9 Troubleshooting and Maintenance
User Manual
76
Fault
code
Description
Check method
220~227
PVx abnormal
1. Check if the xth PV string needs to be
connected.
If not, ignore the alarm; and
If so, check the connection status and make
sure it is connected reliably.
2. Check if the xth DC fuse is damaged. If so,
replace the fuse.
3.If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The
code
220
to
code
227
are
corresponding to PV 5 to PV 12 respectively.
448~471
String x reverse
connection fault
1. Check whether the corresponding string is
of reverse polarity. If so, disconnect the DC
switch and adjust the polarity when the solar
radiation is low and the string current drops
below 0.5A.
2. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The
code
448
to
code
471
are
corresponding to string 1 to string 24
respectively.
532-547
String x reverse
connection alarm
1. Check whether the corresponding string is
of reverse polarity. If so, disconnect the DC
switch and adjust the polarity when the solar
radiation is low and the string current drops
below 0.5A.
2. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The
code
532
to
code
547
are
corresponding to string 1 to string 16
respectively.
548-563
String
x
output
current anomaly
1. Check whether the corresponding module
is sheltered. If so, remove the shelter and
ensure module cleanness.
2. Check the module for abnormal aging.
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The
code
548
to
code
563
are
corresponding to string 1 to string 16
respectively.
