Samsung Air Conditioner Error Code OUTDOOR_GREEN_RED_ON

The OUTDOOR_GREEN_RED_ON error code on Samsung air conditioners indicates that the system has triggered compressor peak current (overcurrent) protection. This protection circuit monitors the electrical current draw of the compressor in real time. When the current exceeds the safe operating threshold, the outdoor unit control board shuts down the compressor to prevent motor winding damage, capacitor failure, or a tripped breaker. The simultaneous illumination of both the green and red LEDs on the outdoor unit is the visual signal that this protective shutdown has occurred.

Overcurrent conditions at the compressor are almost always caused by one of three underlying problems: mechanical restriction inside the compressor, an abnormal refrigerant charge condition, or inadequate heat exchange at the outdoor unit. A refrigerant overcharge forces the compressor to work against excessive head pressure, dramatically increasing current draw. A refrigerant undercharge can cause liquid slugging under certain operating conditions, also spiking current. A dirty or obstructed condenser coil or a poorly ventilated installation site raises discharge pressure and forces the compressor to draw more current to maintain operation.

Diagnosing this error requires checking the outdoor unit's airflow and ventilation first, then verifying refrigerant pressures with a manifold gauge set, and finally evaluating the compressor itself. A compressor with worn or failing windings will show abnormal resistance readings across its terminals. If the refrigerant charge and ventilation are confirmed to be within spec and the error persists, the compressor should be tested for winding resistance, insulation breakdown, or a seized mechanical assembly before replacement is considered.