SMA SMC 4600A Installation - Manual (Page 67)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC46-60A11-IA-en-81 67
3. Insert the insertion tool into the openings of the
terminal contacts (1).
☑ This releases the terminals.
If you have not received an insertion tool for
operating the terminals with the replacement
varistors, contact SMA Solar Technology AG.
As an alternative, the individual terminal contacts
can be operated using a screwdriver
(blade width 3.5 mm).
4. Remove the varistor (2).
5. Insert the new varistor (3).
The pole with the small loop (crimp) must be fitted
to terminal A when replacing the varistor.
6. Close the inverter as described in Section 7.3
"Closing the Inverter" (page 51).
☑ The testing and replacement of the varistors is completed.
☑ There is no conductive
connection:
The respective varistor is defective and must be replaced.
Varistor failure is generally due to influences that affect
all varistors in a similar manner (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 79)).
• 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 PV plants with a high risk of
overvoltages.
Result Measure