LG UM42R.N20 User Manual

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P/NO : MFL67939930
INSTALLATION MANUAL
AIR
CONDITIONER
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.
Ceilling Concealed Duct
Original instruction (R32)
[Representative] LG Electronics Inc. EU Representative :
LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA
Copyright © 2017 LG Electronics Inc. All Rights Reserved.
ENGLISH
ITALIANO ESPAÑOL
FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
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Summary of Contents

Page 1 - CONDITIONER

P/NO : MFL67939930INSTALLATION MANUALAIRCONDITIONERwww.lg.comPlease read this installation manual completely before installing the product.Installatio

Page 2 - MODEL DESIGNATION

10ENGLISHINSTALLATION PLACESINSTALLATION PLACESInstall the air conditioner in the location that satisfies the following conditions.- The place shall e

Page 3 - TIPS FOR SAVING ENERGY

ENGLISH11INSTALLATION PLACES- The appliance shall be installed, operated and stored in a room with a floor area larger than the mini-mum area.- Use th

Page 4 - IMPORTANT SAFETY INSTRUCTIONS

12ENGLISHTHE INDOOR UNIT INSTALLATIONPosition of suspension Bolt- Apply a joint-canvas between the unit andduct to absorb unnecessary vibration.- Appl

Page 5

THE INDOOR UNIT INSTALLATIONENGLISH13CAUTION• This air-conditioner uses a drain pump.• Install the unit horizontally using a levelgauge.• During the

Page 6

14ENGLISH- Insert the set anchor and washer onto thesuspension bolts for locking the suspensionbolts on the ceiling.- Mount the suspension bolts to th

Page 7

ENGLISH15THE INDOOR UNIT INSTALLATION700 or less1 -1.5mClamp metal(attached) Drain hose(attached)Drain raising pipe300mm or less300mm or less300mm or

Page 8

16ENGLISHTHE INDOOR UNIT INSTALLATIONPrecautions when laying powerwiringUse round pressure terminals for connectionsto the power terminal block.When n

Page 9 - TABLE OF CONTENTS

ENGLISH17THE INDOOR UNIT INSTALLATIONFlaring WorkMain cause for gas leakage is due to defect offlaring work. Carry out correct flaring work inthe foll

Page 10 - INSTALLATION PLACES

18THE INDOOR UNIT INSTALLATIONENGLISH1 Compare the flared work with the figureby.2 If a flared section is defective, cut it offand do flaring work aga

Page 11 - Minimum floor area

THE INDOOR UNIT INSTALLATIONENGLISH192 Set the tubing cutting line upward. Wrap the area which accommodates therear piping housing section with vinyl

Page 12 - THE INDOOR UNIT INSTALLATION

ENGLISHMODEL DESIGNATION2MODEL DESIGNATION- Product Name : Air conditioner- Model Name :- Additional Information : serial number isrefer to the barcod

Page 13 - Position of console Bolt

20THE INDOOR UNIT INSTALLATIONENGLISHPlease fix tightly using provided screw after placing remote controller setupboard on the place where you like to

Page 14 - Old building New building

REMOTE CONTROLLER INSTALLATIONENGLISH21Please fix remote controller upper partinto the setup board attached to the sur-face of the wall, as the picture

Page 15 - Wiring Connection

22ENGLISHREMOTE CONTROLLER INSTALLATIONWired remote controller installationSince the room temperature sensor is in the remote controller, the remote c

Page 16 - Precautions when laying power

OPTIONAL OPERATIONENGLISH23Installer Setting -Test Run ModeAfter installing the product, you must run a Test Run mode. For details related to this ope

Page 17 - Flaring Work

24OPTIONAL OPERATIONENGLISHInstaller Setting - Setting Address of Central ControlIt's the function to use for connecting central control.Please r

Page 18 - Indoor unit drain hose

OPTIONAL OPERATIONENGLISH25Installer Setting -ThermistorFunction Code Thermistor settingSet Thermistor value by pressing button. (01: Remote Controlle

Page 19

26OPTIONAL OPERATIONENGLISHInstaller Setting -Ceiling Height SelectionThis function is to adjust FAN Airflow rate according to ceilingheight (only cas

Page 20 - <Wire guide grooves>

OPTIONAL OPERATIONENGLISH27Installer Setting-Group SettingIt is a function for settings in group control, or 2-remote controller control.Function Code

Page 21 - <Separating order>

28OPTIONAL OPERATIONENGLISHFunction Code Dry Contactsetting valueSelect Dry contact setting by pressing button. (00 : Automatic, 01 : manual)3Press

Page 22 - Sun ray contact area

OPTIONAL OPERATIONENGLISH29Installer Setting-Celsius / Fahrenheit SwitchingThis function is used for switching the display between Celsius and Fahrenh

Page 23 - OPTIONAL OPERATION

TIPS FOR SAVING ENERGYENGLISH3• Do not cool excessively indoors. This may be harmful for your health and may consume moreelectricity.• Block sunligh

Page 24 - Indoor No

30OPTIONAL OPERATIONENGLISHInstaller Setting -Optional Function SettingSetting feature for indoor unit when air cleaning / heater / humidifier / Up/do

Page 25 - Installer Setting -Thermistor

OPTIONAL OPERATIONENGLISH31Installer Setting - Remote controller Mode LockThis function is used to limit ‘operation-mode’ selection setting.code Descr

Page 26

32HOW TO SET E.S.P?ENGLISHInstaller Setting -E.S.P.This is the function that decides the strength of the wind for each wind level and because thisfunc

Page 27

HOW TO SET E.S.P?ENGLISH33- Please be careful not to change the ESP value for each fan step.- It does not work to setup ESP value for very low/power s

Page 28

34HOW TO SET E.S.P?ENGLISHInstaller Setting - Static Pressure Step SettingThis function is applied to only duct type. Setting this in other cases will

Page 29

HOW TO SET E.S.P?ENGLISH35Ceiling Concealed Duct – Low staticTable 1NOTE!1. The above table shows the correlation between the air rates and E.S.P.2. B

Page 30

36HOW TO SET E.S.P?ENGLISHCeiling Concealed Duct – Mid staticTable 2Model Step CMMStatic Pressure[mmAq(Pa)]2(20) 2.5(25) 3(29) 4(39) 6(59) 8(78) 10(98

Page 31

HOW TO SET E.S.P?ENGLISH37NOTE!1. Be sure to set the value refering table 2. Unexpected set value will cause mal-function.2. Table 2 is based at 230V.

Page 32 - HOW TO SET E.S.P?

38SELF-DIAGNOSIS FUNCTIONENGLISHSELF-DIAGNOSIS FUNCTIONIndoor Unit ErrorEx) Error 03 (Remote controller error)3 Times 3 Times 3 Times2 s LED02G(GREEN)

Page 33

DIP SWITCH SETTINGENGLISH39DIP SWITCH SETTINGIndoor PCBIndoor PCBIndoor PCBFunction Description Setting Off Setting On DefaultSW3 Group ControlSelecti

Page 34 - Existing condition

4IMPORTANT SAFETY INSTRUCTIONSENGLISHIMPORTANT SAFETY INSTRUCTIONSREAD ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.Always comply with the following pr

Page 35

40ENGLISH

Page 37

5ENGLISHIMPORTANT SAFETY INSTRUCTIONSInstallation• Always perform grounding. - Otherwise, it may cause electricalshock. • Don’t use a power cord, a pl

Page 38 - SELF-DIAGNOSIS FUNCTION

ENGLISHIMPORTANT SAFETY INSTRUCTIONS6• The appliance shall be stored in a well-ventilated area wherethe room size corresponds to the room area as spec

Page 39 - DIP SWITCH SETTING

IMPORTANT SAFETY INSTRUCTIONSENGLISH7• Never touch the metal parts of the unit when removing thefilter. - They are sharp and may cause injury.• Do not

Page 40

8IMPORTANT SAFETY INSTRUCTIONSENGLISH• Always inspect gas leakage after the installation and repair ofproduct. - Otherwise, it may cause the failure o

Page 41

ENGLISH92 MODEL DESIGNATION3 TIPS FOR SAVING ENERGY4 IMPORTANT SAFETY INSTRUCTIONS10 INSTALLATION PLACES12 THE INDOOR UNIT INSTALLATION12 Position of

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