SMA 10000TL - Page 76

Troubleshooting SMA Solar Technology AG
76 SMC9-11TLRP-IEN100640 Installation Guide
2. With the aid of a multimeter, determine for both
varistors in the installed state whether a conductive
connection exists between connectors B and C.
Result Action
☑There is a conductive
connection:
There is probably a different fault in the inverter.
• Close the inverter as described in section 7.3”Closing
the Inverter” (page59).
• Contact the SMA Serviceline (see section 13”Contact”
(page90)).
☑There is no conductive
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. You must order
replacement varistors directly from SMA Solar Technology
AG (see section 12”Accessories” (page88)).
• 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 plants with a high risk of overvoltages.
• Replacement varistors should be obtained as soon as possible.