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[EnergyPlus_Support] **Severe"" Node Connection Error

Hello All,

I am back in the saddle again running some energy plus models and I am getting a few warnings and a severe error.  Could you please provide some incite for solving the node connection error.  I hope resolving this problem will solve the other warnings.



Program Version,EnergyPlus, 9/17/2012 4:03 PM,IDD_Version
   ************* Beginning Zone Sizing Calculations
   ************* Beginning System Sizing Calculations
   ** Warning ** In calculating the design coil UA for Coil:Cooling:Water ZONE 1 -- OFFICES COOLING COIL
   **   ~~~   ** no apparatus dew-point can be found for the initial entering and leaving conditions;
   **   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
   **   ~~~   ** The initial design conditions are: Tair,in = 26.3812
   **   ~~~   **                                    Wair,in = 1.210141E-002
   **   ~~~   **                                    Twater,in = 7.2200
   **   ~~~   **                                    Tair,out = 14.0000
   **   ~~~   **                                    Wair,out = 8.000000E-003
   **   ~~~   ** The revised design conditions are: Tair,out = 12.7020
   **   ~~~   **                                    Wair,out = 8.524276E-003
   ************* Testing Individual Branch Integrity
   ** Warning ** There are orphaned Branches in input
   ************* All Branches passed integrity testing
   ************* Testing Individual Supply Air Path Integrity
   ************* All Supply Air Paths passed integrity testing
   ************* Testing Individual Return Air Path Integrity
   ************* All Return Air Paths passed integrity testing
   ** Severe  ** Node Connection Error, Node="PLANTTOWER CNDW INLET", Inlet node did not find an appropriate matching "outlet" node.
   **   ~~~   ** If this is an outdoor air inlet node, it must be listed in an OutdoorAir:Node or OutdoorAir:NodeList object.
   **   ~~~   ** Reference Object=BRANCH, Name=PLANTTOWER CNDW BRANCH
   ** Warning ** Potential Node Connection Error for object COOLINGTOWER:SINGLESPEED, name=PLANTTOWER
   **   ~~~   **   Node Types are still UNDEFINED -- See Branch/Node Details file for further information
   **   ~~~   **   Inlet Node : PLANTTOWER CNDW INLET
   **   ~~~   **   Outlet Node: PLANTTOWER CNDW OUTLET
   ************* There were 2 node connection errors noted.
   ************* Beginning Simulation
   ************* There are 1 unused objects in input.
   ************* Use Output:Diagnostics,DisplayUnusedObjects; to see them.
   ************* There are 4 unused schedules in input.
   ************* Use Output:Diagnostics,DisplayUnusedSchedules; to see them.
   ************* ===== Final Error Summary =====
   ************* The following error categories occurred.  Consider correcting or noting.
   ************* Node Connection Errors
   ************* ..Node connection errors are often caused by spelling mistakes in a node name field.
   ************* ..To track down the problem, search the idf file for each node name listed to see if it
   ************* ..occurs in the expected input fields.
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Completed Successfully-- 3 Warning; 1 Severe Errors; Elapsed Time=00hr 01min  2.07sec


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