dIXEL
Operating Manual
1598024510
XR02CX US.doc XR02CX 2/2
id Interval between defrost cycles: (0÷99 ore) Determines the time interval between the
beginning of two defrost cycles.
Md Maximum length for defrost: (0÷99 min. with 0 no defrost) when ot=n, (not evaporator probe:
timed defrost) it sets the defrost duration, when ot = y (defrost end based on temperature) it sets
the maximum length for defrost.
dF Display during defrost: (rt / it / St / dF) rt= real temperature; it= start defrost temperature; St=
SET-POINT; dF= label dF.
ALARMS
AU Maximum temperature alarm: (AL÷99°C) when this temperature is reached the alarm is
enabled, after the “Ad” delay time.
AL Minimum temperature alarm: (-55÷AU°C) when this temperature is reached the alarm is
enabled, after the “Ad” delay time.
Ad Temperature alarm delay: (0÷99 min) time interval between the detection of an alarm condition
and alarm signalling.
dA Exclusion of temperature alarm at startup: (0÷99 min) time interval between the detection of
the temperature alarm condition after instrument power on and alarm signalling.
OTHER
d2 Evaporator probe display (read only)
Pt Parameter code table
rL Software release
8. INSTALLATION AND MOUNTING
Instrument XR02CX shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 0÷60 °C.
Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to
probes. Let air circulate by the cooling holes.
9. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm
2
. 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.
9.1 PROBES
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.
10. HOW TO USE THE HOT KEY
10.1 HOW TO PROGRAM THE HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push
key; the "uP" message appears
followed a by flashing “En”
3. Push “SET” key and the “En” will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want
to restart the upload again or remove the “Hot key” to abort the operation.
10.2 HOW TO PROGRAM AN INSTRUMENT USING HOT KEY (DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory, the
“do” message is blinking followed a by flashing “En”.
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the “Hot Key”..
NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want
to restart the upload again or remove the “Hot key” to abort the operation.
11. ALARM SIGNALLING
Mess. Cause Outputs
"P1" Room probe failure Compressor output according to “Cy” e “Cn”
"P2" Evaporator probe failure Defrost end is timed
"HA" Maximum temperature alarm Outputs unchanged
"LA" Minimum temperature alarm Outputs unchanged
“EA” External alarm Outputs unchanged
“CA” Serious external alarm All outputs OFF.
“dA” Door Open Compressor and fans restarts
11.1 ALARM RECOVERY
Probe alarms P1” and “P2” start some seconds after the fault in the related probe; they automatically
stop some seconds after the probe restarts normal operation. Check connections before replacing the
probe. Temperature alarms “HA” and “LA” automatically stop as soon as the temperature returns to
normal values.
Alarms “EA” and “CA” (with iF=bL) recover as soon as the digital input is disabled.
12. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: frontal 32x74 mm; depth 60mm;
Mounting: panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: IP65
Connections: disconnectable terminal block ≤ 2,5 mm
2
wiring and 6.3mm fast-on
Power supply: according to the model ±10%; 230Vac ±10%, 50/60Hz, 110Vac ±10%, 50/60Hz
Power absorption: 3.5 VA max
Display: 2 digits, red LED, 14,2 mm high; Inputs: 2 NTC.
Relay outputs: compressor SPST 8(3) A, 250Vac; 20(8)A 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2; Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C; Storage temperature: -30÷85 °C.
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range: NTC -40÷110°C (-40÷230°F);
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit
13. CONNECTIONS
NOTE: Fast-on maximum current 16A
14. DEFAULT SETTING VALUES
LBL
DESCRIPTION RANGE DEFAULT LEVEL
REGULATION
Hy Differential 0.1 ÷ 25°C/1 ÷ 45°F 36 °F L1
LS Minimum Set Point -55°C÷SET/-67°F÷SET -40 °F L2
US Maximum Set Point SET÷99°C/ SET÷210°F 99°F L2
ot First probe calibration -9.9÷9.9°C/-18÷18°F 0.0 L2
P2 Second probe presence n – Y y L2
oE Second probe calibration -9.9÷9.9°C/-18÷18°F 0.0 L2
od Outputs activation delay at start up 0 ÷ 99 min 0 L2
AC Anti-short cycle delay 0 ÷ 50 min 0 L1
Cy Compressor ON time faulty probe 0 ÷ 99 min 15 L2
Cn Compressor OFF time faulty probe 0 ÷ 99 min 30 L2
DISPLAY
CF Measurement units °C - °F °F L2
rE Resolution (only for °C) dE – in in L1
Ld Default Display P1 - P2 - SP P1 L2
dy Display delay 0 ÷ 15 min 0 L2
DEFROST
dE Defrost termination temperature -50÷50°C/-58÷122°F 46 °F L1
id Interval between defrost cycles 0 ÷ 99 hours 6 L1
Md Maximum length for defrost 0 ÷ 99 min. 20 L1
dF Display during defrost rt – in – dE it L2
ALARMS
AU Maximum temperature alarm ALL÷99°C / ALL÷210°F 99 °F L2
AL Minimum temperature alarm -55°C÷ALU/-67°F÷ALU -50 °F L2
Ad Temperature alarm delay 0 ÷ 99 min 15 L2
dA
Exclusion of temperature alarm at
startup
0 ÷ 99 min 99 L2
OTHER
d2 Evaporator probe display Read Only - - - L1
Pt Parameter code table Read Only - - - L2
rL Firmware release Read Only - - - L2
dIXEL S.p.a.
Z.I. Via dell’Industria, 27 - 32010 Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13
htt
://www.dixell.com E-mail: dixell
dixell.com
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