how to fix severe error=AirLoopHVAC:Unitary:Furnace:HeatCool = ZONE UNITARY FURNACE WITH DX COOLING

energyplus-example-file

asked 2019-06-28 09:06:00 -0500

congtran27
21 ●1

updated 2019-06-28 11:19:41 -0500

shorowit

10966 ●181 ●9 https://www.nrel.gov/b...

I implemented the Ex2, Tutorial Energyplus 9.1. But I met this error. I dont know how to fix it. Could you please give me a recommendation for solving this type of error?

---------------------Err report------------------
Program Version,EnergyPlus, Version 9.1.0-08d2e308bb, YMD=2019.06.28 22:57,
   ************* Beginning Zone Sizing Calculations
   ************* Beginning System Sizing Calculations
   ** Warning ** ManageSizing: For a plant sizing run, there must be at least 1 Sizing:Plant object input. SimulationControl Plant Sizing option ignored.
   ** Severe  ** AirLoopHVAC:Unitary:Furnace:HeatCool = ZONE UNITARY FURNACE WITH DX COOLING
   **   ~~~   ** Illegal Supply Air Fan Operating Mode Schedule Name = CONTINUOUS
   **  Fatal  ** Errors found in getting Furnace or Unitary System input.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=1
   ..... Last severe error=AirLoopHVAC:Unitary:Furnace:HeatCool = ZONE UNITARY FURNACE WITH DX COOLING
   ************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
   ************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 1 Warning; 0 Severe Errors.
   ************* EnergyPlus Terminated--Fatal Error Detected. 1 Warning; 1 Severe Errors; Elapsed Time=00hr 00min  0.52sec

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answered 2019-06-29 11:25:27 -0500

scheerd
1

When going through error reports, start at the top and fix the first one, then rerun the model, as most times many of the errors further down will be solved by the ones near the top. Warnings wont cause process termination, but may lead to other errors and very often to incorrect results.

I don't know the tutorial, but in this case, it appears that the error report pretty much tells you what to do. - If you are autosizing anything on the Plant side, the first Warning is relevant. - For the Furnace Severe error, take a look at the InputOutputReference and/or the EngineeringReference in the Documentation folder and do a search for that Furnace type to see what settings are valid for the Scedule, for example.

This general process for solving failures usually works pretty well.