All fault codes

LG Therma V error codes

What each code means, from LG Therma V's own service literature, and which UK models it applies to.

LG Therma V heat pumps

CH01Remote room-air sensor open/short19 models CH02Refrigerant inlet-pipe sensor (indoor) open/short19 models CH03Comms error, indoor ↔ wired remote controller19 models CH05Comms error, indoor Main-PCB ↔ outdoor Main-PCB19 models CH06Refrigerant outlet-pipe sensor (indoor) open/short19 models CH08DHW tank sensor open/short19 models CH09Indoor PCB EEPROM fault19 models CH13Solar-thermal sensor problem19 models CH14Flow rate alarm19 models CH15Water-pipe overheating19 models CH16Combined water-sensor fault (CH17 + CH18 + CH19 together)19 models CH17Water-inlet sensor open/short19 models CH18Water-outlet sensor open/short19 models CH19Electric-heater water-outlet sensor open/short19 models CH20Electric heater overheated (thermal cut-out / fuse blown)19 models CH231Water-pressure sensor damaged19 models CH232Flow sensor damaged19 models CH21DC peak / IPM fault (compressor stopped on power-module Fault-Out)19 models CH22CT current error (outdoor over-current)19 models CH23DC-link over/under-voltage19 models CH24High-pressure error (discharge pressure excessive)19 models CH26No-position error (compressor initial start abnormal)19 models CH27PFC over-current19 models CH29Compressor over-current (inverter input over limit)19 models CH32Discharge-pipe temperature high19 models CH34High-pressure error (condensing pressure high)19 models CH35Low-pressure error (evaporating pressure low)19 models CH40Inverter compressor CT-sensor error19 models CH41Inverter discharge-pipe sensor open/short19 models CH43High-pressure sensor open/short19 models CH44Outdoor air-temp sensor open/short19 models CH45Condenser mid-pipe sensor open/short19 models CH46Compressor suction-pipe sensor open/short19 models CH48Condenser-out-pipe thermistor not inserted / misinserted19 models CH52Comms error, outdoor Inv-PCB ↔ outdoor Main-PCB19 models CH53Comms error, outdoor did not receive the indoor signal19 models CH54Open / reverse phase (3-phase models only)19 models CH57Comms error, indoor/outdoor-cycle → outdoor Inv-PCB19 models CH60Outdoor EEPROM error19 models CH61High-pressure error (condensation pressure too high)19 models CH62Heat-sink temperature high19 models CH65Heat-sink temperature-sensor problem19 models CH67Outdoor BLDC fan lock19 models CH114Vapour-injection inlet-pipe sensor open/short19 models CH115Vapour-injection outlet-pipe sensor open/short19 models

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