LG THERMA V User manual

OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
P/NO : MFL57490703 www.lg.com
TYPE : (Air-to-Water Heat Pump)
ENGLISH SWEDISH NORWEGIAN FINNISH DANISH

2Air-to-Water Heat Pump
Air-to-Water Heat Pump Ownerʼs 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
■
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 ..........................6
Owner's Instruction ............................8
Using Thermostat .............................24
Maintenance and Service.................27

Safety Precaution
Ownerʼs Manual 3
ENGLISH
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■Incorrect 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.
• Otherwise it can cause electric shock or fire.
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.
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 outdoor unit on a
moving base or a place from where it
can fall down.
• The falling outdoor 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.

Safety Precaution
4Air-to-Water Heat Pump
Indoor/outdoor 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.
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.
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 outdoor 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.
• There is risk of fire or electric shock.
Do not place ANYTHING on the power
cable.
• There is risk of fire or electric shock.
When flammable gas leaks, turn off the
gas and open a window for ventilation
before turn the product on.
• Do not use the telephone or turn switches on
or off. There is risk of explosion or fire.
In outdoor 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.

Safety Precaution
Ownerʼs Manual 5
ENGLISH
CAUTION
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 outdoor 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. (outdoor units)
•
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.

6Air-to-Water Heat Pump
Product Introduction
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.
1
2
5
4
3
Water
Inlet Water Outlet
Typical Installation Scene

Product Introduction
Ownerʼs Manual 7
ENGLISH
❊Some functions may not be operated and displayed depending on the model.
Control Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
1. Display panel
2. Change temperature button
3. Silent mode On/Off button
4. Operation mode selection button
5. Water heating Enable/Disable
button
6. ESC button
7. Direction button
(Up, Down, Left, Right)
8. Power button
9. Function setting button
10. Temperature setting mode
button
11. Temperature view mode button
12. Programming button
13. Set/Clear button

8Air-to-Water Heat Pump
Owner's instruction
ELECTRIC HEATER STEP ONE
ELECTRIC HEATER STEP TWO
These icons indicate that the backup electric heater which is located inside the indoor unit 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 indoor 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.
In space heating operation or sanitary water tank heating operation, freezing of the outdoor
heat exchanger may be occured due to low outdoor temperature and humidity. If this risk
occurs, the product goes into defrost operation. It reverses the cycle and takes heat from the
indoor system to prevent freezing of the outdoor system. 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.
OUTDOOR
This icon indicates that the outdoor unit is active.
CHILD LOCK
NO FUNCTION
Monitoring Information
Owner's Instruction

Owner's instruction
Ownerʼs Manual 9
ENGLISH
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.

10 Air-to-Water Heat Pump
Selecting Target Temperature
❊Note
: Decrease 1°C or 2°F per one time pressing
: Increase 1°C or 2°F 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 instruction
Mode Change
Turn on the product and select operation mode.
Operation Mode
• Cooling Operation - The product yields cool water to use in under floor cooling or 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.
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
1
Press SET TEMP Button to select each operation mode.
2
Adjust desired temperature by pressing Change Temperature buttons on each mode.
To raise the Temperature
To lower the Temperature
Room temperature Leaving Water
temperature
Sanitary Water Tank
temperature

Ownerʼs Manual 11
ENGLISH
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 Temperature 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
1
Press repeatedly View
Temperature Button to select
each Temperature.
(Whenever press View
Temperature 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 Thermal Temperature
(ONLY displayed when sanitary
water heating mode)
View Temperature
Temperature Temperature Range Displayed as
below 11 Lo
Air 11 ~ 39 actual temperature
above 39 Hi
below 0(* below 40) Lo
Water 0 ~ 92(* 40 ~ 120) actual temperature
above 92(* above 120) Hi
(unit:°C)
(* : Solar Thermal Temperature)

12 Air-to-Water Heat Pump
Silent Mode Operation
Silent mode operation is that the outdoor unit works at reduced capacity so that the noise produced
by the outdoor unit drops.
This implies that the indoor heating and cooling capacity will also drop. Beware of this
when a certain level of heating or cooling is required indoors.
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 .)
Owner's instruction
Sanitary Water Heating Operation
<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
1
Press repeatedly View Button to enable sanitary tank heating.
2
Sanitary water heating operation is operating only on enable condition.
During operation, segment will be on.
<Sanitary Water Heating Disable> <Sanitary Water Heating enable>
<Sanitary Water Heating ON>
1
Press Silent Mode Button. This button ON or OFF silent mode.
<Silent Mode OFF> <Silent Mode ON>

Ownerʼs Manual 13
ENGLISH
Owner's instruction
This function is to prevent children or other people from using controller.
Child Lock
1
Press Function Setting Button to enter
user setting mode. (The segment will be flashed)
2
Press set/clear button to finish the selection.
The segment will be disappear.
4
To release this setting, pressing function Setting
button until icon flash and then enter
setting/clear button.
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.

Owner's instruction
14 Air-to-Water Heat Pump
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 userʼs input to stop, Quick Sanitary Tank
Heating mode will be finished.
Quick Sanitary Tank Heating
1
Press Sanitary Tanke Heating Enable button with up button for 3 seconds to start Quick
Sanitary Tank Heating. ʻSanitary Tank Heating Enableʼ icon and ʻSanitary tank heaterʼ
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.

Owner's instruction
Ownerʼs Manual 15
ENGLISH
On critical error, the product will be unconditional stop.
At this time, CH' and error code No. keep display by turns.
Critical error
<Display>
A problem is found inside the outdoor unit. As the outdoor unit has problem, the
emergency mode operation is performed by electric heater located in the indoor unit.
Heavy trouble
A problem is found inside the indoor unit. In most case, this trouble is concerned with
sensor problems. The outdoor unit is operating under emergency mode operation
condition which is configured by DIP switch No. 4 of the indoor unit PCB.
<Display>
Slight trouble
<Display>
When the error is occurred on indoor unit, the error code will be displayed on control panel.
Error code display

You can set current time.
Setting 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)
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 set/clear
button.
9
Press exit button to exit or system will automatically release without any
input 25 seconds.
5
Press up, down button to adjust the
Hour.
Owner's instruction
16 Air-to-Water Heat Pump

Ownerʼs Manual 17
ENGLISH
Owner's instruction
Programming : Setting Simple Reservation
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 setting/cancel button to complete
programming
4
Press exit button to exit or system will automatically release without any
input after 25 seconds.
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 setting/cancel 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.)

18 Air-to-Water Heat Pump
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.
6
Press up, down button to adjust the
Minute.
7
If you finish the setting, press setting/cancel button to complete
programming.
8
Press exit button to exit or system will automatically release
without any input after 25 seconds.
5
Press right button to move "Minute" part.
(the "Minute" segment will be flashed)
Owner's instruction

Ownerʼs Manual 19
ENGLISH
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.
6
Press up, down button to adjust the
Minute.
7
If you finish the setting, press setting/cancel button to complete
programming.
8
Press exit button to exit or system will automatically release
without any input after 25 seconds.
5
Press right button to move "Minute" part.
(the "Minute" segment will be flashed)

20 Air-to-Water Heat Pump
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)
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)
5
Press up, down button to adjust the
Hour on Start Time section.
Start Time Section
Off Time Section
Owner's instruction