SMA SMC 7000HV Installation - Manual (Page 67)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC70HV11-IA-IEN112970 67
9.2 Fault Messages
When a disturbance occurs, the inverter generates a message which depends on the operating mode
and the type of the detected disturbance.
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. Turn off the miniature circuit-breaker.
2. Remove the Electronic Solar Switch.
3. Remove all DC connectors.
4. Check 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 under the maximum input voltage, reconnect
the PV array to the inverter as described in section
5.4 "Connecting the PV Array (DC)" (page 30).
If the message occurs again, disconnect the inverter again and contact
the SMA Serviceline (see section 13 "Contact" (page 85)).
ACVtgRPro The 10-minute-average grid voltage is no longer within the permissible
range. This can be caused by either of the following:
• The grid voltage at the connection point is too high.
• The grid impedance at the connection point is too high.
The inverter disconnects to assure compliance with the voltage quality of
the public grid.
Corrective measures
Check the grid voltage at the connection point of the inverter:
• If, due to the local grid conditions, the grid voltage is 253 V or
more, ask the distribution grid operator whether the voltage at the
feed-in point can be adjusted, or whether they would agree to an
alteration of the limit value "ACVtgRPro" parameter for power
quality monitoring.
• If the grid voltage is continually within the tolerance range and this
fault message is still displayed, contact the SMA Serviceline.
Bfr-Srr Internal measurement comparison fault or hardware defect.
Corrective measures
• If this disturbance occurs frequently, contact the SMA Serviceline.