SMA SUNNY CENTRAL 900CP XT - Demand-Based Annual Repairs; Repairs Every 10 Years; Repairs Every 12 Years; Maintenance Work

6 Maintenance
SMA Solar Technology AG
Maintenance Manual 45SCCPXT-E7-WA-en-37
6.3.2 Demand-Based Annual Repairs
Task Interval
Replace key switch In case of severe signs of wear
Replace surge arrester If tripped
Replace labels on the enclosure If illegible, defective or missing
Replace GFDI / ABB circuit breaker After 100 trippings due to short circuit
or
after number of switching cycles:7000
• Contact Service.
Replace Remote Switch Unit of the GFDI Number of switching cycles:7000
• Contact Service.
6.3.3 Repairs every 10 Years
Task Comment
Replace 24V power supply units • Contact the Service (see Section9, page68).
Replace 24 V buffer modules • Contact the Service (see Section9, page68).
Replace the fans of the AC disconnection unit • Contact the Service (see Section9, page68).
Replace exterior key switch, front element and label • Contact the Service (see Section9, page68).
6.3.4 Repairs every 12 Years
Replacement intervals for order option "QatNight"
The replacement intervals are halved for order option "QatNight".
Task Comment
Replace interior fan in the inverter cabinet • Contact Service.
Replace the inverter bridge fan • Contact Service.
6.4 Maintenance Work
6.4.1 Maintenance work with supply voltage present
6.4.1.1 Checking the Fans
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).