How do I register a LG Therma V R32 Gen3 with BoilerTag?

To register an LG Therma V R32 Gen3 with BoilerTag, scan the QR code on the BoilerTag sticker after installation. The system will pre-fill model details from our appliance catalogue. Confirm the information, record the installation date and your Gas Safe number. This creates a permanent, publicly viewable service log for the appliance. The first 12 BoilerTag stickers are free for engineers. Order free BoilerTag stickers from the engineer dashboard.

What is the LG Therma V R32 Gen3?

The LG Therma V R32 Gen3 is an MCS certified air-source monobloc heat pump using R32 refrigerant, designed for UK domestic heating. It offers a range of capacities and features like weather compensation, making it suitable for various residential installations.

What should be expected regarding flow rate alarms, blocked filters, and air pockets during the first two weeks after commissioning?

Flow rate alarms are common in the first two weeks post-commissioning due to air-pockets, which usually migrate to auto-airvents without intervention. Sediments in pipework can block the internal strainer, causing CH14 alarms that require cleaning. Advise customers that CH14 alarms are likely and normal initially. A power reset can resolve air-related issues once air reaches the AAV.

Is the LG Therma V R32 Gen3 MCS certified and eligible for the BUS grant?

Yes, the LG Therma V R32 Gen3 is MCS certified, which is a prerequisite for eligibility for the Boiler Upgrade Scheme (BUS) grant in England and Wales. While MCS certification confirms compliance with UK standards, specific BUS grant eligibility depends on individual project criteria and application approval.

What does fault code 1 mean on the LG Therma V R32 Gen3 heat pump?

Fault code 1 indicates a problem with the remote room air sensor. Likely causes include an incorrect connection between the sensor and the PCB (Heater), a fault with the PCB (Heater) itself, or a defective sensor. Engineers should check the sensor's resistance, which should be 10 kΩ at 25°C when unplugged.

What are the minimum installation clearances for the LG Therma V R32 Gen3?

For the LG Therma V R32 Gen3 monobloc unit, a minimum clearance of 700mm is required at the front. A minimum clearance of 300mm is needed behind the unit. These clearances ensure adequate airflow, operational efficiency, and accessibility for maintenance and servicing.

What type of refrigerant does the LG Therma V R32 Gen3 use?

The LG Therma V R32 Gen3 heat pump utilises R32 refrigerant. R32 is a single-component hydrofluorocarbon (HFC) refrigerant known for its lower Global Warming Potential (GWP) compared to older refrigerants like R410A, making it a more environmentally conscious choice for heating systems.

What does fault code 1 mean on the LG 14kW 3-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

What does fault code 2 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensor…

What does fault code 6 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all senso…

What does fault code 8 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resis…

What does fault code 13 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resis…

What does fault code 17 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resi…

What does fault code 18 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer res…

What does fault code 19 mean on the LG 14kW 3-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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors)…

What does fault code 10 mean on the LG 14kW 3-Phase?

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

What does fault code 3 mean on the LG 14kW 3-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 Output voltage of PCB should be12 V DC

What does fault code 5 mean on the LG 14kW 3-Phase?

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

What does fault code 9 mean on the LG 14kW 3-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 14kW 3-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 14kW 3-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 14kW 3-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 tankis below 80 °C

What does fault code 21 mean on the LG 14kW 3-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 Comp lock The abnormal connection of U,V,W Over load condition Overcharging of refrigerant Pipe length.Outdoor Fan is stop Poor insulation of compressor

What does fault code 22 mean on the LG 14kW 3-Phase?

Max. C(T Likely causes: Input Over Current. 1. Malfunction of Compressor 2. Blocking of Pipe 3. Low Voltage Input 4. Refrigerant, Pipe length, Blocked...

What does fault code 23 mean on the LG 14kW 3-Phase?

DC Link High/LowVolt Likely causes: DC Link Voltage is above 420 V DC; DC Link Voltage is below 140 V DC. Check CN_(L), CN_(N) Connection Check Input Voltage Check PCB DC Link voltage sensor parts

What does fault code 24 mean on the LG 14kW 3-Phase?

Low/High PressureSwitch Perception Error Likely causes: Low pressure is below 0.2 kgf/cm².; High pressure is above 42~44kgf /cm².; Pressure switch is self-defective.. Check the low/high pressure Check the connection of harness

What does fault code 26 mean on the LG 14kW 3-Phase?

DC CompressorPosition Likely causes: Compressor Starting fail error. Check the connection of comp wire "U,V,W" Malfunction of compressor Check the component of "IPM", detection parts.

What does fault code 27 mean on the LG 14kW 3-Phase?

AC Input Instant overCurrent Error Likely causes: PCB(Inverter) input current is over100 A(peak) for 2 us. 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) 2. Compressor damage (Insulation damage/Motor damage) 3. Input voltage abnormal (L,N) 4. Power line assemble condition…

What does fault code 29 mean on the LG 14kW 3-Phase?

Inverter compressorover current Likely causes: (HM**1M U*3) Inverter Compressor input current is 35 Apk.; (HM**3M U*3) Inverter Compressor input current is 35 Apk.. 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) 2. Compressor damage (Insulation damage/Motor damage) 3. Inp…

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14kW 3-Phase

The LG Therma V R32 Gen3 is an MCS certified R32 monobloc air-source heat pump, requiring a buffer tank and operating on 230V with a 16A MCB. It supports weather compensation and is smart grid ready.

The LG Therma V R32 Gen3 is an air-source monobloc heat pump designed for UK domestic heating applications. This page provides essential technical specifications, installation guidance, and a detailed list of fault codes for heating engineers. Homeowners researching this model will also find key information regarding its operation and regulatory compliance. Understanding these details is crucial for correct installation, maintenance, and troubleshooting.

14kW 3-Phase at a glance

Type: air source · monobloc
Refrigerant: R32
Manufacturer: LG

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14kW 3-Phase data sheet

Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.

Identification▼

Model name: LG Therma V R32 Gen3
Manufacturer: LG
Product family: Therma V R32 Monobloc

Type▼

Heat pump type: Air-source
Configuration: Monobloc
Inverter: Inverter

Refrigerant▼

Refrigerant: R32

Regulatory▼

MCS certified: Yes

Electrical▼

Voltage: 230 V
MCB rating: 16 A

Hydraulic▼

Buffer tank required: Yes

Controls▼

Weather compensation: Yes
Smart grid ready: Yes

Installation▼

Clearance (front): 700 mm
Clearance (behind): 300 mm

Engineer's overview

The LG Therma V R32 Gen3 series comprises monobloc air-source heat pumps utilising R32 refrigerant. These units are MCS certified, indicating compliance with UK standards for renewable heating installations. Installation requires a minimum front clearance of 700mm and a rear clearance of 300mm for optimal performance and maintenance access. Electrical connection is 230V, with a recommended MCB rating of 16A. A buffer tank is required for system operation. The system supports weather compensation and is smart grid ready, offering flexibility in control and energy management. This appliance is designed for integration into modern hydronic heating systems, providing efficient space heating and domestic hot water.

14kW 3-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/14kw-3-phase#fault-1 to jump straight to the entry.

Complete list of fault codes for this LG 14kW 3-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	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature	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 Fan 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 Output voltage of PCB should be12 V DC	Details
5	Bad communication between Main PCB assembly(Heater) and Main PCB assembly(Inverter) 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(Inverter) 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 setas on Flow 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 tankis 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 Comp lock The abnormal connection of U,V,W Over load condition Overcharging of refrigerant Pipe length.Outdoor Fan is stop Poor insulation of compressor	Details
22	Max. C(T Show causes & actions Likely causes Input Over Current Engineer action 1. Malfunction of Compressor 2. Blocking of Pipe 3. Low Voltage Input 4. 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 Check Input Voltage Check 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 Check 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" Malfunction of compressor Check the component of "IPM", detection parts.	Details
27	AC Input Instant overCurrent Error Show causes & actions Likely causes PCB(Inverter) input current is over100 A(peak) for 2 us Engineer action 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) 2. Compressor damage (Insulation damage/Motor damage) 3. Input voltage abnormal (L,N) 4. Power line assemble condition abnormal 5. 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) 2. Compressor damage (Insulation damage/Motor damage) 3. Input voltage low 4. 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 Check if refrigerant overcharged Check if the sensor is normal Check 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 Defective unit fan Refrigerant shortage/leakage Deformation because of damage of refrigerant pipe Defective unit EEV Covering/clogging (unit covering during the cooling mode/ unit filter clogging during heating mode) SVC valve clogging Defective unit PCB(Inverter) Defective 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 2. Defect of thermistor connector (Open/Short) 3. Defect of outdoor PCB(Inverter)	Details
43	Problem in highpressure sensor Show causes & actions Likely causes Abnormal value of sensor (Open/Short) Engineer action Bad connection of connector PCB(Inverter) Bad connection high pressure connector Defect of high pressure connector (Open/Short) Defect of connector PCB(Inverter) (Open/Short) Defect of PCB(Inverter)	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 2. Defect of thermistor connector (Open/Short) 3. Defect of outdoor PCB (Inverter)	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 2. Defect of thermistor connector (Open/Short) 3. Defect of outdoor PCB (Inverter)	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 2. Defect of thermistor connector (Open/Short) 3. Defect of outdoor PCB(Inverter)	Details
52	PCB Communication Error 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(Inverter) & MainEEPROM check sum error Show causes & actions Likely causes EEPROM Access error and CheckSUM error Engineer action 1. EEPROM contact defect/wrong insertion 2. Different EEPROM Version 3. ODU Inverter & Main PCB assembly 1 damage	Details
61	High temperaturein 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 Check if refrigerant overcharged Check the status of EEV assembly Check the status of sensor assembly/ burn	Details
62	Heat sink Temp, High error Show causes & actions Likely causes Heatsink temperature is greater than110 °C. Engineer action 1. Part no.: EBR37798101~09 - Check the heatsink sensor: 10 kO / at25 °C(Unplugged) - Check the outdoor fan is driving rightly 2. 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 on1PM, PFCM - Check the outdoor fan is driving rightly	Details
65	Problem in Heatsink Temperature sensor Show causes & actions Likely causes Abnormal value of sensor (Open/Short) Engineer action Check if there is defect of thermistor connector (Open/Short) Check defect of outdoor PCB(Inverter)	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 2. Assembly condition abnormal 3. 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 2. Defect of thermistor connector (Open/Short) 3. 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 2. Defect of thermistor connector (Open/Short) 3. Defect of outdoor PCB(Outdoor)	Details

Common 14kW 3-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 14kW 3-Phase problem in remote room air sensor

Engineer: Resistance: 10 kO at 25 centigrade (unplugged) -+ for Remote room air sensor

Triggered by fault code 1.

How to fix the 14kW 3-Phase problem in refrigerant (inlet side) sensor

Engineer: Resistance: 5 kO at 25 centigrade (unplugged)-+ for all sensors EXCEPT remote room air sensor Voltage: 2.5 V DC at 25 centigrade (plugged) (for all sensors) Refer resistance-temperature tableto check in different temperature

Triggered by fault code 2.

How to fix the 14kW 3-Phase problem in refrigerant (outlet side) sensor

Triggered by fault code 6.

How to fix the 14kW 3-Phase problem in water tank sensor

Triggered by fault code 8.

How to fix the 14kW 3-Phase problem in solar pipe sensor

Triggered by fault code 13.

Likely causes that trigger multiple 14kW 3-Phase fault codes

Incorrect connection between sensor and pcb(heater): Fault codes: 1, 2, 6, 8, 13, 16, 17, 18, 19, 3
Pcb(heater) fault: Fault codes: 1, 2, 6, 8, 13, 16, 17, 18, 19, 3
Sensor fault: Fault codes: 1, 2, 6, 8, 13, 16, 17, 18, 19, 3
Internal circuit error: Fault codes: 41, 44, 45, 46, 114, 115
Soldered poorly: Fault codes: 41, 44, 45, 46, 114, 115
Open / short: Fault codes: 41, 44, 45, 46
Abnormal value of sensor (open/short): Fault codes: 43, 65
Open (below -48.7 °c)/ short(over 96.2 °c): Fault codes: 114, 115
Overload operation (outdoor fan constraint, screened, blocked): Fault codes: 32, 61
(hm**1m u*3) inverter compressor input current is 35 apk: Fault codes: 29
(hm**3m u*3) inverter compressor input current is 35 apk: Fault codes: 29
Abnormal operation of electric heater: Fault codes: 15

14kW 3-Phase FAQs

Common questions from engineers and homeowners about the LG 14kW 3-Phase.

How do I register a LG Therma V R32 Gen3 with BoilerTag?: To register an LG Therma V R32 Gen3 with BoilerTag, scan the QR code on the BoilerTag sticker after installation. The system will pre-fill model details from our appliance catalogue. Confirm the information, record the installation date and your Gas Safe number. This creates a permanent, publicly viewable service log for the appliance. The first 12 BoilerTag stickers are free for engineers. Order free BoilerTag stickers from the engineer dashboard.
What is the LG Therma V R32 Gen3?: The LG Therma V R32 Gen3 is an MCS certified air-source monobloc heat pump using R32 refrigerant, designed for UK domestic heating. It offers a range of capacities and features like weather compensation, making it suitable for various residential installations.
What should be expected regarding flow rate alarms, blocked filters, and air pockets during the first two weeks after commissioning?: Flow rate alarms are common in the first two weeks post-commissioning due to air-pockets, which usually migrate to auto-airvents without intervention. Sediments in pipework can block the internal strainer, causing CH14 alarms that require cleaning. Advise customers that CH14 alarms are likely and normal initially. A power reset can resolve air-related issues once air reaches the AAV.

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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 28 June 2026.

14kW 3-Phase at a glance

Register this LG 14kW 3-Phase on BoilerTag

14kW 3-Phase data sheet

Engineer's overview

14kW 3-Phase fault codes

Common 14kW 3-Phase problems & troubleshooting

How to fix the 14kW 3-Phase problem in remote room air sensor

How to fix the 14kW 3-Phase problem in refrigerant (inlet side) sensor

How to fix the 14kW 3-Phase problem in refrigerant (outlet side) sensor

How to fix the 14kW 3-Phase problem in water tank sensor

How to fix the 14kW 3-Phase problem in solar pipe sensor

Likely causes that trigger multiple 14kW 3-Phase fault codes

14kW 3-Phase FAQs

Is the LG Therma V R32 Gen3 MCS certified and eligible for the BUS grant?

What does fault code 1 mean on the LG Therma V R32 Gen3 heat pump?

What are the minimum installation clearances for the LG Therma V R32 Gen3?

What type of refrigerant does the LG Therma V R32 Gen3 use?

Every boiler brochure, free with BoilerTag

Other LG heat pumps

Working on a LG 14kW 3-Phase?

14kW 3-Phase at a glance

Register this LG 14kW 3-Phase on BoilerTag

14kW 3-Phase data sheet

Engineer's overview

14kW 3-Phase fault codes

Common 14kW 3-Phase problems & troubleshooting

How to fix the 14kW 3-Phase problem in remote room air sensor

How to fix the 14kW 3-Phase problem in refrigerant (inlet side) sensor

How to fix the 14kW 3-Phase problem in refrigerant (outlet side) sensor

How to fix the 14kW 3-Phase problem in water tank sensor

How to fix the 14kW 3-Phase problem in solar pipe sensor

Likely causes that trigger multiple 14kW 3-Phase fault codes

14kW 3-Phase FAQs

Is the LG Therma V R32 Gen3 MCS certified and eligible for the BUS grant?

What does fault code 1 mean on the LG Therma V R32 Gen3 heat pump?

What are the minimum installation clearances for the LG Therma V R32 Gen3?

What type of refrigerant does the LG Therma V R32 Gen3 use?

Every boiler brochure, free with BoilerTag

Other LG heat pumps

Working on a LG 14kW 3-Phase?