SMA SB 2500 Installation - Manual (Page 54)

Troubleshooting SMA Solar Technology AG
54 SB25-30-IA-en-51 Installation Manual
Earthfault The electrical insulation between the PV plant and earth is defective.
The resistance between the DC plus and/or DC minus connection and
earth is outside the defined limit range.
Corrective measures
• Check the insulation of the PV plant.
• Check the installation for earth faults as described in Section 9.3.1
"Checking the PV Array for Earth Faults" (page 56).
ROM The inverter's firmware is faulty.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Shutdown Temporary inverter fault.
Corrective measures
• Contact the SMA Service Line.
Vac-Bfr
Vac-Srr The line voltage is no longer within the permissible range
("Bfr" or "Srr" is an internal message of no relevance for the user).
This fault can be caused by any of the following conditions:
• Mains disconnected (miniature circuit-breaker, fuse)
• AC cable is interrupted
• AC cable is highly resistive
The inverter disconnects itself from the power distribution mains for safety
reasons.
Corrective measures
• Check the line voltage and mains connection on the inverter.
• If the line voltage lies outside the acceptable range because of
local mains conditions, ask the network operator if the voltages can
be adjusted at the feed-in point or if they agree to changes in the
values of the monitored operating limits
(operating parameters: Vac-Min and Vac-Max).
• If the line voltage lies within the tolerance range, yet "Vac-Bfr" or
"Vac-Srr" faults are still displayed, contact the SMA Service Line.
Message Description and corrective measure