Checking The Integrated Dc Switch - SMA SUNNY CENTRAL 500CP-US/CA Maintenance Manual

9 Maintenance when Control Voltage is Present

9.2 Checking the Integrated DC Switch

Electric shock due to live voltage
High voltages are present in the inverter and its components. Touching live components results in death or serious injury.
Depending on the function, some maintenance work must be carried out with voltage present.
• Wear Hazard Risk Category 2 personal protective equipment.
• Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA),
NEC, and NFPA 70E.
• Do not touch any live components in the inverter or the medium-voltage grid.
• Follow the instructions precisely.
• Observe safety messages.
Indicators and switches on the DC Disconnect switchs
Figure 12:
Position Description
A Spring status indicator (not applicable for these motor driven switches)
B Position indicator
C ON button
D OFF button
Requirements before proceeding:
The inverter is operating without faults or errors.
1.
Danger to life due to electric shock or electric arc by touching live components
• Disconnect the inverter and wait 15 minutes until the capacitors have discharged completely (see Section 6).
2. Open the doors of the inverter cabinet.
3. Connect the control voltage (see Section 8 "Connecting the Control Voltage", page 44).
☑ The internal fan and the inverter bridge fan start up for a short time.
✖ The internal fan and inverter bridge fan do not start?
• Contact the SMA Service Line.
46 SCCP-US-WH-US_en-31
Proceedure:
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Maintenance Manual