What is the LG Therma V R32 Gen3?

The LG Therma V R32 Gen3 is a monobloc air-source heat pump range available in 5kW to 16kW capacities with a maximum flow temperature of 65°C. It is designed for domestic heating and hot water, utilizing R32 refrigerant and featuring integrated weather compensation for optimized efficiency.

How do I register a LG THERMA_V_R32_Gen3_Installation_Guide with BoilerTag?

Scan the QR code on the BoilerTag sticker after installation to begin the process. Confirm the model details, which will pre-fill from the appliance catalogue, and record the installation date along with your gas safe or engineer ID number. Every future service log becomes a permanent, publicly viewable record for the property. The first 12 BoilerTag stickers are provided free for engineers to help establish digital service histories. Order free BoilerTag stickers from the engineer dashboard.

What causes flow rate alarms in the first two weeks?

Flow rate alarms are likely to occur during the first two weeks after commissioning due to the formation of air-pockets which may temporarily affect the flow-rate. In most cases, the air will migrate to the auto-airvents (AAV) and release without any requirement for intervention.

What happens if sediments are in the hydronic pipework?

Sediments in the hydronic pipework will be caught by the internal strainer, which can lead to CH14 flow rate alarms. If blockages occur, the strainers must be cleaned to restore proper flow.

What is the maximum flow temperature of the LG Therma V R32 Gen3?

65°C is the maximum flow temperature. This high-temperature capability allows the unit to be used in retrofit scenarios where existing radiators are retained, provided they are sized correctly for the heat pump's output at lower ambient temperatures.

What is the minimum outdoor operating temperature for this LG heat pump?

-25°C is the minimum outdoor operating temperature. The unit is designed to provide heating even in extreme winter conditions, though efficiency and capacity will vary based on the specific ambient temperature and flow requirements.

What size pipework is required for the LG Therma V R32 Gen3?

22mm is the required pipe size for the hydraulic connections. Maintaining this diameter is essential to ensure the system meets the minimum required water flow rate of 14.37 litres per minute for stable operation.

What does fault code 14 mean on an LG Therma V?

Fault code 14 indicates a problem with the flow switch. This occurs if the flow switch is open while the pump is running, or closed while the pump is stopped. It often points to air in the system or a mechanical failure of the switch itself.

Does the LG Therma V R32 Gen3 require a buffer tank?

Yes, a buffer tank is required according to the installation specifications. This ensures there is sufficient water volume in the system to facilitate successful defrost cycles and prevent short-cycling of the inverter compressor.

Is the LG Therma V R32 Gen3 Smart Grid ready?

Yes, the unit is Smart Grid ready. This allows the heat pump to communicate with external energy management systems to shift electrical load based on grid demand or variable electricity tariffs.

What refrigerant does the LG Therma V R32 Gen3 use?

R32 refrigerant is used in this model. R32 has a lower Global Warming Potential (GWP) than the R410A refrigerant used in older systems, making it a more environmentally friendly choice for domestic heating.

What is the MCB rating for the LG Therma V R32 Gen3?

16A is the specified MCB rating for the standard 230V single-phase models. Installers must ensure the electrical supply and circuit protection meet this requirement as per the manufacturer's installation guide.

What does fault code 1 mean on the LG 5kW 1-Phase?

Problem in remote room air sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 10 kO at 25 centigrade (unplugged) -+ for Remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)\nRefer resistance-tempe…

What does fault code 2 mean on the LG 5kW 1-Phase?

Problem in refrigerant (inlet side) sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensor…

What does fault code 6 mean on the LG 5kW 1-Phase?

Problem in refrigerant (outlet side) sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all senso…

What does fault code 8 mean on the LG 5kW 1-Phase?

Problem in water tank sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 13 mean on the LG 5kW 1-Phase?

Problem in solar pipe sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 16 mean on the LG 5kW 1-Phase?

Problems in sensors Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 17 mean on the LG 5kW 1-Phase?

Problem in water-inlet sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 18 mean on the LG 5kW 1-Phase?

Problem in water-outlet sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 19 mean on the LG 5kW 1-Phase?

Problem in electric heater outlet sensor Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

What does fault code 10 mean on the LG 5kW 1-Phase?

BLOC Water pump Lock Likely causes: Restriction of BLOC Water pump. BLOC Water pump defect/ assembly condition abnormal\nFan lock by foreign material

What does fault code 3 mean on the LG 5kW 1-Phase?

Bad communication between remote controller and unit. Likely causes: Incorrect connection between sensor and PCB(Heater); PCB(Heater) fault; Sensor fault. Wire connection between remote controller and Main PCB assembly(Heater) should be tight\nOutput voltage of PCB should be 12 V DC

What does fault code 5 mean on the LG 5kW 1-Phase?

Bad communication between Main PCB assembly(Heater) and Main PCB assembly(lnverter) of the unit. Likely causes: The connector for transmission is disconnected; The connecting wires are misconnected; The communication line is broken; Main PCB assembly(lnverter) is abnormal; Main PCB assembly(Heater)…

What does fault code 53 mean on the LG 5kW 1-Phase?

Bad communication between Main PCB assembly(Heater) and Main PCB assembly(lnverter) of the unit. Likely causes: The connector for transmission is disconnected; The connecting wires are misconnected; The communication line is broken; Main PCB assembly(lnverter) is abnormal; Main PCB assembly(Heater)…

What does fault code 9 mean on the LG 5kW 1-Phase?

PCB program (EEPROM) fault Likely causes: Electrical or mechanical damage a the EEPROM. This error can not be permitted

What does fault code 14 mean on the LG 5kW 1-Phase?

Problem in flow switch Likely causes: Flow switch is open while internal water pump is working; Flow switch is closed while internal water pump is not working; Flow switch is open while DIP switch No. 5 of Main PCB assembly(Heater) is set as on. Flow switch should be closed while internal water pum…

What does fault code 15 mean on the LG 5kW 1-Phase?

Water pipe overheated Likely causes: Abnormal operation of electric heater; Leaving water temperature is above 72 °C.. If there is no problem in electric heater control, possible maximum leaving water temperature is 72 °C

What does fault code 20 mean on the LG 5kW 1-Phase?

Thermal fuse is damaged Likely causes: Thermal fuse is cut off by abnormal overheating of internalelectric heater; Mechanical fault at thermal fuse; Wire is damaged. This error will not be happened if temperature of electric heater tank is below 80 °C

What does fault code 21 mean on the LG 5kW 1-Phase?

DC PEAK (1PM Fault) Likely causes: Instant over current; Over Rated current; Poor insulation of 1PM. An instant over current in the U,V,W phase\nComp lock\nThe abnormal connection of U,V,W\nOver load condition\nOvercharging of refrigerant Pipe length. Outdoor Fan is stop\nPoor insulation of compres…

LG Therma V R32 Gen3 — Specs, Faults & Install Guide

Engineer's overview

The LG Therma V R32 Gen3 Typical Installation with Third Party controls represents a versatile monobloc air-source solution for the UK market. This inverter-driven range spans from 5kW to 16kW nominal outputs, catering to various property sizes and heat loss requirements. The system is engineered to operate in extreme conditions, maintaining functionality down to a minimum outdoor temperature of -25°C. For high-temperature applications, the unit achieves a maximum flow temperature of 65°C, making it suitable for both underfloor heating and appropriately sized radiator circuits.

Hydraulic integration requires careful attention to flow rates. The manufacturer specifies a minimum water flow rate of 14.37 litres per minute to ensure stable operation. Installers must utilize 22mm pipework for the primary connections and include a buffer tank as part of the system design to maintain the necessary volume for defrost cycles. The electrical configuration typically requires a 230V supply with a 16A MCB rating for the smaller units, though 3-phase variants are available for the 12kW, 14kW, and 16kW models.

Control logic is a significant feature of the Gen3 series. While the unit is compatible with third-party wired controllers, it features integrated weather compensation to optimize efficiency based on ambient conditions. Furthermore, the system is Smart Grid ready, allowing for integration with demand-side response programs. Installers should note that the unit utilizes R32 refrigerant, which offers a lower Global Warming Potential than legacy R410A systems.

Maintenance and troubleshooting are facilitated by a detailed error code system. A common occurrence during the first two weeks of operation is the CH14 fault code. This is typically a flow rate alarm triggered by air pockets or sediment in the hydronic circuit rather than a mechanical failure. Engineers are advised to check the internal strainers and ensure the auto-air vents (AAV) are operational. Other critical codes include CH01 for remote room air sensor issues and CH05 or CH53 for communication failures between the heater and inverter PCBs. Resistance values for sensors are standardized, with most sensors reading 5 kO at 25°C, except for the remote room air sensor which is rated at 10 kO. Proper commissioning, including a thorough system flush and air purge, is essential to prevent nuisance lockouts.

5kW 1-Phase fault codes

Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/heat-pumps/lg/5kw-1-phase#fault-1 to jump straight to the entry.

Complete list of fault codes for this LG 5kW 1-Phase
Code	Meaning	Details
1	Problem in remote room air sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 10 kO at 25 centigrade (unplugged) -+ for Remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)\nRefer resistance-temperature table to check in different temperature	Details
2	Problem in refrigerant (inlet side) sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
6	Problem in refrigerant (outlet side) sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
8	Problem in water tank sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
13	Problem in solar pipe sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
16	Problems in sensors Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
17	Problem in water-inlet sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
18	Problem in water-outlet sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
19	Problem in electric heater outlet sensor Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)	Details
10	BLOC Water pump Lock Show causes & actions Likely causes Restriction of BLOC Water pump Engineer action BLOC Water pump defect/ assembly condition abnormal\nFan lock by foreign material	Details
3	Bad communication between remote controller and unit. Show causes & actions Likely causes Incorrect connection between sensor and PCB(Heater) PCB(Heater) fault Sensor fault Engineer action Wire connection between remote controller and Main PCB assembly(Heater) should be tight\nOutput voltage of PCB should be 12 V DC	Details
5	Bad communication between Main PCB assembly(Heater) and Main PCB assembly(lnverter) of the unit. Show causes & actions Likely causes The connector for transmission is disconnected The connecting wires are misconnected The communication line is broken Main PCB assembly(lnverter) is abnormal Main PCB assembly(Heater) is abnormal Engineer action Wire connection between remote control panel and Main PCB assembly(Heater) should be tight.	Details
53	Bad communication between Main PCB assembly(Heater) and Main PCB assembly(lnverter) of the unit. Show causes & actions Likely causes The connector for transmission is disconnected The connecting wires are misconnected The communication line is broken Main PCB assembly(lnverter) is abnormal Main PCB assembly(Heater) is abnormal Engineer action Wire connection between remote control panel and Main PCB assembly(Heater) should be tight.	Details
9	PCB program (EEPROM) fault Show causes & actions Likely causes Electrical or mechanical damage a the EEPROM Engineer action This error can not be permitted	Details
14	Problem in flow switch Show causes & actions Likely causes Flow switch is open while internal water pump is working Flow switch is closed while internal water pump is not working Flow switch is open while DIP switch No. 5 of Main PCB assembly(Heater) is set as on Engineer action Flow switch should be closed while internal water pump is working or DIP switch No. 5 of Main PCB assembly(Heater) is set as on\nFlow switch should be open while internal water pump is not working	Details
15	Water pipe overheated Show causes & actions Likely causes Abnormal operation of electric heater Leaving water temperature is above 72 °C. Engineer action If there is no problem in electric heater control, possible maximum leaving water temperature is 72 °C	Details
20	Thermal fuse is damaged Show causes & actions Likely causes Thermal fuse is cut off by abnormal overheating of internalelectric heater Mechanical fault at thermal fuse Wire is damaged Engineer action This error will not be happened if temperature of electric heater tank is below 80 °C	Details
21	DC PEAK (1PM Fault) Show causes & actions Likely causes Instant over current Over Rated current Poor insulation of 1PM Engineer action An instant over current in the U,V,W phase\nComp lock\nThe abnormal connection of U,V,W\nOver load condition\nOvercharging of refrigerant Pipe length. Outdoor Fan is stop\nPoor insulation of compressor	Details
22	Max. C/T Show causes & actions Likely causes Input Over Current Engineer action 1. Malfunction of Compressor\n2. Blocking of Pipe\n3. Low Voltage Input\n4. Refrigerant, Pipe length, Blocked...	Details
23	DC Link High/ LowVolt Show causes & actions Likely causes DC Link Voltage is above 420 V DC DC Link Voltage is below 140 V DC Engineer action Check CN_(L), CN_(N) Connection\nCheck Input Voltage\nCheck PCB DC Link voltage sensor parts	Details
24	Low/High PressureSwitch Perception Error Show causes & actions Likely causes Low pressure is below 0.2 kgf/cm2 High pressure is above 42~44kgf/cm2 Pressure switch is self-defective. Engineer action Check the low/high pressure\nCheck the connection of harness	Details
26	DC CompressorPosition Show causes & actions Likely causes Compressor Starting fail error Engineer action Check the connection of comp wire "U,V,W"\nMalfunction of compressor\nCheck the component of "IPM", detection parts.	Details
27	AC Input Instant overCurrent Error Show causes & actions Likely causes PCB(lnverter) input current is over100 A(peak) for 2 us Engineer action 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge)\n2. Compressor damage (Insulation damage/Motor damage)\n3. Input voltage abnormal (L,N)\n4. Power line assemble condition abnormal\n5. PCB assembly 1 Damage (input current sensing part)	Details
29	Inverter compressorover current Show causes & actions Likely causes (HM*1M U3) Inverter Compressor input current is 35 Apk. (HM*3M U3) Inverter Compressor input current is 35 Apk. Engineer action 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge)\n2. Compressor damage(lnsulation damage/Motor damage)\n3. Input voltage low\n4. ODU PCB assembly 1 damage	Details
32	High temperature in Discharge pipe of the inverter compressor Show causes & actions Likely causes Overload operation (Outdoor fan constraint, screened, blocked) Refrigerant leakage (insufficient) Poor INV Comp Discharge sensor LEV connector displaced/ poor LEV assembly Engineer action Check outdoor fan constraint/ screened/ flow structure\nCheck refrigerant leakage\nCheck if the sensor is normal\nCheck the status of EEV assembly	Details
35	Low pressure Error Show causes & actions Likely causes Excessive decrease of low pressure Engineer action Defective low pressure sensor\nDefective unit fan\nRefrigerant shortage/leakage\nDeformation because of damage of refrigerant pipe\nDefective unit EEV\nCovering/ clogging (unit covering during the cooling mode/ unit filter clogging during heating mode)\nSVC valve clogging\nDefective unit PCB(lnverter)\nDefective unit pipe sensor	Details
41	Problem in D-pipe temperature sensor Show causes & actions Likely causes Open / Short Soldered poorly Internal circuit error Engineer action 1. Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(lnverter)	Details
43	Problem in highpressure sensor Show causes & actions Likely causes Abnormal value of sensor (Open/Short) Engineer action Bad connection of connector PCB(lnverter)\nBad connection high pressure connector\nDefect of high pressure connector (Open/Short)\nDefect of connector PCB(lnverter) (Open/Short)\nDefect of PCB(lnverter)	Details
44	Problem in outdoorair temperature sensor Show causes & actions Likely causes Open / Short Soldered poorly Internal circuit error Engineer action 1. Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(lnverter)	Details
45	Problem in Cond. middle pipe temperature sensor Show causes & actions Likely causes Open / Short Soldered poorly Internal circuit error Engineer action 1. Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(lnverter)	Details
46	Problem in suctionpipe temperature sensor Show causes & actions Likely causes Open / Short Soldered poorly Internal circuit error Engineer action 1. Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(lnverter)	Details
52	PCB CommunicationError Show causes & actions Likely causes Checking the communication state between Main PCB and Inverter PCB Engineer action Generation of noise source interfering with communication	Details
54	Open and ReversePhase Error Show causes & actions Likely causes Prevention of phase unbalance and prevention of reverse rotation of constant-rate compressor Engineer action Main power wiring fault	Details
60	PCB(lnverter) & MainEEPROM check sum error Show causes & actions Likely causes EEPROM Access error and CheckSUM error Engineer action 1. EEPROM contact defect/wrong insertion\n2. Different EEPROM Version\n3. ODU Inverter & Main PCB assembly 1 damage	Details
61	High temperature in Cond. Pipe Show causes & actions Likely causes Overload operation (Outdoor fan constraint, screened, blocked) Unit heat exchanger contaminated EEV connector displaced/ poorEEV assembly Poor Cond . Pipe sensor assembly/ burned Engineer action Check outdoor fan constraint/ screened / flow structure\nCheck if refrigerant overcharged\nCheck the status of EEV assembly\nCheck the status of sensor assembly/ burn	Details
62	Heat sink Temp,High error Show causes & actions Likely causes Heatsink temperature is greater than 110 °C. Engineer action 1. Part no. : EBR37798101 ~09 - Check the heatsink sensor: 10 kO / at25 °C(Unplugged) - Check the outdoor fan is driving rightly\n2. Part no.: EBR37798112~21 - Check the soldered condition in the 22,23 pin of 1PM,PFCM - Check the screw torque of 1PM, PFCM - Check the spreadable condition of thermal grease on 1PM, PFCM - Check the outdoor fan is driving rightly	Details
65	Problem in HeatsinkTemperature sensor Show causes & actions Likely causes Abnormal value of sensor (Open/Short) Engineer action Check if there is defect of thermistor connector (Open/Short)\nCheck defect of outdoor PCB(lnverter)	Details
67	Fan lock error Show causes & actions Likely causes Fan RPM is less than 10 for 5 seconds from start-up operation. Fan RPM is less than 40 in operationexcept for start-up operation Engineer action 1. . Fan motor damage\n2. Assembly condition abnormal\n3. Jammed fan by surroundings	Details
114	Problem in Vapor injection inlet temperature sensor Show causes & actions Likely causes Open (Below -48.7 °C)/ Short(Over 96.2 °C) Soldered poorly Internal circuit error Engineer action 1. . Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(Outdoor)	Details
115	Problem in Vapor injection outlet temperature sensor Show causes & actions Likely causes Open (Below -48.7 °C)/ Short(Over 96.2 °C) Soldered poorly Internal circuit error Engineer action 1. . Bad connection of thermistor connector\n2. Defect of thermistor connector (Open/Short)\n3. Defect of outdoor PCB(Outdoor)	Details
CH14	Flow rate alarm Show causes & actions Flow rate alarms are likely to occur during the first two weeks after commissioning due to air-pockets or sediments in the hydronic pipework. Likely causes Formation of air-pockets Sediments in the hydronic pipework Blockages in the strainer User action Advise the customers that it is quite likely and normal for a CH14 alarm to occur in the first two weeks. Engineer action Clean the strainers. If the cause was air, then a simple power reset could allow the system to continue working as normal, once the pocket of air has made its way to the AAV. Reset procedure Simple power reset	Details

Common 5kW 1-Phase problems & troubleshooting

Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.

How to fix the 5kW 1-Phase problem in remote room air sensor

Engineer: Resistance: 10 kO at 25 centigrade (unplugged) -+ for Remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)\nRefer resistance-temperature table to check in different temperature

Triggered by fault code 1.

How to fix the 5kW 1-Phase problem in refrigerant (inlet side) sensor

Engineer: Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

Triggered by fault code 2.

How to fix the 5kW 1-Phase problem in refrigerant (outlet side) sensor

Engineer: Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

Triggered by fault code 6.

How to fix the 5kW 1-Phase problem in water tank sensor

Engineer: Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor\nVoltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)

5kW 1-Phase

5kW 1-Phase at a glance

Register this LG 5kW 1-Phase on BoilerTag

5kW 1-Phase

5kW 1-Phase at a glance

Register this LG 5kW 1-Phase on BoilerTag

5kW 1-Phase data sheet

Engineer's overview

5kW 1-Phase fault codes

Common 5kW 1-Phase problems & troubleshooting

How to fix the 5kW 1-Phase problem in remote room air sensor

How to fix the 5kW 1-Phase problem in refrigerant (inlet side) sensor

How to fix the 5kW 1-Phase problem in refrigerant (outlet side) sensor

How to fix the 5kW 1-Phase problem in water tank sensor

5kW 1-Phase FAQs

Every boiler brochure, free with BoilerTag

Working on a LG 5kW 1-Phase?

How to fix the 5kW 1-Phase problem in solar pipe sensor

Likely causes that trigger multiple 5kW 1-Phase fault codes

5kW 1-Phase at a glance

Register this LG 5kW 1-Phase on BoilerTag

5kW 1-Phase at a glance

Register this LG 5kW 1-Phase on BoilerTag

5kW 1-Phase data sheet

Engineer's overview

5kW 1-Phase fault codes

Common 5kW 1-Phase problems & troubleshooting

How to fix the 5kW 1-Phase problem in remote room air sensor

How to fix the 5kW 1-Phase problem in refrigerant (inlet side) sensor

How to fix the 5kW 1-Phase problem in refrigerant (outlet side) sensor

How to fix the 5kW 1-Phase problem in water tank sensor

5kW 1-Phase FAQs

What happens if sediments are in the hydronic pipework?

What is the maximum flow temperature of the LG Therma V R32 Gen3?

What is the minimum outdoor operating temperature for this LG heat pump?

What size pipework is required for the LG Therma V R32 Gen3?

What does fault code 14 mean on an LG Therma V?

Does the LG Therma V R32 Gen3 require a buffer tank?

Is the LG Therma V R32 Gen3 Smart Grid ready?

What refrigerant does the LG Therma V R32 Gen3 use?

What is the MCB rating for the LG Therma V R32 Gen3?

Every boiler brochure, free with BoilerTag

Other LG heat pumps

Working on a LG 5kW 1-Phase?

How to fix the 5kW 1-Phase problem in solar pipe sensor

Likely causes that trigger multiple 5kW 1-Phase fault codes