95
Fault Code Fault Name Corrective Measures
17
Grid Voltage
Imbalance
Generally, the inverter will be reconnected to the
grid after the grid returns to normal. If the fault oc-
curs 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 imbalance pa-
rameter through the App or the LCD.
3. Contact Sungrow Customer Service if the pre-
ceding causes are ruled out and the fault persists.
28, 29, 208,
212, 448-479
PV Reserve Con-
nection Fault
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 pre-
ceding 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 corresponding to
string 1 to string 32 respectively.
532-547, 564-
579
PV Reverse Con-
nection Alarm
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 pre-
ceding causes are ruled out and the alarm
persists.
*The code 532 to code 547 are corresponding to
string 1 to string 16 respectively.
*The code 564 to code 579 are corresponding to
string 17 to string 32 respectively.
User Manual 9 Troubleshooting and Maintenance
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