Error code reference

Samsung Heat Pump Error Code E468

Digital compressor loading failure or OLP trip detected

Digital compressor loading failure or OLP trip detected - no change in temperature and pressure despite compressor operation.

First step from the service manual

Check resistance between compressor terminals; if abnormal, wait for compressor to cool (OLP trip); if normal, check high/low pressure.

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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E468 on my Samsung Heat Pump

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Digital compressor loading failure or OLP trip

From Service Manual 323049, p.21:

1.Check resistance between compressor terminals; if abnormal, wait for compressor to cool (OLP trip); if normal, check high/low pressure.

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 E468.

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