Samsung Air Conditioner Error Code E572

E572 indicates an inverter zero crossing error. The inverter module uses zero crossing detection to synchronize compressor motor control, and when this signal is lost or undetectable, the system faults and shuts down. The error points to a problem in the inverter PCB circuit, the power supply, or the wiring connecting those components.

Power cycling the unit may temporarily clear the fault display, but E572 will return if the underlying cause is not resolved. If the error comes back immediately or within a short period of operation, the inverter board or a related component requires diagnosis and repair. A reset alone is not a fix for this error code.

Repair costs vary depending on the root cause. If the fix involves reseating wiring connections or addressing a power supply issue, costs may be limited to a service call fee, typically in the range of $75 to $150. If the inverter PCB requires replacement, parts and labor combined can range from $300 to $700 or more depending on the unit model and local labor rates. A compressor replacement, if that is the source, would be significantly more expensive.

Diagnosing E572 involves working with high-voltage inverter circuitry, which carries serious shock risks and should only be handled by a qualified technician. A knowledgeable DIYer may be able to inspect wiring connections and verify line voltage at the disconnect, but replacing or repairing the inverter board requires proper training and safety equipment. Most repairs for this code will require a professional service call.

The system is designed to shut down when E572 is detected to protect the inverter and compressor from damage caused by uncontrolled motor operation. Attempting to force the unit to run while this fault is active could cause additional damage to the inverter board or compressor. It is best to leave the unit off until the fault is properly diagnosed and repaired.