SMA America, LLC
9 Maintenance when Control Voltage is Present
Maintenance Manual
SCCP-US-WH-US_en-31
47
Context:
The Integrated DC Switch option consists of a control actuator switch on the inverter door, red and green indictor lights
on the inverter door, and two motor driven DC load-break switches inside the inverter. This proceedure tests the correct
operation of each of these components.
Proceedure:
1. Verify that the Integrated DC Switch control actuator switch on the inverter door is in the
ON
position, and that the
green
CLOSED
indicator light is illuminated.
2. Switch the key switch of the inverter to
Stop
.
3. Check whether the red
OPEN
indicator light on the inverter door is illuminated, indicating that the DC load-break
switches are open.
4. Open the doors of the interface cabinet.
5. Check whether the DC load-break switches are both indicating the
Off
position. If either of the DC load-break
switches are not indicating the
Off
position, contact the SMA Service Line.
6. Close the doors of the interface cabinet.
7. Switch the key switch of the inverter to
Start
.
8. Check whether the green
CLOSED
indicator is illuminated, indicating that the DC load-break switches are closed.
9. Open the doors of the interface cabinet.
10. Check whether the DC load-break switches are indicating the
On
position. If the DC load-break switches are not
both indicating the
On
position, contact the SMA Service Line.
11. Switch the Integrated DC Switch control actuator switch on the inverter door to
OFF
.
12. Check whether the DC load-break switches are both indicating the
Off
position. If either of the DC load-break
switches are not indicating the
Off
position, contact the SMA Service Line.
13. Check whether the red
OPEN
indicator light on the inverter door is illuminated, indicating that the DC load-break
switches are open.
14. Test the switching process three times. Check each time whether the DC load-break switches have switched.
15. Close the doors of the interface cabinet.
Summary of Contents for SC 500CP-US-10
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