SMA SUNNY CENTRAL 900CP XT - Disconnecting and Reconnecting; Safety When Disconnecting and Reconnecting Voltage Sources; Disconnecting the Inverter

6 Maintenance
SMA Solar Technology AG
Maintenance ManualSCCPXT-E7-WA-en-3750
6.4.1.5 Checking the Function of the UPS
Figure 14: Positon of the UPS
Position Designation
A Uninterruptible power supply (UPS)
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section4, page26).
Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section4.3.1, page28).
3. Measure the voltage at the supply voltage output between L1 and N.
☑ The voltage is approximately 230V.
✖ Voltage deviates significantly?
• Contact Service.
4. Measure the voltage at the supply voltage output of the UPS at -X400 terminal5 and -X402 terminal5.
☑ The voltage is approximately 24V.
✖ Voltage deviates significantly?
• Contact Service.