Model reference
LG MT24AHNF0
Air Conditioner
1 document30 error codes10 service modes
Available documentation
Service Manual
- Multi type Air Conditioner Service Manual219 pg
MyPros+ Max
Diagnose your LG MT24AHNF0.
- 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 (30)
CodeMeaning
01Indoor room thermistor (air sensor) open or short circuit error.02Indoor inlet pipe sensor (in-piping sensor) open or short circuit error.03Communication error between indoor unit and wired remote controller.04Drain pump or float switch error (float switch open).05Communication error between indoor and outdoor unit.06Indoor outlet pipe sensor open or short circuit error.07Different mode operation error (indoor units operating in conflicting modes).21DC peak / IPM fault22CT2 max current error23DC link low voltage24Low/high pressure switch open.25AC input low or high voltage error (below 140Vac or above 300Vac).26DC compressor position detect error.27PSC fault error28DC link high voltage32Inverter compressor discharge pipe temperature high (above 105°C).33Constant compressor discharge pipe temperature high (above 105°C).40CT sensor circuit malfunction (open/short).41Inverter discharge pipe thermistor error (open/short).44Outdoor air thermistor error (open/short).45Condenser pipe thermistor error (open/short).46Suction pipe thermistor error (open/short).47Constant compressor discharge pipe thermistor error (open/short).51Over capacity combination error53Signal/communication error between indoor and outdoor unit (outdoor side…60EEPROM checksum error on outdoor PCB.61Condenser pipe sensor temperature high (above 65°C).62Heat sink sensor temperature high (above 85°C).63Condenser pipe temperature low.65Heat sink thermistor error (open/short).Service modes (10)
- Address Monitoring Mode (Wireless Remote)Press Chaos Swing button (6) and Reset button (13) simultaneously.
- Address Setting Mode (Wired Remote)Press Program button (13) and Set/Clear button (16) simultaneously for more than 3 seconds
- Address Setting Mode (Wireless Remote)Press Jet Cool button (5) and Reset button (13) simultaneously for more than 3 seconds
- Central Control Test Run1) Set wiring of system and indoor unit. 2) Apply power. 3) Do auto addressing to outdoor unit. 4)…
- ESP (External Static Pressure) Setting Mode (Duct Type)1) Press On/Off to start unit
- Forced Operation (Cassette Type)Press the forced operation button for 2 seconds.
- Forced Operation (Indoor Unit Slide Switch)Switch the slide switch on the main unit from 'remote control' position to the 'forced operation'…
- Test Run (Cassette Type)Press the forced operation button for 5 seconds.
- Test Run (CST Type - Wired Remote)Press the room temperature checking button and down timer button simultaneously for 3 seconds.
- Test Run (Room Type - Split/Art Cool/Art Cool Deluxe)Press the timer cancel button five times continuously.
Full entry steps, exit procedures, and test sequences are available in Max.
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