LG HU031 User Manual
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 : MFL68680902
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Air-to-Water Heat Pump Owner’s Manual
TABLE OF CONTENTS
Safety Precautions ............................. |
3 |
Product Introduction .......................... |
6 |
Owner's Instruction............................ |
8 |
Using Thermostat ............................. |
25 |
Maintenance and Service................. |
28 |
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Installer's Name
Purchased Date
νStaple 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
Safety Precaution
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
νIncorrect 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. |
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CAUTION |
This symbol indicates the possibility of injury or damage. |
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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.
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.
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.
Be sure to check the refrigerant to |
Don't use a power cord, a plug or a |
Do not touch , operate, or repair |
be used. Please read the label on the |
loose socket which is damaged. |
the product with wet hands. |
product. |
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|
• Incorrect refrigerant can prevent the normal |
• Otherwise it may cause a fire or electrical |
• There is risk of electric shock or fire. |
operation of the unit. |
shock. |
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Owner’s Manual 3
Safety Precaution
Do not place a heater or other heating appliances near the power cable.
•There is risk of fire and electric shock.
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.
•Improper or loose connections can cause heat generation 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.
•An charged capacitor can cause electrical shock.
Do not use the product in a tightly closed space for a long time. Perform ventilation regularly.
•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.
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.
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.
•Children may play with them and cause injury.
When installing the unit, use the installation kit provided with the product.
Do not store or use or even allow flammable gas or combustibles near the product.
•There is risk of fire.
Make sure to check that the power device is not dirty, loose or broken and then turn on the power.
•Dirty, loose or broken power device can cause electric shock or fire.
Be sure to use only those parts which are listed in the service parts list. Never attempt to modify the equipment.
• Otherwise the unit may fall and cause severe |
• The use of inappropriate parts can cause an |
injury. |
electrical shock, excessive heat generation or fire. |
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.)
•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.
If strange sounds, smell or smoke comes from product, immediately turn the breaker off or disconnect the power supply cable.
•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.
If you touch the pipe or internal parts, |
Do not touch leaked refrigerant directly. |
you should be wear protection or wait |
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time to return to normal temperature. |
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• Otherwise , it may cause burns or frostbite, |
• There is risk of frostbite. |
personal injury. |
|
Do not heated to a temperature of more than provided by the product.
• Otherwise, it may cause fire or damage of product.
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.
4 Air-to-Water Heat Pump
Safety Precaution
CAUTION
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.
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.
• It may cause a problem for your neighbors |
• Low refrigerant levels may cause failure of |
and hence dispute. |
product. |
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 .
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.
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.
Dismantling the unit, treatment of the |
Do not expose your skin or kids or |
Use a firm stool or ladder when cleaning, |
|
refrigerant oil and eventual parts should |
plants to the cool or hot |
air draft. |
maintaining or repairing the product at |
be done in accordance with local and |
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an height. |
national standards. |
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• This could harm to your health. |
• Be careful and avoid personal injury. |
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The hot water may not be available immediately, |
During floor heating operation it is important to limit |
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during disinfection operation or depending on the |
the minimum/maximum water temperature. |
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amount of hot water. |
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Owner’s Manual 5
Product Introduction
Product Introduction
Typical Installation Scene
1 |
3 |
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2 |
Water |
Water |
Inlet |
Outlet |
4 |
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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
Product Introduction
Remote Controller
WATER |
HEATING |
TEMP |
OPER |
MODE |
No |
Name |
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1 |
Display |
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2 |
Change Temperature Button |
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3 |
Water Heating Enable / Disable Button |
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4 |
Power Button |
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5 |
Operation Mode Selection Button |
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6 |
Silent Mode On / Off Button |
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7 |
Temperature Setting Mode Button |
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8 |
Temperature View Mode Button |
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9 |
Function Setting Button |
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10 |
Programming Button |
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11 |
Direction Button (Up, Down, Left, Right) |
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12 |
Set / Clear button |
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13 |
ESC Button |
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Owner’s Manual 7
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
Owner's Instruction
Mode Change
Turn on the product and select operation mode.
1Press power button to turn on the product.
2Press 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
1Press SET TEMP button to select each operation mode.
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Room temperature |
Leaving water |
Sanitary water tank |
|
temperature |
temperature |
2Adjust desired temperature by pressing change TEMP buttons on each mode.
To raise the temperature
To lower the temperature
η 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
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.
1Press OPER MODE button to select weather-dependent operation mode.
: Weather dependent operation icon
2Adjust the desired temperature level by pressing change TEMP buttons.
Cold Hot 
View Temperature
1Press 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)
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(Unit:°C) |
Temperature |
Temperature Range |
Display |
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below 11 |
Lo |
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Air |
11 ~ 39 |
actual temperature |
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above 39 |
Hi |
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below 0 |
Lo |
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Water |
0 ~ 92 |
actual temperature |
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above 92 |
Hi |
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10 Air-to-Water Heat Pump
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