Digital Inputs; Generic Alarm (I2F=Eal); Serious Alarm Mode (I2F=Bal); Pressure Switch (I2F=Pal) - Emerson Dixell XR75CX Series Installation And Operation Manual

8

Digital Inputs

The first digital input 18-20 is enabled with P3P = n.With
P3P = n and i1F = i2F, the second digital input is disabled.
The free voltage digital inputs are programmable 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 did time delay before signaling the EAL alarm 
message. The outputs status don't change. The alarm stops
just after the digital input is de-activated.
8.2. Serious Alarm Mode
(i2F=bAL)
When the digital input is activated, the unit will wait for
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 deactivated.
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 pressure alarm message will
be displayed. The compressor 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
controller OFF and ON to restart normal regulation.
8.4. Door Switch Input (i1F
or i2F=dor)
This input signals the door status and the corresponding 
relay output status through the odc parameter: no = normal
(any change); Fan = Fan OFF; CPr = Compressor OFF;
F_C = Compressor and fan OFF. Since the door is opened,
after the delay time set through parameter doA, the door
alarm is enabled, the display shows the message dA, and
the regulation restarts is rtr=Y. The alarm stops as soon
the external digital input is disabled again. With the door
open, the high and low temperature alarms are disabled.

Generic Alarm (i2F=EAL)

8.5. Start Defrost (i1F or
i2F=dEF)
A defrost will start if the right conditions exist. After the
defrost is finished, normal 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)
When oA2 = 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 allows 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 the setpoint value to be
changed as the result of the [SET+ HES] (parameter) sum.
This function is enabled until the digital input is activated.
8.9. ON - OFF Function
(i2F=onF)
Switches the controller ON and OFF.

8.10. Digital Inputs Polarity

The digital input polarity depends on the i1P and i2P 
parameters.
• i1P or i2P = CL: the input is activated by closing the
contact.
• i1P or i2P = OP: the input is activated by opening
the contact
as
Digital Inputs • 13