Samsung Air Conditioner Error Code E462

Samsung E462 is a current protection fault that forces the outdoor unit compressor to shut down when the measured input current exceeds a programmed trip threshold. The outdoor unit's control board continuously monitors compressor operating current through a current sensing circuit. When that current climbs above the preset overcurrent protection limit, the board commands a compressor shutdown to prevent damage to the motor windings, start capacitor, and refrigerant circuit components.

Low supply voltage to the outdoor unit is one of the most common triggers for this fault. When line voltage drops below the acceptable operating range, the compressor draws significantly higher amperage to maintain torque, which can push current readings past the trip threshold even under normal load conditions. This is why the first diagnostic step calls for checking compressor input voltage directly at the outdoor unit terminals. An incorrectly configured overcurrent option setting in the control board parameters can also cause nuisance tripping, where the protection threshold is set too low for the installed compressor model.

Additional causes include a failing compressor with degraded motor windings that draws excessive current under load, a refrigerant charge imbalance that forces the compressor to work harder than its rated operating envelope, and a faulty or weakened compressor start capacitor that results in high inrush current at startup. Diagnosing E462 accurately requires a clamp meter to measure actual operating current, a voltmeter to confirm adequate supply voltage, and access to the control board configuration settings to verify the overcurrent trip parameter is set correctly for the unit.