Other Faults - Sungrow SG1250UD Operation Manual

Operation Manual
T&H-com-flt
Alarm
Possible If the inverter is equipped with heating and dehumidification function and the
communication between the temperature & humidity board and the device is
reason
poor, this alarm occurs
Measure Contact Sungrow
The operation LED is green.
Remark
10.5

Other Faults

Fault
Inverter shuts down shortly after start-up
Possible
DC input voltage just reaches the inverter start-up voltage. The voltage will
reason decrease and inverter 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 Inverter
Possible
Communication malfunction between the LCD display and the DSP; LCD power
reason supply malfunction
Measure Check the connection between the LCD display and the DSP when inverter is
voltage-free
Remark -
Fault
Communication Failure with PC
Possible
Possible reasons are various. Please refer to the Measure for troubleshooting
reason
 Check if the address and the Baud rate of the LCD are the same with that of
Measure
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
10. Troubleshooting
61