
Sunny Boy 700
Technical Description
SB700-11:EE
-
40
-
SMA Regelsysteme GmbH
A
The red LED is off. At least one of the thermally monitored varistors is de-
fective. Replace both varistors - they are only available from the manufac-
turer because they are designed especially for the Sunny Boy.
The thermally monitored varistors are not available on the market but are
especially designed for use in the Sunny Boy.
B
The red LED is still on. The following must be done:
•
Disconnect the inverter from the grid.
•
Disconnect all poles of the inverter from the PV-panels by pulling the Multi-
Contact plug connectors.
•
Wait 5 minutes until the internal voltage has discharged.
•
Remove the bridges from 2 to 3 in the two connector blocks. Mount a bridge
from connector 2 in one connector block to connector 2 in the other connector
block.
•
Re-connect the PV-panels and the grid to the Sunny Boy.
If the red LED is still on, the Sunny Boy is damaged and must be repaired by
the manufacturer.
If the red LED is off the isolation of the Sunny Boy or the connection cabling is defec-
tive.
•
Disconnect the Sunny Boy from the grid.
•
Disconnect the PV-panel from the inverter by MC plug connectors.
•
Now the isolation fault should be found and removed by taking appropriate
measurements.
•
Close the Sunny Boy as described in chapter 5.1.