SUNFLX SEI -4K-SP - Page 48

49
If you encounter a fault with the product that cannot be solved by the methods in the table
above, please contact our after-sales service for technical support and do not disassemble
the equipment yourself.。
【42】
Inconsistent system
firmware version in
parallel mode
Check whether the software version of each
inverter is consistent.
【44】
Serial number error
Incorrect device serial number setting.
【45】
Parallel mode error
There is a device in the parallel system with the
wrong parallel mode setting.
【49】
High grid voltage
Check that the grid voltage is within the normal
range, if the grid voltage is abnormal, wait until
the grid voltage is restored.
【50】
Low grid voltage
Check that the grid voltage is within the normal
range, if the grid voltage is abnormal, wait until
the grid voltage is restored.
【51】
High grid frequency
Check that the grid frequency is within the
normal range, if the grid frequency is abnormal,
wait until the grid frequency is restored.
【52】
Low grid frequency
Check that the grid frequency is within the
normal range, if the grid frequency is abnormal,
wait until the grid frequency is restored.
【53】
Grid unconnected
Check if the grid is correctly connected, e.g. if
the switch is closed and if the grid is
disconnected.
【54】
Grid-connected current
with DC component over
Power down and restart the device, if it
continues to report faults, contact the
manufacturer after sales.
【56】
Low insulation resistance
fault
Check that the system is well grounded and that
the PV modules and cables are not worn.
【57】
Leakage current overload
fault
Check that the system is well grounded and that
the loads are not operating abnormally.