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4.22. Fault Codes
To check fault codes click on the “Fault Codes” icon on the settings menu.
If any of the fault messages listed in the following table appear on your inverter and the fault has not been
removed after restarting, please contact your local vendor or service center. The following information is
required:
1. Inverter serial number.
2. Distributor or service center of the inverter.
3. On-grid power generation date.
4. The problem description (including the fault code and indicator status displayed on the LCD) is as
detailed as possible.
5. Your contact information.
Error Code
Description
Solutions
F13
Working Mode Change
Inverter work mode changed
1. Reset the inverter.
2. Seek help from Sunsynk.
F18
AC over current fault or hardware
AC Slide over current fault.
1. Check if the backup load power is
within the range of the inverter.
2. Restart, and check if it is normal.
F20
DC over current fault of the hardware
DC Over current fault
1. Check if PV module and battery
connections.
2. Reset the system.
F23
AC leakage current is trans over
current
Leakage current fault
1. Check the PV module and inverter
cables.
