[TRNSYS-users] Problem in Using Control Type 166 (Simple Thermostat)

[Jeff Thornton]

Sajid,

You say the cooling setpoint is higher than the heating setpoint and enclose a screen capture of the connection showing the INITIAL temperatures of the heating and cooling setpoints at 20 and 24.  But these inputs are connected to equations and I’m guessing the value of these equations causes the heating setpoint to be higher than the cooling setpoint at an iteration.  Try tracing the thermostat model to verify the inputs or trace the equations.  Be aware that turning on the TRACE feature often leads to voluminous output so make sure to turn it back off after you identify the problem.

Jeff - TESS

Sent from my iPhone

> On Apr 4, 2019, at 6:19 AM, MEHMOOD Sajid via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
> 
> Hi Dear All,
> 
> I am trying to  recreate model (given in Tutorials of Trnsys, as shown in attached figure). 
> When i run simulation i am facing this error.
> 
> Error in Unit 25 (Type 166) which is simple thermostat. 
> 
> Trnsys message 126 : The reference unit has a bad input value.
> Reported information: Input no.3, The cooling setpoint must be higher than the heating setpoint.
> 
> But it is already higher in my model(see attached snaps). 
> 
> Please suggest me something to get it fix.
> 
> Many thanks.
> 
> Sajid
> The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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