I have just purchased a hurco sm-1 cnc that had been in storage for years, and has 9000 hrs on the meter., I am using a Vfd to operate it since i do not have 3 phase. i have managed to get the axis to all function and the spindle to opererate, when i had the spindle motor running @ high speed and slowed it down rapidly there are three electrocube suppressors on the motor circuit breaker assembly that started cooking/melting and smoking. i can still operate the spindle but now the suppressors strt to get hot very quickly. Can they be removed without harm? what could have caused them to burn out, To rapid of slow down of the motor?, . please help, tia