Operating Principle - Kokido K2O K880BX/EU Manuel D'utilisation

Operating Principle

Temperature controlling
Temperature controlling point is controlled by "setting temperature (F11, or press the "set" key for
some time to set)" and "temperature difference (F12)". The controller begins to heat when the
temperature of the temperature sensor is under "setting temperature temperature difference", and
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it stops heating when the temperature is over "setting temperature temperature difference"
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Compressor delay time
The compressor delay time is set by F21, for example, 3 minutes. The controller contains a"
compressor halt calculagraph", and it begins to time when compressor stops, the program first check
the calculagraph before booting the compressor next time, the program will immediately boot the
compressor if the calculagraph reach 3 minutes ,if the calculagraph doesn't reach 3 minutes ,it will
boot again when the calculagraph reaches 3 minutes. Thus you can ensure that the boot alternation
is over 3 minutes after halt, so it can prevent to breaking the compressor as a result of frequent boot.
In addition, the controller doesn't boot the compressor within 3 minutes after turning on the power
supply, thus the compressor can also be protected in the state of power cut and then power on.
Auto defrosting principle
The controller first detects the temperature of evaporator when it begins to heat. If it is lower than
"defrost start temperature", the controller will first turn on defrosting, then turn on heating after
defrosting ends. In addition, the controller will supervise the temperature of outdoor machine when
heating normally, and decide whether need to defrost according to the time of the outdoor machine in
the continuous low temperature state. In other words, the defrosting calculagraph begins to time
when the outdoor machine temperature is lower than "defrost start temperature", and turns on the
defrosting when the value of time reaches "defrost start time". The calculagraph will be cleared if the
outdoor machine temperature is higher than "defrost start temperature" when timing, and it begins to
time again when the outdoor machine temperature is lower than "defrost start temperature" next time.
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