SMA SMC 7000HV Installation - Manual (Page 77)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC70HV11-IA-IEN112970 77
3. Insert an insertion tool into the openings of the
terminal contacts (1).
☑ This releases the terminals.
If you do not receive an insertion tool for operating
the terminals 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 varistor (2).
5. Insert new varistor (3).
The pole with the small loop (crimp) must be fitted
to terminal 1 when replacing the varistor.
6. Close the inverter as described in section
7.3 "Closing the Inverter" (page 59).
☑ 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 that 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 12 "Accessories"
(page 84)).
• 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.
• Do not operate the inverter without varistors in PV plants with a high risk of
overvoltages.
• Replacement varistors should be obtained as soon as possible.
Result Measure