I have one Okuma LB15 year 1998 with OSP 5000 L-G.
When i was using the machine and did the first cut it went to deep in the material so the machine stopped imidiatly the spindle stopped and the machine came up with the alarm: Alarm 110-A spindle unit 1

I restarted the machine after the crash and when i started the machine again the Alarm: 110-A spindle unit 1 appeared. I then get an alarm on the digital AC unit (printed circuitboard) AL-12 alarm.
as soon as i start the machine evrything works exept when im trying to start the spindle then thoose alarm appears.
No fuses has blown evrything is good, The main spindle servo engine has no errors.

AL-12 alarm on the printed circuitboard meaning is current DC-link is to much.
I have checked DC power volt check on PCB check terminals. Where it should be 24V i get 26.4V.
That is the only error i find. What does it mean? what is the problem?


Printed circuit board: A20B-101-0120 edition number: 16ER 927R
Reference of drive: A06B-6055-H208
Reference of rom: 9603