SMA SB 1200 Installation - Manual (Page 55)

SMA Solar Technology AG Failure Search
Installation Guide SB12-17-IA-en-52 55
Riso The electrical insulation between the PV plant and ground is faulty. The
resistance between the DC plus and/or DC minus connection and ground
is outside the defined limit range.
Corrective measures
• Check the plant insulation.
• Check the plant for ground faults as described in section
9.3.1 ”Checking the PV Generator for a Ground Fault” (page 57).
ROM The inverter's firmware is faulty.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline.
Shutdown Temporary inverter fault.
Corrective measures
• Contact the SMA Serviceline.
Vac-Bfr
Vac-Srr The grid voltage is no longer within the permissible range ("Bfr" or "Srr" is
an internal message of no relevance for the user). This code can be
caused by any of the following conditions:
• Grid disconnected (line circuit breaker, fuse),
• AC cable is broken or
• AC cable is highly resistive
For safety reasons, the inverter disconnects itself from the grid.
Corrective measures
• Check the grid current and grid connection on the inverter.
• If the grid voltage lies outside the acceptable range because of
local grid conditions, ask the utility provider if the voltage can be
adjusted at the feed-in point or if it would agree to changes in the
values of the monitored operational limits (operating parameters:
Uac-Min and Uac-Max).
• If the grid frequency is within the tolerable range, yet "Vac-Bfr," or
"Vac-Srr" faults are still being displayed, please contact the SMA
Serviceline.
Message Description and corrective measure