Model reference
LG LRNU07GSPM0
Air Conditioner
1 document124 error codes5 service modes
Available documentation
Service Manual
- Air Conditioner Service Manual R22263 pg
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Error codes (124)
CodeMeaning
01Indoor unit air temperature sensor is open or short.02Indoor unit inlet pipe temperature sensor is open or short.03Transmission error between wired remote controller and indoor unit04Drain pump malfunction05Transmission error between outdoor unit and indoor unit06Indoor unit outlet pipe temperature sensor is open or short.07Operation mode between indoor unit and outdoor unit is different.09Indoor unit EEPROM serial number error10Indoor unit BLDC fan motor failure100Discharge temperature of constant speed compressor 1 of sub1 outdoor unit…101Discharge temperature of constant speed compressor 2 of sub1 outdoor unit…102Discharge temperature of constant speed compressor 1 of sub2 outdoor unit…103Discharge temperature of constant speed compressor 2 of sub2 outdoor unit…104Transmission error from sub1 outdoor unit to main outdoor unit105Transmission error from fan PCB to main PCB of outdoor unit.106Over-current of main outdoor fan motor (IPM fault).107Low voltage of main outdoor fan motor driver108Transmission error between main PCB and fan PCB (both directions).109High pressure switch of sub1 outdoor unit operated by high pressure rising.11Indoor unit transmission error110Reverse connection or missing phase of R, S, T power of sub1 outdoor unit.111Transmission error from main outdoor unit to sub1 outdoor unit113Outdoor unit liquid pipe (condenser) temperature sensor of main unit is open or…114Subcooling inlet temperature sensor of main outdoor unit is open or short.115Subcooling outlet temperature sensor of main outdoor unit is open or short.116High pressure sensor of sub1 outdoor unit is open or short.117Low pressure sensor of sub1 outdoor unit is open or short.118Air temperature sensor of sub1 outdoor unit is open or short.120Suction temperature sensor of sub1 outdoor unit is open or short.121Discharge temperature sensor of constant speed compressor 1 of sub1 outdoor…View all 124 error codes
122Discharge temperature sensor of constant speed compressor 2 of sub1 outdoor…123Heat exchanger A pipe temperature sensor of sub1 outdoor unit is open or short.124Heat exchanger B pipe temperature sensor of sub1 outdoor unit is open or short.125Liquid pipe (condenser) temperature sensor of sub1 outdoor unit is open or…126Subcooling inlet temperature sensor of sub1 outdoor unit is open or short.127Subcooling outlet temperature sensor of sub1 outdoor unit is open or short.128High pressure sensor of sub2 outdoor unit is open or short.129Low pressure sensor of sub2 outdoor unit is open or short.130Air temperature sensor of sub2 outdoor unit is open or short.132Suction temperature sensor of sub2 outdoor unit is open or short.133Discharge temperature sensor of constant speed compressor 1 of sub2 outdoor…134Discharge temperature sensor of constant speed compressor 2 of sub2 outdoor…135Heat exchanger A pipe temperature sensor of sub2 outdoor unit is open or short.136Heat exchanger B pipe temperature sensor of sub2 outdoor unit is open or short.137Liquid pipe (condenser) temperature sensor of sub2 outdoor unit is open or…138Subcooling inlet temperature sensor of sub2 outdoor unit is open or short.139Subcooling outlet temperature sensor of sub2 outdoor unit is open or short.140High pressure switch of sub2 outdoor unit operated141Reverse connection or missing phase of R, S, T power of sub2 outdoor unit.142Transmission error between sub2 outdoor unit and main outdoor unit.143High pressure of sub1 outdoor unit excessive144Low pressure of sub1 outdoor unit excessive drop145High pressure of sub2 outdoor unit excessive146Low pressure of sub2 outdoor unit excessive drop147Low or over voltage of sub1 outdoor unit148Voltage detection circuit of sub1 outdoor unit is out of order.149Low or over voltage of sub2 outdoor unit150Voltage detection circuit of sub2 outdoor unit is out of order.151Function error of 4-way reversing valve in main or sub outdoor units152Discharge temperature of constant speed compressor 1 of sub3 outdoor unit…153Discharge temperature of constant speed compressor 2 of sub3 outdoor unit…154High pressure switch of sub3 outdoor unit operated.155Reverse connection or missing phase of R, S, T power of sub3 outdoor unit.156Transmission error between sub3 outdoor unit and main outdoor unit.157High pressure sensor of sub3 outdoor unit is open or short.158Low pressure sensor of sub3 outdoor unit is open or short.159Air temperature sensor of sub3 outdoor unit is open or short.161Suction temperature sensor of sub3 outdoor unit is open or short.162Discharge temperature sensor of constant speed compressor 1 of sub3 outdoor…163Discharge temperature sensor of constant speed compressor 2 of sub3 outdoor…164Heat exchanger A pipe temperature sensor of sub3 outdoor unit is open or short.165Heat exchanger B pipe temperature sensor of sub3 outdoor unit is open or short.166Liquid pipe (condenser) temperature sensor of sub3 outdoor unit is open or…167Subcooling inlet temperature sensor of sub3 outdoor unit is open or short.168Subcooling outlet temperature sensor of sub3 outdoor unit is open or short.169High pressure of sub3 outdoor unit excessive170Low pressure of sub3 outdoor unit excessive drop171Low or over voltage of sub3 outdoor unit.172Voltage detection circuit of sub3 outdoor unit is out of order.173Abnormal starting of main constant speed compressor174Abnormal starting of sub1 constant speed compressor 1.175Abnormal starting of sub1 constant speed compressor 2.176Abnormal starting of sub2 constant speed compressor 1.177Abnormal starting of sub2 constant speed compressor 2.200Pipe detection error201HR unit 1 liquid pipe temperature sensor is open or short.202HR unit 1 subcooling inlet pipe temperature sensor is open or short.203HR unit 1 subcooling discharge pipe temperature sensor is open or short.204Transmission error between HR unit 1 and outdoor unit.21DC peak / IPM fault or overcurrent to inverter compressor.22Overcurrent flows to inverter compressor23DC voltage charging not performed after starting relay turns on for inverter…24High pressure switch of main outdoor unit operated240Central controller connector error (CNU connection failure)241Central controller data transmission error242Central controller receive error243Central controller receive buffer overflow244Central controller to CNU data transmission failure245Central controller send timeout246Central controller receive timeout25Input voltage is out of tolerable range (low or over voltage at main PCB).250Central controller checksum error251Central controller receive zero error252Central controller wrong address error32Inverter compressor discharge temperature excessive rise at main outdoor unit33Constant speed compressor discharge temperature excessive rise at main outdoor…34High pressure of main outdoor unit excessive35Low pressure of main outdoor unit excessive drop40Low current at CT41Discharge temperature sensor of inverter compressor is open or short.42Low pressure sensor of main outdoor unit is open or short.43High pressure sensor of main outdoor unit is open or short.44Air temperature sensor of main outdoor unit is open or short.45Temperature sensor of front-side heat exchanger of main outdoor unit is open or…46Suction temperature sensor of main outdoor unit is open or short.47Discharge temperature sensor of constant speed compressor of main outdoor unit…48Temperature sensor of rear-side heat exchanger of main outdoor unit is open or…51Excessive capacity of indoor units connected compared to outdoor unit capacity…52Transmission error from inverter PCB to main PCB53Transmission error from indoor unit to main PCB of outdoor unit54Reverse connection or missing phase of R, S, T power of main outdoor unit.57Transmission error from main PCB to inverter PCB62Overheat of inverter heatsink.65Heat sink temperature sensor of inverter fan control PCB is open or short.
Service modes (5)
- auto_addressing_outdoor["Ensure power is on for all indoor and outdoor units.","Wait at least 3 minutes.","Press and hold…
- data_display_mode_outdoor["Turn on DIP switch No.7 and No.8 on the main outdoor PCB.","Press and hold the auto-address push…
- forced_operation_indoor["Press the forced operation (power) button on the indoor unit main body."]
- instant_indoor_unit_checking["Set DIP switch
- test_operation_indoor["Supply power to the indoor unit.","Press and hold the ON/OFF button for 3-5 seconds until the…
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