Certainly! When dealing with an error code on the Vesda VSP-990-330, the first step is to reference the unit’s manual to identify the specific code being displayed. Once you have the code, check if it’s a known issue listed in the troubleshooting section of the manual. If not, power cycle the unit by turning it off, waiting a few minutes, and then turning it back on. If the error persists, check for any obstructions in the airflow path and ensure that the filters are clean. If the issue persists after these steps, it might be necessary to contact technical support for further assistance.