LG LS090HEV1 - User Manual

Other manuals for LG LS090HEV1

Installation Manual76 pages

Engineering Manual68 pages

Questions and Answers

J
jessica88Sep 19, 2025
What does it mean when my LG LS090HEV1 says the outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out?
- L
  Lindsey CrossSep 22, 2025
  If your LG Air Conditioner displays an error indicating that the outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out, contact LG Support. You can also try turning the air conditioner off and on again to see if that fixes the problem.
M
mmasseyAug 25, 2025
What to do if LG Air Conditioner does not generate cool air?
- S
  Steven LewisAug 25, 2025
  If your LG air conditioner isn't generating cool air, consider the following: * Ensure that curtains, blinds, or furniture aren't blocking the front of the unit, as this can impede air circulation. * Clean the air filter every 2 weeks. * If the room temperature is too high, especially in summer, select jet cool operation to cool the room quickly. * Make sure cold air isn't escaping through ventilation points. * Set the desired temperature lower than the current room temperature. * Avoid using heat sources like ovens or gas burners while the air conditioner is running. * Ensure the air conditioner is not in air circulation mode; switch to cooling mode. * If the outside temperature is too high, the air conditioner's cooling capacity may be insufficient.
C
cboothAug 25, 2025
Why LG Air Conditioner does not generate warm air?
- C
  charlesloweAug 26, 2025
  If your LG air conditioner isn't generating warm air, it could be due to these reasons: * When heating mode is first started, the unit prepares warm air as part of its normal operation. * The outdoor unit might be in defrost mode, which removes frost from the coil when the outside temperature is low. Wait approximately 15 minutes for this operation to complete.
L
Lisa KnappAug 27, 2025
What to do if my LG Air Conditioner stops during operation?
- T
  Thomas HillAug 27, 2025
  If your LG air conditioner stops during operation, check the following: * Verify if the timer function has been set to turn off the unit at a specific time and adjust the timer settings as needed. * If a power failure occurred during operation, the system might be rebooting with the auto restart default setting. If power failures are frequent, ensure the system is set to auto restart for quick power up.
N
Natasha WileySep 23, 2025
What does it mean if the condenser coil pipe thermistor temperature is too low in my LG Air Conditioner?
- J
  Jerry WelchSep 23, 2025
  If your LG Air Conditioner displays an error indicating that the condenser coil pipe thermistor temperature is too low, contact LG Support. You can also try turning the air conditioner off and on again to see if that fixes the problem.
S
Scott NelsonSep 23, 2025
What does it mean if the heat sink thermistor has disconnected or has shorted out in my LG LS090HEV1?
- C
  Charles NicholsSep 23, 2025
  If your LG Air Conditioner displays an error indicating that the heat sink thermistor has disconnected or has shorted out, contact LG Support. You can also try turning the air conditioner off and on again to see if that fixes the problem.
J
Jamie DawsonSep 10, 2025
What does it mean when my LG LS090HEV1 Air Conditioner says the current-to-current transformer (CT) thermistor is too low?
- E
  emily65Sep 10, 2025
  If your LG Air Conditioner displays an error indicating that the current-to-current transformer (CT) thermistor is too low, contact LG Support. You can also try turning the air conditioner off and on again to see if that fixes the problem.
S
Stephanie PattersonSep 12, 2025
What does Inverter Compressor Discharge Pipe (D-Pipe) Overheat mean on my LG LS090HEV1 Air Conditioner and how can I fix it?
- L
  lisadudleySep 12, 2025
  If your LG Air Conditioner displays an error indicating Inverter Compressor Discharge Pipe (D-Pipe) Overheat, contact LG Support. You can also try turning the air conditioner off and on again to see if that fixes the problem.
D
Destiny BakerSep 3, 2025
What does DC Peak (IPM Fault) mean on my LG LS090HEV1 and how can I fix it?
- D
  Darren Hartman PhDSep 4, 2025
  If your LG Air Conditioner displays a DC Peak (IPM Fault) error indicating that the compressor DC voltage was too high, contact LG Support. You can also try power cycling the unit by turning it off and then back on.
K
Kristen ParrishSep 1, 2025
What to do if there is a communication failure from outdoor unit to indoor unit in my LG LS090HEV1?
- M
  Michael CastanedaSep 1, 2025
  If your LG Air Conditioner displays a communication failure from the outdoor unit to the indoor unit, please contact LG Support. You might also try turning the unit off and then back on to see if that resolves the problem.

Summary

Safety Instructions

General Safety

General safety precautions for installation and usage.

Power and Electrical Safety

Safety measures related to electrical connections and power usage.

Installation Safety

Precautions to take during the installation process.

Usage

Guidelines for safe and proper product usage.

Basic Functions

Cooling Operation

How to operate the unit in cooling mode.

Heating Operation

How to operate the unit in heating mode.

Timer Settings

Programming the unit for automatic on/off times and sleep mode.

Maintenance

Indoor Unit - Cleaning Intervals

Cleaning the Air Filter

Step-by-step guide for cleaning the air filter.

This document is an owner's manual for LG Single Zone Mega and Mega 115V Wall Mounted air conditioning systems. It provides comprehensive information on the device's functions, usage, and maintenance.

Function Description:

The LG Single Zone Mega and Mega 115V Wall Mounted systems are air conditioning units designed for single-zone applications. They offer various operational modes including cooling, heating, dehumidifying, and air circulation. The systems are controlled via a remote controller, which allows users to adjust temperature, fan speed, and air flow direction, as well as set timers for automatic operation. Some models feature "Jet Cool" and "Jet Heat" operations for rapid temperature changes, "Auto Changeover" to automatically maintain a set temperature, and an "Energy Saving" mode to minimize power consumption during cooling. The units also include an "Auto Clean" function for indoor air purification and a "Self-diagnosis" function to alert users to potential issues.

Important Technical Specifications:

The manual lists several models for both Single Zone Mega and Mega 115V systems, including:

Single Zone Mega:
- Outdoor Units: LSU090HEV1, LSU120HEV1, LSU180HEV1, LSU240HEV1
- Indoor Units: LSN090HEV1, LSN120HEV1, LSN180HEV1, LSN240HEV1
- Controller: AKB73835318
Single Zone Mega 115V:
- Outdoor Units: LSU090HXV, LSU120HXV
- Indoor Units: LSN090HXV, LSN120HXV
- Controller: AKB73456121

The cooling temperature range is 64 °F (18 °C) - 86 °F (30 °C). For heating, the temperature range is 60.8 °F (16 °C) - 86 °F (30 °C). In sleep mode, the temperature increases by 1.8 °F (1 °C) after 30 minutes and an additional 1.8 °F (1 °C) after another 30 minutes, for a total increase of up to 3.6 °F (2 °C) from the present temperature. The auto changeover function maintains a set temperature within ± 3.6 °F (± 2 °C). The remote controller uses AAA (1.5V) batteries.

Usage Features:

Remote Controller Operation: The manual details the functions of various buttons on the remote controller, including On/Off, Temperature Adjustment, Operation Mode Selection (Cooling, Auto, Dehumidifying, Heating), Fan Speed, Surge (rapid heating/cooling), Air Flow Direction (Swing), Room Temperature Display (°C/°F toggle), Sleep Mode Auto, and 1 Touch Soft Air (deflects supply air).
Timer Settings: Users can program the unit to turn on and off automatically at set times, which helps save energy. The "Sleep Mode Auto" feature allows setting a countdown timer for up to 7 hours before the unit automatically turns off.
Air Flow Adjustment: The "Swing" buttons allow users to adjust the vertical and horizontal air flow directions. The "1 Touch Soft Air" button sets the vane to a preset position to deflect air away from occupants.
Manual Operation: In case the remote control is unavailable, the unit can be operated manually using the On/Off button located on the indoor unit. When operating manually, the fan speed is automatically set to high.
Auto Restart: The unit can be programmed to automatically restart with previous settings after a power failure. This is a factory default setting but can be disabled or re-enabled.
Temperature Display: The system can display temperature in either Celsius (°C) or Fahrenheit (°F).

Maintenance Features:

Cleaning Intervals: Regular cleaning is recommended to maintain optimal performance.
- Air Filter: Should be cleaned every 2 weeks or more often if necessary. Cleaning involves removing the filter, washing it with a vacuum cleaner or warm water (with detergent if needed), drying it completely, and re-installing. Water hotter than 104 °F (40 °C) should not be used.
- Indoor Unit Surface: Should be cleaned regularly with a soft dry cloth. Bleach or abrasives should not be used.
- Outdoor Unit: Heat exchanger coils and panel vents should be cleaned regularly using steam. For proper outdoor unit care, consulting a technician is recommended.
Battery Replacement: Batteries in the remote controller should be replaced when the display screen starts to fade. When batteries are removed, the temperature unit resets to Celsius as the default.
General Safety: The manual emphasizes the importance of turning off power and unplugging the cord before performing any maintenance to avoid electric shock. It also warns against using strong cleaning agents or solvents.