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12
OPERATION
Access to menu and information displayed.
•
Press and immediately release button
.
•
With button
or
select the data to be displayed.
•
Press button
to display value.
•
To exit from the menu, press button
or wait for 10 seconds.
Reset of THI, TLO, CND recordings
•
With button
or
select the data to be reset.
•
Display the value with button
.
•
While keeping button
pressed, use button
SETPOINT (display and modification of desired temperature value)
•
Press button
for at least half second to display the setpoint value.
•
By keeping button
pressed, use button
or
to set the desired value (adjustment is within the minimum
SPL
and the maximum
SPH
limit).
•
When button
is released, the new value is stored.
STAND-BY
Button
, when pressed for 3 seconds, allows the controller to be put on a stand-by or output control to be resumed (with
SB=YES
only).
KEYPAD LOCK
The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controllers is operating in a public place. In the I
NFO
menu, set parameter
LOC=YES
to inhibit all functions of the buttons. To resume normal operation of keypad, adjust setting so that
LOC=NO.
SELECTION OF SECOND PARAMETER GROUP
It’s possible to select control parameters between two different pre-programmed groups, in order for the fundamental control parameters to be adapted quickly to
changing needs. With
IISM=MAN
, changeover from Group I to Group II takes place manually by pressing button
for 2 seconds. The activation of Group
II is signalled by the lighting up of the relevant LED on the controller display. If
IISM=NON
, switchover to group II is inhibited.
DEFROST
Timed defrost.
Defrosting starts automatically when necessary time has elapsed to obtain the defrosting frequency set with DFR (IIDF). For example, with DFR=4
defrosting occurs once every 6 hours. The internal timer is set to zero when power is applied to the controller and at each subsequent defrost start. When the
controller is put on a standby, the accumulated time count is “frozen” (is not incremented).
Manual defrost. Defrosting may also be induced manually by keeping the button
pressed for 2 seconds.
Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to the parameters
DTY
and
OAU
. The AUX output is associated
to defrost function with
OAU=DEF
exclusively.
If
FID=YES
the evaporator fans are active all through defrost.
Defrost termination.
Defrost lasts as long as time
DTO
but, if the evaporator probe has been enabled (
T2=YES
) and temperature
DLI
is achieved before this
time elapses, defrost will be terminated in advance.
Resuming thermostatic cycle.
When defrost is over, if
DRN
is greater than 0, all outputs will remain off for
DRN
minutes, in order for the ice to melt completely
and the resulting water to drain. Moreover, if probe T2 is active (
T2=YES
), the fans will re-start when the evaporator gets to a temperature lower than
FDD
; Vice
versa, if such condition does not occur after 4 minutes following defrost termination, the fans will be switched on anyway.
Caution:
if
C-H=HEA
all defrost functions are inhibited; if
DFR=0
the timed defrost function is excluded; during defrost, the high temperature alarm is
inhibited.
CONFIGURATION PARAMETERS
•
To get access to the parameter configuration menu, press button
+
for 5 seconds.
•
With button
or
select the parameter to be modified.
•
Press button
to display the value.
•
By keeping button
pressed, use button
or
to set the desired value.
•
When button
is released, the newly programmed value is stored and the following parameter is displayed.
•
To exit from the setup, press button
or wait for 30 seconds.