Samsung Air Conditioner Error Code E468

Error code E468 on a Samsung air conditioner indicates a compressor low current fault. The control board monitors compressor current draw through a current transformer (CT) sensor. Under normal operation, a running compressor draws current within an expected range. When the CT sensor registers a value that remains above 4 amperes for more than 10 consecutive minutes without the expected load pattern, the system interprets this as an abnormal condition and triggers E468. This sustained low-current reading points to one of three root causes: a mechanical compressor failure, a defective CT sensor providing inaccurate readings, or an overload protector (OLP) trip that has interrupted the compressor circuit.

The CT sensor is a non-contact current measurement device that clamps around the compressor wiring to read amperage inductively. If the sensor itself is faulty, its output can be erratic or stuck at an incorrect value, causing a false fault. An OLP trip is a thermal or current-based safety device built into or mounted on the compressor that opens the circuit when the compressor overheats or draws unsafe current, effectively cutting compressor operation while the CT sensor continues to register residual or phantom current readings.

Diagnosis should begin at the CT sensor connector, checking resistance values against the rated specification to confirm the sensor is functioning within tolerance. If the sensor checks out, the next step is to inspect the OLP for continuity and check whether the compressor itself has sustained internal damage. A compressor that has seized or lost efficiency may produce current signatures that fall outside normal operating parameters, confirming mechanical failure.