Bosch BPT-S 3 Manuel De Service page 225

English
Fault message
ENGLISH
AC VOLTAGE
FIRMWARE
INT ELECTRONICS
COM FAULT
Bosch Power Tec GmbH
LED status indicator
Right LED red
Top LED red
All LEDs permanently
red
Bottom LED red
Help in the event of faults | 107
Possible cause
AC surge voltage
AC voltage is too low
Mains plug installed
incorrectly
Grid impedance is too
high
Incorrect firmware due
to wrong firmware
updates
Faulty electronics
Communication fault
Bosch BPT-S 3 / 3.68 / 4 / 4.6 | Operating manual
Possible fault
rectification
Check voltage, if
necessary contact the
grid operator
Check voltage, if
necessary contact the
grid operator
Check installation and
connector pin
assignment
(Connecting the
network cable (AC
cable), p. 65)
Reduce the length of
the AC cable or
increase the AC cable
cross-section
Perform firmware
update again. During
the firmware update,
do not disconnect the
string inverter from the
grid or the Internet/
computer.
Contact Bosch Power
Tec Service (see
contact details on the
back of the manual)
Check connected
accessories and
internet connection