Sungrow SG3425UD - Page 7

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10.9.4 Islanding Protection...........................................................................71
10.9.5 Overload Protection...........................................................................71
10.9.6 Ground Protection .............................................................................71
10.9.7 Module Over-temperature Protection ..................................................71
10.9.8 Internal Over-temperature Protection ..................................................71
11 Troubleshooting ............................................................................................72
11.1 Safety Instructions ......................................................................................72
11.2 Checking Fault ...........................................................................................72
11.3 Fault and Troubleshooting on the Inverter .....................................................73
11.4 Other Fault and Troubleshooting ..................................................................84
12 Routine Maintenance ..................................................................................85
12.1 Overview....................................................................................................85
12.2 Safety Instructions ......................................................................................85
12.3 Maintenance ..............................................................................................86
12.3.1 Overview ..........................................................................................86
12.3.2 Introduction.......................................................................................86
12.3.3 Maintenance Interval .........................................................................86
12.4 Cleaning the Inverter...................................................................................90
12.4.1 Introduction.......................................................................................90
12.4.2 Cleaning Interval ...............................................................................91
12.4.3 Cleaning the Internal Dust..................................................................91
12.4.4 Cleaning the Foundation ....................................................................91
12.4.5 Checking and Cleaning the Air Inlets/outlets........................................91
12.4.6 Cleaning the Surface of the Inverter....................................................92
12.4.7 Checking the Lock and Hinge.............................................................92
12.4.8 Checking the Sealing Strip .................................................................92
12.5 Painting Make-up Measures ........................................................................92
12.6 Replacing the Electrical Components ...........................................................96
12.6.1 Safety Instructions.............................................................................96
12.6.2 Replacing DC Fuses..........................................................................96
13 Appendix .......................................................................................................98
13.1 System Parameters ....................................................................................98
13.2 Tightening Torques .....................................................................................99
13.3 Exclusion of Liability.................................................................................. 100
13.4 Contact Information .................................................................................. 100