LG MFL68026705 Air-To-Water Heat Pump Owner’s Manual

OWNER’S MANUAL
AIR-TO-WATER HEAT PUMP

Please read this manual carefully before operating your set and retain it for future reference.

Original instruction

MFL68026705
Rev.06_090721

www.lg.com
Copyright © 2018 – 2021 LG Electronics Inc. All Rights Reserved.

INTRODUCTION

What is AWHP(Air to Water Heat Pump)?

• Air to Water Heat Pump system can be used as various heating solutions from floor heating to hot water supply with multiple heat sources. It is 4 times more energy-efficient than a conventional system.
• High efficiency with conventional boiler functions.

Why is AWHP(Air to Water Heat Pump)?

• Various regulations are implemented in Europe to reduce the energy use of building heating.
• Also, AWHP-related subsidy programs are implemented by the country.

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.

How to find additional model information
Energy Labels and Product Fiches for all possible combinations can be found at https://www.lg.com/global/support/cedoc/cedoc.
Search for an outdoor unit name on the Medoc page.

For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes. Write the model number and the serial number here:
Model number:——————————————————————-
Serial number:——————————————————————–
You can find them on a label on the side of each unit.
Dealer’s name:——————————————————————–
Date of purchase:—————————————————————-

SAFETY INSTRUCTIONS

| Read the precautions in this manual carefully before operating the unit.| | This appliance is filled with flammable refrigerant (R32)
---|---|---|---
| This symbol indicates that the Operation Manual should be read carefully.| | This symbol indicates that service personnel should be handling this equipment with reference to the Installation Manual.

The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect operation of the appliance.
The guidelines are separated into ‘WARNING’ and ‘CAUTION’ as described below.

**** This symbol is displayed to indicate matters and operations that can cause risk.
Read the part with this symbol carefully and follow the instructions in order to avoid risk.

WARNING
This indicates that the failure to follow the instructions can cause serious injury or death.

CAUTION
This indicates that the failure to follow the instructions can cause minor injury or damage to the product.

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 a risk of fire or electric shock.

• Do not use a multi-outlet. Always use this appliance on a dedicated circuit and breaker.
  – There is a 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 a 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 lightning rods or telephone ground wire.
  – There is a risk of fire or electric shock.

• Install the panel and the cover of the control box securely.
  – There is a risk of fire or electric shock due to dust, water, etc.

• Use the correctly rated breaker or fuse. – There is a 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 a risk of fire or electric shock.

• For installation, removal, or reinstallation, always contact the dealer or an Authorized Service Center.
  – There is a 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 the product to fall.

• Never install the unit on a moving base or a place from where it can fall
  – The falling unit can cause damage or injury or even death to 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 a risk of fire or electric shock.

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

• Don’t use a power cord, a plug, or a loose socket that is damaged.
  – Otherwise, it may cause a fire or electrical shock.

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

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

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

• Do not store or use or even allow flammable gas or combustibles near the
  – There is a 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.

• Safely dispose of 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 the 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 a risk of physical injury, electric shock, or product failure.

• If strange sounds, smells or smoke come from the product, immediately turn the breaker off or disconnect the power supply cable.
  – There is a 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 a 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 the power cable could not be pulled out or damaged during operation.
  – There is a risk of fire or electric shock.

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

• Do not touch the refrigerant pipe and water pipe or any internal parts while the unit is operating or immediately after operation.
  – There is a 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 a risk of frostbite.

• Make sure to install a 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 heat to a temperature of more than provided by the product.
  – Otherwise, it may cause fire or damage to the product.

• This appliance is intended to be used by an expert or trained users in shops, in the light industry, on farms, or for commercial use by laypersons.

• Do not step on the unit and do not put anything on it.
  It may cause an injury through the dropping of the unit or falling down.

• When flammable gas leaks, turn off the gas and open a window for ventilation before turning the product on. Do not use the telephone or turn switches on or off.
  – There is a risk of explosion or fire.

• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases.
  Otherwise, it may cause fire or explosion.
  – There is the risk of death, injury, fire or explosion.

• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.

• The appliance shall be stored in a room without continuously operating open flames (for example an operating gas appliance) and ignition sources (for example an operating electric heater).

• The appliance shall be stored so as to prevent mechanical damage from occurring.

• Any person who is involved with working on or breaking into a refrigerant circuit should hold a currently valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with industry-recognized assessment specifications.

• Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

• Keep any required ventilation openings clear of obstruction.

• Ducts connected to an appliance shall not contain an ignition source.

• If anyone other than licensed professional installs, repairs, or alters LG Electronics air conditioning products, the warranty is voided.
  – All costs associated with repair are then the full responsibility of the owner.

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 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 the product.
  – Low refrigerant levels may cause the failure of the 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 a risk of damage or loss of property.

• Do not block the inlet or outlet of airflow.
  – It may cause product failure.

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

• Do not step on or put anything on the product.
  – There is a 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 leaking refrigerant gas.
  – The refrigerant 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 harmful to 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 your health.

• Use a firm stool or ladder when cleaning, maintaining, or repairing the product at a 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.

• Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

• In order to avoid a hazard due to inadvertent resetting of the thermal cutout, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

• Do not install the unit in potentially explosive atmospheres.

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 the 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 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 the 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.

PRODUCT INTRODUCTION

Name and function of parts

• The feature may vary according to the type of model.

  1. Unit
  2. Remote controller
  3. Water out (PT 25A)
  4. Water in (PT 25A)
  5. Hole for communication (Ø25)
  6. Hole for unit power supply (Ø25)
  7. Inlet air
  8. Outlet air

Remote controller

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

NOTE

• Some functions may not be operated and displayed depending on the product type.
• The actual product can be different from the above contents depending upon model type.
• When using a simultaneous operation system, whenever press remote controller button, the system will approximately operate after 1~2 minutes.

DESCRIPTION OF THE OPERATION

Main screen

On the main screen, press the [<, >(left/right)] button to select the category to set, and you can control it by pressing the [∧,∨ (up/down)] button.

Menu screen

On the main screen, press the [<, >(left/right)] button to select the menu and press the [OK] button to move to the menu screen.

In the menu screen, press the [<, >(left/right)] button to select the category to set, and press the [OK] button to move to the detail screen.

Setting screen

Select the category to set using the [∧,∨(up/down)] button.

In each detail screen of the menu, as in the box in the left figure, when “<,>” icons are displayed at the same time, you can immediately apply the setting value by pressing [<, >(left/right)] button.
※ For the values that can be set in each category, refer to the detailed manual for each function.

In each detail screen of the menu, as in the box in the left figure, if only the “>” icon is displayed, you can move to the detail setting screen by pressing the [>(right) or OK] button.
※ For the values that can be set in each category, refer to the detailed manual for each function.

Popup screen

The toast message is the message displayed at the bottom of the screen when an operation is turned On/Off or if a function is set/canceled.
The popup message is mainly displayed when an error occurred in the product.

Monitoring (For 3 Series)

On the main screen, you can enter the monitoring screen by pressing the [Back] button
In the monitoring screen, you can check the following information,
– The room temperature
– The water inlet/outlet temperature
– The water pump operation

Returning to the screen

In the main screen, after moving to the category by pressing the [<,

(left/right)] button, if there is no remote controller operation, after 10 seconds, it returns to the main screen’s basic position. (basic position: indoor temperature display part)
In the screens except for the main screen, if there is no remote controller operation for 1 minute, it moves to the main screen.

Monitoring (For 4 Series)

On the main screen, you can enter the monitoring screen by pressing the [Back] button
In the monitoring screen, you can check the following information,
– The room temperature
– The water inlet/outlet temperature
– The water pump operation
– The water flow rate
– The water pressure
– The solar heat temperature
– The outdoor temperature

Returning to the screen

In the main screen, after moving to the category by pressing the [<,

(left/right)] button, if there is no remote controller operation, after 10 seconds, it returns to the main screen’s basic position. (basic position: indoor temperature display part)
In the screens except for the main screen, if there is no remote controller operation for 1 minute, it moves to the main screen.

OPERATION SETTING

On/Off

will be turned on or off.
Press the remote controller’s (On/Off) button.
– If the product is in operation, the On/Off button will be illuminated.
If the product is off, the On/Off button backlight will be off.

Operation mode

You can easily control the desired operation mode.
In the main screen, press the [<,>(left/right)] button to select the operation mode or home leave or hold category, and press the [∧,∨(up/down)] button to set the operation mode.
※ Some products may not support some operation modes.

Mode

|

Description

---|---
Cool| Cool the room to the desired temperature.
Activated when No. 4 ON of indoor unit PCB DIP SW 2 (Refer to installer setting)
Heat| Heats the room to the desired room temperature.
AI / Auto| The product automatically provides the appropriate fan speed based on the temperature of the room.

Cooling operation

The cooling operation’s minimum setting temperature is 5 °C.

• The desired temperature can be controlled in the units of 1 °C.
  – Set the desired temperature lower than the water temperature.
  – water temperature is displayed on the default screen of the remote controller.
  – If the setpoint is set higher than the water temperature, then the unit will remain in the cool mode but will not begin to cool until the water temperature exceeds the setpoint.
  – If your unit is operating in cooling mode and you press the [On/Off] button the cooling operation will shut off.

NOTE
Activated when No. 4 ON of indoor unit PCB DIP SW 2 (Refer to installer setting)

What is a 3-minute delay function?
After the cooling stops, when the product is started right away, the reason that the cold water does not come out is that it is the function to protect the compressor.
The compressor starts after 3 minutes and the cold water comes out.

NOTE
The compressor starts after 3 minutes and the cold water comes out.
In the cooling operation, you can select the desired temperature in the range of 5 °C~27 °C.
The favorable temperature difference between the water inlet temperature and outlet temperature is 5 °C.

Heating operation

The heating operation’s minimum setting temperature is 15 °C.

• The desired temperature can be controlled in the units of 1 °C.
  – Set the desired temperature higher than the water temperature.
  – Water temperature is displayed on the default screen of the remote controller.
  – When the desired temperature is set lower than the water temperature, warm water doesn’t come out.
  – If your unit is operating in heating mode and you press the [On/Off] button the heating operation will shut off.

NOTE
In the heating operation, you can select the desired temperature in the range of 15 °C~65 °C.

AI/Auto operation

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

1. Select AI/Auto mode.
2. Select the desired temperature category
3. Adjust the desired temperature level by pressing the [∧,∨(up/down)] button.

NOTE
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

TEMPERATURE SETTING

Controlling the desired temperature

You can easily control the desired temperature.

• In the main screen, press [<, > (left/right)] button to select the desired temperature category, and press the [∧,∨(up/down)] button to set the desired temperature.
  – In the cooling, heating, and AI/auto mode, the desired temperature control is possible.

Mode

|

Description

---|---
Room temperature| Room temperature can be set by using the remote sensor’s internal temperature sensor.
Room1 & Room2 temperature| The temperature of Room 1 and Room 2 can be set respectively when the 2nd circuit option is activated in installer mode.
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.
Water inlet temperature| This operation is changed to the temperature sensor only, the inlet temperature sensor, and temperature control logic is the same as the leaving water temperature operation.
Room temperature + Leaving water temperature| Room temperature can be set by using the remote sensor’s internal temperature sensor. If the desired temperature is lower than the water temperature, the heating is not performed. Set the desired temperature higher than the water temperature.

NOTE
The function can be activated according to the installer setting.

NOTE
Room 1 = Circuit 2 = Mixing circuit
Room 2 = Circuit 1 = Direct circuit

Select Temperature Sensor

There are 3 sensor options, air only, leaving water only, and air+water in installer mode.
Sensor Locations are not available on all models.

DHW heating operation

Function to set whether or not to use an installed DHW tank

NOTE

• This function is not used when the DHW tank is not installed.
• If you want to know more information, refer function on the installation information section.

Quick DHW tank heating

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

1. Press down the [Back] button for a second focused on DHW Heating Operation.

View temperature

General mode
You can check the current temperature.

• On the main screen, you can enter the monitoring screen by pressing the [Back] button.

Mode

|

Description

---|---
Room temperature| View room air temperature
Inlet temperature| View inlet water temperature
Outlet temperature| View outlet water temperature
DHW temperature| View DHW temperature
(Only displayed when set to DHW heating mode)
Solar heat temperature| View solar thermal system temperature (Only displayed when set to DHW heating mode and solar thermal heating mode)
Outdoor temperature| View outdoor temperature

2nd circuit mode

Mode

|

Description

---|---
Room 1 temperature| View room 1 temperature
Room 2 temperature| View room 2 temperature
Inlet temperature| View inlet water temperature
Outlet temperature| View outlet water temperature
DHW temperature| View DHW temperature (Only displayed when set to DHW heating mode)
Solar heat temperature| View solar thermal system temperature (Only displayed when set to DHW heating mode and solar thermal heating mode)
Outdoor temperature| View outdoor temperature

LOCK SETTING

How to enter the Lock setting

• In the menu screen, press the [<,>(left/right)] button to select the “lock setting” category, and press the [OK] button to move to the lock setting list screen.
• In the lock setting list, if you press the [∧,∨(up/down)] button, you can turn on/off the corresponding lock function.

Lock setting – all, on/off, mode, DHW lock

• It is the function to lock the button operation of the remote controller so that children or other persons cannot use it without permission.
• It is the function to limit the desired temperature range that can be set in the wired remote controller.

Mode|

Description

---|---
All Lock| It locks all button operations of the remote controller.
On/Off Lock| It locks the On/Off button operation of the remote controller.
Mode Lock| lock It locks the operation mode button operation of the remote controller
DHW Lock| lock It locks the DHW On/Off button operation of the remote controller.

NOTE

• DHW lock is not used when the DHW tank is not installed.
• If you want to know more information, refer function on the installation information section.

NOTE
In the central controller, when the central control temperature range lock is set, the wired remote controller’s temperature lock setting is cleared.
The temperature change by external equipment is reflected regardless of the remote controller temperature range lock.

TIMER SETTING

Timer entrance and setting method

• In the menu screen, press the [<,>(left/right)] button to select the timer category, and press the [OK] button to move to the timer setting list screen.
• In the timer setting list screen, press the [∧,∨(up/down)] button to select the timer to set, and press the [OK] button to move to the detail screen.
• After setting the value, when you press the [OK] button, the timer is activated.
• After setting the value, if you press the [Back] button, the changed value will not be applied.

Simple Timer

You can easily set the timer in the range of 1~7 hours in the units of 1 hour.

NOTE
If the product operation is On, the easy timer turns off the operation after the corresponding time.
If the product operation is Off, the easy timer turns on the operation after the corresponding time.
If the easy timer operation is turned On/Off before the timer operation, the set timer will be cleared.

Turn-On Reservation

The product is automatically turned On at the set timer time.

It provides 2 Time formats, 12 Hours(AM/PM) or 24 Hours reference.

NOTE
Even if the Turn-on Reservation operation is turned On/Off after the setting and before the timer operation, the set timer is not cleared.

Turn-Off Reservation

The product is automatically turned Off at the set timer time.

It provides 2 Time formats, 12 Hours(AM/PM) or 24 Hours reference.

NOTE
Even if the Turn-off Reservation operation is turned On/Off after the setting and before the timer operation, the set timer is not cleared.

SCHEDULE SETTING

How to enter the schedule

• In the menu screen, press the [<,>(left/right)] button to select the schedule category, and press the [OK] button to move to the schedule setting list screen.
• In the schedule setting list screen, press the [∧,∨(up/down)] button to select the menu to set, and press the [OK] button to move to the detail screen.
• There are 4 options in the schedule formula, depending on product function.
  – Room
  – Hot water / DHW
  – Heater of hot water tank / DHW heater
  – DHW recirculation

NOTE
Even though there is a heater of hot water tank schedule option, It cannot be activated in case of sterilization operation.

Daily schedule

It is the function that can check the status of the timer (schedule) saved in the remote controller.

• In the schedule list, select the daily schedule status category, and press the [OK] button to move to the detailed daily schedule status screen.
• You can use the remote controller’s [<,>(left/right)] button to check the timer information of other dates.
• You can use the remote controller’s [∧,∨(up/down)] button to check the corresponding date’s other timer information.
• Select the timer information, and press the [OK] button to move to the corresponding timer’s edit screen.

NOTE
In the daily schedule status screen, even if the timer (schedule) is set, if the corresponding data is designated as an exception date, the schedule will not be performed.
Less than 5 schedules per day are recommended.

Schedules & Edit

It is the function that can check the status of the timer (schedule) saved in the remote controller.

• In the schedule list, select the daily schedule status category, and press the [OK] button to move to the daily schedule status detail screen.

• You can use the remote controller’s [<,>(left/right)] button to check other dates’ timer information.

• You can edit the saved schedule’s timer information.
  – Select the schedule to edit using the [∧,∨(up/down)] button, and press the [OK] button to move to the edit screen.

• Select the timer information, and press the [OK] button to move to the corresponding timer’s edit screen.

Schedules & Edit – Add schedule

Description of each stage in Add schedule

In ‘Stage 1’, it sets the period to perform the timer.
In ‘Stage 2’, it sets the day of the week to perform the timer.
– You can select ‘Every day / Weekend / Weekdays / Individual selection’.
In ‘Stage 3’, it sets the start time for the timer.
In ‘Stage 4’, it sets the timer operation information.
– If ‘Stop’ is selected, you cannot set the mode/temperature
When stages 1~4 are completed, along with the message of ‘schedule is added’, it moves to the View and edit schedule screen.

Exception Day

It is the function to automatically stop the operation on the set timer day.

• In the schedule list, select the exception day category, and press the [OK] button to move to the Exception day designation detail screen.
• On the exception day, you can check, and add/change/delete the exception day information saved in the remote controller.
  – To add an exception day, in the Exception day registration detail screen, designate year/month/day, and press the [OK] button to save the Exception day.
  – Select the Exception day to edit using the [∧,∨(up/down)] button, and press the [OK] button to move to the edit screen. – In the exception day edit screen, you can check, delete/change the corresponding exception day’s setting contents.
  – When you change the exception day information, you need to save it after the change.

DHW Recirculation Schedule (For 4 Series)

It is the function that can check the status of the DHW recirculation timer (schedule) saved in the remote controller.

• In the schedule list, select the DHW recirculation schedule status category, and press the [OK] button to move to the daily schedule status detail screen. – The DHW recirculation schedule can be set up to 4 times.
• Select the timer information, and press the [OK] button to move to the corresponding timer’s edit screen.

NOTE
This function does not default.
It can be activated, after setting the value in installer mode.

Description of each stage in Add schedule

• Stage 1. Usage setting
  – It sets the use of the timer setting.
  – Select ‘Use’ to move on to the next stage

• Stage 2. Time setting setting
  – It sets the period to perform the timer.
  – The end time cannot be earlier than the start time.

• Stage 3. Day of week setting
  – It sets the day of the week to perform the timer.
  – You can select ‘Customize/Weekend/Weekday/Everyday’.

NOTE
If you select ‘Not use’ again in stage 1 after completing the schedule set, the timer does not work. but the setting value remains, and when selecting ‘Use’ again, the same setting value can be used.

ENERGY MONITORING SETTING (For 4 Series)

Energy Monitoring Setting

It is the function that can check the status of energy and power on the screen. It calculates power data to create data for energy monitoring. This function can be activated in installer mode.

If the heater of the unit is used, the heater power can be calculated after setting the heater information on the remote controller
NOTE
The accuracy of the energy monitoring functionality calculated by the product cannot be guaranteed. This function is not available when using ESS

Information of Energy Monitoring

It provides useful information on the amount of energy and power during the week/month/year. Opening the “Energy “option, these are presented on screen.

Instantaneous Power

Power/Calorie

The information includes instantaneous power as well as power usage and up to annual trend.

METER INTERFACE SETTING

Connection path of meter interface

It is the function that can check the status of energy and power on the screen. It collects and calculates power or calorie data to create data for energy monitoring and energy warning alarm pop-ups. This function can be activated in installer mode.

(For 3 Series)

(For 4 Series)

There are 2 options, Modbus address, and the unit, in this function. Activating the Modbus address option, you choose one address(B0 or B1) or don’t use it. Then, you set the port and specification in the range of 0000.0~9999.9[pulse/kW] as shown in the figure below.

Information of meter interface

It provides useful information on the amount of energy and power during the week/month/year. Opening the “Energy “option, these are presented on screen.

Instantaneous Power

Power/Calorie

The information includes instantaneous power as well as power/calorie usage and up to annual trend.

Energy Setting

In addition, various energy settings are possible as shown below.
The current value reaches the defined target value, It alerts you on display

FUNCTION SETTING

How to enter function setting

To enter the menu displayed at the bottom, you need to enter the function setting menu as follows.

• In the menu screen, press the [<,>(left/right)] button to select the setting category, and press the [OK] button to move to the setlist.
• In the setting list, select the function setting category, and press the [OK] button to move to the function setting list.

Function setting

Menu

|

Description

---|---
Low Noise Mode Time| It is the function to set the start and end time of the outdoor unit’s low noise mode operation.
Wi-Fi Pairing| It is the function to control remotely through the network with an indoor unit.
Water Temperature Setting| If you select (Air + Water) as the temperature control mode, This option is activated on screen. It is the function to set target water temperature.
3nd Party Boiler| It is the function to link the boiler of other companies. (this function can be activated, after setting every value in installer mode.)

Low Noise Mode Time

It is the function to set the start and end time of the outdoor unit’s low noise mode operation.

• In the function setting list, select the Low Noise Mode Time category, and press the [OK] button to move to the detail screen.
  – After setting the start time and the end time, press the [OK] button to move to the upper-level list.
  – If the start time and the current time are the same, it enters the outdoor unit low noise operation mode, and in the monitoring screen, the ‘in outdoor unit low noise operation mode’ message is displayed.
  – If the end time and the current time are the same, the outdoor unit’s low noise operation mode is cleared.

NOTE
Low noise mode time setting function can be set only when the installer setting’s outdoor unit function M/S setting is set to “Master”.
Low noise mode time setting function is only available in some products.

CAUTION
If the function is not used, please set it to Off.
When you enter the low noise operation, the cooling capacity may be degraded.

Wi-Fi Pairing

It is the function to control remotely through the network with an indoor unit.

Water Temperature Setting

If you choose the air+water temperature control way, this option is listed upon the function setting display. It is the function to set the upper limit of water temperature while controlling the unit based on room air temperature.

auto mode setting

NOTE
This function does not default.
It can be activated, after setting the value in installer mode.
It can be different by model.

3nd Party Boiler

NOTE
This function does not default.
It can be activated, after setting the value in installer mode.

Function to set whether or not to use an installed 3rd Party function.

If the mode of this function is set to “Manual”, you can set the temperature of the boiler and hysteresis, respectively.

AS shown above, After every setting is completed in installer mode, 3rd party boiler option is activated in the function list.

On/off mode of this option is opened by pushing the “<” or “>” button simply and easily.

USER SETTING

How to enter user setting

To enter the menu displayed at the bottom, you need to enter the user setting menu as follows.

• Select the setting category, and press the [OK] button to move to the setlist.
• Select the user setting category, and press the [OK] button to move to the user setting list.

User Setting

• You can set the product user functions.
• Some functions may not be available in some product types.

Menu|

Description

---|---
Language| Set the language to be displayed on the remote controller.
Temperature Unit| Set the temperature unit displayed on the remote controller.
Screen Saver Timer| Adjust the screen Off time of the remote controller.
LCD Brightness In Idle| Adjust the remote controller’s screen brightness.
Date| Set the date displayed on the remote controller.
Time| Set the time displayed on the remote controller.
Summer Time| Set the summertime in the remote controller.
Password| Set the password to prevent unauthorized change to remote controller settings.
Schedule Initialization/Schedule Reset| Initialize all timer settings in the remote controller.
Theme| Set the theme of the remote controller screen.
System Reboot| Restart the remote controller.

Language

Set the language to be displayed on the remote controller.

• In the user setting list, select the language category, and press the [OK] button to move to the detail screen.
• After the setting, if you press the [OK] button, the setting is saved and moves to the previous screen.

Temperature Unit

Set the temperature unit displayed on the remote controller.

• In the user setting list, select the temperature unit setting category, and press the [OK] button to move to the detail screen.

Fahrenheit

CAUTION
The temperature unit function may not work or work differently in some products.
You cannot set the temperature unit in the slave wired remote controller.

Screen Saver Timer

Adjust the screen Off time of the remote controller.

• Select the following setting values using the [<,>(left/right)] button.

CAUTION
Selecting a longer stand-by screen will decrease the LCD lifespan.

LCD Brightness In Idle

Adjust the remote controller’s screen brightness.

• Select the following setting values using the [<,>(left/right)] button.

Value

0 %| 10 % (default)| 20 %| 30 %

CAUTION
Selecting a brighter standby screen will decrease LCD lifespan.

Date

Set the date displayed on the remote controller.

• In the user setting list, select the date category, and press the [OK] button to move to the detail screen.
• After the setting, if you press the [OK] button, the setting is saved and moves to the previous screen.

Time

Set the time displayed on the remote controller.

• In the user setting list, select the time category, and press the [OK] button to move to the detail screen.
• After the setting, if you press the [OK] button, the setting is saved and moves to the previous screen.
• On the screen, the Time display can be presented in the form of AM / PM or 24 hours standard.

Summer Time

Set the daylight savings time dates in the remote controller.

• In the user setting list, select the summertime setting category, and press the [OK] button to move to the detail screen.
  – Summertime: The system to advance the time by 1 hour from the spring when the day is longer and return back in the fall when the day gets shorter.
  – When it becomes AM 02:00 on the DST start date, the current time changes to AM 03:00, and when it becomes AM 02:00 of the DST end date, the current time changes to AM 01:00.

Password

Set the password to prevent unauthorized change to remote controller settings.

• Select the user password setting category, and press the [OK] button to move to the detail screen.
  – If the password is set, when you enter “menu – setting”, you need to input a password to enter the set list.
  – When you forgot the password, you can initialize the password using the installer setting’s “password initialization”.
  The initialized password is “0000”.

Schedule Initialization/Schedule Reset

Initialize all timer settings in the remote controller.

• In the user setting list, select the schedule initialization setting category, and press the [OK] button to move to the detail screen.
  – Press the check button to initialize the sleep/simple timer, on/off timer, schedule an exception date in the remote controller.

NOTE
It can be different by model.

Theme

Set the theme of the remote controller screen.

• Select either white or black using the [<,>(left/right)] button.

Auto return to the main screen

Set the auto-return mode.

• Select either On or Off using the [<,>(left/right)] button.

System Reboot

Restart the remote controller.

• In the user setting list, select the system restart setting category, and press the [OK] button to move to the detail screen.
  – In the detail screen, when you press the [OK] button, a popup message is displayed, press the check button, to restart the system.
  – For forced reset, press down the [On/Off + Back] button for 5 seconds to restart the system.

OVERVIEW OWNER’S SETTINGS

Menu structure

USING THERMOSTAT

The term “thermostat”, which is widely used in this chapter, is a kind of 3rd party accessory. LG Electronics does not supply thermostats and they should be supplied, 3rd party manufacturers. Room thermostats can be used for easy and convenient control. To utilize thermostats more efficiently and correctly, this chapter presents information about using thermostats.
When the thermostat is interlocked, the subject of Thermo On / Off is limited to the thermostat.

CAUTION

• Some electro-mechanical type thermostat has internal delay time to protect the compressor. In that case, mode change can take time more than the user’s expectation. Please read the thermostat manual carefully if the product does not respond quickly.
• Setting temperature range by thermostat can be different from that of the product. The heating or cooling set temperature should be chosen within the set temperature range of the product.

How to use a thermostat

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

SERVICE SETTING

How to enter service setting

To enter the menu displayed at the bottom, you need to enter the service setting menu as follows.

• In the menu screen, press the [<,>(left/right)] button to select the setting category, and press the [OK] button to move to the setlist.
• In the setting list, select the service setting category, and press the [OK] button to move to the service setting list.

Open source license

View the remote controller’s open source license.

• In the service setting list, select the open-source license category, and press the [OK] button to move to the detail screen.

EMERGENCY OPERATION

• Definition of terms
  – Trouble: a problem that can stop system operation, and can be resumed temporally under limited operation without certificated professional’s assistance.
  – Error: a problem that can stop system operation, and can be resumed only after a certificated professional’s check.
  – Emergency mode: temporary heating operation while system met trouble.

• The objective of introducing ‘Trouble’
  – Not like an airconditioning product, an Air-to-Water heat pump is generally operated in the whole winter season without any system stopping.
  – If the system found some problem, which is not critical to the system operating for yielding heating energy, the system can temporarily continue in emergency mode operation with the end user’s decision.
  • Classified trouble
  – Trouble is classified into two levels according to the seriousness of the problem. : Slight trouble and Heavy trouble
  – Slight trouble: Sensor trouble. In most cases, 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 an 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 in the system.

• Emergency operation level
  When the AWHP has any trouble,
  (1) If there is not a function to judge the possibility of operation: Once an error occurs mainly in the indoor unit, AWHP stops. On the other hand, Remocon allows the product to activate On/ Off operation.(On emergency operation)
  – Slight / Heavy trouble: Heating Operable only
  – Critical trouble: Full stop
  – Treatment priority : Critical > Heavy > Slight
  (2) If there is a function to judge the possibility of operation: Depending on the status of slight/heavy/critical trouble, the pop-up phrase is guided separately on display.
  – Slight trouble: Heating/Cooling Operable
  – Heavy trouble: Heating Operable only
  – Critical trouble: Service center request
  – AWHP operates when the user pressed an OK button on the pop-up window.

• Duplicated trouble: Option trouble with slight or heavy trouble
  – If option trouble occurs with slight (or heavy) trouble at the same time, the system puts a higher priority on slight (or heavy) trouble and operates as if slight (or heavy) trouble occurs.
  – 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
  The water sensor and related wiring are all Ok.
  • Emergency operation is not automatically restarted after main electricity
  power is reset.
  – In normal conditions, the product operating information is restored and automatically restarted
  after the main electricity power is reset.
  – But in an emergency operation, automatic re-start is prohibited to protect the product.
  – Therefore, the user must restart the product after a power reset when the emergency operation has been running.

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 a long time, we strongly recommend not to switch off the power supply to the product.
• When the power is applied for the first time, operate the product after preheating for 2 hours. To protect the unit by increasing the oil temperature of the compressor.
• If power is not supplied, some special product-protecting actions (such as water pump anti-locking) will not be performed.

How to drain the remaining water in the product

CAUTION
If the product is not used for a long period of time with remaining water, there is a risk of freezing in winter.

Step1. To drain most of the water out of the product, remove the water pipes from the inlet/outlet valve(①, ②). After draining, reconnect them

Step2. To drain the rest of the water out of the product, open the cock(③) of the drain valve(④) counterclockwise. After draining, lock it in the opposite direction to the end.

– To use the product again, you have to refill water in it. Refer to ‘Water Charging’ of the ‘Installation’  part in the installation manual.

Call the service immediately in the following situations

• Anything abnormal such as burning smell, loud noise, etc. happens. Stop the unit and turn the breaker off. Never try to repair by yourself or restart the system in such cases.
• The main power cord is too hot or damaged.
• Error code is generated by self-diagnosis.
• Water leaks from the unit.
• Any switch, breaker (safety, earth), or fuse fails to work properly.

User must carry out routine checkups & cleaning to avoid unit’s poor performance.
In case of a 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 the 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 the dealer, seller, or an authorized service center.

Eco-design requirement
– The information for Ecodesign is available on the following free access website. https://www.lg.com/global/support/cedoc/cedoc
[Representative] LG Electronics Inc. Single Point of Contact (EU/UK) & EU Importer :
LG Electronics European Shared Service Center B.V. Krijgsman 1, 1186 DM
Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,
Changwon-si, Gyeongsangnam-do, KOREA
[THE U.K. Importer] LG Electronics U.K. Ltd Velocity 2, Brooklands Drive, Weybridge, KT13 0SL

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