Hello, i have a okuma LR15 machine with a VAC1 spindle drive and a one speed motor and gear box. The problem that i have is once the spindle runs and i either stop the spindle or slow down the speed, it gives an alarm. If I look on tha back for the LEDs, the two red LEDs are blinking and either LED9 or LED10 is lit. LED9 is for regen error and LED10 is for OVER voltage. Can someone please help me!

Thanks