mypros+
Error code reference

Samsung Refrigerator Error Code P↔M COMMUNICATION ERROR

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

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

Samsung codesSamsung refrigerator codes
Diagnostic procedure

The full P↔M COMMUNICATION ERROR procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
After separating Main PCB CN76 wire from the PCB, check resistance between orange ↔ black color to see if it is between 15 and 40Ω; check for heater short circuit if 0Ω or wire cut if ∞Ω.

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