Model reference

Samsung ND072CHXCB

Air Conditioner

4 documents68 error codes3 service modes

Available documentation

Service Manual

LG Samsung AVXWNH072CE ND052CHXCB ND072CHXCB Precaution2 pg
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LG Samsung AVXWNH072CE ND052CHXCB ND072CHXCB Troubleshooting122 pg
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Tech Sheet

LG Samsung AVXWNH072CE ND052CHXCB ND072CHXCB Product Specification54 pg
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Wiring Diagram

LG Samsung AVXWNH072CE ND052CHXCB ND072CHXCB Wiring Diagram16 pg
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Indoor unit room temperature sensor

From Service Manual 593847, p.19:

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 DA32-10105R

Temperature sensor

Error codes (68)

CodeMeaning

121Indoor unit room temperature sensor error (Open/Short)122Indoor unit heat exchanger IN sensor error (Open/Short)123Indoor unit heat exchanger OUT sensor error (Open/Short)128Indoor unit heat exchanger IN sensor dislocation error.129Indoor unit heat exchanger OUT sensor dislocation error.130Simultaneous indoor unit heat exchanger IN and OUT sensor dislocation error.135Indoor clean fan rotational frequency feedback error.1512nd opening error of indoor electrically operated valve (EEV).1522nd closing error of indoor electrically operated valve (EEV).153Indoor floating sensor error (drain pump float switch detection).154Indoor fan motor error 161Mixed operation error 162EEPROM error 163Indoor unit remote controller option input is wrong or not entered (EEPROM…170Mixed use of Fahrenheit/Celsius setup 185Power input error into indoor unit communication line 186Clean Unit (SPi) feedback error.201Communication error between indoor and outdoor units after completing initial…202Communication error among all indoor units.203Communication error between main and sub outdoor units or between main and sub…221Outdoor unit temperature sensor error (Open/Short)226Outdoor temperature sensor dislocation error.231COND OUT main temperature sensor error (Open/Short)241Outdoor COND OUT temperature sensor dislocation error.246Outdoor COND OUT temperature sensor dislocation error (RD040/050 model).251Digital compressor discharge temperature sensor error (Open/Short)257Fixed scroll compressor 2 discharge temperature sensor error (Open/Short)258Fixed scroll compressor 3 discharge temperature sensor error (Open/Short)261Digital compressor discharge temperature sensor dislocation error.263Fixed scroll compressor 2 discharge temperature sensor dislocation error.

View all 68 error codes

264Fixed scroll compressor 3 discharge temperature sensor dislocation error.265SUMP sensor dislocation error.269SUCTION sensor dislocation error.271SUMP temperature digital sensor error (Open/Short)291High pressure sensor error (Open/Short)296Low pressure sensor error (Open/Short)307Oil balance valve (balance keeping) temperature sensor error (Open/Short)308Suction temperature sensor error (Open/Short)311Liquid pipe (double pipe) temperature sensor error (Open/Short)312Main cooling solenoid valve open error.320OLP sensor error (Open/Short).321EVI IN temperature sensor error (Open/Short)322EVI OUT temperature sensor error (Open/Short)403Freezing control causes compressor down 407Compressor down by high pressure sensor protection control 410Compressor down by low pressure sensor protection control 413Protection control by SUMP sensor 416Compressor down by discharge temperature 425Outdoor compression ratio error / 3-phase reverse phase or phase fail detection 428Compressor down by compression ratio control 431Balance keeping valve 1 (oil valve) self-diagnosis 438EVI EEV opening error.440Prohibit heating operation for outdoor temperature over 86F/30C.442Prohibit heat filling mode for outdoor temperature over 59F/15C.443High pressure below the average before cooling 452Instant blackout error / outdoor unit power frequency error.453Error by high temperature outdoor fan motor 454Outdoor fan RPM error 456Outdoor fan over-voltage error 457Outdoor fan counter-rotation error 458Over-voltage error detected in compressor current sensor 461Low-voltage (low-amperage) error detected in compressor current sensor 462Current protection control causes compressor down 463OLP protection control causes compressor down 475Electrical malfunctions of the outdoor machine (fan stuck, poor connection…477Liquid compressor protection control 7021st close indoor electrically operated valve error.7031st open indoor electrically operated valve error.

Service modes (3)

PCB Option Code Input Mode (10-digit, e.g., 660157022E, for AVXWNHC/NDN models)["Step 1: Remove batteries from remote control.","Step 2: Press both temperature buttons…
PCB Option Code Input Mode (12-digit code, e.g., 021E31142285)["Step 1
PCB Option Code Input Mode (12-digit with dash, e.g., 066064-170373, for AVXWVHC/NDV models)["Step 1: Remove batteries from remote control.","Step 2: Press both temperature buttons…

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

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