plug-in
Cod. +030221881 rel. 1.5 - 26/10/10
22
r3: enable alarm ED
For models Y, X, C. With
r3
=1, the alarm is enabled and indicates end defrost due to the maximum time being reached.
Warning
: for the model S with defrosting enabled (
H1
=1), the alarm is not present in that the operation is by time only with
compressor off. If required, the value set via the serial connection must be 0.
Def.: 0 alarm ED inhibited.
r4: Automatic set point variation in night-time operation.
This parameter is part of the “curtain switch” parameters; when the curtain is closed (and as a consequence the digital input
connected to the curtain switch is closed), the controller automatically increases or decreases the set point by the value assigned to
r4 , in direct mode (cooling), and automatically the set point by the value assigned to ‘r4’.
rL: direct/reverse operating mode
(
note:
only valid for models S*A)
Used to select the “Operating mode”, between Direct (cooling) and Reverse (heating).
rL = 0 Direct operation (cooling)
rL = 1 Reverse operation (heating)
4.6
c = compressor management parameters
compressor parameters
type min max
uom
def
C0 compressor start delay at instrument on
C
0
15
min
0
C1 minimum time between 2 successive starts of the
compressor
C 0 15 min 0
C2 minimum compressor off time
C
0
15
min
0
C3 minimum compressor on time
C
0
15
min
0
C4 duty setting (compressor safety, 0=OFF,100=ON)
C
0
100
min
0
Cc continuous cycle duration
C
0
15
hours
4
C6 alarm bypass after continuous cycle
C
0
15
hours
2
Tab. 4.6.1
c0: start delay of the compressor and the fans (if managed) at instrument on
At the moment the control is turned on, the start-up of the compressor and evaporator fans is delayed by a time (minutes) equal to
the value assigned to this parameter. This delay allows the compressor to be protected against repeated starts in the case of
frequent voltage drops or power failures. For example, setting
c0
=6 forces the compressor to wait 6 minutes before starting from
when the power returns. In the case of systems with more than one compressor, parameter C0 can also be used to avoid
simultaneous start-ups of the units, simply by setting each compressor a different value for C0.
Def.:
c0
=0 (no minimum delay for the activation of the compressor
when the instrument is turned on).
Available on all models
Fig. 4.6.1
c1: minimum time between 2 successive starts of the compressor
Sets the minimum time (in minutes) that must elapse between two start-ups of the compressor, irrespective of the temperature and
the set point. Setting this parameter can limit the number of activations per hour. For example, if the maximum number of
activations allowed per hour is 10, simply set
c1
=6 to ensure this limit is respected.
Def.:
c1
=0 (no minimum time between two activations).
Available on all models.
Fig. 4.6.2
t
t
