1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10
IC200D
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ATTENTION:
also if the defrost through condenser fan is activated, if the external temperature < dF26, the defrost is
through hot gas (compressor ON).
If dF17 = 2 during dripping time (dF08 if different from 0) the ventilation is forced for the time set on dF08
only if the temperature detected by the probe configured as external temperature is > of the Par. dF26 value.
ATTENTION:
With defrost with only ventilation enabled the forced defrost is always with hot gas.
37.9 DEFROST PARAMETER DESCRIPTION
ATTENTION
IT IS NOT POSSIBLE TO DO MODIFY THE dF PARAMETERS WHEN THE DEROST
CYCLE IS RUNNING.
dF01
Defrost mode
0 = Defrost not enabled;
1 = Temperature/pressure defrost. The dF09 “Time delay to defrost” starts to decrease when the
temperature/pressure decreases under the dF02 setpoint.
The defrost ends when pressure/temperature reaches the end defrost temperature/pressure.
2
=
Time duration defrost. The dF09, time delay to the defrost, starts when the temperature decreases under
the dF02 setpoint (see start probe par. dF24). The defrost cycle ends after dF05 minutes.
3 = Defrost starts when the temperature/pressure decreases under the dF02 setpoint (see start probe par.
dF24) and stops when the digital input configured as “digital input to start defrost” is active. The delay dF09
“Time delay to defrost” starts when the temperature decreases under the dF02 set point. The Defrost cycle
ends when the digital input is active.
4 = Defrost with condenser fan
5= Defrost starts if the digital input configured as “digital input to start defrost” is active and ends when
pressure/temperature reaches the end defrost temperature/pressure.
dF02
Temperature / pressure to begin the time counting to next defrost.
It allows to program a setpoint under which the dF09 starts counting.
dF03
Temperature / pressure to end the defrost.
It allows to program a temperature/pressure setpoint value to determines the end of the defrost when the
probe value is rising.
dF04
Minimum duration of the defrost
It determines the minimum defrost time duration after starting the defrost itself even if the conditions are not
more satisfied.
dF05
Maximum duration of the defrost
If dF01=2, it determines the maximum duration of the defrost and even if, for the other cases, the end
defrost condition are still to be satisfied.
dF06
defrost delay time between the 1
st
and the 2
nd
circuit.
After the interval dF09 determined by the defrost request of one of the circuits the other 2
nd
circuits must wait
also the time dF06 before defrosting.
dF07
Compressor off time before the defrost (the led of the compressor is blinking)
After the dF09 delay and before activating the defrost, the compressors are stopped for the dF07 time.
Exactly in the middle of the dF07 time the 4-way valve is activated to equalise the pressure of the unit and when dF07 is completely
expired the compressors and the defrost can start.
This procedure does not respect the compressor on delay protection therefore the compressor is
immediately turned off and then on. If dF07 = 0 the compressor is not stopped and the 4-way valve is
immediately turned.
dF08
Compressor off time after the defrost (the led of the compressor is blinking)
After the defrost cycle the compressors are stopped for the dF08 time.
Exactly in the middle of the dF07 time the 4-way valve is activated to equalise the pressure of the unit and to
drain the external exchange unit, when dF08 is completely expired the unit restart in heat pump mode.
This procedure does not respect the compressor on delay protection therefore the compressor is
immediately turned off and then on. If dF08 = 0 the compressor is not stopped and the 4-way valve is
immediately turned.
DF09
Delay time to next defrost
It starts when the condensing/evaporating temperature/pressure probe value is lower than dF02 setpoint.
This time is reloaded if the power supply fails, after a defrost cycle or from a digital input request of defrost.
The time counting is interrupted if the compressor is turned off or if the temperature/pressure is higher then
dF02.
dF10
Temperature setpoint to start a combined defrost of the circuit #1.
It allows to set a temperature value to determines the beginning of a combined defrost.
