SMA America, LLC
Troubleshooting
Installation Guide
SB50US-80US-eng-IUS112633
77
8.4.5 Fixed Operating Parameters of the Sunny Boy
9 Troubleshooting
9.1 General
Every inverter is checked prior to leaving the plant. If there are faults in the operation of the inverter,
perform the following steps to rectify the faults.
• Pay attention to Sunny Boy flashing codes. Look up the meaning of the flashing code being
displayed in section 7 ”Commissioning” (page 61).
• Monitor operating modes and error messages on the LCD of the Sunny Boy or via connected
PV plant monitoring. Look up the meaning of messages being displayed in section 8 ”Displays
and Messages” (page 62).
• Monitor the DC and AC voltage at the terminals in the inverter. Please observe all safety
precautions listed in the course of this manual.
• If the fault cannot be rectified, contact SMA Serviceline. For contact data, see section
If it is necessary to return the Sunny Boy for maintenance, use the original box in order to prevent
shipping damage.
9.2 Error Messages
Name
Unit
Range
Standard
Description
Plimit
W
fixed
SB 5000-US:
5100
SB 6000-US:
6100
SB 7000-US:
7100
SB 8000-US:
8100
Upper limit of AC output power
SMA-SN
Serial number of the Sunny Boy
Software-BFR
Firmware version of the sequential
control system (BFR)
Software-SRR
Firmware version of the current
control system (SRR)
Fault Type
Fault Code
Description
Disturbance
Bfr-Srr
Communication between micro-controllers is
interrupted.
Warning
Derating
The inverter reduces the output power due to high
internal temperatures.
Fault
EarthCurMax-B
The ground current of the BFR between PV+ and
GND is outside of the tolerable range.
Fault
EarthCurMax-S
The ground current of the SRR between PV+ and
GND is outside of the tolerable range.