Generic Alarm (i2F=EAL)
Digital Inputs • 13
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
as
the external digital input is disabled again. With the door
open, the high and low temperature alarms are disabled.
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
