Model reference
LG MT18AH
Air Conditioner
1 document9 error codes3 service modes
Available documentation
Service Manual
- Air Conditioner Service Manual - Multi Air Conditioner Indoor Unit38 pg
MyPros+ Max
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- 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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Error codes (9)
CodeMeaning
01Indoor room thermistor (air sensor) error02Indoor inlet pipe temperature sensor error03Wired remote controller communication error.04Drain pump / float switch error.05Communication error between indoor and outdoor units06Indoor outlet pipe temperature sensor error07Different mode operation09EEPROM checksum error on indoor unit PCB.10BLDC indoor fan motor lock error.Service modes (3)
- Child Lock["Press the preset and minute setup buttons simultaneously for 3 seconds on the wired remote…
- E.S.P. (External Static Pressure) Setting Mode["Turn on the unit by pressing the On/Off button.","Press the 'Timer' and 'Wind' buttons…
- Forced Operation["Press the ON/OFF button on the main unit of the appliance (used when remote control is lost)."]
Full entry steps, exit procedures, and test sequences are available in Max.
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