SMA SB 3300-11 Installation - Manual (Page 51)

SMA Solar Technology AG Troubleshooting
Installation Manual SB33-38-11-IA-en-62 51
9.2 Error Messages
When an error occurs, the inverter generates a message which depends on the operating mode and
the type of the fault detected.
Message Description and corrective measure
!PV-Overvoltage!
!DISCONNECT DC! Overvoltage at DC input.
Overvoltage can destroy the inverter.
Corrective measures
Disconnect the inverter from the power distribution grid immediately.
1. Disconnect the miniature circuit-breaker.
2. If installed, disconnect the external DC switch-disconnector.
3. If an Electronic Solar Switch is installed, remove it.
4. Remove all DC connectors.
5. Check the DC voltage:
– If the DC voltage is above the maximum input voltage, check the
plant design or contact the PV array installer.
– If the DC voltage is below the maximum input voltage,
reconnect the inverter to the PV array as described in section
5.4 "Setting the Display Language" (page 29).
If the message occurs again, disconnect the inverter again and contact
the SMA Service Line (see section 13 "Contact" (page 72)).
ACVtgRPro The 10-minute average line voltage is no longer within the permissible
range. This can be caused by the following:
• The line voltage at the terminal is too high.
• The grid impedance at the terminal is too high.
The inverter disconnects to assure compliance with the power quality of
the power distribution grid.
Corrective measures
Check the line voltage at the terminal of the inverter:
• If, due to the local grid conditions, the line voltage is 253 V or
more, ask the grid operator whether the voltage at the feed-in point
can be adjusted, or whether they would agree to an alteration of
the limiting value of parameter "ACVtgRPro" for power quality
monitoring.
• If the line voltage is continuously within the tolerance range and this
error message is still displayed, contact the SMA Service Line.
Bfr-Srr Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.