LG FMU4480N6L Error 1 + 5

[robotronic]

Hi friend's,
I have a problem in a LG FMU4480N6L and the outside board, inside room machines blink a error led 1 Time, pause and 5 times. I think that is error 15.
Can anybody help-me about the cause off this problem or send-me the service manual or fault code ?
I have search this concret model but can't find error code.

Thanks.

[robotronic]

Hi again friend's, nobody can help-me ?
Thanks in advance.

Filipe Tomas