User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
33.8 OTHER INFORMATION ABOUT THE DEFROST
If the unit is configured with one condenser see parameter FA05:
0= common condenser;
1= separated condensers.
For FA05=0, common condenser, the defrost of the two circuits starts at the same time.
ATTENTION
Before starting the 3
rd
phase, the dF06 counting (time delay between two circuits defrost) must be expired.
ATTENTION
When the parameter dF01=1 (defrost managed by temperature/pressure), if the defrost ends for maximum defrost time or with the end
defrost contact, the bottom display will show, alternated with the normal measurement value, the label b1dF (circuit n°1) or b2dF (circuit
n°2) labels to indicate the defrost end alarms.
33.9 DEFROST BY CONDENSER FAN
DEFROST BY CONDENSER FANS
If dF01 = 4 defrost is activated throug condenser fans.
If the temperature detected by the probe configured as external air temperature is > dF25 parameter, the compressor is stopped and the
condenser fan is activated. The defrost ends:
• if the combined defrost is active: for temperature or max time
• if only NTC probes are configured: for temperature or maximum time
• if only pressure probes are configured: for maximum time
ATTENTION:
also if the defrost through condenser fan is activated, if the external temperature is < dF25, 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 > dF25 parameter.
ATTENTION:
With defrost with only ventilation enabled the forced defrost is always with hot gas.
33.10 END DEFROST BY LOW WATER OUTLET EVAPORATOR TEMPERATURE
To enable the function is necessary configure a probe by parameter dF27:
dF27=0 Function disabled
dF27=1 PB1 probe
..
dF27=6 PB6 probe
During the defrost when the temperature detected by the probe is lower than dF28 set point the defrost is aborted.
The defrost doesn’start if the temperature detected by the probe is lower than dF28.
The function is disabled if:
• dF27=0
• forced defrost enabled (in this case the parameter dF27 is not considered)
33.11 DEFROST PARAMETER DESCRIPTION
ATTENTION IT IS NOT POSSIBLE TO DO MODIFY THE DEFROST PARAMETERS WHEN THE DEROST CYCLE IS RUNNING.
dF01 Defrost mode
0 = Defrost not enabled;
1 = Temperature/pressure defrost. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint.
The Defrost cycle end is determined by 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 end is determined by the maximum duration dF05.
3 = Defrost from digital input. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint. (see
start probe par. dF24) The Defrost cycle end is determined by the active digital input.
4 = Defrost with condeser fan
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.