LG PDRYCB500 User manual

Modbus Gateway for Indoor Unit
Original instruction
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring standards by
authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.
INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
www.lghvac.com
Copyright © 2015 - 2020 LG Electronics Inc. All Rights Reserved.
MFL67708320
Rev.01_081820
LG Electronics Inc.
Manufacturer: LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA
ENGLISH
FRANÇAIS
ESPAÑOL

2Modbus Gateway For Indoor Unit
TABLE OF CONTENTS
nImportant Safety Instructions.............................................3~4
nSpecification ...........................................................................5
nName of each part .................................................................6
nInstallation Method.............................................................7~9
nSetting method .....................................................................10
1. Connecting Drycontact with Indoor unit
PCBA and Modbus Controller ...........................................................10
2. Setting Address .................................................................................10

Important Safety Instructions
Installation manual 3
ENGLISH
Important Safety Instructions
READ ALL INSTRUCTIONS BEFORE USING
THE APPLIANCE.
Always comply with the following precautions to
avoid dangerous situations and ensure peak
performance of your product.
WARNING
It can result in serious injury or death when the
directions are ignored.
CAUTION
It can result in minor injury or product damage
when the directions are ignored.
WARNING
• Installation or repairs made by unqualified
persons can result in hazards to you and others.
• Installation work must be performed in
accordance with the National Electric Code by
qualified and authorized personnel only.
• The information contained in the manual is
intended for use by a qualified service
technician familiar with safety procedures and
equipped with the proper tools and test
instruments.
• Failure to carefully read and follow all
instructions in this manual can result in
equipment malfunction, property damage,
personal injury and/or death.
Installation
• Be sure to request to the service center or
installation specialty store when installing
products. It will cause fire or electric shock or
explosion or injury.
• Request to the service center or installation
specialty store when reinstalling the installed
product. It will cause fire or electric shock or
explosion or injury.
• Do not disassemble, fix, and modify products
randomly. It will cause fire or electric shock.
• Be sure to turn off power before installation. It
will cause electric shock.
• Installation work must be performed in
accordance with the national wiring standards
by authorized personnel only.
• Always perform grounding. Otherwise, it may
cause electrical shock.
• You need to use a safely insulated power supply
which follows IEC61558-2-6 anc NEC Class2. If
you do not follow, It may cause fire, electric
shock, explosion or injury.
• Securely attach the electrical part cover to
Module. If the electric part cover of Module is
not attached securely, it could result in a fire or
electric shock due to dust, water, etc.
• Make the connections securely so that the
outside force of the cable may not be applied to
the terminals. Inadequate connection and
fastening may generate heat and cause a fire.
In-use
• Do not place flammable stuffs close to the
product. It will cause fire.
• Do not allow water to run into the product. It will
cause electric shock or breakdown.
• Do not give the shock to the product. It will
cause breakdown when giving the shock to the
product.
• Request to the service center or installation
specialty store when the product becomes wet.
It will cause fire or electric shock.
• Do not give the shock using sharp and pointed
objects. It will cause breakdown by damaging
parts.
• Do not touch the board when the power is
connected. It can cause a fire, electric shock,
explosion, injury and problem to the product.
• Unplug the unit if strange sounds, smell, or
smoke comes from it. Otherwise, it may cause
electrical shock or a fire.
• The appliance must only be supplied at safety
extra low voltage corresponding to the marking
on the appliance.
• This appliance is not intended to be accessible
to the general public.
!
!
!

Important Safety Instructions
4Modbus Gateway For Indoor Unit
CAUTION
Installation
• The Limited Warranty is void and of no effect,
and LG will have no liability hereunder to any
Customer or third party, to the extent any of the
following occur: acts, omissions, and conduct of
any and all third parties including, but not limited
to, the installing contractor and any repairs,
service or maintenance by unauthorized or
unqualified persons.
• Do not install the unit in potentially explosive
atmospheres.
In-use
• Do not clean using the powerful detergent like
solvent but use soft cloths. It will cause fire or
product deformation.
• Do not press the screen using powerful
pressure or select two buttons. It will cause
product breakdown or malfunction.
• Do not touch or pull the lead wire with wet
hands. It will cause product breakdown or
electric shock.
• This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities, or lack
of experience and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a person
responsible for their safety. Children should be
supervised to ensure that they do not play with
the appliance.
• This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they
have been given supervision or instruction
concerning use of the appliance in a safe way
and understand the hazards involved. Children
shall not play with the appliance. Cleaning and
user maintenance shall not be made by children
without supervision.
!

Specification
Installation manual 5
ENGLISH
Specification
1) Modbus configuration
- Network : 2 wire RS485
- Mode : Modbus RTU slave
- Baud : 9 600
- Parity : None
- Stop bits : 1
2) Data registers
※Above function may not work in some products.
Function code Register Address Name Range Notes
01(read)/05(write) 00001 0x0000 Operation 0~1 0: Stop
1: Run
04(read) 30001 0x0000 Pipe in temprature -300~1120 Degrees (℃) × 10
04(read) 30002 0x0001 Pipe out temperature -300~1120 Degrees (℃) × 10
04(read) 30003 0x0002 Indoor temperature 100~400 Degrees (℃) × 10
04(read) 30100 0x0063 Error code 0~999 0: No error
1~999: Error code
03(read)/06(write) 40001 0x0000 Set run mode (aircon) 0~4
0: Cool
2: Fan
3: Auto
4: Heat
03(read)/06(write) 40002 0x0001 Set temperature 180~300 Degrees (℃) × 10
03(read)/06(write) 40003 0x0002 Set run mode
(ventilation) 0~2
0: Heat exchange
1: Auto
2: Bypass
03(read)/06(write) 40004 0x0003 Set sub operation
(ventilation) 0~2
0: Off
1: Fast
2: Energy saving
03(read)/06(write) 40015 0x000E Set fan speed 1~3
1: Low
2: Middle
3: High
4: Auto
7: Super High

Modbus Gateway For Indoor Unit
Name of each part
PCB
Front Case Rear Case
ISO View
Side Side
12
ON
34
18
2
3
4
765
Cable(1 EA)
(For Connecting with indoor unit)
Connector (1 EA)
(For expanding address range)
Installation Manual
* Others :
Screw 4 EA(For installation)
1. CN-OUT :
2. BUS-A :
3. BUS-B :
4. SW1 :
5. SWDIP :
6. LED1 :
7. LED(01~03)G :
8. CN-JIG :
Indoor Unit Connector
RS-485(+) Terminal
RS-485(-) Terminal
Reset Switch
Setting Address Switch(Refer Page 11)
RS-485 Status LED
Communication Status LED
Connector for expanding the address range
Name of each part
6Modbus Gateway For Indoor Unit

Installation manual 7
Installation Method
ENGLISH
Installation Method
Installation inside of the indoor unit
1) Loosen and remove two screws that secure the product.
2) Loosen two screws that secure the PCB to separate rear of the case from the PCB.
3) Connect the connection wires properly according to the connection method. (Refer to the instruction
and set-up description)
4) Set the switch according to the setting method. (Refer to the instruction and set-up description)
5) Secure PCB on adequate space inside of the indoor unit.
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the controller.

Installation
1) Loosen and remove two screws that secure the
product.
2) Position the rear case to the direction towards to the
connector for convenient cable arrangement.
3) Secure the rear case on the installation place using the
supplied fixing screws.
4) Remove knock out shapes on the rear case according
to the connector’s size and direction.
8Modbus Gateway For Indoor Unit
Installation Method

Installation manual 9
ENGLISH
Installation Method
5) Connect the connection wires properly according to the connection method. (Refer to the instruction
and set-up description)
6) Set the switch according to the setting method. (Refer to the instruction and set-up description)
7) Tighten the fixing screws on the top and bottom of the case.
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the controller.

Setting method
1. Connecting Drycontact with Indoor unit PCBA and Modbus Controller
2. Setting Address
After change any Dry contact setting, then you must press RESET switch to reflect the setting.
Indoor unit PCBA
CN_CC
12
ON
34
Modbus
Controller
12
ON
34 12
ON
34
12
ON
34 12
ON
34
12
ON
34 12
ON
34
*Status of switch
- Not attached(default): 1~8
- Attached(expanding address range): 9~16
* /Number: Address when connector is attached
12
ON
34 12
ON
34
Address 1/9 Address 2/10
Address 3/11 Address 4/12
Address 5/13 Address 6/14
Address 7/15 Address 8/16
ON
OFF
12
ON
34
10 Modbus Gateway For Indoor Unit
Setting method
After change any Dry contact setting, then you must press RESET switch to reflect the setting.
hIn case, connect a Modbus controller with several product, Address have to be set different from
others.
hIf the connector is attached to ‘CN-JIG’, the address range is expanded. (Please attach the
connector before turning on the product.)