What does "malformed zone" mean?

asked 2021-03-18 15:39:18 -0600

updated 2021-03-18 15:40:18 -0600

I have re-created this (and two other spaces) several times. After I get one space re-created, this error pops up on another space. The error is now occuring AGAIN on the first space I re-created. It seems I am going in circles. Can anyone tell me what this means and/or how to solve it?

* Severe * CalcHeatBalanceInsideSurf: The temperature of -388775.59 C for zone="THERMAL ZONE: ATTIC-MECH-NORTH", for surface="SURFACE 3" * ~~~ * ..is very far out of bounds during warmup. This may be an indication of a malformed zone. image description

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I can't tell from the screenshot. Is the surface selected in SketchUp (the large trapezoid) actually "SURFACE 3" or is surface three possibly a small sliver with minimal area?

David Goldwasser ( 2021-03-18 15:51:44 -0600 )edit

Thanks for looking at this. Yes, the arrow is pointing to the large trapezoid. My geometry is very basic. Each space is four walls with roof and ceiling. I had this set up with ideal air loads, but no cooling thermostat schedule since there is no cooling on this building. Ultimately, I decided to add a cooling thermostat schedule and the problem went away. At any rate, -388775°C is an unrealistic number. I suspect there is something wrong with the program or the error code should be more descriptive.