LG THERMA V - User Manual

Other manuals for LG THERMA V

Installation Manual277 pages

Questions and Answers

I
irobertsonSep 8, 2025
What to do if my LG Air Conditioner has exceeded high pressure in DHW mode?
- A
  Andrea GriffinSep 8, 2025
  If your LG Air Conditioner shows an 'Exceeded High Pressure' error in DHW mode, the issue is likely insufficient water flow through the condenser. You can try the following: 1. Check the heating system to ensure the circulation pump is working and that all valves and flaps are correctly opened or closed. 2. Clean the strainer if it is blocked. 3. Fill the system to the correct pressure (min. 1.5–2 bar). 4. Vent the system.
H
Heather HarmonAug 23, 2025
Why is my LG THERMA V heating or cooling not satisfactory?
- D
  Donna BeltranAug 23, 2025
  Unsatisfactory heating or cooling from your LG Heat Pump can stem from several causes. First, verify that the target temperature is set correctly, paying attention to whether the temperature setting is water-based or air-based. Another potential cause is insufficient charged water; in this case, check the pressure gauge and add water until it reads between 2 and 2.5 Bar. Lastly, a low water flow rate could be the culprit. Examine the strainer for excessive particle buildup and clean it if necessary. Also, check if the pressure gauge indicates above 4 Bar, and inspect the water pipe for blockages due to stacked particles or lime.
J
Joseph WeeksAug 25, 2025
How to troubleshoot unsatisfactory heating or cooling in my LG THERMA V?
- J
  johnchambersAug 25, 2025
  If your LG Heat Pump's heating or cooling isn't working well, it could be due to a few reasons. First, make sure the target temperature is set correctly, paying attention to whether it should be water-based or air-based. Also, ensure that the charged water is sufficient by checking the pressure gauge and adding water until it reads 2~2.5 Bar. Finally, check the water flow rate, ensuring the strainer isn't clogged and the pressure gauge isn't above 4 Bar. Also, inspect the water pipe for any obstructions from particles or lime.
J
Justin SmallAug 26, 2025
What to do if my LG THERMA V Heat Pump doesn't start, even with power?
- D
  Dawn ThompsonAug 27, 2025
  If your LG Heat Pump isn't starting even though the power supply is fine, the water inlet temperature might be the issue. If it's above 57 °C, the unit won't start to protect the system. Similarly, in cooling mode, the unit won't operate if the water inlet temperature is below 5 °C. In heating mode, the unit won't operate if the water inlet temperature is below 15 °C. In these cases, wait for the unit to adjust the water inlet temperature. If you're not using a back-up heater, consider increasing the water temperature with an external heat source. If problems persist, it is recommended to contact your dealer.
M
matthew26Aug 27, 2025
What to do if my LG Heat Pump unit doesn't start, even though the remote controller displays information?
- T
  Theresa WheelerAug 28, 2025
  If your LG Heat Pump isn't starting despite the remote controller displaying information, one potential cause is the water inlet temperature. The unit won't operate if the water inlet temperature is above 57°C to protect the system. Alternatively, the water inlet temperature might be too low. If it's below 5°C during cooling, or below 15°C during heating, the unit will not operate. In these cases, allow the unit to warm up the water inlet temperature. If you are not using the back up heater accessory (HA**1M E1), increase the water temperature with the external heat source (heater, boiler).
M
Michael ChandlerSep 22, 2025
What to do if water floods out through the drain hose of my LG THERMA V Heat Pump?
- T
  Trevor MooreSep 22, 2025
  If water is flooding out through the drain hose of your LG Heat Pump, it could be due to two main reasons. The first is that too much water has been charged. To fix this, release water by opening the switch of the safety valve until the pressure gauge indicates between 2 and 2.5 Bar. The other potential cause is a damaged expansion tank. If this is the case, the expansion tank needs to be replaced.
D
Daniel ShawSep 16, 2025
What causes exceeded low pressure in DHW mode on my LG Air Conditioner and how can I fix it?
- N
  ninajenkinsSep 16, 2025
  If your LG Air Conditioner shows an 'Exceeded Low Pressure' error in DHW mode, it's likely due to insufficient air flow through the evaporator. To fix this: 1. Check the operation of the fan on the heat pump. 2. Ensure unobstructed air flow through the evaporator.
E
Elizabeth JosephSep 18, 2025
What does it mean if there is an error on the frequency oscillator on the PLC of my LG Air Conditioner?
- A
  Alexander McbrideSep 18, 2025
  If there is an error on the frequency oscillator on the PLC of your LG Air Conditioner, it indicates that the frequency oscillator on the HP electronics is damaged. You can try the following: 1. Reset the error by pressing and holding the ENTER button for 3 seconds. 2. If the reset doesn't fix the error, contact an authorized service.
K
Kimberly AlexanderSep 7, 2025
What to do if my LG Air Conditioner has exceeded high pressure in space heating mode?
- G
  Gregory MooreSep 7, 2025
  If your LG Air Conditioner displays an 'Exceeded High Pressure' error in space heating mode, it's likely due to insufficient water flow through the condenser. Here are the steps you can take to address this: 1. Check the heating system to ensure the circulation pump is working and that all valves and flaps are correctly opened or closed. 2. Clean the strainer if it is blocked. 3. Fill the system to the correct pressure (min. 1.5–2 bar). 4. Vent the system.
C
christopher03Sep 4, 2025
How to troubleshoot insufficient water flow in LG Air Conditioner's heating system?
- A
  Alexander RangelSep 4, 2025
  If there is insufficient flow of water between your LG Air Conditioner and the heating system, it might be due to insufficient water flow through the condenser or evaporator. To resolve this: 1. Check the heating system to ensure the circulation pump is working and all valves and flaps are correctly opened/closed. 2. Clean the strainer. 3. Fill the system to the correct pressure (1.5–2 bar). 4. Vent the system.

Summary

Safety Precautions and Warnings

Understanding Safety Symbols

Defines the meaning of WARNING and CAUTION symbols used in the manual.

General Electrical Safety Guidelines

Covers grounding, circuit breakers, multi-outlets, and wiring safety for electrical connections.

Safety Precautions: Hazard Avoidance

Water and Electrical Hazard Warnings

Details risks associated with water contact and electrical components.

Product Handling and Environmental Safety

Safety Precautions: Installation and Operation

Installation, Refrigerant, and Operational Safety

TERMOTRONIC Controller Overview

Controller Interface and Button Functions

TERMOTRONIC Controller Operation

Device Activation and Standby Status

Device Operation and Status Display

TERMOTRONIC Controller States

TERMOTRONIC Controller Information

TERMOTRONIC Controller Settings

Step-by-Step Parameter Adjustment

Detailed instructions for adjusting various device parameters via the controller.

Quick Settings for User Adjustments

Setting Room and Water Temperatures

Guides on adjusting room temperature and heating/cooling water temperature.

Quick Settings for Room Comfort

Room Temperature Control (KT-1)

Quick Settings for Heating and Water

Heated Water Temperature Control

How to adjust heated water temperature using the Heating curve mode.

Quick Settings for Heated Water Adjustment

Adjusting Heated Water Temperature (C;W)

Step-by-step process to modify heated water temperature using the C/W parameter.

Quick Settings for Water Control Modes

Quick Settings for Domestic Hot Water

Domestic Hot Water (DHW) Temperature Settings

Instructions for setting the desired temperature for domestic hot water.

Quick Settings for Operational Modes

Winter;Summer Mode Selection

How to choose between winter and summer operating modes.

Quick Settings for Mode Changes

Changing Operating Mode (Manual)

Step-by-step guide for manual switching between Winter, Summer, and AUTO modes.

Quick Settings for Cooling Configuration

Setting Cooling Temperatures

Adjusting cold water temperature for cooling circuits.

Quick Settings for Auxiliary Heat Source

Auxiliary Heat Source Activation

How to activate the backup source to supplement heating power.

Quick Settings for Backup Heat Source

Manual Auxiliary Power Source Activation

Detailed steps for manually turning on the backup heat source.

Quick Settings for Backup Source Operation

Backup Source Operation Modes

Advanced Heating Settings

Heating System Configuration Notes

General notes and considerations for setting up the heating system.

Heating Water Control Modes

Explains Heating Curve and Constant modes for water temperature control.

Advanced Heating Control Settings

Switching Heating Control Modes

Steps to transition heating control from weather curve to constant temperature.

Advanced Weather Controlled Heating Settings

Weather Controlled Heating Explained

How the system adjusts water temperature based on external air conditions.

Advanced Heated Water Temperature Settings

Setting Temperature Correction

Adjusting heated water temperature for comfort during transitional weather periods.

Advanced Maximum Heated Water Temperature Settings

Adjusting Maximum Heated Water Temperature (Normal Parameter)

How to set the 'Normal' parameter for maximum heated water temperature.

Advanced Constant Temperature Heating Settings

Heating with Constant Temperature

Setting Constant Heated Water Temperature

Configuring the 'Normal' parameter for constant water temperature.

User Menus and Parameters Guide

Heating Parameters Explained

User Menus and Parameters - Cooling and Circuits

Cooling Parameters Explained

Circuit-Specific Parameters

User Menus and Parameters - DHW Settings

Domestic Hot Water (DHW) Parameters

User Menus and Parameters - Alternative Source

Alternative Source Integration Parameters

User Menus and Parameters - Backup and Modes

Backup Source and Mode Settings

User Menus and Parameters - Special Functions

Screed Drying and System Operation Parameters

User Menus and Parameters - Sensor Data

Diagnostic Displays and Procedures

Accessing Diagnostic Displays

Disruptions, Alarms, and Troubleshooting

Device Protection Mechanisms

Disruptions, Alarms, and Troubleshooting (Continued)

Normal Operation Errors and Alarms

Specific error codes and descriptions occurring during normal device operation.

Backup Operation Errors and Alarms

Error codes and descriptions relevant to backup operational modes.

Troubleshooting Air-Water Device Errors

Troubleshooting Pressure and Flow Errors

Procedures for resolving errors related to high/low pressure and insufficient flow.

Troubleshooting Electrical and Sensor Issues

Troubleshooting Electrical and Sensor Errors

Steps to resolve issues with electrical supply, sensors, and temperature differences.

Troubleshooting Specific Alarms

Procedures for addressing alarms like defrost, DHW heating, and efficiency warnings.

Maintenance and Service Recommendations

Recommended Maintenance Activities

Critical Service Situations

Critical situations requiring immediate professional service intervention.

Settings for Heating System at Start-up

Heating Mode Settings Recording

Cooling Mode Settings Recording

Settings for Heating System at Start-up (Continued)

Domestic Hot Water (DHW) Settings Recording

LG THERMA V Specifications

General

Type	Air-to-Water Heat Pump
Refrigerant	R32
Operating Temperature Range (Heating)	-25°C to 35°C
Power Supply	220-240V, 50Hz
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Noise Level (Indoor Unit)	20 - 45 dB(A)
Noise Level (Outdoor Unit)	45 - 60 dB(A)