SMA SMC 7000HV Installation - Manual (Page 72)

Troubleshooting SMA Solar Technology AG
72 SMC70HV11-IA-IEN112970 Installation Manual
Zac-Bfr
Zac-Srr The grid impedance has left the permissible range. The suffixes "Bfr" und
"Srr" are not relevant.
The inverter disconnects itself from the public grid for safety reasons. The
impedance is calculated from both the grid impedance and the
impedance of the AC cable of the inverter.
Corrective measures
• Check the grid impedance and grid connection on the inverter.
• Use an AC cable with an adequate cross-sectional area
(= low impedance) as described in section 5.2 "Connection to the
Power Distribution Grid (AC)" (page 24). If required, re-tighten the
screws on the AC terminals.
• If this fault recurs, contact the SMA Serviceline.
Message Description and corrective measure