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SMA Solar Technology AG 10 Troubleshooting
Installation Manual SB13_21TL-IA-en-65 51
Vac-Bfr
Vac-Srr
The mains voltage is no longer within the permissible range. The inverter has
disconnected from the electricity grid for safety reasons. This may have the
following causes:
The miniature circuit-breaker is switched off.
AC cable is interrupted
AC cable is highly resistive.
Corrective measures:
Ensure that the AC cable is connected correctly (see Section6.3.2
"Connecting the Inverter to the Electricity Grid", page27).
Ensure that the mains voltage is within the permissible range.
Ask the network operator for permission to change the parameters
Vac-Min / Voltage monitoring upper minimum threshold and
Vac-Max / Voltage monitoring lower maximum threshold.
If the AC cable is connected correctly, the mains voltage is within the
permissible range and this message is still displayed, contact the
SMA Service Line.
VpvMax Overvoltage at the DC input. The inverter may be destroyed.
Corrective measures:
1. Disconnect the miniature circuit-breaker.
2. If there is an external DC switch-disconnector, turn it off.
3. If an ESS is in use, disconnect it.
4. Release and disconnect all DC connectors using a screwdriver
(blade width 3.5 mm).
Insert a screwdriver into one of the side slots.
–Pull the DC connectors out.
5. Check whether the DC voltage is below the maximum input voltage of
the inverter. If the DC voltage is below the maximum input voltage of
the inverter, reconnect the DC connectors to the inverter.
If the DC voltage is above the maximum input voltage of the inverter,
check the PV plant design or contact the installer of the PV array.
6. If this message recurs frequently, disconnect the inverter from voltage
sources (see Section 8) and contact the SMA Service Line.
Vinternal The internal hardware monitor has detected an overvoltage condition in the
intermediate circuit of the inverter.
Corrective measures:
If this message is displayed frequently, contact the SMA Service Line.
Message Description and Corrective Measures
51


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