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The following output variables should add up to the district heating and cooling:

Output:Variable,*,Zone Ideal Loads Supply Air Sensible Heating Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Zone Ideal Loads Supply Air Latent Heating Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Zone Ideal Loads Supply Air Sensible Cooling Energy,hourly; !- HVAC Sum [J] 
Output:Variable,*,Zone Ideal Loads Supply Air Latent Cooling Energy,hourly; !- HVAC Sum [J]

If there is no outdoor air in the ideal loads system, then these should also equal what it delivered to the zone:

Output:Variable,*,Zone Ideal Loads Zone Sensible Heating Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Zone Ideal Loads Zone Latent Heating Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Zone Ideal Loads Zone Sensible Cooling Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Zone Ideal Loads Zone Latent Cooling Energy,hourly; !- HVAC Sum [J]

Latent cooling can occur even when the Ideal Loads Dehumidification Control Type = None, because "For all options, the supply air humidity ratio will never be allowed to exceed saturation at the supply dry bulb temperature." (from I/O Ref for Dehumidification Control Type)

If this does not explain what is happening, then please reply here with a link to the idf file or send it to the EnergyPlus Helpdesk.