SMA SUNNY BOY - Manual (Page 41)

SMA Solar Technology AG Measurement Channels and Messages
User Manual SB_SMC-BEN092840 41
VpvMax
Vpv-Max Overvoltage at DC input.
Corrective measures
• Please contact your installer who will immediately disconnect the
PV generator from the inverter! Otherwise, the inverter may be
damaged.
• Have your installer check the plant configuration and the DC
voltage before reconnecting the inverter to the DC voltage.
Uzkposneg<10 Disturbance in the intermediate circuit.
Corrective measures
• Please contact your installer or the SMA Solar Technology
Serviceline if this problem recurs.
UZWK-Max The internal hardware monitor has detected an overvoltage condition in
the intermediate circuit of the inverter.
Corrective measures
• Please contact your installer or the SMA Solar Technology
Serviceline if this problem recurs.
Watchdog
Watchdog-Srr Internal program run fault.
Corrective measures
• Please contact your installer or the SMA Solar Technology
Serviceline if this problem recurs.
Zac-Bfr
Zac-Srr The grid impedance is no longer within the permissible range ("Bfr" or
"Srr" is an internal message that has no meaning for the user). For safety
reasons, the inverter disconnects itself from the grid. The impedance is
calculated from the grid impedance and the impedance of the grid
connection cable (AC cable) of the inverter.
Corrective measures
• Please contact your installer to check the grid impedance and the
grid connection at the inverter. Use a cable with sufficiently large
cross-section (= low impedance), as recommended in the
installation guide. It may also be possible to rectify this fault by
tightening the screws of the AC terminals.
• If this fault recurs, please contact the SMA Solar Technology
Serviceline.
Message Description and corrective measure