SMA SC 500U Installation - Manual (Page 60)

SMA Solar Technology AG
60 SC500U-IUS093411 Installation Guide
10 Opening the Sunny Central
10.1 Opening the Control Cabinet
DANGER
Electric shock due to improper opening of the Sunny Central!
Death resulting from burning and electric shock.
• All procedures described in this Section shall only be conducted by qualified
personnel.
• Observe the sequence described here when opening the Sunny Central.
• If problems occur when performing the work described here, contact SMA America.
1. Turn the stop/start switch on the Control Cabinet's
door to the left until it reaches the stop position.
2. The AC and DC switches in the Sunny Central switch off audibly.
3. Switch off the AC disconnect in the array and secure it against accidental switching on.
☑ When the Sunny Central is disconnected, the display turns off.
4. Cover the PV modules.
5. Switch off the fuses in the DC distribution boxes (e.g. Sunny Central String-Monitor) and secure
them against reconnection.
6. Wait 8 minutes
When the Sunny Central is switched off, voltage will remain in the internal capacitors for
another 8 minutes.
☑ The Sunny Central is deactivated and can be opened.
7. Put the key into the Control Cabinet's lock and open
it.
☑ The handle flips up.
Stop Start
Stop S tart