Samsung Air Conditioner Error Code E361

Error code E361 on a Samsung air conditioner indicates an operation failure of inverter compressor 2. This code applies to multi-zone or dual-compressor systems where a second inverter-driven compressor is responsible for handling part of the cooling or heating load. The inverter compressor uses variable-speed drive technology to modulate capacity, and when the control board detects that this compressor is not operating within expected parameters, such as failing to start, running outside its normal speed range, or drawing abnormal current, it triggers E361 and shuts down the affected circuit to prevent damage.

The failure can originate in several places: the compressor motor windings themselves, the inverter PCB (also called the inverter board or power module) that drives the compressor, the refrigerant circuit connected to compressor 2, or wiring and connectors between the control system and the inverter board. An inverter compressor that has developed a winding short or open circuit will cause the drive board to detect an abnormal load and flag the error. Similarly, a faulty inverter PCB that cannot generate the correct three-phase output to spin the compressor motor will produce the same result.

Diagnosing E361 requires checking the compressor 2 winding resistances for shorts or opens, inspecting the inverter PCB for burned components or failed capacitors, verifying DC bus voltage from the power supply stage, and checking all wiring harnesses for continuity and secure connections. Refrigerant issues such as a loss of charge or a restriction can also cause abnormal compressor load, so system pressures should be evaluated as part of the diagnostic process. This repair typically requires a licensed HVAC technician due to the high-voltage components and refrigerant handling involved.