R E X R D C 77570 W 91609608403 74132599 ошибка E 50

Hello
I have a D R Y E R R E X MODEL . R D C 77570 W
916 096 084 03
741 325 99
Does n o t turn t h e motor .
Error E 50
T h e engine i s ok ,
changed capacitors .
The problem is the electronic board .
I checked relays and are good .
good diode . Transistor good . U A L N 2003 good.
If I send signal +5 volts at INPUT L U N 2300 A motor starts .
But in the program does not start .
I have programmed micro controller M C 9 S 0 8 A 48 W ?
Can you give me some help?
With the help of the micro controller programming ?