, contact your closest LG technical support service.
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