SMA WINDY BOY 3300 - Page 60

Troubleshooting SMA Solar Technology AG
60 WB33_38-IEN101830 Installation Guide
3. Insert an insertion tool into the openings of the
terminal contacts (1).
☑ This releases the terminals.
If you did not receive an extractor tool together with
the replacement varistors for the servicing of the
terminals, contact SMA Solar Technology AG. As
an alternative, the individual terminal contacts can
be operated using a 3.5 mm wide screwdriver.
4. Remove the varistor (2).
5. Insert new varistor (3).
The pole with the small loop (crimp) must be fitted
to terminal A when remounting (3).
6. Close the inverter as described in
section7.3”Closing the Inverter” (page45).
☑ The check and replacement of the varistors is
completed.
There is no conducting connection. The respective varistor is defective and must be
replaced.
Varistor failure is generally due to influences which
affect all varistors similarly (temperature, age, induced
overvoltage). SMA Solar Technology AG
recommends that you replace both varistors.
The varistors are specially manufactured for use in the
inverter and are not commercially available. You must
order replacement varistors directly from
SMASolarTechnology AG
(seesection13”Contact” (page70)).
• For the replacement of the varistors, proceed to
step 3.
NOTICE!
Overvoltage due to faulty varistors. Destruction of the inverter by overvoltage.
• Procure replacement varistors as soon as possible and replace the defective ones
immediately.
• For systems with a high risk of overvoltage, do not operate inverters using faulty
varistors or no varistors at all.
Result Action