(e.g., beeping, not turning on, not switching to backup)

If you can also tell me , I can help you find the right troubleshooting step from the manual. Microtek Sinewave Inverter Manual | PDF - Scribd

are flashing or on, or what codes appear on the screen?

Service manuals highlight specific indicators and beep codes to diagnose issues:

Must be installed in a well-ventilated area, protected from water, heat sources, and direct sunlight.

Displays fault codes like "HI" (Voltage High), "Lo" (Voltage Low), "OP" (Overload), or "SC" (Short Circuit). Installation & Maintenance

Uses advanced digital signal processing for precise control of power output and battery charging.

Features automatic reset, but requires manual intervention if faults persist. Troubleshooting & Service Codes