LG MFL42540254 Air Conditioner Installation Guide

: June 13, 2024
: LG

Table of Contents

Safety Precautions
Name of each part
Accessory Parts
Installation Method
Setting and using method
Outdoor unit monitoring
Disposal of your old appliance
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

**LG MFL42540254 Air Conditioner Installation Guide

**

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

WARNING
This symbol indicates the possibility of death or serious injury.

CAUTION
This symbol indicates the possibility of injury or damage.

Meanings of symbols used in this manual are as shown below.

Be sure not to do.
Be sure to follow the instruction.

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.

WARNING

During installation

Do not touch the board when the power is connected.
- It can cause a fire, electric shock, explosion, injury and problem to the product.
Always request for installation of the product to the service center or the installation service provider.
- It can cause a fire, electric shock, explosion and injury.
When reinstalling the previously installed product, request for service to the service center or the installation service provider.
- It can cause a fire, electric shock, explosion and injury.
Do not install the product where it can be exposed to rain.
- It can cause problems to the product.
Do not install the product in a humid location.
- It can cause problems to the product.

During use

Do not modify or extend the power cord.
- It can cause a fire and electric shock.
Do not use any flaming devices near the product.
- It can cause a fire.
Do not use any heating devices near the power cord.
- It can cause a fire and electric shock.
Do not pour water inside the product.
- It can cause an electric shock and problem to the product.
When the product is submersed in water, always request for service to the service center or the installation service provider.
- It can cause a fire and electric shock.
Make the children and the elderly use the product with the help of a guardian.
- It can cause a safety accident and problems to the product.
Do not give impact to the product.
- `It can cause problems to the product.

Name of each part

DRY CONTACT FOR DEMAND CONTROL

SW_DIP : Switch to select main function
SW_ADDRESS2 : Switch to set a upper address of the outdoor unit
SW_ADDRESS1 : Switch to set a lower address of the outdoor unit
SW_STEP : Switch to select a control mode.
CN_PWR : DC Input terminal
ERROR : Error display with relay contact
BUS-A : RS-485 (+) Terminal
BUS-B : RS-485 (-) Terminal
CN_CAPACITY : Signal input terminal to control a capacity of outdoor unit
CN_SPEED/CAP : Signal input terminal for Analog Input/Low noise operation
CN_OUT : Outdoor unit connector
LED1 : Display LED for RS-485 status
LED01G,02G,03G : Display LED for communication status
CN_JIG : Connector for writing program
SW1 : Reset switch

Accessory Parts

ODU Dry contact PQDSBCDVM0
BRACKET (1 EA)
SCREW (4 EA)
WIRE ASSY 1(1 EA)
WIRE ASSY 2(1 EA)
WIRE ASSY 3(1 EA)

Others : Tie Wrap (3 EA) – Cable Tie Clamp (1 EA)

If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
Qualified service technician is only possible to access to product.

Minimum cross-sectional area of conductors

Rated current of applianceA	Nominal cross-sectional areamm2

≤ 0.2> 0.2 and ≤ 3> 3 and ≤ 6> 6 and ≤ 10> 10 and ≤ 16> 16 and ≤ 25> 25 and ≤ 32> 32 and ≤ 40> 40 and ≤ 63| Tinsel corda 0.5a0.751.0 (0.75)b1.5 (1.0)b2.54610
a These cords may only be used if their length does not exceed 2 m between the point where the cord or cord guard enters the appliance and the entry to the plug.b Cords having the cross-sectional areas indicated in the parentheses may be used for portable appliances if their length does not exceed 2 m.

Installation Method

Connect the connection wires according to the instructions. (Please refer to Setting and Using Method)
Perform the switch setting according to switch setting method. (Please refer to Setting and Using Method)
Fix the Dry contact on suitable space inside of the outdoor unit.

CAUTION

Install the product on flat surface and screw at least 2 places. Otherwise the Dry contact may not be anchored properly.
Do not screw too tightly. It may cause deformation of the case.
Do not deform the case at random. It may cause malfunction of the Dry contact.

Setting and using method

After change any Dry contact setting, then you must press RESET switch to reflect the setting.

Power source input

When wiring power source from outdoor unit
When using external power source

Notes
This device can accept only DC Power input.
Do not input 220 VAC. Otherwise It will cause a serious damage.

System structure

When outdoor unit has RS-485 communication function (Master Mode)
When outdoor unit doesn’t have RS-485 communication function (Slave Mode)

Notes
This dry contact module is available after Multi V 3 series.

When using ODU Dry contact with Central Control Devices (Slave Mode)

Notes
This dry contact module is available after Multi V 3 series

Connection with Outdoor unit

When outdoor unit has RS-485 communication function (RS-485 Built-in model)
When outdoor unit doesn’t have RS-485 communication function

Setting of input signal

When using contact signal input without external power

Notes
Do not input the voltage signal in “NON VOLT” setting mode otherwise it will cause serious damage

When using contact signal input with external power
When using analog input signal

Notes

When using an analog signal, Central control Devices can not be used together.
Do not use signal cable over 1meter.
Do not change a command too quickly.
Keep the command 30 seconds at least, otherwise it will cause a damage to outdoor unit.
This function is very sensitive to supplied power.
So when using analog inputs, supply a constant-voltage by external power source.

Setting of ‘SW_DIP

Using ‘SW_DIP’, select the option of control function as described below

Notes
Default State is L1: ON, L2: ON

Position	Function
**** ON : Master Mode OFF : Slave Mode
**** No Function
**** ON : On Boarding Mode OFF: No Function

Notes
After change ‘SW_DIP’ setting, then you must press reset switch to reflect the setting

Setting of ‘SW_STEP

Use the ‘SW_SETP’ to set a control step for contact signal input.
- The type of input signal and control step can be set using ‘SW_STEP’
- Type of input signal
  SW_STEP| Input Signal
  ---|---
  0, 1, 2, 3, 4, 5, 6| Contact signal input
  D| Analog input signal
- Detail of the control step for contact signal input

SW_ STEP| Input_1| Input_2| Input3| Comp capacity Of outdoor unit(%)| Type of input
---|---|---|---|---|---
0| 0| 0| 0| No control| Contact signal
1| 0| 0| 70
0| 1| 0| 40
0| 0| 1| COMP OFF
1| 0| 0| 0| No control| Contact signal
1| 0| 0| 70
0| 1| 0| 50
0| 0| 1| COMP OFF
2| 0| 0| 0| No control| **** Contact signal
1| 0| 0| 80
0| 1| 0| 50
0| 0| 1| COMP OFF
SW STEP| Input_1| Input_2| Input_3| Comp capacity Of outdoor unit(%)| Type of input
---|---|---|---|---|---
**** 3| 0| 0| 0| No control| **** Contact signal
1| 0| 0| 70
0| 1| 0| 40
0| 0| 1| ALL OFF
**** 4| 0| 0| 0| No control| **** Contact signal
1| 0| 0| 70
0| 1| 0| 50
0| 0| 1| ALL OFF
**** 5| 0| 0| 0| No control| **** Contact signal
1| 0| 0| 80
0| 1| 0| 50
0| 0| 1| ALL OFF
**** 6| 0| 0| 0| No control| **** Contact signal
1| 0| 0| 50
0| 1| 0| COMP OFF
0| 0| 1| ALL OFF

Detail of the control step for analog input signal

SW_ STEP	Input Voltage	Comp capacity Of outdoor unit(%)	Type of input
******** D	0	No control

**** Analog input
1| 100
2| 90
3| 80
4| 70
5| 60
6| 50
7| 45
8| 40
9| COMP OFF
10| ALL OFF
**** E| 0| COMP OFF
1| 40
2| 45
3| 50
4| 60
5| 70
6| 80
7| 90
8| 100
9| 100
10| 100

Notes

Do not change a command too quickly.
Keep the command 30 seconds at least, otherwise it will cause a damage to outdoor unit.

Setting of ‘SW_ADDRESS’

Use the ‘SW_ADDRESS’ to set an address of outdoor unit

Master Mode use SW_ADDRESS2 to set a group(0~F) If you set a group as “0”, the address of outdoor unit should be “00~0F”
Slave Mode (when using with central control device) use all to set the address of outdoor unit for sending to central control device.

Notes

Using this switch, the address of outdoor unit can be set as 0~254(00~FE)
If the outdoor unit has it’s own address, you need not to set address in slave mode.
After change ‘SW_ADDRESS’ setting, then you must press reset switch to reflect the setting.

Outdoor unit monitoring

Monitoring outdoor unit error :
Refer to below and connect to the control device that you want to control.

Notes

Maximum external power source is recommended as below
AC : 3 A at 250 V
DC : 3 A at 30 V

Disposal of your old appliance

This crossed-out wheeled bin symbol indicates that waste electrical and electronic products (WEEE) should be disposed of separately from the municipal waste stream.
Old electrical products can contain hazardous substances so correct disposal of your old appliance will help prevent potential negative consequences for the environment and human health. Your old appliance may contain reusable parts that could be used to repair other products, and other valuable materials that can be recycled to conserve limited resources.
You can take your appliance either to the shop where you purchased the product, or contact your local government waste office for details of your nearest authorised WEEE collection point. For the most up to date information for your country please see www.lg.com/global/recycling