SMA SB 3300TL - Manual (Page 15)

SMA Technologie AG Device Description
Operating Instructions SB3300TL-11:FE1905 Page 11
3.3.2 Critical Failure States
Due to a comprehensive safety concept, the number of critical operating states can
be reduced to one:
Input voltage exceeding specification
This is shown with the following blinking code of the yellow LED:
When the failure occurs,
the yellow failure LED is on
for five seconds and then
starts to send the blinking
code by remaining off for
three senconds and blink-
ing four times in short inter-
vals. The code is sent three
times. If the failure persists
the code is repeated.
3.3.3 Uncritical Failure States
All other signaling codes show uncritical operating states that normally do not pose
imminent danger of people or devices. However, their cause must be immediately
found and removed in order to avoid yield losses.
Despite all necessary precautions additional failures which can not be signaled (e. g.
failure of the status display) can occur. In order to be able to detect such failures as
well, the operator should check the display of normal operating states for plausibility
based on the explanations given in chapter 3.3.4 "Description of Operating States"
(page 12). For example if the green LED is on at night, it indicates a failure in the
same way as if no LED is on in full sunlight.
More detailed diagnoses are possible by one of the communication interfaces de-
scribed in chapter 6 "Plant Monitoring" (page 29).
Immediately disconnect the PV-generator fro
The Sunny Boy can otherwise be severly dama
5 s 3 s 1 s 1 s 1 s 1 s
LED an LED aus
The yellow LED is blinking
4 times in short intervals
The signal is repeated 3 times and
then starts from the beginning