Porkka F Technical And Service Manual page 6

Technical and Service manual
Inventus upright refrigerators and freezers
User manual - Control unit XW70K AND D50K
6.9 ON/OFF FUNCTION (STAND BY)
By pushing the ON/OFF key, the instrument shows "OFF" for 5 sec. and the ON/OFF LED
is switched ON.
During the OFF status, all the relays are switched OFF and the regulations are stopped; if
a monitoring system is connected, it does not record the instrument data and alarms.
When the instrument is in stand by the keyboard displays "oFF".
N.B. During the OFF status the Light and AUX buttons are active.
6.10 TO SEE THE PROBE VALUES
1.
Enter in "Pr1" level.
2. Parameters "dP1", "dP2", "dP3" and "dP4" display the value of probes 1, 2, 3 and 4.
7 PARAMETER LIST
REGULATION
HY Differential: (0.1 to 25.5°C; 1 to 45°F) intervention differential for set point. Compressor
Cut IN is Set Point + differential (HY). Compressor Cut OUT is when the temperature
reaches the set point.
LS Minimum set point: (-55°C to SET; -67°F to SET) sets the minimum value for the set
point.
US Maximum set point: (SET to 150°C; SET to 302°F) set the maximum value for set point.
ot Thermostat probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the thermostat probe. Terminals 1-2.
P2P Second probe presence: (n; Y) n = not present, the defrost stops by time;
Y = present, the defrost stops by temperature. Terminals 2-3
oE Second probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset
of the second probe. Terminals 2-3.
P3P Third probe presence (P3): (n; Y) n = not present, Y = present. Terminals 4-5
o3 Third probe calibration (P3): (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the third probe. Terminals 4-5
P4P Fourth probe presence: (n; Y) n = Not present; Y = present. Terminals 5-6
o4 Fourth probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset
of the fourth probe. Terminals 5-6
odS Outputs activation delay at start up: (0 to 255min) this function is enabled at the initial
start up of the instrument and inhibits any output activation for the period of time set in the
parameter.
AC Anti-short cycle delay: (0 to 50min) minimum interval between the compressor stop and
the following restart.
AC1 2 nd compressor delay at start up (0÷255s) Used only with oA3 or oA4 = cP2 Time
interval between the switching on of the first compressor and the second one.
rtr Percentage of the second and first probe for regulation: (0 to 100; 100=P1, 0=P2) it
allows to set the regulation according to the percentage of the first and second probe, as
for the following formula (rtr(P1-P2)/100 + P2).
CCt Compressor ON time during continuous cycle: (0.0 to 24h00min, res. 10min) allows to
set the length of the continuous cycle. Compressor stays on without interruption during
CCt time. This is useful, for instance, when the room is filled with new products.
CCS Set point for continuous cycle: (-55 to 150°C; -67 to 302°F) it sets the set point used
during the continuous cycle.
Con Compressor ON time with faulty probe: (0 to 255min) time during which the
compressor is active in case of faulty thermostat probe. With Con=0 compressor is
always OFF.
CoF Compressor OFF time with faulty probe: (0 to 255min) time during which the
compressor is OFF in case of faulty thermostat probe. With CoF=0 compressor is always
active.
DISPLAY
CF Temperature measurement unit: (°C; °F) °C = Celsius; °F = Fahrenheit.
WARNING: When the measurement unit is changed the SET point and the values of
the parameters related to the temperature have to be checked and modified (if
necessary).
rES Resolution (for °C): (in=1°C; dE=0.1°C) allows decimal point display.
rEd Probe display (P1; P2, P3, P4, SET, dtr) it selects which probe is displayed by the
controller. P1 = Thermostat probe; P2 = Second probe; P3 = Third probe; P4 = Fourth
probe, SET = set point;
dtr = percentage of visualization.
dLY Display delay: (0 to 20min00s; res. 10s) when the temperature increases, the display
is updated of 1°C or 1°F after this time.
dtr Percentage of the second and first probe for visualization when Lod=dtr: (0 to 99;
100=P1, 0=P2) if Lod=dtr it allows to set the visualization according to the percentage
of the first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
DEFROST
tdF Defrost type: (EL; in) EL = electrical heater; in = hot gas.
dFP Probe selection for defrost termination: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 = Fourth Probe
dtE Defrost termination temperature: (-55 to 50°C; -67 to 122°F) (enabled only when
EdF=Pb) sets the temperature measured by the evaporator probe, which causes the
end of defrost.
idF Interval between defrost cycles: (0 to 120hours) determines the interval of time
between two defrost cycles.
MdF (Maximum) length for defrost: (0 to 255min) when P2P = nP, (not evaporator probe:
timed defrost) it sets the defrost duration. When P2P different from nP (defrost end
based on temperature) it sets the maximum length for defrost.
dSd Start defrost delay: (0 to 99min) this is useful when different defrost start times are
necessary to avoid overloading the plant.
dFd Temperature displayed during defrost: (rt; it; SEt; dEF) rt = real temperature;
it = temperature at defrost start; SEt = set point; dEF = "dEF" label.
dAd MAX display delay after defrost: (0 to 255min) sets the maximum time between the
end of defrost and the restarting of the real room temperature display.
Fdt Drip time: (0 to 120min) time interval between reaching defrost termination temperature
and the restoring of the control's normal operation. This time allows the evaporator to
eliminate water drops that might have formed due to defrost.
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.
dPo First defrost after start-up: (n; Y) n = after the idF time, Y = immediately.
dAF Defrost delay after continuous cycle: (0.0 to 24h00min, res. 10min) time interval
between the end of the fast freezing cycle and the following defrost related to it.
FANS
FnC Fans operating mode: (C-n; o-n; C-Y; o-Y) C-n = runs with the compressor, OFF during
defrost; o-n = continuous mode, OFF during defrost; C-Y = runs with the compressor, ON
during defrost; o-Y = continuous mode, ON during defrost.
Fnd Fans delay after defrost: (0 to 255min) interval between end of defrost and evaporator
fans start.
FCt Temperature differential to avoid fan short cycles: (0 to 59°C; 0 to 90°F) (N.B.: FCt=0
means function disabled) if the difference of temperature between the evaporator and the
room probes is higher than FCt value, the fans will be switched on.
FSt Fans stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature, detected by
evaporator probe, above which fans are always OFF.
Fon Fan ON time: (0 to 15min) with Fnc=C_n or C_Y, (fan activated in parallel with
compressor) it sets the evaporator fan ON cycling time when the compressor is off. With
Fon=0 and FoF≠0 the fan are always off, with Fon=0 and FoF=0 the fan are always off.
FoF Fan OFF time: (0 to 15min)
With FnC=C_n or C_Y, (fan activated in parallel with compressor) it sets the evaporator
fan off cycling time when the compressor is off.
With Fon=0 and FoF≠0 the fan are always off, with Fon=0 and FoF=0 the fan are always
off.
FAP Probe selection for fan management: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 =Fourth probe.
OA4 = AUS: AUXILIARY THERMOSTAT CONFIGURATION (terms. 28-29)
ACH Kind of regulation for auxiliary output: (Ht; CL) Ht = heating; CL = cooling.
SAA Set Point for auxiliary output: (-55.0 to 150.0°C; -67 to 302°F) it defines the room
temperature set point to switch auxiliary output.
SHY Differential for auxiliary output: (0.1 to 25.5°C; 1 to 45°F) intervention differential for
auxiliary output set point.

ACH=CL, AUX Cut in is [SAA+SHY]; AUX Cut out is SAA.

ACH=Ht, AUX Cut in is [SAA–SHY]; AUX Cut out is SAA.
ArP Probe selection for auxiliary: (nP; P1; P2; P3; P4) nP = no probe, the auxiliary output is
switched only by the digital input; P1 = Probe 1 (Thermostat probe); P2 = Probe 2; P3 =
Probe 3; P4 = Probe 4.
Sdd Auxiliary output off during defrost: (n; Y) n = the auxiliary output operates during
defrost. Y = the auxiliary output is switched off during defrost.
ALARMS
ALP Probe selection for alarm: (nP; P1; P2; P3; P4) nP = no probe, the temperature alarms
are disabled; P1 = Probe 1 (Thermostat probe); P2 = Probe 2; P3 = Probe 3; P4 = Fourth
probe.
ALC Temperature alarms configuration: (Ab; rE) Ab = absolute temperature, alarm
temperature is given by the ALL or ALU values. rE = temperature alarms are referred to
the set point. Temperature alarm is enabled when the temperature exceeds the
[SET+ALU] or [SET-ALL] values.
ALU MAXIMUM temperature alarm:
 If ALC=Ab: [ALL to 150.0°C or ALL to 302°F]

If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
ALL Minimum temperature alarm:
 If ALC=Ab: [-55°C to ALU; -67 to ALU]

If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached the alarm is enabled, after the ALd delay time.
AFH Differential for temperature alarm recovery: (0.1 to 25.5°C; 1 to 45°F) intervention
differential for recovery of temperature alarm.
ALd Temperature alarm delay: (0 to 255 min) time interval between the detection of an alarm
condition and alarm signalling.
dot Temperature alarm delay, with door open: (0 to 255 min) time interval between the
detection of temperature alarm condition and alarm signaling with door open.
dAo Exclusion of temperature alarm at start-up: (0.0 to 24h00min, res. 10min) time interval
between the detection of the temperature alarm condition after instrument power on and
alarm signalling.
CONDENSER TEMPERATURE ALARM
AP2 Probe selection for temperature alarm of condenser: (nP; P1; P2; P3; P4)
nP = no probe; P1 = thermostat probe; P2 = second probe; P3 = Third probe; P4 = Fourth
probe.
AL2 Low temperature alarm of condenser: (-55 to 150°C; -67 to 302°F) when this
temperature is reached the LA2 alarm is signalled, possibly after the Ad2 delay.
Au2 High temperature alarm of condenser: (-55 to 150°C; -67 to 302°F) when this
temperature is reached the HA2 alarm is signalled, possibly after the Ad2 delay.
AH2 Differential for temperature condenser alarm recovery: 0.1 to 25.5°C; 1 to 45°F.
Ad2 Condenser temperature alarm delay: (0 to 255 min) time interval between the detection
of the condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarm exclusion at start up: 0.0 to 24h00min, res. 10min.
bLL Compressor off with low temperature alarm of condenser: (n; Y) n = compressor
keeps on working; Y = compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser: (n; Y) n = compressor
keeps on working; Y = compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
RELAY OA3 (22-23) CONFIGURATION
tbA Alarm relay silencing (with oAx =ALr): (n; Y) n = silencing disabled: alarm relay stays
on till alarm condition lasts. Y = silencing enabled: alarm relay is switched OFF by
pressing a key during an alarm.
oA4 TRIAN output configuration, terminals 28-29: (dEF; FAn; ALr; LiG; AUS; onF; db;
dEF2; HES) dEF = defrost; FAn = Fan; ALr = alarm; LiG = light; AUS = Auxiliary relay;
onF = always on with instrument on; db = neutral zone; dEF2 = do not select it; HES =
night blind.
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