SMA SUNNY CENTRAL 900CP XT - Maintenance Work in Disconnected State; Performing the Visual Inspection; Analyzing the Temperature Indicators

6 Maintenance
SMA Solar Technology AG
Maintenance Manual 51SCCPXT-E7-WA-en-37
5. Disconnect the supply voltage (see Section4.2.4, page27).
6. Measure the time until the communication unit switches off.
☑ The communication unit switches off after 15 seconds at the earliest.
✖ The communication unit switches off earlier?
• Contact SMA Solar Technology AG.
6.4.2 Maintenance Work in Disconnected State
6.4.2.1 Performing the Visual Inspection
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. Check the inverter for visual defects such as discoloration, dirt, damage and scratches on the enclosure.
If visual defects are present, repair these immediately.
2. Ensure that there are no objects on or around the inverter that are flammable or that could otherwise endanger
operational safety.
6.4.2.2 Analyzing the Temperature Indicators
Depending on the type of inverter bridge, the inverter cabinet contains 8 or 17 temperature indicators which monitor
the temperature of the inverter bridges.
Figure 15: Position of the temperature indicators (example: inverter bridges with connection terminals at the upper end)
Position of the indicators Type of inverter bridges Number of indicators
1 to 17 with connection terminals at the upper
end
17
10 to 17 without connection terminals at the up-
per end
8