PLC6 drop out in weekend caused the ITH MP1 and MP1s stopped. ITE turbo pumps were running still after that. Without back up pump, TPs started to trip off  later .  I found TP1,TP3, and TP4 were  tripped off this morning. And , The rest pumps ran with high current draw.  Jon Aoki restarted back up pumps and ITE turbo pumps. The ITE vacuum system works fine now.