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Eva,<br>
Quite a long time ago, there was a bug in Type668 that caused there
to be a power output even when the device was off. However, this was
fixed in 2005. You should contact your distributor and make sure
that you have a more recent version. Also, Type668 has two control
signals; one for heating and one for cooling. Make sure that both
are switched to OFF.<br>
Best,<br>
David<br>
<br>
<div class="moz-cite-prefix">On 8/21/2012 10:56, Eva gklezakou
wrote:<br>
</div>
<blockquote
cite="mid:CA+Ci=p814+4OFLvwvNHmGyJLH=7OC=5iyXivAY1KuKPkRDk7TQ@mail.gmail.com"
type="cite"><span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Dear
Sirs,</span>
<div
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)"><br>
<div>I think that something going wrong with the control signal
of the type 668 because even though the signal from the
controller is 0 and for this reason both COP (output of type
668) of the heat pump and the heat transfer to load (output of
type 668) are 0 the heat pump power is not 0. </div>
<div>Thank you for your help. </div>
<div><br>
</div>
<div>Regards,</div>
<div>Eva </div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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