Bosch BPT-S 3 Manuel De Service page 221

English Help in the event of faults | 103
All four LEDs are permanently red: Fault in the
string inverter
The string inverter has an internal fault that cannot be
remedied on site: Contact Bosch Power Tec Service
(see contact details on the back of the manual).
8.1.2 Faults that can be remedied
Just one LED permanently red: Fault in the string
inverter that can be remedied
The string inverter is indicating a fault in the LED area
(Ready, Generator, Grid or Communication), which
can possibly be remedied: See table Messages on the
display screen and LED status indicator, p. 105.
Bosch Power Tec GmbH Bosch BPT-S 3 / 3.68 / 4 / 4.6 | Operating manual