Samsung Air Conditioner Error Code E573

E573 indicates that a single-type outdoor unit has been detected in a system configured for module installation. Samsung module systems require specific modular outdoor units that support inter-unit communication and capacity staging. This error is triggered when the control system identifies a mismatch between the installed outdoor unit type and the expected system architecture. It is a configuration or installation error, not a mechanical failure.

The system will generally prevent normal operation when E573 is active, which is intentional. Running an incompatible outdoor unit in a module installation could cause control conflicts or improper capacity management. Do not attempt to bypass the error. Have the installation reviewed by a qualified technician before resuming operation.

A simple power reset will not permanently clear E573 because the error is caused by an underlying hardware or configuration mismatch that persists across restarts. The control system will re-detect the incompatible outdoor unit type and re-trigger the fault. The root cause, either the wrong outdoor unit being installed or an incorrect system configuration setting, must be corrected before the error will clear.

This error is not a typical homeowner repair. It involves system-level configuration and potentially replacing the outdoor unit with the correct modular type. A qualified HVAC technician with experience in Samsung multi-zone or VRF systems should diagnose the installation and determine whether the issue is a configuration setting or a hardware mismatch.

If the issue is only a configuration setting in the control board or service menu, costs are limited to a service call, typically in the range of $75 to $200 depending on location. If the outdoor unit itself needs to be replaced with the correct modular model, costs can range from several hundred to several thousand dollars depending on the unit capacity and installation complexity.