SMA SC 500HE-20 Maintenance Manua - Manual (Page 15)

SMA Solar Technology AG 5 Maintenance when Voltage is Present
Maintenance Manual SC500-800HE20-WH-en-10 15
1. Move the key switch to "Stop".
2. Open the doors of the interface cabinet.
3. Check that the DC switch-disconnector is turned off and indicates the "Off" position.
If the DC switch-disconnector is not turned off and does not indicate the "Off" position, contact
the SMA Service Line.
4. Close the doors of the interface cabinet.
5. Switch the inverter to "Start".
6. Open the doors of the interface cabinet.
7. Check that the DC switch-disconnector is turned on and indicates the "On" position.
If the DC switch-disconnector is not turned on and does not indicate the "On" position, contact
the SMA Service Line.
8. Close the doors of the interface cabinet.
9. Move the key switch to "Stop".
10. Test the switching operation 3 times.