Please perform the following for Rotor Recognition.
Go to Service Mode 8.
( To enter the Service Mode - hold up and down keys while turning on Main Supply switch)
Scroll to SE 8 using the up/down arrow keys.
Open the lid at this point so you can access rotor .
Press Start
"rotate" is displayed
Open the lid and rotate the rotor by hand .
For Rotor A-4- 62 rotor relation should be between 220-240 and the rotor number is 4 .
For Rotor A-4-44 rotor relation should be between 375-395 and the rotor number is 8.
This test will confirm that your electronic recognition and sensor work.