System Manual
11 Troubleshooting
83
Alarm
Branch breaker flt
Possible
reason
Circuit breaker of the branch on the DC side is abnormal and this branch cannot
work normally
Measure
Check the abnormal circuit breaker when the MV Station is voltage-free
Remark
Before device stops, the non-abnormal branches can work normally and the MV
Station can operate in grid-connection normally
11.5
Other Faults
Fault
The MV Station shuts down shortly after start-up
Possible
reason
DC input voltage just reaches the MV Station start-up voltage. Voltage will
decrease and the MV Station will stop when it is under load.
Measure
Design the serial and parallel connection in accordance with the open circuit
voltage; increase the input DC voltage; avoid adopting the critical voltage
Remark
-
Fault
LCD Display Cannot Start or Stop the MV Station
Possible
reason
Communication malfunction between the LCD display and the DSP; LCD power
supply malfunction
Measure
Check the connection between the LCD display and the DSP when the MV
Station is voltage-free
Remark
-
Fault
Communication Failure with PC
Possible
reason
Possible reasons are various. Please refer to the Measure for troubleshooting
Measure
Check if the address and the Baud rate of the LCD are the same with that of
PC
Check to ensure the circuits are properly connected and if the RS485
communication is adopted, the A and B ports are connected correctly
Check if the communication converters are matched. Communicate again
after replacing the converter
The monitor disk is installed incorrectly. It is recommended to reinstall the
disk
If all the above-mentioned items are correct and this fault continues, please
replace the PC communication module on the LCD display
Remark
The monitor disk might be incompatible with the antivirus software and thus
cannot be installed correctly. You are recommended to disable the antivirus
software and then install the monitor software.
If the fault still occurs, please contact Sungrow
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