Model reference

Lg Samsung MH052FECA

Name: Lg Samsung MH052FECA
Brand: Lg Samsung

Air Conditioner

3 documents31 error codes10 service modes

Available documentation

Service Manual

Samsung MH080FXCA4A Service Manual108 pg
Covers this model
Free Joint Multi Air Conditioner Service130 pg
Covers this model

Installation Guide

LG Samsung NJ030MHXCA Precaution2 pg
Covers this model

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E101 on my Lg Samsung MH052FECA

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Communication error - indoor unit

From Service Manual 145602, p.14:

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

2.Measure door lock assembly resistance across PTC terminals. Expected: ~200 ohms cold.

3.Inspect strike and latch alignment. A misaligned strike prevents the switch stack from closing.

Part W10810403

Door lock assembly

Error codes (31)

CodeMeaning

E101Communication error E121Indoor unit room temperature sensor error (open or short).E122Indoor unit heat exchanger in temperature sensor error (open or short).E123Indoor unit heat exchanger out temperature sensor error (open or short).E128Try-run mode self-diagnostic error (evaporator pipe in sensor related).E129Try-run mode self-diagnostic error (evaporator pipe out sensor related).E154Indoor unit fan motor error (below 450RPM for 15 minutes).E161Error of mixed operation E162Indoor unit EEPROM error.E163Indoor unit EEPROM option error (option not set up or option data error).E190Failure of pipe check operation E199No pipe check operation performed after installation through auto addressing…E201Communication error between outdoor and indoor unit E202Communication error caused by outdoor unit communication part trouble or indoor…E203Outdoor communication error between outdoor main PCB and sub PCB.E221Outside temperature sensor error (short/open)E230Compressor OLP sensor error (short/open)E237Condenser out sensor error (short/open)E246Try-run mode self-diagnostic error.E251Condenser temperature sensor error (short/open)E261Try-run mode self-diagnostic error.E320Compressor OLP sensor error (short/open)E401Outdoor unit freezing (compressor stop)E404Outdoor unit overload E416Outdoor unit high discharge temperature E419Try-run mode self-diagnostic error.E422Try-run mode self-diagnostic error.E440High temperature (over 30°C) of outdoor in heating mode E441Low temperature (under -10°C) of outdoor in cooling mode E458Outdoor fan error.

View all 31 error codes

E554Try-run mode self-diagnostic error.

Service modes (10)

Cool Mode Try-Run["Push K2 button on outdoor display PCB three times."]
Heat Mode Try-Run["Push K2 button on outdoor display PCB once."]
Option Setup Mode["Step 1: Remove batteries from remote control.","Step 2: Press the temperature button…
Option Setup Mode (Indoor Unit via Remote Control)1
Pipe Check Operation (Auto Addressing)1
Pipe Checking Operation (Auto Addressing Mode)["Turn on outdoor unit and wait 60 seconds (DIS01 will show 00-01-02-...15-00).","E199 will display…
Pump Down Mode["Push K2 button on outdoor display PCB (specific number of pushes as indicated on PCB display…
Refrigerant Charging Mode["Push K2 button on outdoor display PCB (specific number of pushes as indicated on PCB display…
View Mode (Outdoor PCB Data Display)Press K4 button on outdoor display PCB repeatedly to cycle through data indices 0-15.
View Mode (Outdoor PCB Display)["Press K4 key on the outdoor display PCB repeatedly to cycle through display data indexes (0-15)."]

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