Model reference

LG L8UC100BFA0

Air Conditioner

2 documents29 error codes7 service modes

Available documentation

Service Manual

LG Multi Type Air Conditioner SERVICE MANUAL153 pg
Covers this model
Multi Type Air Conditioner SERVICE MANUAL153 pg
Covers this model

MyPros+ Max

Diagnose your LG L8UC100BFA0.

Step-by-step diagnostics from the service manual
Test values, resistance specs, and wiring references
Verified part numbers when replacement is needed

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M+

M+ Max·LG Air Conditioner

01 on my LG L8UC100BFA0

M+

Indoor room thermistor (air sensor)

From Service Manual 162913, p.45:

1.Access service mode to confirm the active fault code and read stored error history.

2.Disconnect the sensor and measure resistance. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens. A reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part 6322FR2046G

Temperature thermistor

Error codes (29)

CodeMeaning

01Indoor room thermistor (air sensor) error 02Indoor inlet pipe sensor error 03Communication error between indoor unit and wired remote controller.04Drain pump / float switch error 05Communication error between indoor and outdoor unit.06Indoor outlet pipe sensor error 07Different mode operation 21DC Peak / IPM Fault 22CT2 Max Current 23DC Link Low Voltage 24Low/High pressure switch open.25AC input voltage abnormal 26DC compressor position detect error.27PSC Fault 28DC Link High Voltage 32Discharge pipe temperature high (inverter compressor).33Discharge pipe temperature high (constant compressor)40CT sensor circuit malfunction 41Inverter discharge pipe thermistor error 44Outdoor air thermistor error 45Condenser pipe thermistor error 46Suction pipe sensor error 47Constant compressor discharge pipe thermistor error 51Over capacity 53Communication signal error between indoor and outdoor unit.60EEPROM check sum error 61Condenser pipe sensor temperature high 62Heat sink sensor temperature high 65Heat sink thermistor error

Service modes (7)

address_monitoringPress Chaos Swing (button 6) and Reset (button 13) keys simultaneously to enter Address Monitoring…
address_setting_wired_remote1
address_setting_wireless_remote1
esp_setting1
forced_operationOn the indoor unit, switch the slide switch from the remote control position to the forced…
test_run_cassetteFor cassette type
test_run_room_typeFor room type

Full entry steps, exit procedures, and test sequences are available in Max.

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