SMA STP 15000TL Installation - Manual (Page 78)

Troubleshooting SMA Solar Technology AG
78 STP20TLHE-IA-IEN122222 Installation Manual
4. Remove all varistors.
If you have not received an insertion tool for
operating the terminals with your replacement
varistors, contact SMA Solar Technology AG.
5. Use a multimeter to check all the varistors to see if
there is a conductive connection between
connectors 2 and 3.
Result Measure
☑ There is a conductive
connection.
The varistor is functional. Presumably there is a different error in the
inverter.
• Proceed to step 8.
• Contact the SMA Service Line (see Section 15 "Contact"
(page 94)).
☑ There is no conductive
connection.
The respective varistor is defective and must be replaced.
Varistor failure is due to influences which affect all varistors
similarly (temperature, age, induced overvoltages).
SMA Solar Technology AG recommends replacing all 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 14
"Accessories" (page 93)). Only use original varistors that are sold
by SMA Solar Technology AG.
• To replace the varistors, proceed to step 6.
x x
x x x
x x x