Installation Manual SMC9-11TLRP-IA-en-51 71
SMA Solar Technology AG 10 Troubleshooting
Depending on the design of the ESS, you can recognise wear either on the metal mounting tabs or on
the plastic of the ESS.
2. Check the metal mounting tabs or plastic inside the ESS.
The ESS is worn if the metal mounting tabs have brown discolouration or are burnt out or the
plastic is damaged. That prevents the ESS disconnecting the PV array reliably. Order a new ESS
and replace the damaged ESS (see section 13 "Accessories", page 91).
10.6 Checking the ESS for Wear
1. Remove the ESS.
The metal mounting tabs and plastic must not be
discoloured or damaged.
3.
Risk of fire due to tightening the screw within the ESS
A perfect contact between the ESS and the inverter is only guaranteed if the ESS plug remains
flexible.
• Do not tighten the screw in the plug of the ESS.
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