117
Fault Code Fault Name Corrective Measures
1600 - 1615,
1632 - 1655
PV Grounding
Fault
1. When the fault occurs, it is forbidden to directly
disconnect the DC switch and unplug PV termi-
nals 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 inver-
ter 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
value
Check whether the open-circuit voltage of the PV
module connected to the optimizer exceeds the
maximum input voltage allowed by the optimizer.
512
Hardware
fault
A hardware
fault occurs
to the
optimizer
Please contact Sungrow Customer Service.
1024
Update
failed
The opti-
mizer soft-
ware fails
to upgrade
1. The software upgrade may take more than 20
minutes for a large-scale system with a great
number of optimizers. Please check the light con-
dition, and perform the software upgrade under
good light conditions.
2. If the fault persists, please contact Sungrow
Customer Service.
User Manual 9 Troubleshooting and Maintenance
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