SMA SB 6000TL‑US Installation - Manual (Page 67)

SMA America, LLC 9 Maintenance
Installation Manual SB6-11TL-US-IA-en-13 67
9.5.2 AC Varistors
1. Disconnect the Sunny Boy on the AC and DC sides.
2. Wait 5 minutes for the component parts to cool down.
3. Open the DC disconnect as described in Section 8.3 "Opening the DC Disconnect", page 58.
4. Ensure that no voltage is present at the AC varistors (A).
5. Check the AC varistors (A) for discoloration and visible damage.
✖ If one of the AC varistors is discolored or damaged, replace all AC varistors:
– Insert the insertion tool into the rectangular
opening of the terminal (1).
– Remove the AC varistor (2).
– Insert the new AC varistor into the terminals
(3).
– Pull the insertion tool out of the openings of
the terminal contacts.
6. Ensure that all AC varistors in the terminals are securely in place.
7. Close the DC disconnect as described in Section 8.4 "Closing the DC Disconnect", page 59.
☑ Testing and replacement of the AC varistors is completed.
Position Description
A AC varistors
Only use spare parts from SMA
• Always replace the entire set of AC varistors.
• Order number in Section 12 "Spare Parts and Accessories", page 88.
-
+ L1 L2 N
A