Error code reference

Samsung Air Conditioner Error Code E425

Reverse phase of 3-phase power - phase order reversed or one or more phase voltages not present at 3-phase detection circuit.

SourceSamsung Air Conditioner - Service Manual: Troubleshooting (AVMWH020CA0XAG)p. 6-78

Diagnostic procedure

The full E425 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
Check main voltage at CN82 power cable (red-white, white-black, red-black) for approximately AC 380V.

SourceSamsung Air Conditioner - Service Manual: Troubleshooting (AVMWH020CA0XAG)p. 6-78

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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