Error code reference

Samsung Heat Pump Error Code E4

Setting error of option switch in indoor unit - wired remote controller address different from RMC address of indoor unit.

SourceSamsung Heat Pump - Service Manual: Troubleshooting Guide (AVMBH020CA0XAG)p. 182, 203

Samsung codes Samsung heat pump codes

Diagnostic procedure

The full E4 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

First diagnostic step

Check SW03 settings; verify wired remote controller address matches indoor unit RMC address; reset both to '1' if needed.

SourceSamsung Heat Pump - Service Manual: Troubleshooting Guide (AVMBH020CA0XAG)p. 182, 203

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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

9 manuals in the MyPros+ library document this code for Samsung heat pump.

Models covered by the manuals that document this code

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The full E4 procedure

Where this code is documented

Models covered by the manuals that document this code

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