SMA SB 3300TL - Manual (Page 44)

Technical Documentation SMA Technologie AG
Page 40 SB3300TL-11:FE1905 Operating Instructions
7.4.2 Status Messages
The Sunny Boy 3300TL generates a number of status messages according to the
mode it currently operates in. The status messages displayed can differ depending on
the type of communication you are currently using (Sunny Display, Sunny Data, Sun-
ny Boy Control, Sunny Data Control).
Message Description
MPP The Sunny Boy 3300TL is operating in MPP mode. The input
voltage setpoint is permanently adjusted in order to obtain the
maximum energy from the different strings. This is the default
operating mode in normal operation with normal irradiation.
U-Konst Constant voltage operation. (The input voltage from the PV-
modules is fixed to a defined setpoint. The Sunny Boy 3300TL
is not operating in MPP mode.) This mode can be defined as
operating mode in special applications.
I-Konst Constant current operation. (The input current from the PV-
modules is specified to a defined setpoint. The Sunny Boy
3300TL is not operating in MPP mode.) This mode can be de-
fined as operating mode in special applications.
Derating PV-generator power is higher than the amount the Sunny Boy
3300TL can process.
Derating Idc /
derat. Idc The Sunny Boy 3300TL is reducing the output power due to
overcurrent on the DC side. This is not a critical status, but your
plant is loosing energy in this mode. Have your installer check
the configuration of your plant if this occurs regularly.
Derating WR (T°)
Derating DC (T°) The Sunny Boy 3300TL is reducing the output power due to
overtemperature of the DC converters („DC“) or the inverter
bridge („WR“). Have your configuration and your string size
checked if this occurs regularly. Ventilation and sufficient
clearance can solve this problem.
Fehler/
Error A failure has been detected and a failure message has been
generated (see following table „Failure messages“).
Netzueb. /
grid. mon. Test of grid status for subsequent connection (grid imped-
ance), relay test etc. This mode only occurs during startup, be-
fore the Sunny Boy connects to the grid. This status can often
occur during the morning and evening with varying irradia-
tion.
Offset Offset adjustment of measurement electronics
Riso Measurement of irradiation resistance of PV-plant
Stoer./disturb. Failure (see following table „Failure messages“)