Carel MPXone series - Page 64

ENG
Staggered defrosts
The function is used to perform a series of daily defrosts by setting just the first using parameter td1 and
then indicating the number of defrosts per day using parameter d1S. The controller automatically
schedules all the defrosts to be performed at regular intervals over the 24 hours following the event
defined by td1. The same applies to td2 and d2S.
Code Description Def Min Max UOM User
User
terminal
d1S
Number of daily defrosts (td1)
0 = Disabled
5 = 4 ore 48
minutes
10 = 2 hours and 24
minutes
1 = 24 ore 0
minutes
6 = 4 ore 0 minutes
11 = 2 hours and 11
minutes
2 = 12 ore 0
minutes
7 = 3 ore 26
minutes
12 = 2 hours and 0
minutes
3 = 8 ore 0
minutes
8 = 3 hours and 0
minutes
13 = 1 hour and 0
minutes
4 = 6 ore 0
minutes
9 = 2 hours and 40
minutes
14 = 30 minutes
0 0 14 - S NO
d2S Number of daily defrosts (td2) - see d1S 0 0 14 - S NO
Remember that the sub-parameter “d_” of td1 (td2) defines the defrost day, as follows:
d_ = Defrost - day
0 = event disabled 9 = from Monday to Saturday
1 to 7 = Monday to Sunday 10 = Saturday & Sunday
8 = Monday to Friday 11 = every day
Note:
l if event td1 includes a series of days, the programming always ends at 24.00 on the last day. If
event td1 includes one day only, the programming ends at 24.00 on the same day;
l if both td1 and td2 are set, when the defrost events overlap, only the sequence of defrosts that
start first are performed..
Start/ end defrost synchronised by Master (par. d2, d3)
Code Description Def Min Max UOM User
User
terminal
d2
End defrost synchronised by Master
0/1 = not synchronised/synchronised
1 0 1 - S NO
d3
Send network start defrost command (for Master)
0/1: yes/no
Ignore network start defrost command (for Slave)
0/1: no/yes
0 0 1 - S NO
The parameter determine whether or not, in a local network, MPXone awaits a start/end defrost signal
from the Master at the start/end of the defrost.
End defrost signal by timeout (par. r3)
Code Description Def Min Max UOM User
User
terminal
r3
End defrost signal by timeout
0/1 = disabled/enabled
0 0 1 - S NO
For defrosts that end by temperature (d0=0) , this enables the end defrost by timeout signals Ed1 and
Ed2.
64|5. Functions
MPXone +0300086EN rel. 1.0– 04.09.2018