Specifications

XR03CX-HF.doc XR03CX& 2/2
dP Defrost start after Power failure: (n - y) n= the defrost clock will reset; y= start defrost after a power
failure
Fd Defrost indicator delay: (0 – 99 min) the time delay that the defrost indicator light will stay on after a
defrost
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 XR03CX 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 Fast-on connections. 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 angled upward 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 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.
“nP’
No Parameters in L1
Outputs unchanged
“dA”
Door Open
Compressor and fans restart
11.1 ALARM RECOVERY
Probe alarms P1” and “P2” start a few seconds after the fault in the related probe; they automatically stop a
few seconds after the probe restarts normal operation. Check connections before replacing the probe,
Temperature alarms “HA” and “LA” automatically stop as soon when 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’s
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 Probes
Relay outputs: compressor; 16FLA/96LRA, AUX: 10A
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
Ambient 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
1 ÷ 45°F
2 °F
L1
LS
Minimum Set Point
-67°F÷SET
25°F
L2
US
Maximum Set Point
SET÷99°F
40°F
L2
ot
First probe calibration
-18 +18°F
0°F
L2
P2
Second probe presence
n – Y
y
L2
oE
Second probe calibration
18 +18°F
0°F
L2
AC
Anti-short cycle delay
0 ÷ 50 min
2
L2
Cy
Compressor ON time faulty probe
0 ÷ 99 min
12
L2
Cn
Compressor OFF time faulty probe
0 ÷ 99 min
4
L2
DISPLAY
CF
Measurement units
°C - °F
°F
L2
rE
Resolution (only for °C)
dE – in
in
L2
Ld
Default Display
P1 - P2
P1
L2
dy
Display delay
0 ÷ 15 min
0
L2
DEFROST
dE
Defrost termination temperature
58÷99°F
52 °F
L1
id
Interval between defrost cycles
0 ÷ 99 hours
4
L1
nd
Maximum length for defrost
0 ÷ 99 min.
28
L1
dF
Display during defrost
rt – it – dF - St
rt
L2
dP
Defrost After Power Failure
n- y
y
L2
Fd
Defrost Indicator delay after defrost
0 – 99min
20
L2
ALARMS
AU
Maximum temperature alarm
ALL÷99°F
55 °F
L2
AL
Minimum temperature alarm
-55°C÷ALU/-
67°F÷ALU
20 °F
L2
Ad
Temperature alarm delay
0 ÷ 99 min
5
L2
dA
temperature alarm delay at startup
0 ÷ 99 min
90
L2
OTHER
d2
Evaporator probe display
Read Only
- - -
L1
Pt
Parameter code table
Read Only
- - -
L2
rL
Firmware release
Read Only
- - -
L2