SMA SC 500HE-20 Maintenance Manua - Manual (Page 24)

6 Maintenance Under Voltage-Free Conditions SMA Solar Technology AG
24 SC500-800HE20-WH-en-10 Maintenance Manual
2. If the GFDI or the soft grounding relay have been tripped 100 times due to short-circuit, replace
the components.
– Remove the cables. Mark the cables in the process. They must be connected to the same
terminals again later.
– Release the components and remove from the top-hat rail in an upwards direction.
– Insert the new components into the top-hat rail from above and press against the top-hat rail.
– Connect the cables to the terminals from which you removed them before.
3. If the GFDI has been replaced, set the current value to 5 A.
4. If the soft grounding relay has been replaced, make the following settings:
6.4.6 Checking the Screw Connections of the Power Cabling
1. %"/(&3
Danger to life from electric shock or electric arc when touching live components.
• Disconnect the inverter (see Section 6.1).
Item Configuration value
Upper potentiometer 0.8
Middle potentiometer 0 s
Lower potentiometer 0.9
/05*$&
Damage to screw connections from over-tightening
• Only apply the prescribed torque to tighten loose screw connections. Torque specifications
are shown in the circuit diagram of the inverter. Contact the SMA Service Line if specifications
are missing.