TFD334 SValarm CCS A2 not open

Good Morning Gents... i have a machine that continues to throw this alarm, TFD 334 SV alarm CCS A2 not open to air as soon as i start Citric Heat. The machine will only complete the process under TK red alarm reset. Machine was just PMd and still having the alarm before and after PM. Thanks

Got this going out to Nikkiso Tech support Stand by