2EWPX 195(/E) 6/97 ing
key on the front panel; the relay will be dis-
abled and the led will blink until the end of
the alarm condition.
DISPLAYING PROBE VALUES
The instrument provides two probe inputs:
temperature control and defrost manage-
ment.
The pressure and release of the “UP” and
“SET/DOWN” keys simultaneously causes
the label “CPr” (Compressor Probe) to be
displayed; by pressing and releasing the
“SET/DOWN” key the display shows the
value on the control probe.
By pressing the “UP” key the display will
show label “EPr” (Evaporator Probe); by
pressing and releasing the “SET/DOWN”
key the display shows the value of the
probe for control of the evaporator fans.
KEYBOARD LOCKING
A special programming of the “Loc” para-
meter allows to disable the keyboard in or-
der to avoid unauthorised operations or
parameter changes.
When the keyboard is disabled the
Setpoint and the parameters can only be
displayed (not changed), except parameter
“Loc” to allow keyboard release.
PASSWORD TO ACCESS
PARAMETER PROGRAMMING
A password can be set to allow access to
the parameter programming phase. To set
(or change) the password access parame-
ter “PAS” and type a number from 1 to 15
(0 to disable the password). The password
will be enabled when exiting from the pa-
rameter programming phase.
In case the password is enabled, when re-
questing access to the parameter pro-
gramming phase the label “PAS” is
displayed. Press the “SET/DOWN” key to
access password programming and
change it using keys “UP” and
“SET/DOWN”. If the password is correct
the pressure of keys “SET/DOWN” and
then “UP” enables access to the program-
ming phase, otherwise it will automatically
quit.
PARAMETERS PROGRAMMING
The programming phase can be accessed
pressing the “UP” and “SET/DOWN” keys
simultaneously for more than 7 seconds.
The first label is displayed and the “SET”
led starts blinking. To access other para-
meters press “UP” or “SET/DOWN”; to
display the value of the parameter shown
on the display press “UP” and
“SET/DOWN” simultaneously. To change
its value press “UP” or “SET/DOWN”.
The storage of new values takes place au-
tomatically when exiting the programming
mode (no key pressed for some seconds).
PARAMETERS DESCRIPTION
diF: diFferential.
Setpoint intervention differential.
For applications in the field of refrigeration
the differential shall be set to positive val-
ues; the compressor will stop when the
Setpoint is reached (according to the con-
trol probe) and start again when the tem-
perature reaches the Setpoint plus the
differential.
LSE: Lower Set.
Minimum value that can be assigned to
Setpoint.
Usually set to the minimum value measur-
able by the probe.
HSE: Higher Set.
Maximum value that can be assigned to
Setpoint.
dty: defrost type.
EL = electric defrost;
in = cycle inversion defrost (hot gas).
dit: defrost interval type.
Defrost interval in hours or minutes.
dct: defrost counting type.
Counting mode for the defrost interval.
dF = digifrost Feature (DIGIFROST®
method; only the operation time of the
compressor is counted).
rt = real time (the count is based on the op-
erating time of the instrument).
SC = Stop Compressor (the defrost takes
place whenever the compressor stops).
Fr = Free (the compressor relay has no re-
lation with the defrost functions and con-
tinues to regulate on Setpoint).
doh: defrost offeset hour.
Defrost start delay time; in minutes.
dEt: defrost Endurance time.
Defrost time-out; in minutes or seconds.
dSt: defrost Stop temperature.
Fdt: Fan delay time.
Delay for fan start after defrost; in minutes.
dt: drainage time.
Dripping time in minutes.
dPo: defrost (at) Power-on.
y = yes; n = no
ddL: defrost display Lock.
n = no; during defrost the display will show
the temperature measured by the room
probe.
y = yes; during defrost the display will
show the last value measured by the room
probe before defrost.
Lb = Label (“defrost”); during defrost the
display will show the “dEF” (dEFrost) label
to indicate defrost is in progress.
Lg = Label (“degivrage”); during defrost the
display will show the “dEg” (“dEgivrage”)
label to indicate defrost is in progress.
NOTE: in case “n” or “lb” is selected the
display will be locked until the Setpoint on
the room probe is reached.
dFd: defrost Fan disable.
Allows the selection of fan evaporator ex-
clusion during defrost.
y = yes; n = no.
Att: Alarm temperature type.
Decoding mode for parameters “HAL” and
“LAL”.
Ab = Absolute; re = relative.
HAL: High Alarm.
Maximum temperature alarm.
LAL: Low ALarm.
Minimum temperature alarm.
AFd: Alarm (Fan) differential.
Operating differential for temperature
alarms.
PAO: Power-on Alarm Override.
Alarm exclusion after instrument start-up;
in hours.
dAo: defrost Alarm override.
Alarm exclusion after defrost; in minutes.
tAo: temperature Alarm override.
Delay for temperature alarm signalling; in
minutes.
Fco: Fan compressor off.
Allows to disable or enable the fan lock
when the compressor is OFF.
cPP: compressor Probe Protection.
Allows the selection of the output state in
case of faulty probe.
oF = relay OFF in case of faulty probe.
on = relay ON in case of faulty probe.
dc = duty cycle; the ON and OFF times for
the relay are defined by parameters “Ont”
and “OFt”.
Ont: On time (compressor).
ON time for the compressor (when CPP =
dc); in minutes.
OFt: OFF time (compressor).
OFF time for the compressor (when CPP =
dc); in minutes.
ctP: compressor type Protection.
Allows the selection of the protection type
to prevent close startups of the output
(time is set through the following parame-
ter).
nP = no Protection.
don = delay on start. Delay on relay activa-
tion.
doF = delay at switching oFf. Minimum
time for relay cut off.
dbl = delay between two successive
starts.
cdP: compressor delay Protection.
Time referred to the previous parameter; in
minutes.
odo: output delay (at) on.
Delay for the activation of outputs at start-
up; in minutes.
PrP: Presence Probe.
Allows to select the presence of the
Evaporator probe.
nP = Evaporator probe not present;
EP = Evaporator probe present;
AP = not usable;
EAP = not usable.
CAL: CALibration.
Allows the calibration of the value mea-
sured by the control probe in case it is dif-
ferent from a sample value.
Default set to “0”.
FPS: Fan Probe Setpoint
Allows the selection of the holding temper-
ature (Setpoint) of the speed regulator.
Fpd: Fan probe differential.
Allows the selection of the operating band
width for the speed regulator. Shall be set
to negative values to operate in “evapora-
tion” mode.
FLS: Fan Low Speed.
Allows to select the minimum speed for the
evaporator fans.
0…9 = minimum speed allowed values (0
