Sungrow SG110CX - Page 115

9 Troubleshooting and Maintenance User Manual
Fault Code Fault Name Corrective Measures
1548-1579
String Current Re
flux
1. Check whether the number of PV modules of
the corresponding string is less than other strings.
If so, disconnect the DC switch and adjust the PV
module configuration when the string current drops
below 0.5 A.
2. Check whether the PV module is shaded;
3. Disconnect the DC switch to check whether the
open circuit voltage is normal when the string cur
rent drops below 0.5 A. If so, check the wiring and
configuration of the PV module,
4. Check whether the orientation of the PV module
is abnormal.
1600 - 1615,
1632 - 1655
PV Grounding
Fault
1. When the fault occurs, it is forbidden to directly
disconnect the DC switch and unplug PV terminals
when the direct current is greater than 0.5 A;
2. Wait until the direct current of the inverter falls
below 0.5 A, then disconnect the DC switch and
unplug the faulty strings;
3. Do not reinsert the faulty strings before the
grounding fault is cleared;
4. If the fault is not caused by the foregoing rea
sons and still exists, contact Sungrow Customer
Service.
1616
System Hardware
Fault
1. It is prohibited to disconnect the DC switch when
the DC current is greater than 0.5 A when the fault
occurs.
2. Disconnect the DC switch only when the inverter
DC side current drops below 0.5 A.
3. It is prohibited to power up the inverter again.
Please contact Sungrow Customer Service.
Once a fault occurs to the optimizer, the fault information is displayed on the App.
Fault
Code
Fault
Name
Possible
Cause
Corrective Method
4
Input
overvolt
age
The PV
voltage is
higher than
the set pro
tection val
ue
Check whether the open-circuit voltage of the PV
module connected to the optimizer exceeds the
maximum input voltage allowed by the optimizer.
106