SMA WB 5000A-11 Installation - Manual (Page 66)

Troubleshooting SMA Solar Technology AG
66 WB5A_6A-IA-IEN114540 Installation Manual
9.2 Error Messages
When a disturbance occurs, the inverter generates a display message depending on the operating
mode and the detected disturbance.
Message Description and Corrective Measures
!PV-Overvoltage!
!DISCONNECT DC! Overvoltage at DC input!
Overvoltage can destroy the inverter.
Corrective measures
Disconnect the inverter immediately.
1. Stop the small wind turbine system.
2. Disconnect the miniature circuit-breaker.
3. Remove all DC connectors.
4. Check the DC voltage:
– If the DC voltage is above the maximum input voltage,
check the plant design.
– If the DC voltage is under the maximum input voltage,
reconnect the small wind turbine system to the inverter as
described in Section 5.4.4 "Connecting the Small Wind Turbine
System (DC)" (page 34).
If the display message is repeated, disconnect the inverter again and
contact the SMA Service Line.
ACVtgRPro The 10-minute average line voltage is no longer within the permissible
range. This can be caused by either of the following:
• The line voltage at the connection point is too high.
• The grid impedance at the connection point is too high.
The inverter disconnects from the power distribution grid to assure
compliance with the power quality.
Corrective measures
Check the line voltage at the connection point of the inverter:
• If the line voltage is 253 V or higher as a result of local grid
conditions, contact the grid operator to request that the voltage be
adjusted at the feed-in point.
or
• Ask the grid operator to agree to an adjustment of the limit value
for the parameter "ACVtgRPro" for monitoring voltage quality.
• If the line voltage is permanently within the tolerance range and the
error message is still displayed, contact the SMA Service Line.