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Error code reference

Samsung Refrigerator Error Code L↔M COMMUNICATION ERROR

Communication error between MAIN MICOM and LOAD (SUB) MICOM; LED panel repeats ALL ON for 0.5 second and ALL OFF for 1.5 seconds with buzzer alarm when communication is interrupted for more than 10 seconds.

SourceSamsung Refrigerator - Troubleshooting: Test Mode & Forced Defrost Functions (RM255AB/RM257AC)p. 34-35

Samsung codesSamsung refrigerator codes
Diagnostic procedure

The full L↔M COMMUNICATION ERROR procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Realistically it is recommended to recheck the status after replacing the Main/Panel PCB (oscilloscope needed for full inspection).

SourceSamsung Refrigerator - Troubleshooting: Test Mode & Forced Defrost Functions (RM255AB/RM257AC)p. 34-35

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More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented

1 manual in the MyPros+ library documents this code for Samsung refrigerator.

Models covered by the manuals that document this code

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