Model reference

LG MFL68280201

Air Conditioner

1 document35 error codes5 service modes

Available documentation

Service Manual

Air Conditioner Service Manual - Multi-Inverter Type113 pg
Covers this model

MyPros+ Max

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Test values, resistance specs, and wiring references
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M+

M+ Max·LG Air Conditioner

01 on my LG MFL68280201

M+

Indoor room thermistor (air sensor)

From Service Manual 503315, p.47:

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 (35)

CodeMeaning

01Indoor room thermistor (air sensor) error 02Indoor inlet pipe sensor error 03Wired remote controller communication error.04Drain pump / float switch error.05Communication error between indoor and outdoor units.06Indoor outlet pipe sensor error 07Different mode operation error 09Indoor EEPROM check sum error.10Indoor BLDC fan motor lock 21DC link peak / IPM fault 22AC input current higher than the limit (CT max / input over current).23DC link high voltage (above 420Vdc) or low voltage (below 140Vdc).25Input voltage abnormal 26DC compressor position / starting fail error 27PSC/PFC fault error 29Inverter compressor over current 32High temperature in discharge pipe of the inverter compressor.35Low pressure error 39Communication error between PFC Micom and INV Micom.40CT sensor error 41Inverter discharge pipe thermistor sensor error 43High pressure sensor error 44Outdoor air thermistor sensor error 45Condenser mid-pipe thermistor sensor error 46Suction pipe thermistor sensor error 48Condenser out-pipe thermistor sensor error 51Over capacity combination 53Communication error between indoor and outdoor units 543-phase wrong wiring of outdoor unit (reverse phase/omission of phase).60Outdoor unit EEPROM check sum error

View all 35 error codes

61High temperature in outdoor condenser pipe.62Heatsink temperature high 65Heatsink thermistor sensor error 67Outdoor BLDC fan lock error 73PFC fault error (software)

Service modes (5)

Forced OperationPress the ON/OFF button on the main unit for 2 seconds.
Installer Setting Mode (E.S.P. / Two Thermistor Control)Press OPER button and MODE button simultaneously for more than 3 seconds to enter installer setting…
Pump Down1) Shut power off
Test Run (Ceiling Cassette type)Press the room temperature checking button and down timer button simultaneously for 3 seconds.
Test Run (Split/ART Cool type)Press button for 3-6 seconds to start test run.

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

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