SMA Solar Technology AG 10 Troubleshooting
Installation Manual SB13_21TL-IA-en-65 57
10.5.3 Replacing the Varistors
Proceed as follows to replace each varistor.
1. Disconnect the inverter from all voltage sources (see Section 8).
2. Remove all screws from the enclosure lid and pull the enclosure lid evenly forward and off.
3. Remove the protective conductor (PE) connection from the bottom of the enclosure lid.
4. Insert the insertion tool into the contacts of the
terminal block.
5. Remove the varistor from the terminal block.
6. Insert the new varistor into the terminal block.
Remember to insert the connection wire with the
loop into the lower terminal.
7. Remove the insertion tool from the contacts of the terminal block.
8. Restart the inverter (see Section 9).
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