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Re: [EnergyPlus_Support] Error with cooling coils
If the error occured only once or just a small number of times, then you can
ignore it. If you are using SETPOINT MANAGER:OUTSIDE AIR to reset the chilled
water temperature as a function of outdoor dry bulb temp, then there is a known
problem which can cause these error to occur, but only for a few iterations
early in the simulation which should not impact the results at all.
Mike
On 4 Feb 2008 at 12:57, Zhen Tian wrote:
> Dear all,
>
> I had the following error when I modeled 2 VAV systems with radiant cooling.
> Among them, one VAV systems reported the the error below. Although two air
> systems has the same configuration. Only one VAV system has this error. Both the
> cooling coils are set as "reverse" action.
>
> The simulation can get run through to the end with results. I am wondering
> whether this error matter to my simulation result and I can just ignore it.
>
> Thanks.
>
> Regards,
>
> David
>
> ** Severe ** FindRootSimpleController: Controller error for controller = AHU1
> COOLING COIL CONTROLLER
> ** ~~~ ** Occurrence info=CALGARY INT'L AB CAN WYEC2-B-25110
> WMO#=718770, 01/13 14:39 - 14:40 ** ~~~ ** 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 = 17.60 [C] ** ~~~ **
> Controller actuator mass flow rate set to 2.29 [kg/s] ** ~~~ **
> Controller actuator temperature = 18.89 [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
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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