Model reference

Samsung RD075VRXFA

Air Conditioner

6 documents68 error codes3 service modes

Available documentation

Service Manual

LG Samsung RD075VRXFA Troubleshooting122 pg
Covers this model

Tech Sheet

LG Samsung RD075VRXFA Product Specification50 pg
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LG Samsung AVXWNH072CE ND052CHXCB ND072CHXCB Product Specification54 pg
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Wiring Diagram

LG Samsung RD075VRXFA Wiring Diagram16 pg
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PCB Diagram36 pg
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Other

LG Samsung RD075VRXFA Precaution2 pg
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E121 on my Samsung RD075VRXFA

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Indoor room temperature sensor

From Service Manual 715513, p.45:

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

E121Indoor room temperature sensor open/short error due to connector dislocation…E122Indoor heat exchanger EVAP IN sensor open/short error due to connector…E123Indoor heat exchanger EVAP OUT sensor open/short error due to connector…E128Indoor heat exchanger EVAP IN sensor dislocation error E129Indoor heat exchanger EVAP OUT sensor dislocation error E130Simultaneous indoor heat exchanger EVAP IN and OUT sensor dislocation error.E135Indoor clean fan rotational frequency feedback error.E1512nd opening error of indoor electrically operated valve (EEV).E1522nd closing error of indoor electrically operated valve (EEV).E153Indoor floating sensor error E154Indoor fan motor operational error E161Mixed operation error E162EEPROM error E163Indoor unit remote controller option input is wrong or not entered.E170Mixed use of Fahrenheit/Celsius setup error E185Power input error into indoor unit communication line E186Clean Unit (SPi) feedback error.E201Communication error between indoor and outdoor units after completing initial…E202Communication error among all indoor units.E203Communication error between main and sub outdoor units or between main and sub…E221Outdoor unit temperature sensor open/short error (over 4.9V or below 0.4V).E226Outdoor temperature sensor dislocation error.E231COND OUT main temperature sensor open/short error (over 4.9V or below 0.4V).E241Outdoor COND OUT temperature sensor dislocation error.E246Outdoor COND OUT temperature sensor dislocation error (RD040/050 model).E251Digital compressor discharge temperature sensor open/short error (over 4.95V or…E257Fixed scroll compressor 2 discharge temperature sensor open/short error (over…E258Fixed scroll compressor 3 discharge temperature sensor open/short error (over…E261Digital compressor discharge temperature sensor dislocation error.E263Fixed scroll compressor 2 discharge temperature sensor dislocation error.

View all 68 error codes

E264Fixed scroll compressor 3 discharge temperature sensor dislocation error.E265SUMP sensor dislocation error E269SUCTION sensor dislocation error.E271SUMP temperature digital sensor open/short error (over 4.95V or below 0.5V…E291High pressure sensor open/short error (short below 0.4V, open over 4.2V).E296Low pressure sensor open/short error (short below 0.4V, open over 4.2V).E307Oil balance valve temperature sensor open/short error E308Suction temperature sensor open/short error E311Liquid pipe (double pipe) temperature sensor open/short error E312Main cooling solenoid valve open error.E320OLP sensor open/short error.E321EVI IN temperature sensor open/short error E322EVI OUT temperature sensor open/short error E403Freezing control causes compressor down E407Compressor down due to high pressure sensor protection control (high pressure…E410Compressor down due to low pressure sensor protection control (below 0.25MPa…E413Protection control by SUMP sensor E416Compressor down due to discharge temperature exceeding 275°F/135°C (or 110°C on…E425Reverse phase or phase fail detection error E428Compressor down due to compression ratio control E431Oil balance valve 1 (balance keeping valve) self-diagnosis error E438EVI EEV opening error.E440Prohibit heating operation for outdoor temperature over 86°F/30°C.E442Prohibit refrigerant filling mode for outdoor temperature over 59°F/15°C.E443High pressure below average before cooling E452Instant blackout error or outdoor unit power frequency error.E453Error by high temperature in outdoor fan motor E454Outdoor fan RPM error E456Outdoor fan over voltage error E457Outdoor fan counter rotation error E458Over voltage detected in compressor current (CT) sensor E461Low voltage detected in compressor current (CT) sensor E462Current protection control causes compressor down E463OLP protection control causes compressor down E475Electrical malfunctions of the outdoor machine E477Liquid compressor protection control E7021st close indoor electrically operated valve error.E7031st 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
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: Take out the batteries of the remote control.","Step 2: Press both temperature buttons…

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