dginbuffalo
Member
Hello- i have 200Hp compressor that is operated with a FW Murphy controller. As the unit ramps to speed, the input lights start to flicker and the whole unit goes down annd into alarm. The inputs are tied to ground to complete their circuit. This machine ran for years with no problems. We also burned out 2 controllers in the last 8 months and now can't get the machine to ramp to speed without tripping. the 24V supply has been changed and no fix. Also put a Fluke 87 on Min hold and it seems stable through this occurence. Seems like a ground problem-any ideas??