SM74 a warning symbol in starting up

Dear all, i hope you have a good day.
We have a machine SM74-5 year of construction 2000, at starting up after cutting the power off a symbol like a man appears at the screen. I don't understand what this symbol mean. After we start the machine the machine don't start automatically but after i check the error messages the machine can be start automatically. I went to check the INIT and DYN and the errors where as follows:
INIT t = 0 :
S-SAK FFEF
S-HAK 5 M1 FFF5
S-SSK 1 M9 FFFC
DYN t=0:
A-FEU 1 FFFE
The problem of M1 and M9 is not a affecting the process but the problem of SAK and FEU is not clear for me.
could you please help me in this issue.
Thanks in advance.

 

Hi sir:

Check THIS :

central measure of dampening solution does not send a response to CPTronic .

 

A-FEU is due to the encoder of the main motor of the machine. S-SAK checks the battery of the card.

 

Symbol which you shown that lengthbof carbon brush is shorten due to which one switch which monitor the length bof carbon is now change the state

Pls check carbon as well as switch and realted wiring