Sma SB 6000TL‑US Installation User Manual download pdf (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

AAC 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

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 91 92

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Sma SB 6000TL‑US Installation User Manual Page 67