SMA SMC 4600A Installation - Manual (Page 59)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC46-60A11-IA-en-81 59
9.2 Error Messages
If a disturbance occurs, the inverter generates a message which depends on the operating mode and
the type of the disturbance detected.
Message Description and corrective measure
!PV-Overvoltage!
!DISCONNECT DC! Overvoltage at the DC input.
Overvoltage can destroy the inverter.
Corrective measures
Immediately disconnect the inverter from the electricity grid.
1. Disconnect the miniature circuit-breaker.
2. Remove the Electronic Solar Switch.
3. Remove all DC connectors.
4. Check the DC voltage:
– If the DC voltage is above the maximum input voltage, check the
PV 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 5.4.4 "Connecting the PV Array (DC)" (page 31).
If the message occurs again, disconnect the inverter again and contact
the SMA Service Line (see Section 13 "Contact" (page 80)).
ACVtgRPro The 10-minute average mains voltage is no longer within the permissible
range. This can be caused by one of the following:
• The mains voltage at the termination point is too high.
• The grid impedance at the termination point is too high.
The inverter disconnects from the grid to maintain power quality.
Corrective measures
Check the mains voltage at the termination point of the inverter:
• If, due to the local grid conditions, the mains voltage is 253 V or
more, ask the network 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 mains voltage is continually 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
• Contact the SMA Service Line if this disturbance occurs frequently.