SMA SB 3300TL Installation - Manual (Page 35)

SMA Technologie AG Exchanging Varistors
Installation Guide SB3300TL-11:SE2006 Page 35
If you have found neither a ground fault nor a defective varistor there is probably a
fault in the Sunny Boy 3300TL. Please contact the SMA hotline in this case to discuss
further proceedings.
9. If no replacement varistors are available on site
the Sunny Boy 3300TL can also be operated
without them for a limited period of time. To this
end remove the varistors you have found to be
defective and equip the terminals with a wire
jumper between terminals 2 and 3 instead. The
Sunny Boy 3300TL is then not protected against
surge voltages!
For a limited period of time a defective
varistor can be replaced by a wire
between terminal 2 and 3.
The input port thus modified is no longer protected against surge
voltages! Equip the inverter with varistors again as soon as possib-
le. The Sunny Boy 3300TL should not be operated without varistors
in plants where is a high risk of surge voltages!
10. Reconnect the PE plug to the lid and close the
Sunny Boy 3300TL again.
11. Connect the faultless string of the PV panel.
12. Switch on the circuit breaker.
13. Check whether the LEDs of the Sunny Boy
3300TL show trouble-free operation.
1 2 3
+ -
On!
Off