Error code reference

Samsung Heat Pump Error Code P9

Compressor down due to low pressure sensor protection control (less than 3 kg/cm²G in cooling, 1.5 kg/cm²G in heating before pump down start).

SourceSamsung Heat Pump - Service Manual: Troubleshooting & Error Codes (AVMWH020CA0G)p. 181, 189

Samsung codes Samsung heat pump codes

Diagnostic procedure

The full P9 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 indoor unit fan motor; check EEV operation; check refrigerant charge level.

SourceSamsung Heat Pump - Service Manual: Troubleshooting & Error Codes (AVMWH020CA0G)p. 181, 189

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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 P9 procedure

Where this code is documented

Models covered by the manuals that document this code

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