LG THERMA V User manual

Please read this manual carefully before operating your set and retain it for future
reference.
(Air-to-Water Heat Pump)
Original instruction
OWNER’S MANUAL
AIR-TO-WATER
HEAT PUMP
MFL69676301
Rev.00_050219
www.lg.com
Copyright © 2016 - 2019 LG Electronics Inc. All Rights Reserved.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH ΕΛΛΗΝΙΚΆ ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

Table of contents
2Air-to-Water Heat Pump
TABLE OF CONTENTS
3 Safety Precautions
8 Instructions for the use of
owner’s manual
8 Important information
9 Glossary of used terms and conceptions
10 TERMOTRONIC controller
10 General
10 Controlling the device and heating system
11 Activating the device
11 Operation of the device
12 Standby
12 Operation HP STOP
12 Device HP STOP
13 Power outage
13 Display of the state of the device
14 Setting parameters
15 Setting the language
16 Quick settings
16 Setting the temperature of heating/cooling
18 Setting the temperature of heated water
21 Setting the temperature of DHW
22 Changing the operational mode -
winter/summer mode
24 Setting the cooling temperature
25 Switching on the additional heat source
26 Manual activation of the additional heat
source
28 Advanced settings
29 Heating settings
37 Operating mode
37 Setting the cooling system
38 Schedules
42 Alternative source
43 Programme for drying screeds
44 Meters for operating hours
45 Setting the date, hour and day of the week
45 Remote turn on/off
46 PV signal
46 Silent operation mode
47 User menus and parameters
47 Menu structure
54 Information display of
operation
55 Diagnostic displays
56 Display of the state of the device
58 Disruptions in operation,
alarms and troubleshooting
58 Troubleshooting
60 Maintenance and Service
60 Maintenance Activities
60 When the unit is not Operating
60 Call the service immediately in the following
situations
61 Settings of your heating
system at start-up
62 Search the Manual Using
Your Mobile

Safety Precautions
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.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
ENGLISH
Owner’s Manual 3
• This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
• This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of
experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand
the hazards involved. Children shall not play with the appliance. Cleaning
and user maintenance shall not be made by children without supervision.
• 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.
WARNING
CAUTION
!
!
WARNING
!

4Air-to-Water Heat Pump
Safety Precautions
• 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.
• 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
terminals.
- Improper or loose connections can cause heat generation or fire.

Safety Precautions
ENGLISH
Owner’s Manual 5
• 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.
• 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
conducting the repair work.
- An charged capacitor can cause electrical shock.
• 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.

Safety Precautions
6Air-to-Water Heat Pump
• 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.
• 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.
CAUTION
!

Safety Precautions
ENGLISH
Owner’s Manual 7
• 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.
• 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.

Instructions for the use of owner’s manual
8Air-to-Water Heat Pump
Before first use, read owner’s manual thoroughly and learn its content. You will learn the purpose,
functions and the handling procedures for the device.
In case of malfunctions of the heating system, firstly, read the sections(Disruptions in operation,
alarms and troubleshooting) and consult your installer who will find the reason for the malfunction
and resolve it. In case the malfunction cannot be resolved, he will contact the customer service of the
manufacturer who will resolve the malfunction.
Important information
The instructions are written to give you information on all the needed activities before the first and
further use. The manual describes the process of setting up and use of the device.
Incorrectly set parameters of the control unit can lead to stoppage or incorrect operation of the
device. To avoid risks, make note of what each symbol denotes as described below. Follow all
general safety instructions and warnings associated with the operation.
NOTE
If this product is being handed over to a third person, ensure that you provide them with this
manual too.
Instructions for the use of owner’s manual

Instructions for the use of owner’s manual
ENGLISH
Owner’s Manual 9
Glossary of used terms and conceptions
- ALTERNATIVE SOURCE: The heat source is used for systems with solar collectors, masonry
heaters and wood stoves when we either do not have a heat source on hand at any moment or an
automatic switch through the signal from the controller of the device (i.e. in a wood stove) is not
possible.
- AUXILIARY EXTERNAL SOURCE: The heat source (i.e. oil/gas/pellet/external heater furnace) that
can be used with the device alternately-for example, for the controller of the device, the signal is
alternately transmitted by the automatic switch. In case of device malfunctioning(in the anti-freeze
programme), the alternative source can take over the task of heating for a short time.
- ADDITIONAL SOURCE or Backup source: The electric flow heater installed in the device and turns
on in the case of device malfunctioning (in the antifreeze program). This ensures temporary
operation for bridging the time until an authorized person from the service company arrives to
correct the error. The additional source can also be used for bivalent heating operation. This means
that in case the heat pump no longer has the heating capacity that could cover the heat losses of
the building (very low ambient temperatures), the electrical heater turns on to provide additional
heat. Both heat sources work in bivalent parallel operation.
- HEATING WATER: The liquid which flows inside the heating system (pipelines, floor, wall and
radiator heating).
- DHW: The water intended for sanitary use (cleaning, showering, washing ...).
- HEAT PUMP (HP): The device which takes energy from the environment and supplied mechanical
work and adds warmth to heating and DHW. In the text below the term ‘device’ will be used for the
heat pump.
- AW: The device takes heat from the air.
- Parameter NORMAL: The desired temperature of heating in the Normal mode of operation.
- Parameter ECO: Lowering the desired temperature in the Eco mode of operation.
- Parameter COMFORT: Raising the desired temperature in the Comfort mode of operation.

TERMOTRONIC controller
10 Air-to-Water Heat Pump
Controlling the device and heating system
The device and heating system can be controlled with the use of 4 buttons on the controller interface
TERMOTRONIC. The controller interface has a 4-line LCD screen which displays the current state of
the device or controller and a LCD light indicator of malfunctions operation of the device ALARM).
The controller interface TERMOTRONIC in devices:
General
TERMOTRONIC is a self-adapting controller for controlling the heat pump (DEVICE) and the heating
system. It controls operation of the device to ensure the most efficient way to produce the desired
temperature of the building based on the of the heating system and outside temperature.
The TERMOTRONIC controller offers controlling the device and the heating system of the building
(not more than 4 heating circuits) as well as controlling the heating with an alternative heat source,
active cooling with the device, heating DHW with the device and/or alternative heat source and/or
backup source.
Possibility of controlling the elements of the heating system with the controller TERMOTRONIC:
- 1 x Direct circuit,
- 1 x direct or mixing circuit,
- Domestic Hot Water,
- Heat curve (based on outside temperature),
- Cooling (floor, fan coil),
- Control of additional external heat source (oil or gas boiler).
With the optional expansion module, you can expand the functionality to:
- 2 x additional direct or mixing circuits,
- DHW circulation,
- Alternative heat source (Thermo-solar Collectors or Biomass furnace) for heating only.
- Display of Buffer tank temperatur
TERMOTRONIC controller