LG PREMTB10U Programmable Thermostat

Specifications

• Type: LG Programmable Thermostat
• Models: PREMTB10U
• P/NO: MFL62129209

Product Usage Instructions

Standard Operation – Cooling Mode
To use the thermostat in cooling mode, follow these steps:

1. Press the Mode button until the cooling mode is selected.
2. Set the desired temperature using the temperature up/down buttons.
3. Press the Fan button to select the desired fan speed.
4. Press the Power button to turn on the air conditioner.

Standard Operation – Power Cooling
To use the thermostat in power cooling mode, follow these steps:

1. Press the Mode button until the power cooling mode is selected.
2. Set the desired temperature using the temperature up/down buttons.
3. Press the Fan button to select the desired fan speed.
4. Press the Power button to turn on the air conditioner.

Standard Operation – Heating Mode

To use the thermostat in heating mode, follow these steps:

1. Press the Mode button until the heating mode is selected.
2. Set the desired temperature using the temperature up/down buttons.
3. Press the Fan button to select the desired fan speed.
4. Press the Power button to turn on the air conditioner.

Standard Operation – Dehumidification Mode

To use the thermostat in dehumidification mode, follow these steps:

1. Press the Mode button until the dehumidification mode is selected.
2. Set the desired humidity level using the humidity up/down buttons.
3. Press the Fan button to select the desired fan speed.
4. Press the Power button to turn on the air conditioner.

Standard Operation – Fan Mode

To use the thermostat in fan mode, follow these steps:

1. Press the Mode button until the fan mode is selected.
2. Press the Fan button to select the desired fan speed.
3. Press the Power button to turn on the air conditioner.

Standard Operation – Auto Operation Setting

To use the thermostat in auto operation setting mode, follow these steps:

1. Press the Mode button until the auto operation setting mode is selected.
2. Set the desired temperature range using the temperature up/down buttons.
3. Press the Fan button to select the desired fan speed.
4. Press the Power button to turn on the air conditioner.

Frequently Asked Questions (FAQ)

Q: How can I save energy when using the thermostat?
A: Here are some tips for saving energy when using your air conditioner:

• Keep doors and windows closed to prevent cool air from escaping.
• Set the temperature to a comfortable level, not too cold or too hot.
• Use the thermostat’s energy-saving features, such as the auto operation setting.
• Regularly clean or replace air filters to maintain efficient airflow.

Q: Where can I find the model and serial numbers?
A: The model and serial numbers can be found on a label on the side of each unit.

Q: How can I enter installer setting mode?
A: To enter installer setting mode, follow these steps:

1. Press and hold the Installer button for 5 seconds.
2. Use the up/down buttons to navigate through the installer settings.
3. Press the Enter button to select a setting.

Installation & Operation
LG Programmable Thermostat
· 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 thoroughly.
Type : LG Programmable Thermostat Models : PREMTB10U

P/NO : MFL62129209

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2 TIPS FOR SAVING ENERGY
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize power consumption when you use the air conditioner. 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 :

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IMPORTANT SAFETY INSTRUCTIONS 3
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, explosion, 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 product. 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.

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4 IMPORTANT SAFETY INSTRUCTIONS · 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 deformation.
· Do not press too hard on the thermostat’s screen, as it may result in a malfunctioning product.

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2 TIPS FOR SAVING ENERGY
3 IMPORTANT SAFETY INSTRUCTIONS
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 temperature
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 operation 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

69 Installer Setting – E.S.P. Function

83 Installer Setting ­ Setting temperature

71 Installer Setting – Thermistor

range

84 Installer Setting – Static Pressure Step

72 Installer Setting – Ceiling Height Selec-

Setting

tion

73 Installer Setting – Static Pressure Set-

85 Installer setting ­ Guard timer

ting

86 Installer setting ­ Set point range Lock

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 Setting
81 Installer setting ­ Check indoor unit Address Number

88 Installer setting ­ Fan operation in the cooling mode and thermal off conditions
89 Installer setting ­ Primary Heater control setting
90 Installer setting ­ Hold Enable / Disable
91 Installer setting ­ Air conditioner Fan operation interlocked with ventilation
92 Installer setting ­ Indoor unit AutoStart setting
93 Installer setting ­ Occupancy Duration Time Setting

82 Installer setting ­ Use Refrigerant leakage Sensor

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PART DESCRIPTION
Name and Function of Thermostat

PART DESCRIPTION 7

1 Operation indication screen 2 Set temperature button 3 Fan Speed button 4 Set back button 5 Operation mode selection button 6 Wireless Thermostat receiver
– Some product don’t receive the wireless signals.
7 Sub function button 8 Ventilation button 9 Reservation 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

h Some functions may not be operated and displayed depending on the product type.

Accessory

Connection Cable (1EA, 32ft (10m))

Screw (4 EA)

Installation & Operation Manual

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PART DESCRIPTION

Icon description

Function

Icon

Description

Auto mode – Product automatically switches between cooling and heating modes.

Operation mode
Sub function

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.
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.

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PART DESCRIPTION 9

Function
Temperature

Icon

Description

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 operation.

Fan Speed
Air Flow
Controller mode

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
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.
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.

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.

Product state
monitoring

Outdoor unit running Indoor unit pre-heating operation running

Defrost operation running

Function not applied

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10 PART DESCRIPTION

Function

Icon

Description

Simple schedule in operation

Schedule

Sleep schedule in operation Weekly schedule in operation

Holiday schedule in operation

Day of the week

Schedule & Time
Function setting

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 Louver angle setting step 1,2,3,4,ALL : Louver number / STD: Standard angle set Louver angle state Elevation grill setting step

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PART DESCRIPTION 11

Function

Icon Grill state

: up /

Description : stop / : down

Child lock setting step

Function setting

: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

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12 OPERATION INSTRUCTION
OPERATION INSTRUCTIONS
Standard Operation – Cooling Mode
1 Press button to turn on the indoor unit.
2 Press button to select Cooling operation mode.
3 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.
h Setting 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)
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 (30.537.5 °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.

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Standard Operation – Power Cooling

OPERATION INSTRUCTION 13

1 Press button to turn on the indoor.

2 Press

button to select

cooling operation mode.

3 Press button until ‘Po’ is displayed.

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).
h Some products do not have power air-cooling function.

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14 OPERATION INSTRUCTION
Standard Operation – Heating Mode
1 Press button to turn on the indoor.
2 Press button to select Heating mode.
3 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. h Setting temperature range: Option 1: 60-86 °F (16-30 °C) (default setting) Option 2: 40-86 °F (4-30 °C)
· 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.

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OPERATION INSTRUCTION 15
Standard Operation – Dehumidification Mode
1 Press button to turn on the indoor.
2 Press button to select dehumidification mode. (The temperature setting cannot be adjusted during this mode)
· 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.

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16 OPERATION INSTRUCTION
Standard Operation – Fan Mode

1 Press button to turn on the indoor.

2 Press mode.

button to select fan

· Fan mode only provides ventilation, it does not provide cool air. · The menu item of fan speed may be unavailable depending on the unit.

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OPERATION INSTRUCTION 17
Standard Operation – Auto Operation Mode

1 Press button to turn on the indoor.

2 Press button to select Auto operation mode.

3 Press the button

to select the

cooling set point, and set the cooling

set point by pressing the button .

4 Press the button

to select the

heating set point, and set the heating

set point by pressing the button .

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

Cooling operation state

Heating operation state

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18 OPERATION INSTRUCTION · 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.

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OPERATION INSTRUCTION 19
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’ byFunction setting ­ Override set time’
Operate Timed override
1 Press button for 3 seconds, you can 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 occupied 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 schedule 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 override mode gets deactivated.

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OPERATION INSTRUCTION

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

Press mode.

button, you can operate set back

Cancel set back mode

Press

button in set back mode, you will

cancel set back operation.

– It reverts to the last weekly reservation schedule.

· 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.

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OPERATION INSTRUCTION 21
Standard Operation – Hold
It is a function that holds the current mode of operation. – If it is on hold, daytime schedule cannot be programmed. – If it is on hold, current room temperature does not display.

Operate Hold mode.

Press

button for 3 seconds,

you can operate `Hold’ function.

Cancel Hold mode.

Press

button for 3 seconds in `Hold’,

you can cancel `Hold’.

If Hold mode is cancelled with daytime

schedule programmed, it runs the latest

schedule.

· You can’t change setting in Hold’ except cancel theHold’

· It can be canceled, if the thermostat receives a command from another controller. · When commands are received by other controllers, the Hold mode gets deactivated.

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22 OPERATION INSTRUCTION
Standard Operation ­ Temperature Setting
1 Press the buttons to adjust the desired temperature. In Auto mode, adjust cooling and heating set points individually by pressing the cool or heat set point selection button. : Increase Temp. per one time pressing : Decrease Temp. per one time pressing
· Set temp: Indicates the temperature that user wants to set.
Cooling operation: – The cooling mode doesn’t work if desired
temperature is higher than room temperature. Please lower the desired temperature. Heating operation: – The heating mode doesn’t work if desired temperature is lower than room temperature. Please increase the desired temperature.
Checking the room temperature
When Thermostat is running, the room temperature will be displayed on the screen.
Room temperature display range Fahrenheit: 33-9°F – below 32°F: displays LO’ – over 100°F: displaysHI’ Celsius: 1-39°C – below 0°C: displays LO’ – over 40°C: displaysHI’ – Because of location of temperature sensing,
the real room temperature and this displayed value can be different.
· For air-cooling set point, from 64~86 °F (16~30 °C), and for heating set point, from 60~86 °F (16~30 °C), you can select desired temperature. h A temperature area of extended range can be selected through desired temperature range setting option. – Cooling : 64~99 °F (16~37.5 °C) / Heating : 40~86 °F (4~30 °C)
· 10°F is proper for the difference between room and outside temperature. – When combined with other controllers, the temperature displayed on each controller may differ.
· For indoor temperatures below 50 °F (10 °C), the value perceived by the Thermostat (with cable) is displayed.

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Standard Operation – Airflow Setting

OPERATION INSTRUCTION 23

Fan speed : You can simply adjust desired fan speed.
1 Please set up desired fan speed by fan speed button. · Every time you press fan speed, you can select the fan speed in order of `SLO LOW MED HIGH POW AUTO’. · The menu item may be unavailable according to product function. · Please refer to the product manual for product’s detailed function.

Wind direction : You can simply adjust desired wind direction.
2 Please set desired wind direction by pressing button. You can select wind direction of (Up/Down and Left/Right ª Left/Right ª Up/Down ª Clear ª Swirlª Clear ) by pressing button. The menu item may be unavailable according to product function. Please refer to product manual for product’s detailed function.

Airflow Setting Table Symbol

Description

Left-Right : Vanes move from left to right automatically and continuously

Up-Down : Vanes move from up to down automatically and continuously

Swirl : Paired Vanes oscillate in 1 minute interval

h Some functions may not be operated and displayed depending on the indoor unit type.

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24 OPERATION INSTRUCTION
Sub Function – Plasma Purification
Only products with Plasma Purification function can use this.
The method to set up plasma purification
1 Press button until icon flashes.
2 Operate or cancel Plasma Purification function by pressing button.

3 After setting, press to exit.

button

After setup, it automatically exits after 25 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

· Plasma purification is an additional function and it might not be available on all types of indoor unit.
· This plasma purification is possible only when the indoor unit is running. To using plasma purification without cooling or heating , you can run plasma purification function on fan mode.

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OPERATION INSTRUCTION 25
Sub Function – Energy-Saving Cooling Operation
Energy-Saving Cooling Operation is the function to improve user’s comfort and power saving capacity by adjusting the desired temperature while running air- cooling. When operating cooling, setting the Energy-saving cooling function is available. h Except for cooling operated by the auto mode.

1 Press

button until

flashes.

2 Operate or cancel Energy-saving cooling function by pressing button. (To cancel Energy-saving cooling function, move to Energy-saving cooling menu by pressing button, and the function is canceled by pressing again.

3 Press button to exit. After setup, it automatically exits after 25 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

· Energy-saving cooling is only available for the cooling mode. · Energy- saving cooling function might not be available on all indoor units.

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26 OPERATION INSTRUCTION
Sub Function – Automatic Drying
It is the function that dries the inside of an indoor unit when the indoor unit is OFF, and allows for the Fan to operate for a certain time in order to prevent mold and moisture. This function is only available on some indoor units.
The method to setup Automatic Drying
1 Press button until icon flashes.
2 Operate or cancel Automatic Drying function by pressing button.

3 After setting, press to exit.

button

After setup, it automatically exits

after 25 seconds if there is no

input. If the Setting/Cancel

button is not pressed, the mode

will not change.

· Automatic dry function might not be available on all indoor units.

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OPERATION INSTRUCTION 27
Sub Function – Electric Heater
It is a function to allow auxiliary heating ability by turning on the electric heater during the heating operation. It can only be set during Heating operation or Auto(heating mode) operation.
1 Press button until icon flashes.
2 Turn on/off electric heater by pressing button (the icon will be displayed when electric heat is enabled).
3 Press button to exit. After setup, it automatically exits after 25 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.
· Heater function is additional function and it might not be available on all indoor units. · The indoor unit product with Auxiliary Heater function set automatically displays 0 icon
during the heating operation.
· When using non-heat recovery outdoor unit, emergency heater can be turned on for simultaneous heating and cooling. Indoor units with the emergency heater must be turned OFF for simultaneous cooling and heating. h Heater function is additional function and it only operates in selected models.
· Electric heater icon is displayed in the LCD display window with error code when emergency heater is on while in error. h Exceptions: Error codes 1, 3, 9, and 10 h If the previous mode of the Indoor unit is COOL,DRY,FAN ONLY mode, heater must be turned on manually.

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28 OPERATION INSTRUCTION
Sub Function – Humidifier
Only products with humidifying function can use this.
1 Press button until icon flashes.
2 Turn on/off humidifier by pressing button (the icon will be displayed when humidifier is enabled).
3 Press button to exit. After setup, it automatically exits after 25 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.
· Humidifier function is additional function and it might not be available on all indoor units.

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OPERATION INSTRUCTION 29
Sub Function – Fan Auto
It is the function that operates the fan when the outdoor unit is running. Only indoor units with fan auto function can use this.
The method to set up Fan auto function
1 Press button until icon flashes.
2 Operate or cancel Fan Auto function by pressing button.

3 After setting, press to exit.

button

After setup, it automatically exits

after 25 seconds if there is no

input. If the Setting/Cancel

button is not pressed, the mode

will not change.

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30 OPERATION INSTRUCTION
Function Setting – Vane Angle Control
This function is to adjust airflow angle.
1 Press button until icon flashes.

2 Press

button to select active vane :

1 / 2 / 3 / 4 / All / Standard

Select Vane number using

buttons.

Vane number : No. 1, 2, 3, 4, all, or standard – Selected vane is in operation. – Please verify the operating vane. – To set the angle of all the vanes, select ‘all’. – To set as the factory default settings, select ‘standard’.

3 Select wind angle using and press button.

buttons,

– The boundary of wind angle settings can

be changed to 5 levels or 6 levels

according to the product.

– When selecting ‘standard’ for Vane

number, the wind angle does not move.

4 Set the air flow angles for the remaining vanes as the same as above. Some indoor units only have vane numbers 1 and 2.

5 Press button to complete and active the setting process. (Airflow direction function will be released whenever setting vane angle)
6 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

· While adjusting the vane angle, a command from central controller, wireless remote controller or dry contact, etc shall not be reflected in the system for 1 minute.

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OPERATION INSTRUCTION 31
Function Setting – Elevation Grill
This function is to move the indoor filter up/down for cleaning filter.
1 Press button until icon flashes.

2 Move to descent using

buttons

and press button will display

descent icon and the grill with the filter

will descend.

3 When the up/down grill descends to the desired position, stop the grill by using

the

buttons and press button

to stop the up/down grill.

4 When filter cleaning is finished, fix the filter to the up/down grill and move to

ascent by using

buttons, and

press button to go back up.

5 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

· Elevation grill function only operates in the indoor unit with the elevation grill. · Elevation grill function only operates at drive off.

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32 OPERATION INSTRUCTION
Function Setting – Child Lock
This function prevents children or other users from using the Thermostat carelessly.

1 Press

button until

the icon flashes.

2 Use the

buttons to move

to the Setup icon area and press

to set child lock.

3 When cancelling the child lock, use the buttons to select the Cancel icon and press to cancel the child lock.
4 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

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OPERATION INSTRUCTION 33
Function Setting – Minimum Difference Between Heating and Cooling Set Points
This function sets the difference between Heating and Cooling set points.

1 Press the

button until icon flashes.

2 Press

buttons to change.

minimum difference values

: 0~10°F(0~5°C)

3 Press button to complete the setting process.
4 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.
· When adjusting the minimum setting, both the heating and cooling set points will be adjusted to maintain the value as a minimum between heating and cooling set points.

• If power is lost for more than 50 hours, check displayed time and correct if needed.

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34 OPERATION INSTRUCTION
Function setting – Changing Current Time

1 Press the function setup button until it moves to time setup menu. The `Time setup’ icon appears and the time and day blink in the current time indication area. The example demonstrates changing the current time to ‘Monday at 10:20 a.m.

2 Press day.

keys to adjust the current

3 Press key to move to AM/ PM selection mode (the AM/ PM segment will flash).

4 Set the AM/ PM value by

pressing

buttons.

5 Press

buttons to move to ‘Hour’

setting mode. (the ‘Hour’ segment will

flash)

6 Set the Hour value by pressing buttons.

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OPERATION INSTRUCTION 35

7 Press

buttons to move to ‘Minute’

setting mode. (the ‘Minute’ segment will

flash)

8 Set the Minute value by pressing buttons.

9 Press

button to finish.

10 After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

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36 OPERATION INSTRUCTION
Function Setting – Override set time
This function is to set a schedule override operation time.
1 Use button to select Override time setting. If you press button, you will be able to select Override time with the icon, and icon will be blinking.

2 Using

buttons, you can set

Override time from 30 to 240 minutes

with an interval of 30 minutes.

· Default setting value: 60 minutes.

3 Press button to complete the setting process.
4 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

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OPERATION INSTRUCTION 37

Function Setting – Set back temperature
This function is to set the default temperature set points for set back operation. It is used when the controller doesn’t have a last known unoccupied schedule.

1 Use button to select Set back temperature setting. Press button

repeatedly to select Set back

temperature (

). The cooling set

point icon flashes as illustrated below.

2 Use button to set cooling set point. After that, press button to move to set heating set point. Using button, you can also set heating set point.

3 Press button to complete the setting process.
4 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change

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38 OPERATION INSTRUCTION
Function Setting – Filter Sign Clear
This function is to clear the indoor filter cleaning indicator.
1 Press button until the flashes.
2 When the is flashing, press the to clear this display.
h If the indoor unit product has a function to display the remaining time until the filter cleaning, it displays the remaining time until the filter cleaning in the current time display area.
· When the filter is covered by dust and debris, the indoor unit heating and cooling efficiency will be reduced and the unit will consume more energy. Cleaning the filter will prevent this loss of efficiency.
h The filter cleaning indication disappears automatically after a certain period of time, even without manually clearing the icon.

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OPERATION INSTRUCTION 39
Programming – Simple Reservation
A schedule can be set between 1 and 7 hours in 1 hour increments.

1 Press button on the Thermostat. (the `SIMPLE’ segment will blink)

2 Press

buttons to adjust

reservation time.

3 Press buttons to finish setting.

4 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change.

• When simple timer is set up, product automatically runs or stops after the time that is set.

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40 OPERATION INSTRUCTION
Programming – Sleep Reservation
Sleep reservation is the function of air conditioners to run and stop after a certain period of time at sleep mode before sleep. Sleep reservation will slowly reduce or turn off your unit while you sleep based on the time that you set.
· When operating under the Auto operation mode, the sleep reservation cannot be made and any sleep reservation gets deactivated.

1 Press button to enter the programming mode.

2 Press the button to enter the SLEEP reservation setting mode.

3 Press

buttons to adjust

reservation time.

The SLEEP reservation time is from 1 to

7 hours.

4 Press button to finish setting the reservation.
5 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change. If reservation is set up, the sleep indication will show on the lower part of the LCD screen.
6 If finishing sleep reservation setup, air-conditioner product operates sleep drive and stops after the time that is set.
! CAUTION
Because the unit automatically adjusts the desired temperature for comfortable air cooling in sleep drive, there could be a difference between the Thermostat’s desired temperature and the air conditioner body’s desired temperature.

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OPERATION INSTRUCTION 41
Programming – Weekly Reservation
You can set individual daily schedules for the week. – For correct operation of Weekly Reservation, please set current time correctly.
1 Press button to enter WEEK setting mode. “WEEK” will blink on the display.

2 Select desired day by pressing the buttons. The day icon will blink.

3 Enter timer number setting mode by pressing the button. The number icon will blink.

4 Select desired timer number to set by

pressing the

buttons.

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42 OPERATION INSTRUCTION

5 Enter AM/PM setting mode by pressing the button. AM or PM will blink on the display screen as pictured below.

6 Select the AM or PM by pressing

the

button.

7 Enter hour setting mode by pressing the button. The hour icon will blink on the display screen as pictured below.

8 Select desired hour by pressing the buttons.

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OPERATION INSTRUCTION 43
9 Enter minute setting mode by pressing the button. The minute icon will blink on the display screen as pictured below.
10 Select desired minute by pressing the buttons.

11 Enter ON/OFF setting mode by pressing the button. ON or OFF icon will blink on the display screen as pictured below.

12 Select ON/OFF condition timer by

pressing the

button.

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44 OPERATION INSTRUCTION
13 Enter OCCUPIED/UNOCCUPIED setting mode by pressing the button. OCCUPIED or UNOCCUPIED icon will flash as pictured below.
14 Select OCCUPIED/UNOCCUPIED condition of timer by pressing the buttons.
15 Enter operation mode setting mode by pressing the button. Operation mode icon will flash on the display screen as pictured below.
16 Select desired operation mode by pressing the button.

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OPERATION INSTRUCTION 45
17 Enter Cooling set point setting mode by pressing the button and the button. Cooling set point icon will flash on the display screen.
18 Select desired cooling set point by pressing the buttons.
19 Enter Heating set point setting mode by pressing the button. Heating set point icon will flash on the display screen.
20 Select desired heating set point by pressing the button.

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46 OPERATION INSTRUCTION
21 Enter fan speed setting mode by pressing the button. Fan speed icon will flash as pictured below.
22 Select desired fan speed by pressing the button.

23

If finishing weekly reservation setup, please press the button. Weekly reservation setup for the day that you set is finished.

24 If you setup with the method identical with above by selecting the day that you’d like to setup, it operates weekly reservation.

Weekly schedule

This side bar indicates which days have weekly reservations already set.

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OPERATION INSTRUCTION 47 · You cannot change operate mode, fan speed, setting temperature when in Unoccupied.
– Display `Unoccupied Lock’ in the window.

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48 OPERATION INSTRUCTION
Programming – Weekly Reservation Schedule Copy/Paste
You can copy weekly timer schedule data to another day.
1 Press button to enter Week setting mode.
2 Select desired day by pressing the buttons. The day icon will blink.
3 Press and hold button for 3 seconds to copy the schedule of the selected day. Copy icon will flash.
4 Select desired day by pressing the buttons. The day icon will blink.
5 Press and hold button for 3 seconds to paste the schedule from the selected day. Paste icon will flash.
6 Press button to exit or system will automatically exit after 25 seconds without any input.

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Programming – Holiday Reservation
You can set a holiday schedule.

OPERATION INSTRUCTION 49

1 Press button to enter Holiday setting mode.

2 Select desired day by pressing the buttons. The day icon will blink.

3 Press the button to set a day as a holiday. When the holiday is set, the day of the week will disappear from the side bar.

4 Press the setup.

button to finish the holiday

When the appointed holiday comes, the

air conditioner will automatically stop. If

the unit is turned on during the set

holiday, it will run for one hour and then

automatically turn off.

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50 OPERATION INSTRUCTION
Programming – Delete All Reservation
You can delete all reservation schedules. – Simple, sleep, weekly, and holiday reservations.
1 Press button and button simultaneously and hold for 3seconds to delete all reservation schedules.

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OPERATION INSTRUCTION 51
Different mode drive (This is not a US feature.)
Different mode drive is a phenomenon taking place when indoor units’ drive mode is different in the case that a few indoor units are set up at one AHU. Note: Different mode drive is not available for cooling-only models
1 While a few indoor units are running cooling on a heat pump system, it doesn’t operate heating drive if any indoor unit operates heating drive.
2 While a few indoor units are running heating on a heat pump system, it does not run if any indoor unit runs cooling or dehumidification. It is the indication that it is operating heating drive on a heat pump system.
3 By pressing button, indoor unit automatically runs at the mode that different indoor units are running after about 5 seconds and operates.

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52 OPERATION INSTRUCTION
Ventilation Product – lnterlocked Air conditioner and Ventilator
1 Control using Thermostat where air conditioner indoor unit and the ventilation product is installed at the same time. – When the power is turned on, your thermostat will recognize the ventilation product(it could take about 30 seconds) and then resume normal operation.

General Ventilation

Single Operation (General Ventilation Single Operation)
General Ventilation
Thermostat

Interlocked Operation (General Ventilation Interlocked Operation)

Air conditioner Indoor unit

General Ventilation

Thermostat

h Connecting wires is the same as air conditioner user manual. (Refer to page about Group control)

2 Press ‘Ventilation’ button on the Thermostat and enter Ventilation control mode to check the operation of ventilation product.

[Air conditioner control mode] [Ventilation control mode]

3 To convert back to air conditioner mode, press the ‘Ventilation’ button when in ventilation mode. – If no button is pressed for 15 seconds or more in ventilation mode, it automatically converts back to air conditioner mode.
– Ventilation product represent general ventilation product and direct expansion ventilation product.

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OPERATION INSTRUCTION 53
Ventilation Product – lnterlocked Operation with General Ventilator
It is used when air conditioner is interlocked with ventilation product. This function allows air conditioning and fresh air using the ventilation product at the same time.
Ventilation interlinked operation
1 Press button on the Thermostat control panel. – It is only used when air conditioner and general ventilation is lnterlocked.
2 Pressing button at ventilation mode will start ventilation.

3 Pressing button will change the ventilation operation mode. Pressing operation selection button will change the mode in the order of Recovery Bypass Auto It only displays on the Thermostat display when it is in ventilation mode, and it displays the desired temperature when it returns to air condition mode.

4 Pressing

button in general

ventilation mode will change

airflow speed.

Pressing fan speed speed button

will change the mode in the order of ‘ `Low

High Power’.

If CO2 sensor is installed, it can select from ‘

`Low High Power Automatic’.

5 Changing back to air conditioner mode 1)Automatic Conversion : when no button is pressed for 15 seconds or longer, it automatically converts back to air conditioner mode. 2) Manual Conversion : Pressing button in ventilation mode will manually convert.

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54 OPERATION INSTRUCTION
Ventilation Product – Ventilator single operation

1 Press button on the Thermostat.

2 Pressing button will change the ventilation mode.

Ventilation mode Heat
exchange
Normal
Automatic

Thermostat Display

Contents
Circulate indoor air without loss of heat
Directly circulate indoor air without going through heat exchanger
Circulate indoor air with automatically comparing indoor and outdoor air

3 Pressing

button will

change the strength of the wind

– Pressing the button can select

from ‘Low High Power’.

– If CO2 sensor is installed, it can

select from ‘Low High

Power Automatic’.

Ventilation Product Function Settings
h Refer to Function Setting – Child Lock ‘ part for lock function. h Refer to Function Setting – Filter Sign Clear ‘ part for Filter Cleaning function. h Refer to ` Function Setting – Changing Current Time ‘ part for Time Setting function.

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OPERATION INSTRUCTION 55
Ventilation Product Reservations Settings
Sleep Reservation : Sets to operate ventilation lightly during the sleep.

1 Press button to enter the Programming mode. Ex) Setting Sleep Reservation time as ‘3’.

2 Press button to enter the SLEEP reservation setting mode.

3 Press

buttons to adjust reservation

time. The Sleep reservation time can be set

from 1 to 12 hours.

4 Press button to finish setting. Whenever reservation is done.
5 Press button to exit. After setup, it automatically exits after 60 seconds if there is no input. If the Setting/Cancel button is not pressed, the mode will not change. The “Sleep” icon is displayed in the lower part of the display screen.
6 When the sleep reservation is set, the unit operates lightly.
Simple, Weekdays, and Holidays Reservations
Please refer to the chapters for Reservation Settings for inputting Simple, Week, and Holiday Reservations

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56 OPERATION INSTRUCTION
Troubleshooting Mode Self Diagnosis
The unit will automatically diagnose itself for any problems it experiences. It displays an error code for Troubleshooting and repair.
When an error occurs, the phrase “CH” and an error code number are displayed on the screen alternately as below. Example: When Error code 03 occurs.
When an error occurs while operating under the group control mode, the phrase “CH” and an error code are displayed on the screen to the right of the indoor temperature value alternately as below. Example: When Error code 03 occurs, C H 0 3
· When recovery takes place after occurrence of an error, controller operation mode may change because of communication with indoor unit. Make sure you set the correct operation mode after adjusting vane angle settings.
· Since the setting of the Thermostat (with cable) can be altered after its recovery from occurrence of a group control error, reset is recommended.

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OPERATION INSTRUCTION 57
Checkups Before Reporting Breakdown
Please first check the items below for troubleshooting before consulting a service center.

Symptoms

Check-up

Management

· Please check the circuit breaker.
· Is air-conditioner’s power on? · Please check the Thermostat wire setup condition.

Abnormal operating conditions.

· Are air-conditioner and Thermostat properly connected with cable?

· Please connect air-conditioner and Thermostat cable.

· Is cable connection correct?

· Please check against the setup method listed in the manual.

It doesn’t operate schedule.

· Is the time set correctly?
· Did you set up a schedule correctly?

· Please set up current time correctly.
· Please set up again referring to the manual.

It does not release cool air.

· Is desired temperature setup lower than current temperature?

· Please set up desired temperature lower than current temperature.

Air-conditioner automatically runs or stops.

· Is a reservation set on your unit?

· Please set up `Weekly timer’ again referring to the manual.

Error is indicated on Thermostat indication window.

· Does Thermostat indication window indicate ‘CH03’?

· Please check the remote control’s wire setup.
· Please check the connection between the air-conditioner and the Thermostat cable.

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58 INSTALLATION METHOD
INSTALLATION METHOD
1 Fix the backplate to the wall where you want to place it by fixing it to the wall with the provided screws. – Be sure not to bend the backplate while attaching it to the wall. A bent backplate may affect the proper setup for the thermostat. – Install product secure to the wall or electrical box to prevent gaps between the back plate and thermostat.

2 The Thermostat cable can be set in one of three positions. – Setup directions: back, top, or right – Remove the cable guide groove if installing for top or right side cable connection.

h Remove guide groove with long nose pliers. Back through the wall Top guide groove Right side guide groove
2
3
1

2 3