LG THERMA V AHUW126A3 User manual

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Please read this manual carefully before operating
your set and retain it for future reference.
OWNER’S MANUAL
AIR-TO-WATER
HEAT PUMP
P/NO : MFL68680907
Original instruction
Copyright © 2017 LG Electronics Inc. All Rights Reserved.
ENGLISH TÜRKÇE

2Air-to-Water Heat Pump
Air-to-Water Heat Pump Owner’s Manual
TABLE OF CONTENTS
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
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.
Safety Precautions .............................3
Product Introduction ..........................8
Operation Setting..............................10
Temperature Setting.........................12
Low Noise mode ...............................15
Lock Setting ......................................17
Date setting .......................................19
Timer Setting.....................................20
Schedule Setting...............................25
Using Thermostat .............................27
Maintenance and Service.................30

Safety Precautions
Owner’s Manual 3
ENGLISH
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by
the following indications.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
WARNING
• Always ground the product.
- There is a risk of electric shock.
• Do not use a defective or underrated circuit breaker. Use the correctly rated
breaker and fuse.
- There is risk of fire or electric 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.
• 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.
• 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.
• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock due to dust, water etc.
• Use the correctly rated breaker or fuse.
- 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.
• For installation, removal or reinstall , always contact the dealer or an
Authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.

4Air-to-Water Heat Pump
Safety Precautions
• 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.
• 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.
• 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 be used. Please read the label on the
product.
- Incorrect refrigerant can prevent the normal operation of the unit.
• 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 touch , operate, or repair the product with wet hands.
- There is risk of electric shock or fire.
• 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 termi-
nals.
- Improper or loose connections can cause heat generation or fire.
• Safely dispose off the packing materials. Like screws, nails, batteries, bro-
ken 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.
• 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.
• In unit the step-up capacitor supplies high voltage electricity to the electrical
components. Be sure to discharge the capacitor completely before conduct-
ing the repair work.
- An charged capacitor can cause electrical shock.

Safety Precautions
Owner’s Manual 5
ENGLISH
• When installing the unit, use the installation kit provided with the product.
- Otherwise the unit may fall and cause severe injury.
• Be sure to use only those parts which are listed in the service parts list.
Never attempt to modify the equipment.
- 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.
- Oxygen deficiency could occur and hence harm your health.
• 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.
• 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.
• 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.
• Turn the main power off when cleaning or repairing the product.
- There is risk of electric shock.
• 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.
• 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 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 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, you should be wear protection or wait
time to return to normal temperature.
- Otherwise , it may cause burns or frostbite, personal injury.
• Do not touch leaked refrigerant directly.
- There is risk of frostbite.

Safety Precautions
6Air-to-Water Heat Pump
• 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.
• Do not heated to a temperature of more than provided by the product.
- Otherwise, it may cause fire or damage of product.
• Two or more people must lift and transport the product.
- Avoid personal injury.
• Do not install the product where it will be exposed to sea wind (salt spray)
directly.
- It may cause corrosion on the product.
• Keep level even when installing the product.
- To avoid vibration or noise.
• 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.
• Always check for gas (refrigerant) leakage after installation or repair of
product.
- Low refrigerant levels may cause failure of product.
• 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 block the inlet or outlet of air flow.
- It may cause product failure.
• 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.
• Do not step on or put anyting on the product.
- There is risk of personal injury and failure of product.
• 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.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury.
CAUTION

Safety Precautions
Owner’s Manual 7
ENGLISH
• If the refrigerant gas leaks during the repair, do not touch the leakaing
refrigerant gas.
- The refrigernat gas can cause frostbite (cold burn).
• Do not tilt the unit when removing or uninstalling it.
- The condensed water inside can spill.
• 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.
• 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 refrigerant oil and eventual parts
should be done in accordance with local and national standards.
• Do not expose your skin or kids or plants to the cool or hot air draft.
- This could harm to your health.
• Use a firm stool or ladder when cleaning, maintaining or repairing the
product at an height.
- Be careful and avoid personal injury.
• The hot water may not be available immediately, during disinfection
operation or depending on the amount of hot water.
• During floor heating operation it is important to limit the minimum/maximum
water temperature.

Product Introduction
8Air-to-Water Heat Pump
Product Introduction
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.
4
3
Water
Out
Water
In
1
2
5
Typical Installation Scene

Product Introduction
Owner’s Manual 9
ENGLISH
Remote Controller
OK On/Off Button
OK Button
Back button
Up/Down/Left/Right
Button
Operation display
window
Operation display window Operation and Settings status display
Back button When you move to the previous stage from the menu’s
setting stage
Up/down/left/right button When you change the menu’s setting value
OK button When you save the menu’s setting value
On/Off button When you turn ON/OFF the air conditioner

Operation Setting
10 Air-to-Water Heat Pump
You can easily control the desired operation mode.
In the main screen, press [<, > (left/right)] button to select the operation mode or home leave or hold
category, and press [∧, ∨(up/down)] button to set the operation mode.
※ Some products may not support some operation modes.
This mode is only applied to heating.
In order to save energy and to give highest comfort, setting temperature will follow outside tempera-
ture. 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 proce-
dure and will be adapted to the site characteristic.
1. Select AI / Auto mode.
Operation mode
AI / Auto operation
Operation Setting
Mode Description
Cool The product yields cool water to use in FCU cooling.
Heat The product yields hot water to use in under floor heating or FCU heating.
AI / Auto In this mode, heating setpoint is automatically determined by pre-defined
temperature profile.

Operation Setting
Owner’s Manual 11
ENGLISH
hNote
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 
2. Select the desired temperature category
3. Adjust the desired temperature level by press [∧, ∨(up/down)] button.

Temperature Setting
12 Air-to-Water Heat Pump
You can easily control to the desired temperature.
• In the main screen, press [<, > (left/right)] button to select the desired temperature category, and
press [∧, ∨(up/down)] button to set the desired temperature.
- In the cooling, heating, and AI/auto mode, the desired temperature control is possible.
Temperature Setting
Mode Description
Room
temperature
Room temperature setting is available when remote room air sensor (sold
separately) is installed
Leaving water
temperature
If the desired temperature is lower than the water temperature, the heating
is not performed.
Set the desired temperature higher than the water temperature.
DHW tank
temperature DHW tank temperature setting is available when DHW tank is installed.

Temperature Setting
Owner’s Manual 13
ENGLISH
<Note>
• This function is not used when the DHW tank is not installed.
• If you want to know more information, refer function on installation information section.
Funtion to set whether or not to use a installed DHW tank
DHW Heating Operation
If there is urgent DHW heating demand, Quick DHW Tank Heating mode can be used to reduce the
time to reach target DHW tank temperature by forcibly turning on DHW tank heater.
After reaching target DHW tank temperature or by user’s input to stop, Quick DHW Tank Heating
mode will be finished.
1. Press down [Back] button for a second focused on DHW Heating Operation.
Quick DHW Tank Heating

Temperature Setting
14 Air-to-Water Heat Pump
You can check the current temperature.
• In the main screen, you can enter the monitoring screen by pressing [Back] button.
View Temperature
Mode Description
Room
temperature View room temperature
Inlet
temperature View inlet temperature
Outlet
temperature View outlet temperature
DHW
temperature
View DHW temperature
(Only displayed when DHW heating mode)
Solar heat
temperature
View solar power temperature
(Only displayed when DHW water heating mode)

Low Noise mode
Owner’s Manual 15
ENGLISH
Low Noise mode is that the unit works at reduced capacity so that the noise produced by the unit
drops.
1. In the menu screen, press [<, > (left/right)] button to select “setting” category, and press [OK] but-
ton to move to the setting list screen.
Low Noise mode
OK

Low Noise mode
16 Air-to-Water Heat Pump
This implies that the heating and cooling capacity will also drop. Beware of this when a
certain level of heating or cooling is required.
Low Noise mode operation may not work while the product is proceeding higher priority
operation such as defrost operation, anti-freezing operation, and etc.
3. Press [<, > (left/right)] button to select the parts and press [∧, ∨(up/down)] button to adjust the
time
2. In the setting list, if you press [∧, ∨(up/down)] button, you can turn on/off Low Noise Mode.
OK

Lock Setting
Owner’s Manual 17
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• It is the function to lock the button operation of the remote controller so that children or other per-
sons cannot use it without permission.
• It is the function to limit the desired temperature range that can be set in the wired remote controller.
1. In the menu screen, press [<, > (left/right)] button to select “lock setting” category, and press [OK]
button to move to the lock setting list screen.
Lock setting – all, on/off, mode, DHW lock
Lock Setting
OK

Lock Setting
18 Air-to-Water Heat Pump
2. In the lock setting list, if you press [∧, ∨(up/down)] button, you can turn on/off the corresponding
lock function.
Mode Description
All lock It locks all button operation of the remote controller.
On/Off lock It locks the On/Off button operation of the remote controller.
DHW lock It locks the DHW On/Off button operation of the remote controller.
Mode lock It locks the operation mode button operation of the remote controller.

Date setting
Owner’s Manual 19
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Set the date displayed on the remote controller.
• In the user setting list, select the date category, and press [OK] button to move to the detail screen.
• After the setting, if you press [OK] button, the setting is saved and moves to the previous screen.
OK
Date setting

Timer Setting
20 Air-to-Water Heat Pump
Set the time displayed on the remote controller.
• In the user setting list, select the time category, and press [OK] button to move to the detail screen.
• After the setting, if you press [OK] button, the setting is saved and moves to the previous screen.
OK
Timer Setting