Error code reference

Samsung Heat Pump Error Code E161

Loading failure of digital compressor or OLP trip detected when temperature and pressure conditions indicate…

Loading failure of digital compressor or OLP trip detected when temperature and pressure conditions indicate no compression is occurring.

First step from the service manual

Check resistance between compressor terminals L1(R)-L2(S), L2(S)-L3(T), L3(T)-L1(R); if abnormal, wait for compressor to cool (OLP trip).

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
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E161 on my Samsung Heat Pump

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Loading failure of digital compressor or OLP

From Service Manual 325939, p.31:

1.Check resistance between compressor terminals L1(R)-L2(S), L2(S)-L3(T), L3(T)-L1(R); if abnormal, wait for compressor to cool (OLP trip).

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part DA92-00384N

Main PCB assembly

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First step from the service manual

Get the full diagnostic procedure for E161.

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