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Error code reference

Samsung Heat Pump Error Code E556

Detection of floating switch of indoor unit drain pump (1st detection) - water level rise in drain plate due to drain pump failure or detection sensor defect.

SourceSamsung Heat Pump - Service Manual: Troubleshooting (RVXVHT140GC)p. 12-20

Samsung codesSamsung heat pump codes
Diagnostic procedure

The full E556 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 if the indoor unit is cassette type; if so, check float switch resistance (should be OPEN when connector removed).

SourceSamsung Heat Pump - Service Manual: Troubleshooting (RVXVHT140GC)p. 12-20

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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

2 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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