Sungrow SG30CX User Manual page 88

9 Troubleshooting and Maintenance
F F a a u u l l t t c c o o d d e e
13
17
28, 29, 208,
448-479
78
F F a a u u l l t t n n a a m m e e
Grid Abnormal
Grid Voltage Imbalance
PV Reserve Connection
Fault
C C o o r r r r e e c c t t i i v v e e m m e e a a s s u u r r e e s s
Generally, the inverter will be reconnected
to the grid after the grid returns to normal. If
the fault occurs repeatedly:
1. Measure the actual grid frequency, and
contact the local electric power company
for solutions if the grid parameter exceeds
the set range.
2. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
Generally, the inverter will be reconnected
to the grid after the grid returns to normal. If
the fault occurs repeatedly:
1. Measure the actual grid voltage. If grid
phase voltages differ greatly, contact the
electric power company for solutions.
2. If the voltage difference between phases
is within the permissible range of the local
power company, modify the grid voltage im-
balance parameter through the App or the
LCD.
3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
1. Check whether the corresponding string
is of reverse polarity. If so, disconnect the
DC switch and adjust the polarity when the
string current drops below 0.5 A.
2. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
*The code 28 to code 29 are corresponding
to PV1 to PV2 respectively.
*The code 448 to code 479 are correspond-
ing to string 1 to string 32 respectively.
User Manual