87
Fault code
Fault name
Corrective measures
1548-1579
String Current
Reflux
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
current drops below 0.5 A. If so, check the wiring
and configuration of the PV module,
4. Check whether the orientation of the PV mod-
ule 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 termi-
nals when the direct current is greater than 0.5A;
2. Wait until the direct current of the inverter falls
below 0.5A, 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 reasons 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 0.5A when
the fault occurs.
2. Disconnect the DC switch only when the inver-
ter DC side current drops below 0.5A.
3. It is prohibited to power up the inverter again.
Please contact Sungrow Customer Service.
User Manual
Summary of Contents for SG250HX-US
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