Sungrow SG8K-D - Troubleshooting and Maintenance; Routine Maintenance

8 Troubleshooting and Maintenance User Manual
60
Code
Description
Troubleshooting
503
Ambient temperature
sensor
open circuit
warning.
504
Ambient temperature
sensor
short circuit
warning.
505
Radiator temperature
sensor
open circuit
warning.
506
Radiator temperature
sensor
short circuit
warning.
501
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 Service Dept.
514
Abnormal
communication
warning of the
Sungrow 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.
8.2 Routine 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 if 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.