For troubleshooting PV, utility, and load faults in the HP-AHP20SA series, a structured approach is advised:

PV Faults: Include over-temperature and voltage irregularities. Initial steps involve checking the installation environment, and system configuration, verifying voltage levels, and resetting the inverter/charger. Contacting support is recommended for unresolved issues.

Utility Faults: Tackle problems like over voltage, over current, and frequency errors. The process usually involves verifying utility voltage, load power, and a systematic restart of the system.

Load Faults: Address issues such as load current offset and overload. The common resolution involves disconnecting the load, restarting the inverter/charger, and seeking technical support if problems persist.

BMS (Battery Management System) Faults: Entail checking communication status and settings, particularly for faults like charge disable, over-voltage, and temperature errors.

In all cases, a methodical check and reset routine is key, with technical support as a fallback for complex issues.