SMA WB 5000A-11 Installation - Manual (Page 69)

SMA Solar Technology AG Troubleshooting
Installation Manual WB5A_6A-IA-IEN114540 69
Trafo-Temp-W If the transformer temperature has risen above the acceptable level, the
inverter stops feeding the grid until the temperature has reverted to an
acceptable level and the plant can begin feeding the grid again. The
"Trafo-Temp-W" warning is displayed until the device is completely
disconnected.
Corrective measures
• Check the heat dissipation of the inverter.
Vac-Bfr
Vac-Srr The line voltage is no longer within the permissible range
("Bfr" or "Srr" is an internal display message which has no relevance for
the user). This disturbance can be caused by any of the following
conditions:
• Grid disconnected (miniature circuit-breaker, fuse)
• AC cable is interrupted or
• AC cable is of high-resistance type.
The inverter disconnects from the power distribution grid for safety
reasons.
Corrective measures
• Check the line voltage and power supply line on the inverter.
• If the line voltage is outside the acceptable range because of local
grid conditions, ask the grid operator if the voltages can be
adjusted at the feed-in point or if they will agree to changes in the
values of the monitored operating limits
(operating parameters: Vac-Min and Vac-Max).
• If the grid frequency is within the tolerance range and the
disturbances "Vac-Bfr", or "Vac-Srr" are still displayed, contact the
SMA Service Line.
Message Description and Corrective Measures