LG MFL67040414 Floor Standing Air Conditioner Instruction Manual

MFL67040414 Floor Standing Air Conditioner

Product Information

The LG Air Conditioner is a floor standing unit that requires proper installation and wiring to function efficiently. The product manual must be read thoroughly before installing the product. The manual provides important safety instructions and guidelines for energy-saving. It also contains detailed information on the installation process, including selecting the best location, indoor unit installation, wiring connection, and leakage test and evacuation.

Product Usage Instructions

Before using the LG Air Conditioner, read all instructions and comply with the following precautions to avoid dangerous situations and ensure peak performance of your product:

Installation

The installation work must be performed in accordance with the national wiring standards by authorized personnel only. Select the best location for the indoor unit, ensuring no heat source or steam near the unit, no obstacles to prevent air circulation, good air circulation in the room, easy drainage, noise prevention, and no installation near the doorway. The indoor unit must keep the maintenance space.

Operation

Use the following tips for saving energy:

• Minimize power consumption by using the air conditioner efficiently.
• Do not obstruct air flow or weaken the cooling/dehumidifying functions.

The product manual provides convenient functions such as child lock operation function, auto dry function, desired airflow direction memory function, auto restart operation, installer setting-group setting, and indoor unit airflow variable setup function.

After installing the LG Air Conditioner, enjoy cool and comfortable temperatures with efficient energy usage by following the product usage instructions and safety precautions.

TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below:

• Do not cool excessively indoors. This may be harmful for your health and may consume more electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors and windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the air flow or weaken the cooling / dehumidifying functions.

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 :

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product.

WARNING
It can result in serious injury or death when the directions are ignored.

CAUTION
It can result in minor injury or product damage when the directions are ignored.

WARNING

• Installation or repairs by unqualified persons can result in hazards to you and others.
• The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

Installation

• Always perform grounding.
  • Otherwise, it may cause electric shock.
• Don’t use an electric cable or a terminal block which is damaged.
  • Otherwise, it may cause a fire or electric shock.
• For installation of the product, always contact the service center or a professional installation agency.
  • Otherwise, it may cause a fire, electric shock, explosion or injury.
• Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor unit.
  • If the electrical part cover of the indoor unit and the service panel of the outdoor unit are not attached securely, it could result in a fire or electric shock due to dust, water, etc.
• Always install an earth leakage breaker and a dedicated switching board.
  • No installation may cause a fire and electric shock.
• Do not keep or use flammable gases or combustibles near the air conditioner.
  • Otherwise, it may cause a fire or the failure of product.
• Ensure that an installation frame of the outdoor unit is not damaged due to use for a long time.
  • It may cause injury or an accident.
• Do not disassemble or repair the product randomly.
  • It will cause a fire or electric shock.
• Do not install the product at a place that there is concern of falling down.
  • Otherwise, it may result in personal injury.
• Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are removed or opened.
  • Otherwise, it may cause fire, electric shock, explosion or death.

Operation

• Do not share the outlet with other appliances.
  • It will cause an electric shock or a fire due to heat generation.
• Do not use the damaged electric cable.
  • Otherwise, it may cause a fire or electric shock.
• Do not modify or extend the electric cable randomly.
  • Otherwise, it may cause a fire or electric shock.
• Turn off the breaker or power if strange sounds, smell, or smoke comes from it.
  • Otherwise, it may cause electric shock or a fire.
• Keep the flames away.
  • Otherwise, it may cause a fire.
• Do not use the electric cable near the heating tools.
  • Otherwise, it may cause a fire and electric shock.
• Do not open the suction inlet of the indoor/outdoor unit during operation.
  • Otherwise, it may electric shock and failure.
• Do not allow water to run into electrical parts.
  • Otherwise, it may cause the failure of machine or electric shock.
• Hold the plug by the head when taking it out.
  • It may cause electric shock and damage.
• Never touch the metal parts of the unit when removing the filter.
  • They are sharp and may cause injury.
• Do not step on the indoor/outdoor unit and do not put anything on it.
  • It may cause an injury through dropping of the unit or falling down.
• Do not place a heavy object on the electric cable.
  • Otherwise, it may cause a fire or electric shock.
• When the product is submerged into water, always contact the service center.
  • Otherwise, it may cause a fire or electric shock.
• Take care so that children may not step on the outdoor unit.
  • Otherwise, children may be seriously injured due to falling down.

CAUTION

• Install the drain hose to ensure that drain can be securely done.
  • Otherwise, it may cause water leakage.
• Install the product so that the noise or hot wind from the outdoor unit may not cause any damage to the neighbors.
  • Otherwise, it may cause dispute with the neighbors.
• Always inspect gas leakage after the installation and repair of product.
  • Otherwise, it may cause the failure of product.
• Keep level parallel in installing the product.
  • Otherwise, it may cause vibration or water leakage.
• For installation of the product, do not use the pipe less than 5m
  • Otherwise, it may cause damage of compressor and to form dewdrop on the indoor unit.
  • Also, it may cause to decrease capacity.
• Use caution when unpacking and installing.
  • Sharp edges may cause injury.
• Do not install the unit in potentially explosive atmospheres.

Operation

• Avoid excessive cooling and perform ventilation sometimes.
  • Otherwise, it may do harm to your health.
• Use a soft cloth to clean. Do not use wax, thinner, or a strong detergent.
  • The appearance of the air conditioner may deteriorate, change color, or develop surface flaws.
• Do not use an appliance for special purposes such as preserving animals vegetables, precision machine, or art articles.
  • Otherwise, it may damage your properties.
• Do not place obstacles around the flow inlet or outlet.
  • Otherwise, it may cause the failure of appliance or an accident.

INSTALLATION PLACE

Select the best Location

Indoor unit

• There should not be any heat source or steam near the unit.
• There should not be any obstacles to prevent the air circulation.
• A place where air circulation in the room will be good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.
• The indoor unit must keep the maintenance space.

Indoor unit installation

1. The mounting floor should be strong and solid enough to prevent it from vibration.
2. Drill the piping hole with 65 mm diameter hole-core drill at either the right or the left of indoor unit. The hole should be slightly slant to the outdoor side.
3. Insert the plastic tube through the hole.
4. Cut the extruded outside part of the plastic tube, if necessary.

• When using knock-out hole to route the piping, insert the plastic cover in knock-out hole in order to prevent the piping from damaged by sharp edge of the hole.

CAUTION: Pipes and wires should be purchased separately for installation of the product.

Precautions in bending

1. If it is necessary to bend or stretch the tubing, use the spring which is attached to the tubing instead of pipe bender.
   • Please make a careful notice to make a smooth line.
   • Hold the tubing with your two hands closely and then bend or stretch it slowly not to make any crack.
   • Remember that the radius (R) should exceed 70 mm (Refer to Fig. 1).
2. Do not repeat the bending process to prevent the tubing from cracking or crushing.
3. Keep in mind that the bending part should not be cracked and make the radius (R) as long as possible (Refer to Fig. 2).

WIRING CONNECTION

Connecting the cable

Indoor unit
* The inside and outside connecting cable can be connected after opening the inlet grille.

1. Open the inlet grille manually.

2. Open the control cover with screwdriver(⊕).

3. Connect the cables to the terminal block(①) in the control box.
   And fix the cable to cord clamp(②). Close the plastic cover of terminal block(①).

4. Secure the control cover to the original position with the screw(③).

5. Close the inlet grille.

LEAKAGE TEST AND EVACUATION
Vacuum drying of the connecting pipes and the indoor unit
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor.

1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below 0.8 Torr by the vacuum pump.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve. 7 Disconnect the charge hose and fit the nut to the service port.
   (Tightening torque: 1.8 kgf·m)

Pipes and wires should be purchased separately for installation of the product.

FINAL CHECK AND TEST RUN

A test run allows you to check if the product has been properly installed before operating the product.
Hold down the Power button and Temp. down button on the indoor unit simultaneously for 3 seconds. “Lo” appears on the display screen, and the product performs a test run for 18 minutes.

Final check points during Test Run

1. Is the unit securely mounted?
2. Is the installation location adequate?3 Does the water piping work adequately and without leakage?
3. Are trapped drain lines installed at condensate drain connections?
4. Has the refrigeration cooling cycle been kept sealed?
5. Is the electrical wiring adequate and are the screws tightened on terminals?
6. Does the remote control work properly?8 Does the display on the indoor unit work properly?
7. Do you hear any abnormal noises?
8. Does the heating/cooling work properly?11 Does the water drain properly?

CONVENIENT FUNCTIONS
Child Lock Operation Function

1. Press the fan speed button and high temperature setting buttons simultaneously for 3 seconds. Or press the X button on remote control.

2. During child lock operation,

   • Whenever you press any button on display panel, it will immediately display “CL”, which means display panel is locked.
   • All the button on the indoor unit display panel will not work.
   • But the button on the remote controller will be operated.

3. Press the fan speed button and high temperature setting buttons simultaneously for 3 seconds again. The unit will respond with beep. child lock operation will removed.
   NOTE

   • Remote control functions may differ depending on the model accordingly.

Auto Dry Function

1. Auto dry function can be settled/released by manipulating indoor unit button or remote control.
2. When pressing the  button after setting the function, evaporator in indoor unit will be automatically dried as showing counting 00 to 99 on its display panel.
3. After indicating 99 on the display panel, the unit will be automatically turned off.

• Auto dry function is released at initial state as standard.

For Setting Auto Dry Function
If manipulating indoor unit, press the button and button simultaneously for 3 MODE seconds.
If manipulating remote control for Cooling Only model, press button.
The indoor unit will respond with beep once and indicate “SC” on its display panel. Then Auto dry function will be set.

For Releasing Auto Dry Function

If manipulating indoor unit, press the button and button simultaneously for 3 MODE seconds.
If manipulating remote control for Cooling Only model, press button.
The indoor unit will respond with beep twice and Auto dry function will be removed.

Desired airflow direction memory function