Hello all,
I have a Okuma MA-400HA with a P200M control. Im not too familiar with okuma as this is our only one and it rarely goes down.

We keep getting a "1151-02 MCS... Y-Axis 400 #13" alarm that will not reset unless we cycle the power. We took a look at the drive unit, when this alarm occurs the drive display flashes back and forth from "13" to "E.L". Alarm usually occurs when the spindle is at tool change position (not during tool change but a few minutes after) while sitting idle. I'm told there can be a problem with the inverter drive or motor but would like to narrow it down. Has anyone else had this issue?