Table of Contents
1 Information on this Document ................................................. 4
2 Safety......................................................................................... 6
2.1 Skills of Qualified Persons .................................................................. 6
2.2 Safety Precautions............................................................................... 6
3 Disconnecting the Inverter from Voltage Sources.................. 8
4 Cleaning the Inverter................................................................ 10
5 Checking the PV System for Ground Faults............................ 11
6 Checking the Function of the Varistors.................................... 14
7 Replacing the Varistors ............................................................ 16
8 Cleaning the Fans ..................................................................... 17
9 Checking the Function of the Fans........................................... 19
10 Troubleshooting ........................................................................ 20
10.1 LED Signals.......................................................................................... 20
10.2 Error Messages ................................................................................... 21
10.3 Event Messages................................................................................... 27
11 Recommissioning the Inverter.................................................. 28
12 Decommissioning the Inverter ................................................. 30
13 Spare Parts................................................................................ 33
14 Contact....................................................................................... 34
Table of Contents
SMA Solar Technology AG
Service Manual 3STP5-12TL-20-SG-en-12