User Manual 9 Troubleshooting and Maintenance
77
External memory
reading/writing
warning.
1. Inverter can normally be connected to the
grid.
2. Power on the inverter again. If the fault
persists, contact SUNGROW.
Abnormal
communication
warning of the Energy
Meter.
(Inverter can be
normally connected to
the grid.)
1. Check whether the power cable
connections of the meter are correct.
2. Check whether the RS485 connection is
correct.
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.
Restart the inverter only after removing the fault that impairs safety
performance.
As the inverter contains no component parts that can be maintained,
never arbitrarily replace any internal components.
For any maintenance need, please contact SUNGROW. Otherwise,
SUNGROW shall not be held liable for any damage caused.
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