SMA SB 4200TL Multi-String - Manual (Page 19)

SMA Technologie AG Device Description
Operating Instructions SB4200-12:FE4804 Page 19
Varistor Defective
At least one of the four thermally mo-
nitored varistors on the DC input side
has developed high resistance and is
therefore defective.
Permanent Device Disable
This signal appears if there is a failure
of the grid monitoring / the indepen-
dent disconnection device (MSD).
During the internal test, the inverter
has detected a malfunction of the
MSD and has stopped feeding to the
grid.
Normally this is a failure which can-
not be removed on site. Please con-
tact the manufacturer (see chapter 8
"Contact" (page 61)) to discuss
further proceedings.
DC Input Defective
The red LED blinks once per second,
the green and yellow LED are not
relevant for this blinking code. At
least one of the two DC inputs is de-
fective.
Normally this is a failure which can-
not be removed on site. Please con-
tact the manufacturer (see chapter 8
"Contact" (page 61)) to discuss
further proceedings.
Please contact a qualified electrician who will remove the fai-
lure following the instructions in the „Installation Guide“.
Green LED is
permanently on
Red LED is
permanently on
Yellow LED is
permanently on
1 s
Red LED blinks
once per second