Issue:

An alarm with code F120 accompanied by loud beeping was reported on a solar canopy inverter model HIS-SC-010.

Cause:

information not provided in the case

Resolution:

1. Log in to the inverter system interface.
2. Perform a remote test using the inverter interface.
3. If the alarm persists, check the inverter model number.
4. Apply the latest firmware update (e.g., firmware version FB-772) to the inverter.
5. Confirm that the inverter is operating normally and that the alarm has cleared.