89
Malfunction Description Remedies
401:SD Card The solar inverter cannot find
an SD card.
➡ Restart the solar inverter.
If the error still occurs, please
contact the technical hotline.
The phone number is provided
on the back of the manual.
402:SD Card The SD card is write-protected ➡ Restart the solar inverter.
If the error still occurs, please
contact the technical hotline.
The phone number is provided
on the back of the manual.
403:CAN User Communication error with CAN
user.
➡ Check whether an error
has occurred in the CAN
secondary unit. Restart se-
condary unit and main unit
if necessary.
89
Malfunction Description Remedies
404:CAN Bus CAN bus not in operation. No communication is possible
via the CAN bus.
➡ Check the bus lines and
the terminating resistors.
➡ Check whether the maxi-
mum permissible line
lengths have been complied
with.
➡ Check whether the bus lines
have been routed parallel to
power cables. Separate bus
lines and power cable from
each other spatially if neces
-
sary.
405:CAN User CAN user does not respond. ➡ Check whether an error
has occurred in the CAN
secondary unit. Restart
secondary unit if necessary.
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