[EnergyPlus_Support] Re: Cntroller input data problem.

["berlinclownfish" <SPlamp@xxxxxxxxxxxxxxxx>]

I've experienced the identical problem. The error relates to the 
arrangement of the AHU cooling coil installed prior the AHU heating 
coil. 

However, the arrangement in the AHU that I'm trying to model in fact 
has a reversed setup. This also means the reverse arrangement of each 
coil's controller in the class 'Air Distribution' under the 
tab 'CONTROLLER LIST' to comply with the simulation order.

In addition, when manually changing (I presume both of you created 
your input files with the help of a graphical interface) the order of 
both coils, you'll also have to change the inlet and outlet nodes on 
the remaining equipment (e.g. return fan, supply fan, etc.).

Regards,

Sandro


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "tjutw" <tjutw@...> wrote:
>
> Hi Everyone,
> 
> I also have the same problem.
> 
>  ** Severe  ** FindRootSimpleController: Controller error for
> controller = VAV SYS 2 COOLING COIL CONTROLLER
>    **   ~~~   **  Occurrence info=CALGARY INT'L AB CAN WYEC2-B-25110
> WMO#=718770, 01/31 09:00 - 10:00
>    **   ~~~   **   Controller function is inconsistent with user
> specified controller action = Reverse action
>    **   ~~~   **   Actuator will be set to maximum action
>    **   ~~~   ** Controller control type=Temperature
>    **   ~~~   ** Controller temperature set point = 17.20 [C]
>    **   ~~~   ** Controller sensed temperature = 17.37 [C]
>    **   ~~~   ** Controller actuator mass flow rate set to 5.71 
[kg/s]
>    **   ~~~   ** Controller actuator temperature = 7.00 [C]
>    **   ~~~   **   Note: Chilled water coils should be reverse 
action
> and the entering chilled
>    **   ~~~   **         water temperature (controller actuator
> temperature) should be below the setpoint temperature
>    **   ~~~   **   Note: Hot water coils should be normal action and
> the entering hot
>    **   ~~~   **         water temperature (controller actuator
> temperature) should be above the setpoint temperature
> 
> 
> I am also sure that the parameters for VAV SYS 2 COOLING COIL
> CONTROLLER are right, because most of time the program can run
> properly.  It seem many factors can affect this error message. For
> example, if  I add more internal heat in rooms, then this error
> message will not appear.  I found this just because I input the 
wrong
> values for internal heat.  
> 
> Tj Ywh
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "love9787m" <love9787m@>
> wrote:
> >
> > ** Severe  ** FindRootSimpleController: Controller error for 
> > controller = MAIN COOLING COIL CONTROLLER
> > In the error message, Controller sensed temperature is 22288.16 
[C].
> > I've never seen before like this problem and sensed temperature 
> > never reached this high temperature. 
> > To find out the method, which part or object should I sheckand
> > what is the reason for this problem?
> >    
> >  **   ~~~   **  Occurrence info=ULSAN - KOR IWEC DATA 
WMO#=471520, 
> > 07/03 05:40 - 05:41
> >    **   ~~~   **   Controller function is inconsistent with user 
> > specified controller action = Reverse action
> >    **   ~~~   **   Actuator will be set to maximum action
> >    **   ~~~   ** Controller control type=Temperature
> >    **   ~~~   ** Controller temperature set point = 15.00 [C]
> >    **   ~~~   ** Controller sensed temperature = 22288.16 [C]
> >    **   ~~~   ** Controller actuator mass flow rate set to 1.10 
> > [kg/s]
> >    **   ~~~   ** Controller actuator temperature = -120.36 [C]
> >    **   ~~~   **   Note: Chilled water coils should be reverse 
> > action and the entering chilled
> >    **   ~~~   **         water temperature (controller actuator 
> > temperature) should be below the setpoint temperature
> >    **   ~~~   **   Note: Hot water coils should be normal action 
and 
> > the entering hot
> >    **   ~~~   **         water temperature (controller actuator 
> > temperature) should be above the setpoint temperature
> >    ** Warning ** Calculated Humidity Ratio Invalid 
(PsyWFnTdbTwbPb)
> > 
> > Please let me know the reason and method.
> > Thank you in advance.
> >
>




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