Error code reference

Samsung Heat Pump Error Code E557

Detection of floating switch of indoor unit drain pump (2nd detection)

Detection of floating switch of indoor unit drain pump (2nd detection) - water level rise in drain plate, more severe detection.

First step from the service manual

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

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

MyPros+ Max

$29/month · Cancel anytime · Or $9.95 3-day pass

M+

M+ Max·Samsung Heat Pump

E557 on my Samsung Heat Pump

M+

Detection of floating switch of indoor unit

From Service Manual 322120, p.12:

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

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

78,000+ service manuals · 160,000+ error codes · 55+ brands

$29/month · Cancel anytime · Or $9.95 3-day pass