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Electrolux Premium Quick Reference Manual page 17

Thermoregulator management controller
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DIRECT Freddo
rd
D
Set Point
Fig. 7.a
Direct
St
rd/2
rd/2
Fig. 7.b
From ser. no.:
/A2: Confi guration of probe 2
Used to confi gure the operating mode of probe 2.
/A2= 0 => probe 2 absent
/A2= 1 => product probe (used for display only)
/A2= 2 => defrost probe
/A2= 3 => condenser probe
/A2 = 4 => antifreeze probe
In any case, probe 2 is used for calculating the virtual control probe.
Default: /A2= 2 => defrost probe; /A2= 0 on models M and S => probe 2 absent.
/A3: Confi guration of probe 3
As above, but relating to probe 3.
Important note:
Default: /A3= 0 => Probe 3/Digital input absent.
/C1: Calibration or off set for probe 1
/C2: Calibration or off set for probe 2
/C3: Calibration or off set for probe 3
These parameters are used to correct the temperature measured by the probes, using an off set: the value assigned to these
parameters is in fact added to (positive value) or subtracted from (negative value) the temperature measured by the probes. The
temperature value is corrected by the off set before checking if the reading is out-of-range.
Example:
to decrease the temperature measured by probe 1 by 2.3 degrees, set /C1= -2.3. The calibration or off set can be set
from -20 to +20.
Warning:
if the probe is disabled, the display shows '___' . If the probe is faulty, the display shows the corresponding error code.
When displaying the parameter, pressing SET shows the value of the corresponding probe already corrected with the off set, while
pressing SET a second time displays the abbreviated code.
Default: /C1=/C2=/C3=/C4=/C5=0 no off set.
7.2 Temperature control parameters
Code
St
rd
rn
rr
r1
r2
r3
r4
r5
rt
rH
rL
St: set point
Establishes the set point value used by the controller. Default: St=0.0.
rd: Control delta
Establishes the value of the diff erential, or hysteresis, used for temperature control. Low values guarantee an ambient temperature
that deviates only slightly from the set point, but involves frequent starts and stops of the main actuator (normally the compressor).
In any case, the compressor can be protected by suitably setting the parameters that limit the number of
activations/hour and the minimum OFF time (see the C parameters).
Note:
if control with two compressor steps has been selected ('H1, H5'=12, 13), the diff erential 'rd' is divided between the two
steps.
Default: rd =2
ON
rn: Dead band
attuatore
Establishes the value of the dead band, when the auxiliary output is selected as heating, in control with dead band mode. The
diff erential is in the centre of the dead band.
OFF
Sonda virtuale
Page:17
Ed.1" 08-2014
the input is enabled for use with a probe only if the parameter corresponding to digital input A4 is set to 0.
Parameter
Temperature set point
Control delta
Dead band
Reverse diff erential for control with dead band
Minimum set point allowed
Maximum set point allowed
Operating mode
Automatic night-time set point variation
Enable temperature monitoring
Temperature monitoring interval
Maximum temperature read
Minimum temperature read
Model
UOM
Type Min Max Def.
MSYF
°C/°F
F
r1
-SYF
°C/°F
F
0.1
-SYF
°C/°F
C
0.0
-SYF
°C/°F
C
0.1
MSYF
°C/°F
C
-50
MSYF
°C/°F
C
r1
-SYF
fl ag
C
0
MSYF
°C/°F
C
-20
MSYF
fl ag
C
0
MSYF
hours
F
0
MSYF
°C/°F
F
-
MSYF
°C/°F
F
-
560001 EG
Doc. No.:
r2
0.0
20
2.0
60
4.0
20
2.0
r2
-50
200
60
2
0
20
3.0
1
0
999
-
-
-
-
Tab. 7.c

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