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8
Digital Inputs
The first digital input 18-20 is enabled with P3P =
n. With P3P = n and i1F = i2F, the second digital in-
put is disabled. The free voltage digital inputs are pro-
grammable by the i1F and i2F parameters.
8.1. Generic Alarm
(i2F=EAL)
As soon as the digital input is activated, the unit
will wait for the did time delay before signaling the
EAL alarm message. The outputs status do not
change. The alarm stops just after the digital input is
deactivated.
8.2. Serious Alarm Mode
(i2F=bAL)
When the digital input is activated, the unit will
wait for the did delay before signaling the CA alarm
message. The relay outputs are switched OFF. The
alarm will stop as soon as the digital input is deacti-
vated.
8.3. Pressure Switch
(i2F=PAL)
If the pressure switch has reached the number of
activations (cycles) of the nPS parameter during the
interval time set by the did parameter, the CA pres-
sure alarm message will be displayed. The compres-
sor and the regulation are stopped. When the digital
input is ON, the compressor is always OFF. If the nPS
activation in the did time is reached, switch the con-
troller OFF and ON to restart normal regulation.
8.4. Door Switch Input (i1F
or i2F=dor)
This input signals the door status and the corre-
sponding relay output status through the Odc param-
eter: no, Fan = normal (any change); CPr; F_C =
Compressor OFF.
14 • XR35CX I&O Manual
Since the door is opened, after the delay time set
through the parameter doA, the door alarm is enabled,
the display shows the message dA and the regulation
restarts is rtr = yES. The alarm stops as soon as the
external digital input is disabled again. With the door
open, the high and low temperature alarms are dis-
abled.
8.5. Start Defrost (i1F or
i2F=dEF)
If conditions are favorable for defrost, a defrost
will be started. After the defrost is finished, the nor-
mal regulation will restart only if the digital input is
disabled, otherwise the controller will wait until the
MdF safety time is expired.
8.6. Switch the Auxiliary
Relay (i2F=AUS)
With oA1 = AUS, the digital input switches the
status of the auxiliary relay.
8.7. Inversion of the Kind of
Action: Heating-
Cooling (i2F=Htr)
This function enables the controller to invert the
regulation of the controller: from cooling to heating
and vice versa.
8.8. Energy Saving (i2F=ES)
The Energy Saving function allows you to change
the setpoint value as the result of the SEt + HES (pa-
rameter) sum. This function is enabled until the digi-
tal input is activated.
8.9. Holiday Defrost
(i2F=HdF) - Only for
Models with RTC
This function enables the holiday defrost setting.
026-1203 Rev 3 03-FEB-2015
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