Porkka F Technical And Service Manual page 7

Technical and Service manual
Inventus upright refrigerators and freezers
User manual - Control unit XW70K AND D50K
AoP Alarm relay polarity: (CL; oP) it set if the alarm relay is open or closed when an alarm
occurs. CL = terminals closed during an alarm; oP = terminals open during an alarm.
DIGITAL INPUT
i1P First digital input polarity: (oP; CL) oP = the digital input is activated by opening the
contact; CL = the digital input is activated by closing the contact.
i1F First digital input configuration: (EAL; bAL; PAL; dor; dEF; ES; AUS; Htr; FAn; HdF;
onF; Sbt) EAL = external alarm: "EA" message is displayed; bAL = serious alarm "CA"
message is displayed; PAL = pressure switch alarm, "CA" message is displayed; dor =
door switch function; dEF = activation of a defrost cycle; AUS = auxiliary output activation
with oA4=AUS; Htr = type of inverting action (cooling or heating); FAn = fan; ES = energy
saving; HdF = Holiday defrost (enable only with RTC); onF = to switch the controller off;
LHt = to activate the light.
did Digital input 1 alarm delay: (0 to 255 min) delay between the detection of the external
alarm condition and its signalling.
When i1F= PAL, it is the interval of time to calculate the number of pressure switch
activation.
I2P Second digital input polarity: (oP; CL) oP = the digital input is activated by opening the
contact; CL = the digital input is activated by closing the contact.
I2F Second digital input configuration: (EAL; bAL; PAL; dor; dEF; ES; AUS; Htr; FAn; HdF;
onF; Sbt) EAL = external alarm: "EA" message is displayed; bAL = serious alarm "CA"
message is displayed; PAL = pressure switch alarm, "CA" message is displayed; dor =
door switch function; dEF = activation of a defrost cycle; AUS = auxiliary relay activation
with oA3=AUS; Htr = type of inverting action (cooling or heating); FAn = fan; ES = energy
saving; HdF = Holiday defrost (enable only with RTC); onF = to switch the controller off;
LHt = to activate the light.
d2d Digital input 2 alarm delay: (0 to 255 min) delay between the detection of the external
alarm condition and its signalling.
When i2F= PAL, it is the interval of time to calculate the number of pressure switch
activation.
nPS Number of pressure switch activation: (0 to 15) Number of activation, during the did or
d2d interval, before signalling an alarm event (i1F, i2F=PAL).
If the nPS activation during did or d2d time is reached, switch off and on the instrument to
restart normal regulation.
odC Compressor status when open door: (no; FAn; CPr;F_C;) no = normal;
FAn = normal; CPr = compressor OFF, F_C = compressor OFF.
rrd Outputs restart after door open alarm: (n; Y) n = outputs follow the odC parameter.
Y = outputs restart with a door open alarm.
LES Light off during Energy Saving status: n; Y.
HES Delta temperature during an Energy Saving cycle: (-30.0 to 30.0°C; -54 to 54°F) it
sets the increasing value of the set point [SET+HES] during the Energy Saving cycle.
OTHER
Adr Serial address: (1 to 247) identifies the instrument address when connected to a
ModBUS compatible monitoring system.
PbC Type of probe: (PtC; ntC) it allows to set the kind of probe used by the instrument:
PtC = PTC probe; ntC = NTC probe.
-
onF On/Off key enabling: (nU; oFF; ES) nU = disabled; oFF = enabled; ES = not set it.
dP1 Thermostat probe display.
dP2 Second probe display.
dP3 Third probe display.
dP4 Fourth probe display (only for XW60LT models).
rSE Real set point: it shows the set point used during the energy saving cycle or during the
continuous cycle.
rEL Software release for internal use.
Ptb Parameter table code: readable only.
8 DIGITAL INPUT
The free voltage digital inputs are programmable in different configurations by the i1F or i2F
parameters.
8.1 DOOR SWITCH INPUT ( DOR)
It 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 did, 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 disabled.
8.2 GENERIC ALARM ( EAL)
As soon as the digital input is activated the unit will wait for did time delay before signalling the "EAL"
alarm message. The outputs status doesn't change. The alarm stops just after the digital input is de-
activated.
8.3 SERIOUS ALARM MODE (BAL)
When the digital input is activated, the unit will wait for did delay before signalling the "CA" alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
8.4 PRESSURE SWITCH (PAL)
If during the interval time set by did parameter, the pressure switch has reached the number of
activation of the nPS 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 off and on the instrument to restart normal
regulation.
8.5 AUXILIARY OUTPUT SWITCHING (AUS)
With oA1 or oA2 or oA3=AUS and i1F or i2F=AUX it switches the correspondent relay.
1598027800 XW70K GB PKK R1.0 10.12.2013doc.docx
Porkka reserves the right to make product alterations at any time and can not be held responsible for any printing errors or omissions.
8.6 START DEFROST (I1F = DFR)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation will
restart only if the digital input is disabled otherwise the instrument will wait until the MdF safety time is
expired.
8.7 KIND OF ACTION: HEATING OR COOLING (I1F = HTR)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.8 ENERGY SAVING (I1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+HES
(parameter) sum. This function is enabled until the digital input is activated.
8.9 DIGITAL INPUTS POLARITY
The digital input polarity depends on the i1P or 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
9 INSTALLATION AND MOUNTING
D50K keyboard shall be mounted on vertical panel, and fixed using two columns according to the
following dimensions.
The controller XW70K shall be mounted in a din rail
It must be connected to the keyboard by means of a two-wire cable ( 1mm). The temperature range
allowed for correct operation is 0 to 60°C. Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to probes. Let the air circulate by the
cooling holes.
9.1 XW70K – 8 DIN CASE - DIMENSIONS
10 ELECTRICAL CONNECTIONS
XW70K is provided with screw terminal blocks to connect cables with a cross section up to 2.5 mm
the RS485 (optional) and the keyboard. To connect the other inputs, power supply and relays, XW70K
is provided with Faston connections (6.3mm). Heat-resistant cables have to be used. Before
connecting cables make sure the power supply complies with the instrument's requirements. Separate
the probe cables from the power supply cables, from the outputs and the power connections. Do not
exceed the maximum current allowed on each relay, in case of heavier loads use a suitable external
relay.
NOTE: the maximum current allowed for all the loads is 20A.
10.1 PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
11 TTL/RS485 SERIAL LINE
The TTL connector allows, by means of the external module TTL/RS485 (XJ485CX), to connect the
unit to a network line ModBUS-RTU compatible as the dIXEL monitoring system. The same TTL
connector is used to upload and download the parameter list of the "HOT-KEY".
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