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OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
www.lg.com
P/NO : MFL68680901
TYPE :
(Air-to-Water Heat Pump)
Original instruction
ENGLISH
1

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Inhalt der Seiten


  • Page 1

    ENGLISH

    OWNER’S MANUAL

    AIR CONDITIONER
    Please read this manual carefully before operating
    your set and retain it for future reference.
    TYPE :
    (Air-to-Water Heat Pump)
    Original instruction

    www.lg.com
    P/NO : MFL68680901



  • Page 2

    Air-to-Water Heat Pump Owner’s Manual

    TABLE OF CONTENTS
    Safety Precautions .............................3
    Product Introduction ..........................6

    FOR YOUR RECORDS
    Write the model and serial numbers here:

    Model #

    Owner's Instruction ............................8

    Serial #

    Using Thermostat .............................25

    You can find them on a label on the side of each
    unit.

    Maintenance and Service.................28

    Installer's Name
    Purchased Date
    n Staple your receipt to this page in the event you
    need it to prove date of purchase or for warranty
    issues.

    READ THIS MANUAL
    Inside you will find many helpful hints on how to use and
    maintain your AWHP properly. Just a little preventive
    care on your part can save you a great deal of time and
    money over the life of your product.
    You'll find many answers to common problems in the
    chart of troubleshooting tips. If you review our chart of
    Troubleshooting Tips first, you may not need to call for
    service at all.

    PRECAUTION
    • Contact the authorized service technician for repair or
    maintenance of this unit.
    • Contact the installer for installation of this unit.
    • AWHP is not intended for use by young children or
    invalids without supervision.
    • Young children should be supervised to ensure that
    they do not play with AWHP.
    • When the power cable is to be replaced, replacement
    work shall be performed by authorized personnel only
    using only genuine replacement parts.
    • Installation work must be performed in accordance
    with the National Electric Code by qualified and
    authorized personnel only.

    2 Air-to-Water Heat Pump



  • Page 3

    Safety Precaution

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

    WARNING
    Always ground the product.

    • There is a risk of electric shock.
    For electrical work, contact the dealer, seller,
    a qualified electrician, or an Authorized
    Service Center. Do not disassemble or repair
    the product by yourself.
    • There is risk of fire or electric shock.

    Use the correctly rated breaker or fuse.

    • There is risk of fire or electric shock.

    Do not install the product on a defective
    installation stand. Be sure that the
    installation area does not deteriorate with
    age.
    • It may cause product to fall.

    Be sure to check the refrigerant to
    be used. Please read the label on the
    product.
    • Incorrect refrigerant can prevent the normal
    operation of the unit.

    Do not use a defective or underrated
    circuit breaker. Use the correctly rated
    breaker and fuse.
    • There is risk of fire or electric shock .
    Always ground the product as per the
    wiring diagram. Do not connect the
    ground wire to gas or water pipes
    lightening rod or telephone ground wire.
    • There is risk of fire or electric shock.

    Do not modify or extend the power
    cable. If the power cable or cord has
    scratches or skin peeled off or
    deteriorated then it must be replaced.
    • There is risk of fire or electric shock.

    Never install the unit on a moving base
    or a place from where it can fall down.

    • The falling unit can cause damage or injury
    or even death of a person.
    Don't use a power cord, a plug or a
    loose socket which is damaged.
    • Otherwise it may cause a fire or electrical
    shock.

    Do not use a multi outlet. Always use
    this appliance on a dedicated circuit and
    breaker.
    • There is risk of fire or electric shock.
    Install the panel and the cover of control
    box securely.

    • There is risk of fire or electric shock due to
    dust , water etc.
    For installation, removal or reinstall ,
    always contact the dealer or an
    Authorized Service Center.
    • There is risk of fire, electric shock, explosion,
    or injury.
    When the product is soaked (flooded or
    submerged) in water , contact an
    Authorized Service Center for repair
    before using it again.
    • There is risk of fire or electric shock.

    Do not touch , operate, or repair
    the product with wet hands.
    • There is risk of electric shock or fire.

    Owner’s Manual 3

    ENGLISH

    Safety Precautions



  • Page 4

    Safety Precaution
    Do not place a heater or other heating
    appliances near the power cable.
    • There is risk of fire and electric shock.

    Do not allow water to run into electric
    parts. Install the unit away from water
    sources.
    • There is risk of fire, failure of the product, or
    electric shock.

    Do not store or use or even allow
    flammable gas or combustibles near the
    product.
    • There is risk of fire.

    Wiring connections must be secured
    tightly and the cable should be routed
    properly so that there is no force pulling
    the cable from the connection terminals.

    Safely dispose off the packing materials. Like
    screws, nails, batteries, broken things etc after
    installation or service and then tear away and
    throw away the plastic packaging bags.

    Make sure to check that the power
    device is not dirty, loose or broken and
    then turn on the power.

    • Improper or loose connections can cause
    heat generation or fire.

    • Children may play with them and cause
    injury.

    • Dirty, loose or broken power device can
    cause electric shock or fire.

    In unit the step-up capacitor supplies
    high voltage electricity to the electrical
    components. Be sure to discharge the
    capacitor completely before conducting
    the repair work.

    When installing the unit, use the
    installation kit provided with the product.

    Be sure to use only those parts which
    are listed in the service parts list. Never
    attempt to modify the equipment.

    • An charged capacitor can cause electrical
    shock.

    • Otherwise the unit may fall and cause severe
    injury.

    • The use of inappropriate parts can cause an
    electrical shock, excessive heat generation or fire.

    Do not use the product in a tightly
    closed space for a long time. Perform
    ventilation regularly.

    Do not open the front cover or grille of the
    product during operation. (Do not touch the
    electrostatic filter, if the unit is so equipped.)

    If strange sounds, smell or smoke comes
    from product, immediately turn the breaker
    off or disconnect the power supply cable.

    • Oxygen deficiency could occur and hence
    harm your health.
    Ventilate the product room from time to
    time when operating it together with a
    stove, or heating element etc.
    • Oxygen deficiency can occur and hence
    harm your health.
    Take care to ensure that power cable
    could not be pulled out or damaged
    during operation.
    • Almost the antifreeze is a toxic product.

    If you touch the pipe or internal parts,
    you should be wear protection or wait
    time to return to normal temperature.

    • Otherwise , it may cause burns or frostbite,
    personal injury.

    • There is risk of physical injury, electric
    shock, or product failure.
    Turn the main power off when cleaning
    or repairing the product.
    • There is risk of electric shock.

    Do not touch any electric part with wet
    hands. you should be cut power before
    touching electric part.
    • There is risk of electric shock or fire.

    Do not touch leaked refrigerant directly.

    • There is risk of frostbite.

    Do not heated to a temperature of more than provided by the product.
    • Otherwise, it may cause fire or damage of product.

    4 Air-to-Water Heat Pump

    • There is risk of electric shock or fire.

    Take care to ensure that nobody
    especially kids could step on or fall onto
    the unit.
    • This could result in personal injury and
    product damage.
    Do not touch refrigerant pipe and water
    pipe or any internal parts while the unit
    is operating or immediately after
    operation.
    • There is risk of burns or frostbite, personal
    injury.
    Make sure to install mixing valve (field
    supply). The mixing valve is setting the
    water temperature. The hot water
    temperature maximum values shall be
    selected according to the applicable
    legislation.



  • Page 5

    Safety Precaution

    Two or more people must lift and
    transport the product.
    • Avoid personal injury.

    Do not install the product where the noise
    or hot air from the unit could damage or
    disturb the neighborhoods.
    • It may cause a problem for your neighbors
    and hence dispute.

    Do not block the inlet or outlet of air
    flow.
    • It may cause product failure.

    Do not insert hands or other objects
    through the air inlet or outlet while the
    product is operating.
    • There are sharp and moving parts that could
    cause personal injury.

    Do not tilt the unit when removing or
    uninstalling it.
    • The condensed water inside can spill .

    Dismantling the unit, treatment of the
    refrigerant oil and eventual parts should
    be done in accordance with local and
    national standards.

    Do not install the product where it will be
    exposed to sea wind (salt spray) directly.
    • It may cause corrosion on the product.

    Always check for gas (refrigerant)
    leakage after installation or repair of
    product.
    • Low refrigerant levels may cause failure of
    product.

    Use a soft cloth to clean. Do not use
    harsh detergents, solvents or splashing
    water etc .
    • There is risk of fire, electric shock, or
    damage to the plastic parts of the product.

    Be cautious when unpacking and
    installing the product.
    • Sharp edges could cause injury.

    Do not mix air or gas other than the
    specified refrigerant used in the system .
    • If air enters the refrigerant system, an
    excessively high pressure results, causing
    equipment damage or injury.

    Do not expose your skin or kids or
    plants to the cool or hot air draft.

    • This could harm to your health.

    The hot water may not be available immediately,
    during disinfection operation or depending on the
    amount of hot water.

    Keep level even when installing the
    product.
    • To avoid vibration or noise.

    Do not use the product for special
    purposes, such as preserving foods,
    works of art, etc. It is a consumer AWHP,
    not a precision refrigeration system.
    • There is risk of damage or loss of property.

    Do not step on or put anyting on the
    product.
    • There is risk of personal injury and failure of product.

    If the refrigerant gas leaks during the
    repair, do not touch the leakaing
    refrigerant gas.
    • The refrigernat gas can cause frostbite (cold
    burn).

    If the refrigerant gas leaks during the
    installation, ventilate the area immediately.
    • Otherwise it can be harmfull for your health.

    Use a firm stool or ladder when cleaning,
    maintaining or repairing the product at
    an height.
    • Be careful and avoid personal injury.

    During floor heating operation it is important to limit
    the minimum/maximum water temperature.

    Owner’s Manual 5

    ENGLISH

    CAUTION



  • Page 6

    Product Introduction

    Product Introduction
    Typical Installation Scene

    3

    1

    2

    Water
    Inlet

    Water
    Outlet

    4

    5

    1. Indoor unit
    2. Outdoor unit
    3. Refrigerant pipe and connecting cable
    4. Water pipe
    5. Ground wire to ground outdoor unit to prevent electrical shocks.

    *The shape of products can be chaged according to the model capacity and type.

    6 Air-to-Water Heat Pump



  • Page 7

    Product Introduction
    ENGLISH

    Remote Controller

    ‫ڸ‬

    ‫ۀ‬
    ‫ڿ‬
    ‫ھ‬
    ‫ڽ‬
    ‫ہ‬
    ‫ۂ‬

    ‫ڹ‬
    ‫ں‬

    ZDWHU
    KHDWLQJ

    ‫ڻ‬

    WHPS
    RSHU
    PRGH

    ‫ڼ‬

    ‫ۃ‬
    ‫ۄ‬
    No
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13

    Name
    Display
    Change Temperature Button
    Water Heating Enable / Disable Button
    Power Button
    Operation Mode Selection Button
    Silent Mode On / Off Button
    Temperature Setting Mode Button
    Temperature View Mode Button
    Function Setting Button
    Programming Button
    Direction Button (Up, Down, Left, Right)
    Set / Clear button
    ESC Button

    Owner’s Manual 7



  • Page 8

    Owner's Instruction

    Owner's Instruction
    Monitoring Information
    Electric heater STEP one
    Electric heater STEP two
    These icons indicate that the backup electric heater is operating.

    Sanitary water tank heater
    This icon indicates that sanitary water tank electric heater which is located inside sanitary
    water tank is active.
    The icon is not used when sanitary water tank is not installed.

    Water pump
    This icon indicates that the water pump inside the unit is active.

    Auxiliary solar thermal pump
    This icon indicates that auxiliary solar thermal pump is active.
    NOTE : As installation of auxiliary solar thermal pump is not compulsory but
    recommendation according to field condition, this icon can be seen although no auxiliary
    solar thermal pump is installed.

    Defrosting
    This icon indicates that the defrost mode is active.
    This mode is automatically operating.

    Maintain lowest temperature
    The purpose of this mode is maintaining the temperature to prevent damage by freezing of
    water pipe.

    Disinfection
    This icon indicates disinfecting operation is ongoing in sanitary water tank.

    Compressor
    This icon indicates that the compressor is active.

    Child Lock
    No function
    Central Controller
    This icon indicates that the product is controlled by the central controller.

    Thermostat
    This icon indicates connection with thermostat.

    Slight trouble
    This icon indicates that slight trouble is occurred.

    Heavy trouble
    This icon indicates that heavy trouble is occurred.

    8 Air-to-Water Heat Pump



  • Page 9

    Owner's Instruction
    ENGLISH

    Mode Change
    Turn on the product and select operation mode.

    1

    Press power button to turn on the product.

    2

    Press OPER MODE button to select each operation mode.

    Cooling operation

    Heating operation

    Weather dependent
    operation

    Operation mode
    • Cooling operation - The product yields cool water to use in FCU cooling.
    • Heating operation - The product yields hot water to use in under floor heating or FCU heating.
    • Weather dependent heating operation - In this mode, heating setpoint is automatically determined
    by pre-defined temperature profile.

    Selecting Target Temperature

    1

    Press SET TEMP button to select each operation mode.

    Room temperature

    2

    Leaving water
    temperature

    Sanitary water tank
    temperature

    Adjust desired temperature by pressing change TEMP buttons on each mode.
    To raise the temperature

    To lower the temperature

    h Note
    : Increase 1 ℃ or 2 ℉ per one time pressing
    : Decrease 1 ℃ or 2 ℉ per one time pressing
    • We can change the temperature range of each mode on installation setting mode.
    Please refer function code 11 to 15.
    • Room temperature setting is available when remote room air sensor (sold separately) is
    installed. Please refer function code 03.
    • Sanitary water tank temperature setting is available when sanitary water tank is installed.

    Owner’s Manual 9



  • Page 10

    Owner's Instruction

    Weather-Dependent Operation
    This mode is only applied to heating.
    In order to save energy and to give highest comfort, setting temperature will follow outside
    temperature. If outdoor temperature decreases, heating capacity for the house will increase
    automatically in order to keep same room temperature. All parameters will be set by installer during
    start-up procedure and will be adapted to the site characteristic.

    1

    Press OPER MODE button to select weather-dependent operation mode.

    2

    Adjust the desired temperature level by pressing change TEMP buttons.

    : Weather dependent
    operation icon

    Ex) Decreasing temperature profile by 3°C
    (based on room air temperature)
    <Temperature adjust step (unit : °C)>
    -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
    Cold

    Hot

    View Temperature

    1

    Press repeatedly VIEW TEMP
    button
    To select each temperature.
    (Whenever press VIEW TEMP
    button, the room temperature
    will be displayed during 5
    seconds.)

    : View room temperature
    : View inlet temperature
    : View outlet temperature
    : View sanitary water temperature
    (Only displayed when sanitary
    water heating mode)
    : View solar power temperature
    (Only displayed when sanitary
    water heating mode)

    (Unit:°C)
    Temperature
    Air

    Water

    10 Air-to-Water Heat Pump

    Temperature Range

    Display

    below 11

    Lo

    11 ~ 39

    actual temperature

    above 39

    Hi

    below 0

    Lo

    0 ~ 92

    actual temperature

    above 92

    Hi



  • Page 11

    Owner's Instruction

    1

    Press repeatedly view

    button

    <Sanitary water heating disable>

    2

    ENGLISH

    Sanitary Water Heating Operation

    <Sanitary water heating enable>

    Sanitary water heating operation is operating only on enable condition.
    During operation, segment will be on.

    <Sanitary water heating ON>

    <Note>
    • This function is not used when the sanitary water tank is not installed.
    • If you want to know more information, refer function code [15, 26~29] on installation
    information section.

    Owner’s Manual 11



  • Page 12

    Owner's Instruction

    Silent Mode Operation
    Silent mode operation is that the unit works at reduced capacity so that the noise produced by the
    unit drops.

    1

    Press the programming button repeatedly until silent mode icon is shown.

    2

    Press left, right button to select menu.
    “AM/PM or hour”

    3

    Press down button to move to AM/PM
    part and adjust it. (The AM/PM segment
    will be flashed).

    4

    Press right button to move to "Hour"
    part. (the "Hour" segment will be
    flashed).

    5

    Press up, down button to adjust the
    Hour.

    6

    If you finish the setting,
    press OK / CLEAR button.

    7

    Press exit button to exit or system will automatically release without any
    input 25 seconds.

    This implies that the heating and cooling capacity will also drop. Beware of this when a
    certain level of heating or cooling is required.
    Silent mode operation may not work while  the product is proceeding higher priority
    operation such as defrost operation, anti-freezing operation, and etc.
    (When this mode is not operated by the priority order, ONLY display
    .)

    12 Air-to-Water Heat Pump



  • Page 13

    Owner's Instruction
    ENGLISH

    Child Lock
    This function is to prevent children or other people from using controller.

    1

    Press function setting button to enter
    user setting mode. (The segment will be flashed)

    2

    Press OK / CLEAR button to finish the selection.
    The segment will be disappear.

    3

    During Child Lock,
    icon and 'CL' will be
    displayed during 3 seconds whenever entering
    any kind of buttons except for view temperature
    button and setting/clear button.

    4

    To release this setting, pressing function setting
    button until
    icon flash and then enter OK /
    CLEAR button.

    Owner’s Manual 13



  • Page 14

    Owner's Instruction

    Quick Sanitary Tank Heating
    If there is urgent sanitary heating demand, Quick Sanitary Tank Heating mode can be used to reduce
    the time to reach target sanitary tank temperature by forcibly turning on sanitary tank heater.
    After reaching target sanitary tank temperature or by user’s input to stop, Quick Sanitary Tank
    Heating mode will be finished.

    1

    Press Sanitary Tanke Heating Enable button with up button for 3 seconds to start Quick
    Sanitary Tank Heating. ‘Sanitary Tank Heating Enable’ icon and ‘Sanitary tank heater’
    icon will be flashing together.

    2

    If target sanitary tank temperature is reached or user pushes Sanitary Tanke Heating
    Enable button with down button for 3 seconds, Quick Sanitary Tank Heating will be
    finished and icon flashing will be stopped.

    14 Air-to-Water Heat Pump



  • Page 15

    Owner's Instruction
    ENGLISH

    Error Code display
    The error code will be displayed on control panel.

    Slight trouble : Sensor trouble

    <Display>

    Heavy trouble : Compressor cycle trouble

    <Display>

    Critical error
    On critical error, the unit will stop unconditionally.
    At this time, 'CH' and error code No. keep display by turns.

    <Display>

    Owner’s Manual 15



  • Page 16

    Owner's Instruction

    Setting Current Time
    You can set current time.

    1

    Keep pressing programming button for 3 seconds to enter Setting
    current time mode.

    2

    Press left, right button to adjust the
    current day.

    3

    Press down button to move to AM/PM
    part and adjust it. (The AM/PM segment
    will be flashed).

    4

    Press right button to move to "Hour"
    part. (the "Hour" segment will be
    flashed).

    5

    Press up, down button to adjust the
    Hour.

    6

    Press right button to move to "Minute"
    part. (the "Minute" segment will be
    flashed).

    7

    Press up, down button to adjust the
    Minute.

    8

    If you finish the setting,
    press OK / CLEAR button.

    9

    Press exit button to exit or system will automatically release without any
    input 25 seconds.

    16 Air-to-Water Heat Pump



  • Page 17

    Owner's Instruction

    You can easily turn-on reservation.(ONLY enable when unit is stand-by.)

    1

    Press programming button to enter the
    Programming mode. (the segment flashing)

    2

    Press up, down button to adjust the
    reservation time.

    3

    If you finish the setting, press OK / CLEAR button to complete
    programming.

    4

    Press exit button to exit or system will automatically release without any
    input after 25 seconds.

    Programming : Setting Sleep Reservation
    You can easily turn-off(sleep) reservation.(ONLY enable when unit is operating.)

    1

    Press programming button to enter the
    Programming mode. Repeat pressing
    button to select [sleep reservation].
    (the segment flashing)

    2

    Press up, down button to adjust the
    reservation time.

    3

    If you finish the setting, press OK / CLEAR button to complete
    programming.

    4

    Press exit button to exit or system will automatically release without any
    input after 25 seconds.

    Owner’s Manual 17

    ENGLISH

    Programming : Setting Simple Reservation



  • Page 18

    Owner's Instruction

    Screed drying
    After installing water pipes for under floor heating, user can select screed drying mode for curing the cement

    1

    Keep pressing programming button for 3 seconds to enter setting
    screed drying mode.

    2

    Press programming button to select
    function code 18.

    3

    Press left, right button to move to
    screed drying setting part.

    4

    Press up, down button to adjust “01” or
    “00”
    (00: Not Used 01: Used)

    5

    If you finish the setting,
    press OK / CLEAR button.

    6

    Press exit button to exit or system will automatically release without any
    input 25 seconds.

    7

    During the screed drying mode, “dry” is
    displayed.
    Left days for completing the screed drying
    mode are displayed.
    Left days

    18 Air-to-Water Heat Pump



  • Page 19

    Owner's Instruction
    ENGLISH

    Programming : Setting ON Reservation
    This function is able to turn-on after a setting time.

    1

    Press programming button to enter the
    Programming mode. Repeat pressing button
    to select [on reservation]. (the segment
    flashing)

    2

    Press up, down button to adjust AM/PM.

    3

    Press right button to move to "Hour"
    part. (the "Hour" segment will be
    flashed).

    4

    Press up, down button to adjust the
    Hour.

    5

    Press right button to move "Minute" part.
    (the "Minute" segment will be flashed).

    6

    Press up, down button to adjust the
    Minute.

    7

    If you finish the setting, press OK / CLEAR button to complete
    programming.

    8

    Press exit button to exit or system will automatically release
    without any input after 25 seconds.

    Owner’s Manual 19



  • Page 20

    Owner's Instruction

    Programming : Setting OFF Reservation
    This function is able to turn-off after a setting time.

    1

    Press programming button to enter the
    Programming mode. Repeat pressing button
    to select [off reservation]. (the segment
    flashing)

    2

    Press up, down button to adjust AM/PM.

    3

    Press right button to move to "Hour"
    part. (the "Hour" segment will be
    flashed).

    4

    Press up, down button to adjust the
    Hour.

    5

    Press right button to move "Minute" part.
    (the "Minute" segment will be flashed).

    6

    Press up, down button to adjust the
    Minute.

    7

    If you finish the setting, press OK / CLEAR button to complete
    programming.

    8

    Press exit button to exit or system will automatically release
    without any input after 25 seconds.

    20 Air-to-Water Heat Pump



  • Page 21

    Owner's Instruction
    ENGLISH

    Programming : Weekly Reservation
    The weekly reservation is active after setting current time.

    1

    Press programming button to enter the
    Programming mode. Repeat pressing
    button to select [Weekly reservation].
    (the segment flashing)

    2

    Press left, right button to adjust the
    current day.

    3

    Press up, down button to adjust the
    action number.

    4

    Press right button to move to "Hour"
    part on ON time section. (The "Hour"
    segment will be flashed).

    Start Time Section

    5

    Press up, down button to adjust the
    Hour on Start Time section.

    6

    Press right button to move to "Minute"
    part on start time section. (The "Minute"
    segment will be flashed).

    7

    Press up, down button to adjust the
    minute on start time section.

    8

    Press right button to move to "Hour" part
    on OFF time section. (The "Hour"
    segment will be flashed).

    Off Time Section

    Owner’s Manual 21



  • Page 22

    Owner's Instruction

    9

    Please refer the process from No.5 to
    No.7 for setting OFF time. It is same
    method.

    10

    If you finish the setting, press
    setting/cancel button to complete
    programming. The under bar
    segment will be created, when it
    finished.

    11

    Please refer the process from No.2
    to No.10 for setting other day weekly
    program. It is same method.

    12

    Press exit button to exit or system will automatically
    release without any input after 25 seconds.

    <Note>
    Description of weekly reservation
    <Start time selction>

    Action
    Start Time
    From
    <Start time selction>

    <Off time selction>

    To
    Off Time
    <Off time selction>

    ❋ Two actions per weekday can be programmed, in total 14 actions.

    22 Air-to-Water Heat Pump



  • Page 23

    Owner's Instruction
    ENGLISH

    Programming : Holiday Reservation
    This function is to automatically stop the machine working on some days.

    1

    Press programming button to enter the
    Programming mode. Repeat pressing
    button to select [Holiday reservation].
    (the segment flashing)

    2

    Press left, right button to adjust the
    holiday.

    3

    When you press set/clear button after
    finishing the selection, the day selected
    will be disappear.

    4

    Press exit button to exit or system will automatically release without any input
    after 25 seconds.

    Owner’s Manual 23



  • Page 24

    Owner's Instruction

    Programming : Sanitary Tank Heating & Sanitary Tank Heater Operation
    This function is schedule programming about sanitary tank heating and sanitary tank heater
    operation. Two schedule programming for sanitary tank heating and another Two schedule
    programming for sanitary tank heater operation are possible. Pre-assigned program numbers for
    sanitary tank heating programming are ‘1’ and ‘2’. Programming number ‘3’ and ‘4’ are assigned for
    sanitary tank heater operation. Scheduled programming will be operated everyday.

    1

    Press programming button to enter the programming mode. Repeat pressing button to
    select sanitary tankt heating programming. (the segment flashing)

    2

    Press left and right button to adjust schedule program number. Programming number ‘1’
    and ‘2’ are for sanitary tank heating programming(if selected, ‘Sanitary tank heating
    enabled’ icon will be flashing), and ‘3’ and ‘4’ are for sanitary tank heater operation
    programming(if selected, ‘Sanitary tank heater’ icon will be flashing).

    3

    After selecting programming number, press down button to enter adjusting turn-on time.
    Turn-on time can be adjusted by pressing left, right, up, and down button. After assigning
    minute of turn-on time, press right button to enter adjusting turn-off time. Like adjusting
    turn-on time, press left, right, up, and down button to change turn-off time.

    4

    Press set button to finish programming.
    To exit Programming mode, press ESC button.

    24 Air-to-Water Heat Pump



  • Page 25

    Using Thermostat

    The term "thermostat", which is widely used in this chapter, is a kind of 3rd party accessory.
    LG Electronics does not supply thermostat and it should be supplied 3rd party manufacturers.
    Room thermostat can be used for easy and convenience control. To utilize thermostat more
    efficiently and correctly, this chapter presents information about using thermostat.

    CAUTION
    1. Some electro-mechanical type thermostat has internal delay time to protect compressor. In
    that case, mode change can takes time more than user's expectation. Please read
    thermostat manual carefully if the product does not response quickly.
    2. Setting temperature range by thermostat can be different with that of the product. The
    heating or cooling set temperature should be chosen within the setting temperature range of
    the product.

    How to use Thermostat
    To find how to turn on and off, how to set target temperature, how to change operating mode, etc,
    please refer thermostat operating manual provided by thermostat manufacturer.

    Operating Thermostat with Control Panel
    • Following features are permitted when thermostat is installed. :


    SET TEMP button



    VIEW TEMP button



    Temperature adjust button*



    Sanitary water heating Enable / Disable



    Silent operation On / Off

    * : Adjusted temperature is only used to control electric heater on / off condition.
    The product does not turn on / off according to the setting temperature at the control panel.
    It turns on / off according to the thermostat signal.
    • Following features are NOT permitted when thermostat is installed. :


    Operating mode (cooling) selection



    Time scheduling



    Operation On / Off

    Owner’s Manual 25

    ENGLISH

    Using Thermostat



  • Page 26

    Using Thermostat

    Emergency Operation
    • Definition of terms
    - Trouble : a problem which can stop system operation, and can be resumed temporally under
    limited operation without certificated professional's assist.
    - Error : problem which can stop system operation, and can be resumed ONLY after certificated
    professional's check.
    - Emergency mode : temporary heating operation while system met trouble.
    • Objective of introducing 'Trouble'
    - Not like airconditioning product, Air-to-Water heat pump is generally operation in whole winter
    season without any system stopping.
    - If system found some problem, which is not critical to system operating for yielding heating
    energy, the system can temporarily continue in emergency mode operation with end user's
    decision.
    • Classified trouble
    - Trouble is classified two levels according to the seriousness of the problem. : Slight trouble and
    Heavy trouble
    - Slight trouble : Sensor trouble. In most case, this trouble is concerned with sensor problems.
    The unit is operating under emergency mode operation(level 1).
    - Heavy trouble : Compressor cycle trouble. Emergency mode operation(level 2) is performed by
    optional electric heater.
    - Option trouble : a problem is found for option operation such as water tank heating. In this
    trouble, the troubled option is assumed as if it is not installed at the system.
    • Emergency operation level
    - When system met trouble, it stops operation and wait for user’s decision : Calling service center
    or starting emergency operation.
    - To start emergency operation, user simply push ON / OFF button once more.
    - Two different levels are prepared for emergency operation : High temperature cycle and low
    temperature cycle.
    - In emergency operation mode, user can not adjust target temperature.
    ※ It can not be operated, if the electric heater accessory is not installed.
    Dip
    Switch
    (#4)

    Target
    Leaving Water
    Temperature

    Target
    Room Air
    Temperature

    Target
    Sanitary Water
    Temperature

    High temperature cycle

    OFF

    50°C

    24°C

    70°C

    Low temperature cycle

    ON

    30°C

    19°C

    50°C

    26 Air-to-Water Heat Pump



  • Page 27

    Using Thermostat

    -

    Operation On/Off

    -

    VIEW TEMP button*

    -

    Temperature adjust button*

    -

    Sanitary water heating Enable / Disable

    ENGLISH

    • Following features are permitted in emergency operation. :

    * : Temperature measured by failed sensor is displayed as ‘- -’.
    * : Adjusted temperature is only used to control electric heater on / off condition.
    The product does not turn on / off according to the setting temperature at the control panel. It turns
    on / off according to the thermostat signal.

    • Following features are NOT permitted in emergency operation. :
    -

    Operating mode (cooling/ heating/ weather-dependent) selection

    -

    Time scheduling

    -

    SET TEMP button

    • Duplicated trouble : Option trouble with slight or heavy trouble
    - If option trouble is occurred with slight (or heavy) trouble at the same time, the system puts higher
    priority to slight (or heavy) trouble and operates as if slight (or heavy) trouble is occurred.
    - Therefore, sometimes sanitary water heating can be impossible in emergency operation mode.
    When sanitary water is not warming up while emergency operation, please check if sanitary water
    sensor and related wiring are all Ok.

    • Emergency operation is not automatically restarted after main electricity power is reset.
    - In normal condition, the product operating information is restored and automatically restarted
    after main electricity power is reset.
    - But in emergency operation, automatic re-start is prohibited to protect the product.
    - Therefore, user must restart the product after power reset when emergency operation has been
    running.

    Owner’s Manual 27



  • Page 28

    Maintenance and Service

    Maintenance and Service
    Maintenance Activities
    In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and
    the field wiring have to be carried out at regular intervals, preferably yearly. This maintenance should
    be carried out by your local agreed technician.

    When the unit is not going....
    CAUTION
    • If the product is not used for long time, we strongly
    recommend NOT TO SWITCH OFF THE POWER
    SUPPLY
    to the product.
    • If power is not supplied, some special product-protecting
    actions
    (such as water pump anti-locking) will not performed.

    Call the service immediately in the following situations
    1. Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and turn the
    breaker off. Never try to repair by yourself or restart the system in such cases.
    2. Main power cord is too hot or damaged.
    3. Error code is generated by self diagnosis.
    4. Water leaks from unit.
    5. Any switch, breaker (safety, earth) or fuse fails to work properly.
    User must carry routine checkup & cleaning to avoid unit’s poor performance.
    In case of special situation, the job must be carried out by the only service person.

    CAUTION
    • In the case of water with added brine, the drain valve of shut-off valve must be connected to a
    recovery container.
    • Do not touch the water stirred with the brine.
    • When the brine in the pipe is leaked, do not operate the unit and contact dealer, seller or an
    authorized service center.

    28 Air-to-Water Heat Pump



  • Page 29

    Maintenance and Service

    Check the following points before requesting repairs or service.... If the malfunction persist, please contact your dealer.
    Case
    AWHP does not operate.

    The room has a peculiar odor.
    AWHP does not operate for
    about 3 minutes when restart.
    Does not cool or heat effectively.

    The unit operation is noisy.

    Steam is raised in unit.

    Control panel display is faint, or
    no display at all.

    Explanation
    • Have you made a mistake in timer operation?
    • Has the fuse blown or has the circuit breaker been tripped?
    • If ‘CH 14’is displayed in the display panel, check whether the water pipe is
    frost or remove the air in the PHEX by opening the air vent.
    • Check that this is not a damp smell exuded by the walls, carpet, furniture
    or cloth items in the room.
    • This is the protector of the mechanism.
    • Wait about three minutes and operation will begin.
    • The room may have been very hot when the AWHP was first turned on.
    Allow time for it to cool down.
    • Has the setting temperature been set incorrectly?
    • Refrigerant flow sound
    - While the system is being started or stopping, sound from the refrigerant
    flow may be heard.
    • Water noise
    - During starting or stopping of the unit, noise can appear in water piping.
    • During defrost
    - Noise can appear in unit due to defrosting of water.
    • Sound for the unit heat exchanger
    - Durig the cooling operation, a sound may be heard from the indoor unit
    heat exchanger due to water freezing or melting.
    • Steam from heat exchanger
    - During defrosting operation, ice on the heat exchanger is melted,
    resulting in making steam.
    • Has the circuit breaker been tripped?

    Owner’s Manual 29

    ENGLISH

    Troubleshooting Tips! Save Time and Money!



  • Page 30

    [Representative] LG Electronics Inc. EU Representative
    Krijgsman 1, 1186 DM Amstelveen, The Netherlands
    [Manufacturer] LG Electronics Inc. Changwon 2nd factory
    84, Wanam-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA






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