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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Dear Mr. Saeid</span><span lang=AR-SA dir=RTL style='font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I have modeled an air-to-air heat pump and it runs throughout the year with no problem. Your error seems strange. I am afraid you have a problem with the fundamentals of TRNSYS.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>From the way you are posting your question, it seems you are quite a beginner in TRNSYS. What do you mean when the system shifts to cooling mode? You mean when the time comes that the building needs cooling? What is the error? If you share your file or at least the error, we may be able to see what is going on. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hooman Azad<o:p></o:p></span></p><p class=yahoo-quoted-begin style='margin-top:0in'><span style='font-size:11.5pt;color:#715FFA'><o:p> </o:p></span></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div id=yiv1523769221><div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>Dear users;<br clear=all><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>I have modeled a water-to-water heat pump which is connected to a fan coil (type 600). The fan coil is connected to a building (Type 56).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>for connection, I defined input as ventilation. When the system shifts to cooling mode, the system gives an error and stops suddenly. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>I have another question regarding the ventilation inputs for fan coil:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>In "supply air conditioning" fan coil is an "external by other component" or internal calculation? <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p></div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal><i><span style='font-size:9.5pt;color:black'>Best Regards</span></i><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><i><span style='color:black'>Saeid Mohammadzadeh Bina, Dr. (Eng.)</span></i><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><i><span style='font-size:9.5pt;color:#222222'>-------------------------------------------------</span></i><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><em><span style='font-family:"Helvetica",sans-serif;color:black'>Akita University</span></em><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-family:"New serif",serif;color:black'>Graduate school of International Resource Sciences</span></i><em><span style='font-family:"Helvetica",sans-serif;color:black'>.</span></em><i><span style='font-family:"Helvetica",sans-serif;color:black'><br><em><span style='font-family:"Helvetica",sans-serif'>1-1 Tegata gakuen-machi, Akita 010-8502, Japan</span></em></span></i><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><em><span style='font-family:"Helvetica",sans-serif;color:black'>Tel: </span></em><em><span style='font-family:"New serif",serif;color:black'>+815068665026 (Japan)</span></em><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><em><span style='font-family:"New serif",serif;color:black'> +989141011757 (Iran) </span></em><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><em><span style='font-family:"Helvetica",sans-serif;color:black'>E-mail: </span></em><a href="mailto:s.mohammadzadeh66@gmail.com" target="_blank"><em><span style='font-family:"Helvetica",sans-serif'>d9515254@s.akita-u.ac.jp</span></em></a><em><span style='font-family:"Helvetica",sans-serif;color:black'> </span></em><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><em><span style='font-size:13.5pt;font-family:"Garamond",serif;color:blue'> </span></em><a href="mailto:mohammadzadehsaeid@yahoo.com" target="_blank"><i><span style='font-size:13.5pt;font-family:"Garamond",serif'>mohammadzadehsaeid@yahoo.com</span></i></a><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><i><span style='font-family:"Helvetica",sans-serif;color:black'>-------------------------------------------------</span></i><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal>_______________________________________________<br>TRNSYS-users mailing list<br><a href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a><br><a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></p></blockquote></div></body></html>