Error code reference

Samsung Heat Pump Error Code E117

Forbid operation by low pressure

Forbid operation by low pressure - low pressure sensor value below 3.1 kg/cm2G during cooling or below 2.6 kg/cm2G during heating before pump down start for 3 consecutive seconds.

First step from the service manual

Measure the pressure using the Manifold Gauge when the system is stopped.

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

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

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E117 on my Samsung Heat Pump

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Forbid operation by low pressure - low pressure

From Service Manual 326088, p.20:

1.Measure the pressure using the Manifold Gauge when the system is stopped.

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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First step from the service manual

Get the full diagnostic procedure for E117.

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