LG AC Smart IV CACS4B000 User manual

P/NO : MFL68463901
www.lg.com
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/
OWNER’S MANUAL
AIR
CONDITIONER
AC Smart IV
PACS4B000, CACS4B000
ENGLISH

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EXPLANATORY NOTES
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EXPLANATORY NOTES
Copyrights
The contents of this AC Smart IV Installation and User Manual are protected by international
copyright laws, and the Computer Program Protection Act. The contents of the Installation/User
Manaual and the programs mentioned herein may only be used under license from LG Electronics in
strict adherence to the user agreement.
You may not reproduce or distribute, by any means, copies of this Installation and User Manual, or
any part of it, without prior approval from LG Electronics.
Copyright © 2014 LG Electronics. All rights reserved.
Registered Trademarks
AC Smart IV is a registered trademark of LG Electronics. All other products and company names are
trademarks of their respective owners and are used for illustrative purposes only.

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EXPLANATORY NOTES
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Product Features
Convenience
• Auto-changeover
Automatically switches the indoor unit into the correct mode to optimize space comfort.
• Web access
Allows distributed control from a remote location.
• Visual and e-mail alarm notification
Immediately indicates when a system is not operating at optimal conditions.
• Visual Navigation
Allows for accessing unit data by navigating uploaded floorplans.
Energy Savings
• Scheduling
Conditions the space only when necessary.
• Setpoint Range Limit
Prevents the setpoint from being set to extremes that can result in overcooling or overheating
of the space.
• Remote Controller Lock
Prevents users from changing indoor unit operation.
• Setback
Allows indoor units to be shut off during unoccupied periods with an override feature to keep
interior temperatures from reaching extremes.
• Time Limit
Allows a unit to be turned on during unoccupied times and automatically shut down after a
specified amount of run time.
• Peak/Demand Control
Allows for electronically limiting power usage.
Integration
• Interlocking
Allows interlocked operation between devices or between digital inputs and outputs on the AC
Smart and devices.

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EXPLANATORY NOTES
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How to Use This Guide
Please read from beginning to end this User Manual before using AC Smart IV. Store this guide so
that is also easily accessible.
Notations Used In This Guide
• Control buttons displayed within the system are marked by boldface text in square brackets ([ ]).
Example: [OK], [Save]
• Option titles displayed in the program are marked by boldface text.
Example: Start, Programs
• Keyboard strokes used by the system are marked by boldface text in angle brackets (< >).
Example: <Esc>

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MEMO

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TABLE OF CONTENTS
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1
SAFETY
PRECAUTIONS
7
PREPARATION
7AC Smart IV Overview
7Components
8Product Specifications
9Features and Functions
10 Installation and Configuration
10 – Installation
19 – Configure Remote Shutdown Feature
20 Information Input Method
21
STARTING
21 Turning on/off the screen
21 – Turning on the screen
21 – Turning off the screen
22 Rebooting
22 Login and logout
23
Troubleshoot
23 Control Codes
23 Error Codes
23 – Indoor Device, ERV or ERV DX,
AWHP(Hydro kit), AHU error
25 – Outdoor Unit Errors
27 – MultiV 20 Hp, 30 Hp, 40 Hp, error
29 – Super Errors
30 – Central Controller Errors
31 Pre-Tech Support Checklist
31 OPEN SOURCE SOFTWARE
NOTICE
TABLE OF CONTENTS

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MEMO

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SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
• This product must be installed by an installation professional from an LG authorized service
center.
• Any issues stemming from an installation by an unauthorized person is the responsibility of
the user and will not be covered by warranty.
• The following safety precautions are to prevent any unforeseen dangers or damage.
• This product has been designed for business use, or for areas outside the home, and has
passed the Electromagnetic Interference Test.
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
yTo reinstall the product, please contact the dealer from where you purchased the
product, or a service center for reinstallation service.
-Installation of the product by an unauthorized person may result in fire, electric shock, explo-
sion, injury, or a malfunctioning of the product.
yDo not twist or damage the power cord.
-It may cause fire or electric shock.
yFor electrical work, please contact the dealer from where you purchased the product, or
a service center.
-Disassembly or repair by an unauthorized person may result in fire or electric shock.
yInstall the product in an area shielded from rain.
-If water gets into the product, it may malfunction.
yDo not install the product in a humid area.
-If the product is damp, it may malfunction.
yFor installation of the product, please contact the dealer from where you purchased the
product, or a service center.
-Installation of the product by an unauthorized person may result in fire, electric shock, explo-
sion, injury, or a malfunctioning of the product.

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SAFETY PRECAUTIONS
yFor electrical work, please have an electrician do the work based on the installation
manual and specified circuit diagram.
-Using an unsuitable cord, or having a non-professional work on the electricals may result in fire
or electrical shock.
yDo not place the product near a fire source.
-It may result in the product catching fire.
yIf the product is installed in a hospital or a communication base station, provide
sufficient protective equipment against electrical noise.
-The product may malfunction or other products may work abnormally.
ySecurely install the product.
-If the product is not secured during installation, it may fall or malfunction.
yRead the manual thoroughly to correctly install the product.
-If not, an incorrect installation may cause fire or electric shock.
yWhen wiring the product, do not use a non-standard cable, nor extend the cable
excessively.
-It may cause a fire or electric shock.
ySecurely install the power cord and communication cable.
-An unsecure installation may result in a fire or electric shock.
yDo not connect the power cord to the communication terminal.
-It may cause a fire, electric shock, or a product malfunction.
yDo not install the product in an area near combustible gas.
-It may result in fire, electric shock, explosion, injury, or a malfunctioning of the product.
Use
yDo not place a heavy object on the power cord.
-It may cause a fire or electric shock.
yDo not change or extend the power cord arbitrarily.
-It may cause a fire or electric shock.
yUse the cord specific to the product.
-Using an unauthorized non-standard cord may result in a fire or electric shock.
yDo not use a heat device near the power cord.
-It may cause a fire or electric shock.
yEnsure that water never gets into the product.
-It can result in an electric shock, or the product may malfunction.
yDo not place any container with liquid on the product.
-The product may malfunction.

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SAFETY PRECAUTIONS
yDo not touch the product with wet hands.
-It may cause a fire or electric shock.
yUse standard components.
-Use of an unauthorized product may result in fire, electric shock, explosion, injury, or a malfunc-
tioning of the product.
yIf the product has been submerged in water, you should contact a service center.
-It may cause a fire or electric shock.
yDo not shock the product.
-The product may malfunction.
yDo not store or use any combustible gas or flammable substances near the product.
-It may cause a fire, or a product malfunction.
yDo not disassemble, repair, or revamp the product arbitrarily.
-It may cause a fire or electric shock.
yChildren and the elderly should use the product under the supervision of a guardian.
-Carelessness may cause an accident, or the product to malfunction.
yThe guardian should prevent children from accessing the product.
-The product may be damaged or it may fall, causing injury to children.
yKeep in mind the operating temperature range specified in the manual.
if there is no operating temperature range in the manual, use the product between 0 and
40 °C (32 and 104 °F).
-If the product is used outside this range, the product may be severely damaged.
yDo not press the switch or button with a sharp object.
-It can result in an electric shock, or the product may malfunction.
yDo not wire the product while it is turned on.
-It may cause a fire or electric shock.
yIf the product sounds or smells different, stop using the product.
-It may cause a fire or electric shock.
yDo not place a heavy object on the product.
-The product may malfunction.
yDo not spray water on the product, or clean it with a water-soaked cloth.
-It may cause a fire or electric shock.
yDo not use the product for the preservation of animals and plants, precision
instruments, art pieces, or for other special purposes.
-It may cause property damage.
yDispose the packing material safely.
-The packing material may result in personal injuries.

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SAFETY PRECAUTIONS
CAUTION
Installation
ySecurely install the product in an area where the weight of the product can be supported.
-The product may fall and be destroyed.
yDo not use the product where there is oil, steam, or sulfuric gas.
-It may effect the product's performance, or damage it.
yCheck the rated power capacity.
-It may cause a fire, or a product malfunction.
yUse the adapter provided with the product or power from a class 2 AC 24 V transformer,
depending on model.
-If a non-standard adapter is used, the product may malfunction. The adaptor is not provided
with the AC Smart IV package sold in the U.S.
yBe careful not to drop or damage the product when moving it.
-The product may malfunction or the person may sustain an injury.
yEnsure that the cord is connected securely to prevent dew, water, or insects from getting
into the product.
-If a foreign substance gets inside, it may cause an electric shock or the product may malfunc-
tion.
Use
yClean the product with a soft cloth, but not with a solvent-based detergent.
-The use of a solvent-based detergent may cause a fire or deform the product.
yDo not touch the panel using a pointy or sharp object.
-It can result in an electric shock, or the product may malfunction.
yDo not let the product come into contact with a metal substance.
-The product may malfunction.
yWhen sterilizing or disinfecting, stop using the product.
-The product may work abnormally.
yDo not touch inside the product.
-The product may malfunction.
yCheck the condition of the product after using the product for an extended period of
time.
-If the product is used for an extended period of time, the product's condition may be worsen,
causing injury to the user.
yDo not leave the product near a flower base, water bottle, or any other liquids.
-It may cause a fire or electric shock.

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SAFETY PRECAUTIONS
yIf the liquid crystal of the product is broken, please do not let your skin such as face or
hands contact with.
-Personal injury or property damage may occur.
yTransformer selection:
-Select an insulating product that complies with IEC61558-2-6 and NEC Class 2.
-In addition, consider the combined power consumption of the modules, accessories, and field
devices installed for the selection of an appropriate transformer.
Main module current: AC 24 V, 850 mA
-Use the provided adaptor when using DC 12 V. The adaptor is not provided with the AC Smart
IV package sold in the U.S.

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SAFETY PRECAUTIONS
Class A device
NOTES
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own
expense.
CAUTION
Changes or modifications not expressly approved by the manufacturer responsible for
compliance could void the user’s authority to operate the equipment.
Disposal of your old appliance
1. When this crossed-out wheeled bin symbol is attached to a product it
means the product is covered by the European Directive 2002/96/EC.
2. All electrical and electronic products should be disposed of separately
from the municipal waste stream via designated collection facilities
appointed by the government or the local authorities.
3. The correct disposal of your old appliance will help prevent potential
negative consequences for the environment and human health.
4. For more detailed information about disposal of your old appliance,
please contact your city o!ce, waste disposal service or the shop
where you purchased the product.

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PREPARATION
PREPARATION
The following provides information on the AC Smart IV components, how to install and configure, and
other required information necessary to use the product.
AC Smart IV Overview
AC Smart IV is a central controller installed in the management office of a building, or in the
administration office of a school, to monitor and operate, via touch screen or Web access, the
indoor units, ERV (ERV: Energy Recovery Ventilator, ERV DX: Direct Expansion Energy Recovery
Ventilator), DI/DOs, DOKITs, AWHPs, AHUs and I/O Modules installed inside the building. AC Smart
IV can manage, collectively or individually, the indoor units, ERV, DI/DOs, DOKITs, AWHPs and
AHUs for up to 128 devices. (Or the indoor units, ERV, DI/DOs, DOKITs, AWHPs and AHUs for up to
64 devices and 9 I/O Modules)
Components
The following components are included in the package box. Open the box and verify that all
components are included.
AC Smart IV
Power Cord
P/NO : MFL68463901
www.lg.com
Please read this installation manual completely before installing the product.
Installation work must be performed in accordancewith the national wiring standards
by authorized personnelonly.
Please retain this installation manual for future reference after reading it thoroughly.
INSTALLATION/
OWNER’S MANUAL
AIR
CONDITIONER
AC Smart IV
PACS4B000, CACS4B000
ENGLISH
Quick GuidePower AdapterAC Smart IV
User's Manual
Power Cord, Power Adaptor and Quick Guide are not provided with the AC Smart IV package sold in the U.S.

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PREPARATION
NOTES
The figures of the components and optionally purchased products shown may differ from the
actual components and products.
Product Specifications
The product specifications for AC Smart IV are as follows.
Item Specifications
CPU
PCIMX5150D
yARM Cortex A8™ core
y800 MHz
MEMORY 128 x 4 MB (DDR2 SDRAM)
Storage 4GB (INAND FLASH)
LCD 10.2 inch WSVGA (1024 x 600) TFT LCD
Speaker MONO 300 mW
RS485 2 Ports
USB/SD
yMICRO USB 1EA (for external USB memory, for service)
yMINI USB 1EA
ySD Card 1EA
DI 2 Ports
DO 2 Ports
Touch Screen C-Type Touch Panel
Button Key Less than 9 seconds (LCD POWER ON/OFF), 10 seconds (SYSTEM
RESET)
POWER DC 12 V (3.33 A), AC 24 V
OS Linux

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PREPARATION
Features and Functions
The features and functions of AC Smart IV are as follows.
⑦ ⑧
⑪⑩⑨
① ③② ⑥④ ⑤
<Front>
<Bottom>
<Back>
Number Item Description
①Touch Screen y10.2 inch LCD control panel
yAC Smart IV control and information display
②SD Memory Slot SD card memory slot
③DO Port 2CH DO port
④DI Port 2CH DI port
⑤ 485 Port
2CH 485 port (CH1: AHU and MODBUS communication device,
CH2: devices other than AHU and MODBUS communication
device)
⑥DC 12 V Input Port DC 12 V power input port
⑦LAN Port LAN cable port for Ethernet connection (100Mbps/10Mbps)
⑧AC 24 V Input Port AC 24 V power input port
⑨Micro USB Port
(for service)
Port for upgrading software and storing floor plans, reports,
statistics, etc. (It needs cable to connect USB memory sticks,
supporting USB 2.0 or later)
⑩Mini USB Port PC port for debugging software
⑪Power ON/OFF
yPush less than 10 seconds to control AC Smart IV LCD backlight.
yPush 10 seconds or more to reset AC Smart IV.
yIf you are not going to use AC Smart IV for a long time, it is
recommended that the product be turned off to prolong the
LCD backlight's life.

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PREPARATION
Installation and Configuration
This chapter explains how to install and configure AC Smart IV.
Installation
To use AC Smart IV, build an environment for which AC Smart IV can communicate with devices like
the indoor unit, ERV, DI/DO, DOKIT, AWHP, AHU and I/O Module. Use AC Smart IV to register those
devices.
AC Smart IV should be installed in the following order:
STEP 1. Check the installation environment and configure the device
address.
Check the network configuration against the interfaced devices before installing
AC Smart IV and allocate a unique central control address for each connected
device.
STEP 2. Connect V-Net devices with AC Smart IV.
Use an RS485 cable to connect V-Net devices with AC Smart IV.
STEP 3. Login and register the devices.
Login to AC Smart IV and register those devices that have their address set.
CAUTION
The installation of AC Smart IV must be done by a professional. Be sure to contact a qualified
engineer for the installation. If you have a question or request regarding the installation, contact
an installation professional at an authorized LG service center or LG Electronics.

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PREPARATION
Check the installation environment and configure the device address
AC Smart IV can connect up to 128 devices (including indoor units, ERV, DI/DOs, DOKITs, AWHPs,
AHUs) or 64 devices (including indoor units, ERV, DI/DOs, DOKITs, AWHPs ans AHUs) and 9 I/O
Modules.
The following shows an example of connecting AC Smart IV with such devices.
Quantity of
I/O Module
Quantity of
Device
0128
1121
2114
3107
4100
593
686
779
872
964
Quantity of
Device
Quantity of
I/O Module
128
64
9
* Devices : Indoor units, ERV, DI/DOs, DOKITs, AWHPs, AHUs
AC Smart IV connects with PI485 and uses RS485 to communicate and exchange information.
Allocate unique addresses to those devices (internal units, ERV, DI/DOs, DOKITs, AWHPs, AHUs,
I/O Modules) that will connect with AC Smart IV. The addresses are hexadecimal numbers that can
be chosen from 00 to FF.

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PREPARATION
...
AC Smart IV
Outdoor Units
Power Distribution
Indicator (PDI) watt-hour meter
ERV
DI/DO, DOKIT
AWHP
AHU
Indoor devices 1
Configuration
Address: 01
Configuration
Address: 11
Configuration
Address: 21
Configuration
Address: 31
Configuration
Address: 41
Configuration
Address: 02
Configuration
Address: 03
Indoor devices 2 Indoor devices 3
NOTES
yThe maximum allowed communication distance guaranteed by LG Electronics is 1 000 m. It
means that the distance between AC Smart IV and the farthest device should not exceed 1
000 m. It is recommended that the communication cable use 0.75 mm square or more.
yFor indoor units, ERV, DI/DOs, DOKITs, AWHPs, AHUs and I/O Modules, you cannot allocate
identical addresses among devices of the same type. Allocate different addresses for devices
of the same type. (the indoor unit and DOKIT cannot use the same address.)
yEach device which can be used with PDI must be set to a unique address when connected
with PDI. For further information about the devices can be used with PDI, please refer to the
PDI manual.
yConnecting I/O Module, address setting should not be 00 because 00 is used to Broadcast in
MODBUS communication.