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    <p>Ismail,</p>
    <p> You'd have to look at the list file to know for certain what the
      problem is but my guess is that the system isn't converging a lot
      of the time. I imagine that the zone RH goes above 70% so the fan
      turns on, at which point the zone RH drops below 70% so the fan
      turns back on, which makes the zone RH go back above 70%. You need
      to make sure that you're using a controller that has hysteresis (a
      deadband) and that you are using a short timestep (one minute
      perhaps).</p>
    <p>kind regards,</p>
    <p> David</p>
    <p><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 07/12/2017 04:27, Ismail OUHALLOU
      via TRNSYS-users wrote:<br>
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    <blockquote type="cite"
cite="mid:CAA779b3n7091=gaUu2gvw1GddF+gRFY4sKz6m8weSGU4cBb3WQ@mail.gmail.com">
      <div dir="ltr"><img class="mailtrack-img" alt=""
src="https://mailtrack.io/trace/mail/7733c2ac7e08a4bf082074c3e8fef684d137e0cb.png?u=633613"
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        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">Dear
          Tnsys users,</div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)"><br>
        </div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">I
          want to simulate an AHU building integrated using type 112b.
          Control signal of type 112b is: The fan (type 112b) is to be
          ON if the relative humidity of a zone is greater than 70%.</div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">When
          I run simulation, it gets blocked at a given time as shawn in
          figure below:</div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)"><img
            src="cid:part2.B7F04D82.5F27A10F@tess-inc.com" class=""
            height="303" width="544"><br>
          ​<br>
        </div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">Where
          does the problem come from ?</div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)"><br>
        </div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">Thanks
          in advance</div>
        <div class="gmail_default"
          style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">Ismail</div>
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        -- <br>
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                                      <div dir="ltr"><i
style="font-size:10.6667px;color:rgb(0,0,0);font-family:Arial,sans-serif">************************************************</i></div>
                                      <div dir="ltr"><i
style="font-size:10.6667px;color:rgb(0,0,0);font-family:Arial,sans-serif">Ismail
                                          OUHALLOU</i><br>
                                      </div>
                                      <div dir="ltr">
                                        <div><font face="Arial,
                                            sans-serif" color="#000000"><span
style="font-size:10.6667px">Green building & Sustainability
                                              consultant</span></font></div>
                                        <div><br>
                                        </div>
                                        <div><font face="Arial,
                                            sans-serif" color="#000000"><span
style="font-size:10.6667px"><b>Morocco</b></span></font></div>
                                        <div><span
style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:10.6667px">P:+212<b>
                                            </b>620<b> </b>548<b> </b>116</span></div>
                                        <div><font face="Arial,
                                            sans-serif" color="#000000"><span
style="font-size:10.6667px">F:+212<b> </b>522<b> </b>326<b> </b>440</span></font></div>
                                        <div><a
                                            href="mailto:i.ouhallou@trusted-energy.com"
                                            target="_blank"
                                            moz-do-not-send="true"><font
style="background-color:rgb(238,238,238)" size="1">i.ouhallou@trusted-energy.com</font></a><br>
                                        </div>
                                        <div><a
                                            href="mailto:issmail.ouhallou@gmail.com"
                                            target="_blank"
                                            moz-do-not-send="true"><font
style="background-color:rgb(238,238,238)" size="1">issmail.ouhallou@gmail.com</font></a><br>
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      <pre wrap="">_______________________________________________
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    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>

<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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