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[EnergyPlus_Support] Possible Reasons for CO2 Setpoint not being met?

My room setpoint is being relaxed during the peak consumption period of the day, to reduce peak consumption. I'm doing this via EMS.

The result is that the AHU reduces it's ventilation because it wants the air temperature to change to meet the setpoint, but the CO2 level rises out of control.

Report for offending zone sample below...any ideas? Timesteps (currently 6)?

Date/Time	Zone Air Carbon Dioxide Concentration  PIERW%W%E00:PIERW%W%E00 [ppm]
2004-07-15 00:00:00	719.496
2004-07-15 01:00:00	714.93
2004-07-15 02:00:00	711.703
2004-07-15 03:00:00	711.568
2004-07-15 04:00:00	735.407
2004-07-15 05:00:00	785.058
2004-07-15 06:00:00	810.171
2004-07-15 07:00:00	807.32
2004-07-15 08:00:00	788.608
2004-07-15 09:00:00	785.865
2004-07-15 10:00:00	849.571
2004-07-15 11:00:00	965.102
2004-07-15 12:00:00	1,094.36
2004-07-15 13:00:00	1,138.58
2004-07-15 14:00:00	1,107.65
2004-07-15 15:00:00	1,070.1
2004-07-15 16:00:00	1,023.42
2004-07-15 17:00:00	931.16
2004-07-15 18:00:00	844.659
2004-07-15 19:00:00	799.718
2004-07-15 20:00:00	771.543
2004-07-15 21:00:00	739.898
2004-07-15 22:00:00	716.119
2004-07-15 23:00:00	711.705

Date/Time	Zone/Sys CO2 Load Rate Predicted to Carbon Dioxide Setpoint  PIERW%W%E00:PIERW%W%E00 [kg/s]
2004-07-15 00:00:00	0
2004-07-15 01:00:00	0
2004-07-15 02:00:00	0
2004-07-15 03:00:00	0
2004-07-15 04:00:00	0
2004-07-15 05:00:00	17.1734
2004-07-15 06:00:00	51.9077
2004-07-15 07:00:00	54.178
2004-07-15 08:00:00	6.65255
2004-07-15 09:00:00	5.52412
2004-07-15 10:00:00	192.717
2004-07-15 11:00:00	437.402
2004-07-15 12:00:00	511.052
2004-07-15 13:00:00	459.472
2004-07-15 14:00:00	429.258
2004-07-15 15:00:00	390.575
2004-07-15 16:00:00	620.669
2004-07-15 17:00:00	492.805
2004-07-15 18:00:00	164.693
2004-07-15 19:00:00	32.4404
2004-07-15 20:00:00	0
2004-07-15 21:00:00	0
2004-07-15 22:00:00	0
2004-07-15 23:00:00	0

Date/Time	Zone/Sys Carbon Dioxide Setpoint  PIERW%W%E00:PIERW%W%E00 [ppm]
2004-07-15 00:00:00	800
2004-07-15 01:00:00	800
2004-07-15 02:00:00	800
2004-07-15 03:00:00	800
2004-07-15 04:00:00	800
2004-07-15 05:00:00	800
2004-07-15 06:00:00	800
2004-07-15 07:00:00	800
2004-07-15 08:00:00	800
2004-07-15 09:00:00	800
2004-07-15 10:00:00	800
2004-07-15 11:00:00	800
2004-07-15 12:00:00	800
2004-07-15 13:00:00	800
2004-07-15 14:00:00	800
2004-07-15 15:00:00	800
2004-07-15 16:00:00	800
2004-07-15 17:00:00	800
2004-07-15 18:00:00	800
2004-07-15 19:00:00	800
2004-07-15 20:00:00	800
2004-07-15 21:00:00	800
2004-07-15 22:00:00	800
2004-07-15 23:00:00	800

Date/Time	Zone Carbon Dioxide Internal Gain  PIERW%W%E00:PIERW%W%E00 [m3/s]
2004-07-15 00:00:00	0.000737164
2004-07-15 01:00:00	0.000368582
2004-07-15 02:00:00	0.000368582
2004-07-15 03:00:00	0.000368582
2004-07-15 04:00:00	0.00147433
2004-07-15 05:00:00	0.00331724
2004-07-15 06:00:00	0.00368582
2004-07-15 07:00:00	0.00331724
2004-07-15 08:00:00	0.00258007
2004-07-15 09:00:00	0.00258007
2004-07-15 10:00:00	0.00294866
2004-07-15 11:00:00	0.00184291
2004-07-15 12:00:00	0.00258007
2004-07-15 13:00:00	0.00184291
2004-07-15 14:00:00	0.00221149
2004-07-15 15:00:00	0.00331724
2004-07-15 16:00:00	0.00294866
2004-07-15 17:00:00	0.00258007
2004-07-15 18:00:00	0.00331724
2004-07-15 19:00:00	0.00294866
2004-07-15 20:00:00	0.00184291
2004-07-15 21:00:00	0.000737164
2004-07-15 22:00:00	0.000368582
2004-07-15 23:00:00	0.000368582





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