Troubleshooting SMA Solar Technology AG
76 SB20HF-30HF-IA-IEN120431 Installation Manual
5. Insert an insertion tool into the openings of the
terminal contacts (1).
☑ The terminals will loosen.
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.
6. Remove the varistor (2).
7. Insert the new varistor (1).
The pole with the small loop (crimp) must be fitted
to terminal 1 when replacing the varistor.
8. Bend new varistor upwards (2).
NOTICE!
Destruction of the inverter due to DC overvoltage.
If varistors are missing, the inverter is no longer protected against DC overvoltages.
• Do not operate the inverter without varistors in PV plants with a high risk of
DC overvoltages.
• Replacement varistors should be obtained as soon as possible.
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