Sungrow SG1K5TL-31, User Manual

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Troubleshooting
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7.2
Troubleshooting of Faults in LCD Screen
Type of fault Troubleshooting
Vdc-high 1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to the “OFF” position.
3. Check the voltage of DC side.
4. Restart the inverter until the DC voltage returns to the allowable range.
Vac-low 1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to the “OFF” position.
3. Check the voltage of grid side.
4. If local grid condition exceeds AC requirements of inverter, reset the
protecting parameters. See “8.8.6 Protective Parameters Settings”.
And if local grid voltage exceeds the upper limit value of “Vgrid-max”, or
if local grid voltage is under the lower limit value of “Vgrid-min”, please
contact your local electricity company to adjust the grid voltage.
5. Rotate the DC switch to the “ON” position
6. Close AC circuit breaker to restart the inverter.
7. If the fault still exists, please contact with Sungrow.
Vac-high
F-fault 1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to the “OFF” position.
3. Check the frequency of grid side.
4. If local grid condition exceeds AC demands of inverter, reset the
protective parameters. See “8.8.6 Protective Parameters Settings”.
And if local grid frequency exceeds the upper limit value of “Fgrid-max”,
or if local grid frequency is under the lower limit value of “Vgrid-min”,
please contact your local electricity company to adjust the grid frequency.
5. Rotate the DC switch to the “ON” position
6. Close AC circuit breaker to restart the inverter.
7. If the fault can not be solved, please contact with Sungrow.
PM-fault If this malfunction occurs, the reasons are very complicated.
1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to the “OFF” position.
3. Check the inner temperature of the inverter and wait for cooling down.
4. Rotate the DC switch to the “ON” position
5. Close AC circuit breaker to restart the inverter.
6. If this malfunction happens again, please contact with Sungrow.