SMA SUNNY BOY 1300TL - Checking the Function of the Varistors

SMA Solar Technology AG 10 Troubleshooting
Installation Manual SB13_21TL-IA-en-65 55
3. Restart the inverter (see Section 9).
10.5.2 Checking the Function of the Varistors
Figure14: Varistors inside the inverter
Example: Location of the earth fault
The example shows an earth fault between the second and third PV modules.
Item Description
A Upper connection wire
B Middle connection wire
C Lower connection wire with loop