SMA SB 1200 Installation - Manual (Page 60)

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60 SB12-17-IA-en-52 Installation Guide
3. Insert an insertion tool into the openings of the
terminal contacts (1).
☑ The terminal clamps loosen.
If you do not receive an insertion tool for operating
the terminal clamps with your replacement
varistors, 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.
6. Close the inverter as described in section
7.3 ”Closing the Inverter” (page 48).
☑ The check and replacement of the varistors is
completed.
☑ There is no conducting
connection.
The respective varistor is not working 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. They must be
ordered directly from SMA Solar Technology AG (see
section 12 ”Accessories” (page 69)).
• To replace the varistors, proceed to step 3.
NOTICE!
Destruction of the inverter due to overvoltage.
If varistors are missing, the inverter is no longer protected against overvoltages.
• Replacement varistors should be obtained as soon as possible.
• Do not operate the inverter without varistors in plants with a high risk of overvoltages.
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