At firealarm.com, we understand the frustration of dealing with system malfunctions. When troubleshooting the Notifier FS-OSI-RI, begin by checking the power supply to ensure it’s functioning correctly. Next, inspect all wiring connections for any signs of damage or loose connections. If the issue persists, consult the system’s manual for error code interpretations and further troubleshooting steps. Additionally, reaching out to Notifier’s technical support team can provide specialized assistance tailored to your specific problem.