SMA SB 4200TL Multi-String - Manual (Page 15)

SMA Technologie AG Device Description
Operating Instructions SB4200-12:FE4804 Page 15
3.2.2 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 blin-
king four times in short in-
tervals. The code is sent
three times. If the failure
persists the code is repea-
ted.
3.2.3 Uncritical Failure States
All other signaling codes show uncritical operating states. These normally do not
mean any high danger of people or device, but their cause must be found and remo-
ved immediately in order to avoid yield losses.
Despite all the necessary precaution it is possible that there are additional faults
which can not be signaled (e. g. failure of the status display). 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 3.2.4 "Description of Ope-
rating States" (page 16). For example if the green LED is on in the middle of the night,
this means as much a failure as if no LED is on in full sunlight.
You can diagnose the states in much more detail with one of the communication in-
terfaces described in chapter 5 "Plant Monitoring" (page 33).
Immediately disconnect the PV generator from the inverter!
The Sunny Boy can otherwise be severly damaged.
5 s 3 s 1 s 1 s 1 s 1 s
LED on LED off
Yellow LED is blinking 4
times in short intervals.
The signal is repeated 3 times and
then starts from the beginning.