Openstudio failed when usingLow Temp Radiant Const Flow

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On this forum I have already read several articles on this topic. But I can't help it. My program failed every time I implement the Low Temp Radiant Const Flow.

Can someone tell me why my program failed and how to do it properly?

I use the low temperature to model floor heating.

Some information about the floor heating:

• constant temperature of 21 ° C

• my Internal source layer consists of (you can see this on the photo):

   reinforced concrete / foam / polyurethane / floating screed
  

here are some photos in openstudio:

This is the error that I get when using Low Temp Radiant Const Flow

 * Warning * Check input. Calc Pump Efficiency=2.15222E-002% which is less than 50%, for pump in radiant system LOW TEMP RADIANT CONST FLOW *** Beginning Plant Sizing Calculations * Warning * GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1 * ~~~ * Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 1". * ~~~ * Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2. * Severe * Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank * ~~~ * For Zone="THERMAL ZONE 1". * ~~~ * This field either needs to be filled in in this object or Sizing:Zone object. * ~~~ * For this run, default values for these fields will be used. * Warning * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 1", Zone="THERMAL ZONE 1". * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. * Warning * Output:Meter: invalid Key Name="DISTRICTCOOLING:FACILITY" - not found. * Warning * Output:Meter: invalid Key Name="DISTRICTHEATING:FACILITY" - not found. * Warning * Output:Meter:MeterFileOnly requested for "Electricity:Facility" (TimeStep), already on "Output:Meter". Will report to both eplusout.eso and eplusout.mtr *** Testing Individual Branch Integrity *** 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 *** No node connection errors were found. *** Beginning Simulation * Warning * GetSpecificHeatGlycol: Temperature is out of range (too high) for fluid [WATER] specific heat * * ~~~ * ..Called From:CalcSimpleHeatingCoil,Temperature=[137.06], supplied data range=[0.00,125.00] * ~~~ * Environment=BRUSSELS ANN HTG WIND 99.6% CONDNS WS=>MCDB, at Simulation time=01/21 00:00 - 00:10 * Warning * GetDensityGlycol: Temperature is out of range (too high) for fluid [WATER] density * * ~~~ * ..Called From:PlantPumps:CalcPumps: ,Temperature=[137.12], supplied data range=[0.00,100.00] * ~~~ * Environment=BRUSSELS ANN HTG WIND 99.6% CONDNS WS=>MCDB, at Simulation time=01/21 00:00 - 00:10 * Severe * Plant temperatures are getting far too hot, check controls and relative loads and capacities * ~~~ * Environment=RUN PERIOD 1, at Simulation time=05/20 20:40 - 20:50 * ~~~ * PlantLoop Name (SupplySide)= HOT WATER LOOP * ~~~ * PlantLoop Setpoint Temperature=67.0 {C} * ~~~ * PlantLoop Inlet Node (SupplySide) does not have a Setpoint. * ~~~ * PlantLoop Inlet Node (DemandSide) does not have a Setpoint. * ~~~ * PlantLoop Outlet Node (SupplySide) has a Setpoint. * ~~~ * PlantLoop Outlet Node (DemandSide) does ...