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[EnergyPlus_Support] questions on a 5-zone UFAD model

Dear all, 

I am working on a 5-zone (3000 sf) UFAD model, and got a few 
questions regarding the simulation results. 

1) There are a lot "heating set-point not met" hours (~2000) for all 
5 zones. I wonder which air temperature is this report comparing 
with the set-point temperature? 

2) There is a recurring warning, which says "Hot Water flow control 
failed in VS VAV terminal unit zone3 VAV reheat". (This error 
occurred 156 times. Iteration limit (500) exceeded in calculating 
the hot water flow rate.) I feel that this should contribute to the 
first problem. But this may not be the only reason, since other 
zones without the recurring warning also have under heated hours. 
Any suggestions on how to fix this? 

3) Another warning I got is "The design coil load is zero for 
COIL:Water:SimpleHeating MAIN HEATING COIL". What could be wrong for 
this one? 

I would appreciate it if you could provide any suggestions. Thank 
you all for your help!

Regards, 

Anna 


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