Maintenance - Sungrow SG33CX User Manual

User Manual
Fault
Description
code
String x reverse
564-571
connection alarm
String
580-587
current anomaly

9.2 Maintenance

Risk of inverter damage or personal injury due to incorrect service!
Always keep in mind that the inverter is powered by dual sources: PV
strings and utility grid.
Before any service work, observe the following procedure.
 Disconnect the AC circuit breaker and then set the DC load-break switch
of the inverter to OFF;
 Wait at least 10 minutes for inner capacitors to discharge completely;
 Verify that there is no voltage or current before pulling any connector.
Keep non-related persons away!
A temporary warning sign or barrier must be posted to keep non-related
persons away while performing electrical connection and service work.
Check method
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
corresponding to string 17 to string 24
respectively.
1. Check whether the corresponding module
is sheltered. If so, remove the shelter and
ensure module cleanness.
2. Check the module for abnormal aging.
x output
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The code 580 and 587 are corresponding to
string 17 and string 24 respectively.
9 Troubleshooting and Maintenance
code 564 to code 571 are
77