Sungrow SG1250UD - Page 5

III
7.2 Running Parameters ................................................................................. 30
7.3 Protection Parameter ................................................................................ 34
8 Inverter Functions .................................................................. 39
8.1 Perfect Control Strategy ............................................................................ 39
8.2 Active Power Limitation ............................................................................. 39
8.2.1 Active Power Limitation Introduction ................................................. 39
8.2.2 How to Realize Power Limitation ...................................................... 40
8.3 Reactive Power Adjustment ...................................................................... 40
8.4 Low Voltage Ride Through ........................................................................ 41
8.5 High Voltage Ride Through ....................................................................... 42
8.6 Over-frequency Derating Function ............................................................ 43
8.7 Temperature Derating ................................................................................ 43
8.8 Maximum Power Point Tracking ................................................................ 44
8.9 Intelligent Temperature-Control Technology .............................................. 45
8.10 Anti-PID Effect Function (Optional) ................................................. 45
8.10.1 Introduction to PID Effect ................................................................ 45
8.10.2 PID Power Supply Mode Function Setting ...................................... 45
8.10.3 PID Repair ....................................................................................... 46
8.11 Insulation Monitoring Function......................................................... 46
8.11.1 Introduction ..................................................................................... 46
8.11.2 Simple Troubleshooting .................................................................. 46
8.12 Grid Self-Establishment and Debugging ......................................... 47
8.13 Deep Standby Function ................................................................... 47
8.14 Protection Function .......................................................................... 47
9 Routine Maintenance .............................................................. 50
9.1 Safety Instructions ..................................................................................... 50
9.1.1 Safety Rules ...................................................................................... 50
9.1.2 Five Safety Rules .............................................................................. 50
9.2 Maintenance and Interval .......................................................................... 50
9.3 Filter Checking and Cleaning .................................................................... 52
9.4 Replacement of the Electrical Components .............................................. 53
10 Troubleshooting...................................................................... 54
10.1 Fault Checking ................................................................................. 54
10.2 Fault and Troubleshooting of LED ................................................... 55
10.3 Fault and Troubleshooting on the LCD screen ................................ 55
10.4 LCD Display Alarm Information and Troubleshooting ..................... 58
10.5 Other Faults ..................................................................................... 61