I have un Heidenhain TNC 426 (280462 03) and have 2 alarm righ now, Alarm 4 and Alarm 5, in machine manual say I must restart de machine, but dont work, then I disconnect the motor of Z axis, and some times with this, the alarms take off, but in some weeks back again, and dont know what is the problem

I hope my english be clear with my problem

Thanks
Alejandro