SMA SB 4200TL Multi-String - Manual (Page 45)

SMA Technologie AG Technical Documentation
Operating Instructions SB4200-12:FE4804 Page 45
6.4.2 Status Messages
The Sunny Boy 4200TL Multi-String generates a number of status messages accor-
ding to the mode it currently operates in. The status messages that you see can differ
depending on the type of communication you are currently using (Sunny Display,
Sunny Data, Sunny Boy Control, Sunny Data Control).
Upv-Soll DC-A/
Vconst-SetpointA PV setpoint voltage (String A)
Upv-Soll DC-B/
Vconst-SetpointB PV setpoint voltage (String B)
Zac Grid impedance
PPV DC-A Present power from String A
PPV DC-B Present power from String B
Message Description
MPP The Sunny Boy 4200TL Multi-String is operating in MPP mode.
The input voltage setpoint is constantly adjusted in order to ob-
tain the maximum energy from the different strings. This is the
default operating mode in normal operation with normal irra-
diation.
U-Konst Constant voltage operation. (The input voltage from the PV
modules is fixed to a defined setpoint. The Sunny Boy 4200TL
Multi-String 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 mo-
dules is fixed to a defined setpoint. The Sunny Boy 4200TL
Multi-String is not operating in MPP mode.) This mode can be
defined as operating mode in special applications.
Derating PV generator power is higher than the amount the Sunny Boy
4200TL Multi-String can process.
Derating Idc /
derat. Idc The Sunny Boy 4200TL Multi-String is reducing the output po-
wer due to overcurrent on the DC side. This is not a critical sta-
tus, but you should keep in mind that your plant is loosing
energy in this mode. Have your installer check the configura-
tion of your plant if this occurs regularly.
Derating WR (T°)
Derating DC (T°) The Sunny Boy 4200TL Multi-String is reducing the output po-
wer 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 suf-
ficient clearance can solve this problem.
Channel Description