Maintenance - Sungrow SG5KTL-MT User Manual

User Manual
D D e e s s c c r r i i p p t t i i o o n n
A A l l a a r r m m I I D D
String x reverse
532-535
connection
Abnormal PV string
548-551
current

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.
9 Troubleshooting and Maintenance
C C o o r r r r e e c c t t i i v v e e M M e e a a s s u u r r e e s s
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 persists, contact SUNGROW.
*The ID 532 to ID 535 is corresponding to
string 1 to string 4 respectively.
1. Check whether there is PV module shaded.
If so, remove the shade and ensure the PV
module is clean.
2. Check the whether the PV module is in
abnormal aging.
3. If the alarm persists, contact SUNGROW.
*The alarm ID 548 to ID 551 is corresponding
to string 1 to string 4, if necessary, respectively.
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