1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10
IC200D
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ATTENTION
The condenser fan is controlled by the condensing probe even if the evaporator probe is present and
configured.
The phase 4 lasts at least dF04 time; phase 4 ends:
1. If dF01=1:
the combined probe is higher than dF11 of the 1
st
circuit;
the combined probe is higher than dF13 of the 2
nd
circuit;
when the condensing temperature/pressure is higher than dF03
2. If dF401=2: when dF05 counter is elapsed
3. If dF01=3: when the digital input configured as end defrost is deactivated
PHASE 5
If dF08 = 0 the reversing valve is switched without stopping the compressors and the defrost ends.
If dF08 > 0:
1. All the compressors are switched off
2. After dF08 / 2 reversing valve is de-activated
3. After dF08 / 2 the heat pump regulation can restart
37.2 END OF DEFROST FOR MAXIMUM TIME
If the defrost ends for maximum time and not for achievement of the conditions of end defrost, a specific
alarm is signalled (b1dF or b2dF appears on the display).
AL88 parameter sets the maximum number of alarms:
• if the number of alarms is lower than AL88, the alarm reset is automatic and does not affect the normal
regulation
• if the number of alarms reaches AL88, the alarm reset is manual and the affected circuit is locked
37.3 OTHER INFORMATION ABOUT THE DEFROST
If the unit is configured with one condenser FA05=0, 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.
If the defrost ends because of the dF05 counting (Maximum defrost time) and the dF02 configuration or with
the end defrost contact, the bottom display will show, alternated with the normal measurement value, the
label
b1dF
(circuit #1) or
b2dF
(circuit #2) labels to indicate the defrost end alarms.
37.4 FORCED DEFROST
The function is enabled if the parameter dF19>0. It allows to make a forced defrost cycle even if the dF09
timeout counting is not expired, when the condensing/evaporating temperature/pressure is lower than dF20
setpoint for the dF19 time counting.
If during the dF19 time counting the condensing/evaporating temperature/pressure rises above the value
dF20+dF21 (set+differential) the function is disabled and the tF19 time is reloaded.
ATTENTION
: the forced defrost is not related to the dF09 /dF06 delay times, therefore the forced defrost cycle, if condition are OK, is
immediately executed.
37.5 COMBINED DEFROST
The function is enabled if one of the digital input is configured as NTC temperature for combined defrost of
the 1st or 2nd circuit. This probe detects the external air temperature of the condenser (evaporator in heat
pump) and its temperature value determines the start and the stop of the defrost cycle.
Description:
The defrost count-down starts when the temperature/pressure of the probe, configured as
condensing/evaporating circuit 1 or 2 probe, is lower than dF02 parameter.
After the dF09 counting the instruments checks the temperature probe value (configured as combined
defrost circuit 1 or 2) and if it is lower than dF10 (temperature setpoint to start the defrost of the circuit 1) or
dF12 (temperature setpoint to start the defrost of the circuit 2) the defrost cycle starts, otherwise the unit still
runs in heat pump mode.
When the temperature decreases under the dF10 or dF12 values the defrost immediately start.
