Error code reference

Samsung Heat Pump Error Code E461

Detection of floating switch of indoor unit drain pump (1st detection)

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

First step from the service manual

Check if indoor unit is cassette type; if yes, measure resistance on both sides of plot switch connector after removing from indoor unit PCB.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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E461 on my Samsung Heat Pump

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Detection of floating switch of indoor unit

From Service Manual 323056, p.28:

1.Check if indoor unit is cassette type; if yes, measure resistance on both sides of plot switch connector after removing from indoor unit PCB.

2.Measure drain pump winding resistance at connector J7 on the main control. Expected: 12 to 16 ohms at room temperature.

3.Back-probe the pump driver output under load. Verify the board switches the pump at 120 VAC during the drain portion of the cycle.

Part DC31-00054A

Drain pump motor

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