[EnergyPlus_Support] error msg

[alaa kandil <alaak1974@xxxxxxxxx>]

Dear sir,

I am running a simulation and having two kinds of exceeding iteration limits as below:

""1)
** Warning ** ControlCompOutput: Maximum iterations exceeded for ZoneHVAC:Baseboard:RadiantConvective:Water
   **   ~~~   ** ... Load met       = 24.85761 W.
   **   ~~~   ** ... Load requested = 21.65265 W.
   **   ~~~   ** ... Error          = 3.20496340 %.
   **   ~~~   ** ... Tolerance      = 0.10000000 %.
   **   ~~~   ** ... Error          = (Load met - Load requested) / MAXIMUM(Load requested, 100)
   **   ~~~   **  Occurrence info=Calgary Int'l AB CAN WYEC2-B-25110 WMO#=718770, 01/04 09:02 - 09:05

2)
** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC loops, at Calgary Int'l AB CAN WYEC2-B-25110 WMO#=718770, 01/09 07:30 - 07:33
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings;   to show more details on each max iteration exceeded.
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...550
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...600
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...650
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...700
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...750
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...800
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...850
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...900
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...950
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...1000
   ** Warning ** ControlCompOutput: Exceeding max iterations continues...1050""

My questions are:
Does the first warning mean Eplus failed to reach a solution within the tolerance?

Does the second warning mean Eplus ignored the maximum number of iterations and reached a solution after 1050 iteration?

Is it a good idea to increase the HVAC maximum iterations to the 1050 noted in the error message (some msgs was up to 13000)?? I know that decreasing time stem will help reaching converge with fewer iterations.. is that a better solution?? 

Thanks in advance


Alaa Kandil
Email: aakandil@xxxxxxxxxxx,alaak1974@xxxxxxxxx
mailing address :304 Jackson PL, NW,Calgary,t3b2v3
Cell No.:+1-403-818-5447
Phone No.:+1-403-282-9497

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