LG PREMTB10U Guide

Installation & Operation
LG Programmable Thermostat
www.lg.com
P/NO : MFL62129209
Type : LG Programmable Thermostat
Models : PREMTB10U
• Please read this Installation manual completely before installing the
product.
• Installation work must be performed in accordance with the national
wiring standards and local code by authorized personnel only.
• Please retain this manual for future reference after reading it thor-
oughly.
ENGLISH FRANÇAIS ESPAÑOL

2TIPS FOR SAVING ENERGY
ENGLISH
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize power consumption when you use the air condi-
tioner. You can use your air conditioner more efficiently by referring to the instructions below:
• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air con-
ditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block
the air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :

IMPORTANT SAFETY INSTRUCTIONS
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.
• The information contained in this 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 read and follow all instructions in this manual carefully can result in equipment mal-
function, property damage, personal injury, and/or death.
Installation
• For electrical work, contact the dealer, seller, a qualified electrician, or an authorized service
Center. Do not disassemble or repair the product. There is risk of fire, electric shock, explo-
sion, equipment malfunction, or injury.
• When installing or reinstalling this product, contact a service center or qualified electrician for
all services. Failure to do so may result in a risk of fire, electric shock, explosion, equipment
malfunction, or injury.
• Do not disassemble, fix, and modify products randomly. There is risk of fire, electric shock,
explosion, equipment malfunction, or injury.
• The product shall be installed according to the national standards and local code.
• Apply totally enclosed noncombustible conduit in case of local building code requiring plenum.
In-use
• Do not place flammable substances (such as gasoline, paint thinner, etc…) close to the prod-
uct. There is a risk of fire, electric shock, explosion, equipment malfunction, or injury.
• Do not allow water to run into the product. If the product gets wet, request the dealer, seller,
a qualified electrician, or an authorized Service Center to repair it. Failure to do so may result
in a risk of fire, electric shock, explosion, equipment malfunction, or injury.
• Do not give hit or use sharp or pointed objects on the product. There is a risk of fire, electric
shock, explosion, equipment malfunction, or injury.
!
!
!
3
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IMPORTANT SAFETY INSTRUCTIONS
4
ENGLISH
• Do not touch or pull the lead wire with wet hands. There is risk of product breakdown or electric
shock.
CAUTION
In-use
• Do not clean using powerful detergents like solvent; instead, use soft cloths and mild detergents.
Failure to do so may result in a risk of fire, electric shock, explosion, equipment malfunction, or de-
formation.
• Do not press too hard on the thermostat's screen, as it may result in a malfunctioning product.
!

TABLE OF CONTENTS
2 TIPS FOR SAVING EN-
ERGY
3 IMPORTANT SAFETY IN-
STRUCTIONS
7 PART DESCRIPTION
12 OPERATION
INSTRUCTION
12 Standard Operation - Cooling Mode
13 Standard Operation - Power Cooling
14 Standard Operation - Heating Mode
15 Standard Operation - Dehumidification
Mode
16 Standard Operation - Fan Mode
17 Standard Operation - Auto Operation
Mode
19 Standard Operation - Timed Override
20 Standard Operation - Set back
21 Standard Operation - Hold
22 Standard Operation – Temperature
Setting
23 Standard Operation - Airflow Setting
24 Sub Function - Plasma Purification
25 Sub Function - Energy-Saving Cooling
Operation
26 Sub Function - Automatic Drying
27 Sub Function - Electric Heater
28 Sub Function - Humidifier
29 Sub Function - Fan Auto
30 Function Setting - Vane Angle Control
31 Function Setting - Elevation Grill
32 Function Setting - Child Lock
33 Function Setting - Minimum Difference
between heating and cooling Set
points
34 Function setting - Changing Current
Time
36 Function Setting - Override set time
37 Function Setting - Set back tempera-
ture
38 Function Setting - Filter Sign Clear
39 Programming - Simple Reservation
40 Programming - Sleep Reservation
41 Programming - Weekly Reservation
48 Programming - Weekly Reservation
Schedule Copy/Paste
49 Programming - Holiday Reservation
50 Programming - Delete All Reservation
51 Different mode drive
52 Ventilation Product - lnterlocked Air
conditioner and Ventilator
53 Ventilation Product - lnterlocked oper-
ation with general Ventilator
54 Ventilation Product Function Settings
54 Ventilation Product - Ventilator single
operation
55 Ventilation Product Reservations
Settings
56 Troubleshooting Mode Self Diagnosis
57 Checkups before reporting breakdown
58 INSTALLATION METHOD
61 Thermostat installation
62 GROUP CONTROL
63 INSTALLATION IN-
STRUCTIONS
63 Installer Setting - How to enter installer
setting mode
67 Installer Setting - Test Run Mode
68 Installer Setting - Setting Address of
Central Control
5
TABLE OF CONTENTS
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6TABLE OF CONTENTS
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69 Installer Setting - E.S.P. Function
71 Installer Setting - Thermistor
72 Installer Setting - Ceiling Height Selec-
tion
73 Installer Setting - Static Pressure Set-
ting
74 Installer Setting - Override
Master/Slave Setting
75 Installer Setting - Dry Contact Mode
Setting
76 Installer Setting - Fahrenheit / Celsius
Switching
77 Installer Setting - Emergency Heater
Setting
79 Installer setting – Function setting in
group control
80 Installer Setting - Option Function Set-
ting
81 Installer setting – Check indoor unit
Address Number
82 Installer setting – Use Refrigerant leak-
age Sensor
83 Installer Setting – Setting temperature
range
84 Installer Setting - Static Pressure Step
Setting
85 Installer setting – Guard timer
86 Installer setting – Set point range Lock
88 Installer setting – Fan operation in the
cooling mode and thermal off condi-
tions
89 Installer setting – Primary Heater con-
trol setting
90 Installer setting – Hold Enable / Dis-
able
91 Installer setting – Air conditioner Fan
operation interlocked with ventilation
92 Installer setting – Indoor unit Auto-
Start setting
93 Installer setting – Occupancy Duration
Time Setting

PART DESCRIPTION 7
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Accessory
Name and Function of Thermostat
PART DESCRIPTION
1Operation indication screen
2Set temperature button
3Fan Speed button
4Set back button
5Operation mode selection button
6Wireless Thermostat receiver
- Some product don’t receive the wireless
signals.
7Sub function button
8Ventilation button
9Reservation button
10 Air flow button
11 Desired cooling temperature
12 Function setting button
13 Up, Down, Left, Right button
14 On/Off button
15 Desired heating temperature
16 Setting/Cancel button
17 Exit button
1
7
8
9
10
11
13
12
14
15
16
17
2
3
4
5
6
hSome functions may not be operated and displayed depending on the product type.
Connection Cable
(1EA, 32ft (10m))
Screw
(4 EA)
Installation & Operation
Manual

8PART DESCRIPTION
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Icon description
Function Icon Description
Operation
mode
Auto mode
- Product automatically switches between cooling and heating modes.
Cooling mode
- Product is running cooling mode.
Dehumidification Mode
- Product is running dehumidifying mode.
Heating mode
- Product is running heating mode.
Fan only operating mode
- Product is running only the fan for ventilation.
Sub
function
Plasma Purification
- Product is operating Plasma Purification filter.
Energy-Saving Cooling Operation
- Product is running cooling mode in limited set temperature for energy
savings.
Automatic Drying
- Indoor unit operates in the Automatic drying mode.
Electric Heater
- Product operates electric heater in heating mode.
Humidifier
- Product operates in the Humidifier mode.
Fan Auto function
- Indoor unit enables fan auto function.
- Indoor unit doesn’t operate fan when compressor is off.

PART DESCRIPTION 9
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Function Icon Description
Tempera-
ture
Current temperature
- Display current room temperature.
Cooling set point temperature
- temperature set point for cooling operation.
Heating set point temperature - temperature set point for heating oper-
ation.
Fan Speed
Displays current fan speed.
POW : Fan speed - power
HIGH : Fan speed - high
MED : Fan speed - medium
LOW : Fan speed - low
SLO : Fan speed - weak
AUTO : Fan speed - automatic
Air Flow
Louver up-down swing
- Operates the indoor unit's louver up-down swing.
Louver left-right swing
- Indoor unit louver operates left-right swing.
Louver Swirl swing
- Operates the indoor unit's paired cross-swing.
Controller
mode
Schedule operation mode(Simple / sleep/ week / holiday)
- Controller operates in accordance with a set schedule.
Temporary mode
- Setting mode changes temporarily.
Schedule override mode
- Occupied/unoccupied state change.
Set back operation mode
- Controller operates set back operation.
Product
state
monitoring
Command received from central controller or outdoor unit
Slave indoor unit on a heat pump system. Prevents changing to a mode
not compatible with the current outdoor unit mode.
Outdoor unit running
Indoor unit pre-heating operation running
Defrost operation running
Function not applied

10 PART DESCRIPTION
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Function Icon Description
Schedule
Simple schedule in operation
Sleep schedule in operation
Weekly schedule in operation
Holiday schedule in operation
Schedule
& Time
Day of the week
The number of weekly reservation event(s)
Time - AM/PM
Time – value of hour / minute
minute / hour
Turn on/off by schedule
Display weekly schedule occupied / unoccupied state
Weekly schedule data copy / paste
Function
setting
Louver angle setting step
1,2,3,4,ALL : Louver number / STD: Standard angle set
Louver angle state
Elevation grill setting step

PART DESCRIPTION 11
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Function Icon Description
Function
setting
Grill state : up / : stop / : down
Child lock setting step
:Child lock set / : Child lock cancel
Minimum difference value setting step between
cooling / heating set points
Current time setting step
Schedule override timer setting step
Default Set back cooling / heating temperature set points setting step
Filter sign clear setting step
Indoor unit air filter cleaning alarm

12 OPERATION INSTRUCTION
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Standard Operation - Cooling Mode
Press button to turn on the
indoor unit.
1
Press button to select
Cooling operation mode.
2
Adjust the desired temperature
by pressing buttons.
When setting the desired
temperature higher than room
temperature, the fan will blow
room temperature air instead of
cold air.
3
What is the three-minute delay function?
The function of the three minute delay is to protect the compressor by delaying the output
of cool air if the cooling mode is interrupted.
Cooling mode restarts after 3 minutes when the compressor starts to operate.
• For Option 2, when setting the desired temperature in the upper range of 87-99 °F (30.5-
37.5 °C), the indoor unit will shut off if the indoor temperature is lower than the desired
temperature.
• When using a central controller, a displayed value of the desired temperature may differ
depending on a function of the product.
• If indoor unit has 2set point function selected, unit will turn off thermal once the desired
set point is achieved.
OPERATION INSTRUCTIONS
hSetting temperature range :
Option 1. 64~86 °F (18~30 °C) (default setting)
Option 2. 64~99 °F (18~37.5 °C)
Option 3. 50~99 °F (10~37.5 °C) (if connecting
to indoor unit with 2set point function)

OPERATION INSTRUCTION 13
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Standard Operation - Power Cooling
Press button to turn on the
indoor.
1
Press button to select
cooling operation mode.
2
Press button until ’Po’ is
displayed.
3
What is Power Cooling?
Power cooling cools the room quickly by blowing cold air at the powerful setting until the
room reaches 64 °F (18 °C).
hSome products do not have power air-cooling function.

14 OPERATION INSTRUCTION
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Standard Operation - Heating Mode
Press button to turn on the
indoor.
1
Press button to select
Heating mode.
2
Adjust the desired temperature
by pressing buttons.
When setting the desired
temperature lower than room
temperature, there is only
ventilation wind" should be "the fan
will blow room-temperature air.
3
• Heating drive only operates on cooling and heating models.
• Heating doesn't operate on cooling only models.
• For option 2, when setting the desired temperature between 40-59 °F (4-15.5 °C), the in-
door unit shuts off if the indoor temperature is higher than the desired temperature.
• When using a central controller, a displayed value of the desired temperature may differ
depending on the function of the product.
• If indoor unit has 2set point function selected, unit will turn off thermal once the desired
set point is achieved.
hSetting temperature range:
Option 1: 60-86 °F (16-30 °C) (default setting)
Option 2: 40-86 °F (4-30 °C)

OPERATION INSTRUCTION 15
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Standard Operation - Dehumidification Mode
Press button to turn on the
indoor.
1
Press button to select
dehumidification mode.
(The temperature setting
cannot be adjusted during
this mode)
2
• In rainy season or high humidity climates, it is possible to operate dehumidifier and cooling
mode simultaneously to remove humidity effectively.
• The menu item of fan speed unavailable, depending on the product.

16 OPERATION INSTRUCTION
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Standard Operation - Fan Mode
Press button to turn on the
indoor.
1
Press button to select fan
mode.
2
• Fan mode only provides ventilation, it does not provide cool air.
• The menu item of fan speed may be unavailable depending on the unit.

OPERATION INSTRUCTION 17
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Standard Operation - Auto Operation Mode
Press button to turn on the
indoor.
1
Press button to select
Auto operation mode.
2
Press the button to select the
cooling set point, and set the cooling
set point by pressing the button .
3
Press the button to select the
heating set point, and set the heating
set point by pressing the button .
4
Cooling operation state Heating operation state
For the case of cooling exclusive, you can adjust the temperature from hot to cold, from
"-2" to "2" based on "0".
2 : When cold
1 : When cool
0 : When appropriate
-1 : When warm
-2 : When hot

18 OPERATION INSTRUCTION
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• Auto heating drive only operates on cooling and heating models.
• Auto heating doesn’t operate on cooling only models.
• 87~99 °F (30.5~37.5 °C) When setting the desired cooling temperature, the indoor unit
shuts off on condition that the indoor temperature is lower than the desired temperature.
• 40~59 °F (4~15.5 °C) When setting the desired heating temperature, the indoor unit shuts
off on condition that the indoor temperature is higher than the desired temperature.
• When using a central controller, a displayed value of the desired temperature may differ
depending on a function of the indoor unit.
• If indoor unit has 2set point function selected, unit will turn off thermal once the desired
set point is achieved.

OPERATION INSTRUCTION 19
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Standard Operation - Timed Override
Timed override operation temporarily changes the occupied/unoccupied schedule for override
time.
- It reverts to the last occupied schedule in unoccupied override.
- It reverts to the last unoccupied schedule in occupied override.
- You can set ‘Override time’ by ‘Function setting – Override set time’
Press button for 3 seconds, you
can operate timed override.
1
Operate Timed override
Cancel Timed override
Press button for 3 seconds in Timed
override mode, you can cancel Timed
override.
-
It reverts to the last weekly reservation schedule.
• It reverts to the default operation setting if the Thermostat does not have the last occu-
pied schedule in unoccupied override.
- The default operation setting is Auto operation mode with 86 °F (30 °C) for the cool set
point and 60 °F (16 °C) for the heat set point.
• It reverts to set back operation setting if Thermostat does not have last unoccupied sched-
ule in occupied override.
- Set back operation setting: Auto operation mode / set back setting temperature: function
setting – set back temperature.
• It can be canceled if the Thermostat receives a command from another controller.
• When changes occur in the setting by a daytime reservation operation, the schedule over-
ride mode gets deactivated.

20 OPERATION INSTRUCTION
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Standard Operation - Set back
Set back operation reverts to the last unoccupied schedule until Set back operation is canceled.
• It changes to ‘function setting - set back setting’ if Thermostat doesn’t have last unoccupied
schedule.
- Set back operation setting :
Auto operation mode / Set back setting temperature: Function setting – Set back temperature
Operate set back mode
Cancel set back mode
Press button in set back mode, you will
cancel set back operation.
- It reverts to the last weekly reservation schedule.
Press button, you can operate set back
mode.
• You cannot change the setting in set back mode, except to cancel the set back mode.
- ‘HL’ lock is displayed on the window.
• It can be canceled if the Thermostat receives command from another controller.
• When the set back mode is deactivated, the following take place:
- The set points will go to the current occupied set points.
- The default occupied setting will be Auto with 86 °F (30 °C) for the cool set point and
60 °F (16 °C) for the heat set point.