Operating instructions

User Instructions Low Temperature Freezers Model UNI/LT
11
NOTE: the message “Err” is displayed for
failed programming. In this case turn the
unit off and then on if you want to restart the
download again or remove the “Hot key” to
abort the operation.
ALARM SIGNALS
ALARM RECOVERY
Probe alarm “P1” starts some seconds after
the fault in the related probe; it automati-
cally stops some seconds after the probe
restarts normal operation. Check connec-
tions before replacing the probe.
Temperature alarms “HA” and “LA” auto-
matically stop as soon as the thermostat
temperature returns to normal values and
when defrost starts.
Alarms “EA” and “CA” (with i1F=bAL) re-
cover as soon as the digital input is
disabled.
Alarm “CA” (with i1F=PAL) recovers only by
switching off and on the instrument.
TECHNICAL DATA
Housing: self extinguishing ABS.
Case: XR30C frontal 32x74 mm; depth 60mm;
Mounting: XR30C panel mounting in a
71x29mm panel cut-out
Protection: IP20.
Frontal protection: IP65 with frontal gasket
RG-C (optional).
Connections: Screw terminal block ≤ 2,5
mm2 wiring.
Power supply: according to the model:
12Vac/dc, ±10%; 24Vac/dc, ±10%;
230Vac ±10%, 50/60Hz, 110Vac ±10%,
50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14,2 mm high.
Inputs: 1 NTC or PTC probe.
Digital input: free contact
Relay outputs:
compressor: SPST relay 8(3) A, 250Vac or
SPST relay 20(8)A; 250Vac
second relay: SPDT relay 8(3) A, 250Vac or
Data storing: on the non-volatile memory
(EEPROM).
Kind of action: 1B; Pollution grade: normal;
Software class: A.
Operating temperature: 0÷60 °C.
Storage temperature: -30÷85 °C.
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range:
NTC probe: -40÷110°C (-40÷230°F)
PTC probe: -50÷150°C (-58÷302°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable).
Accuracy (ambient temp. 25°C): ±0,7 °C ±1
digit
CONNECTIONS
XR30C: 8A compressor
Alarm signals;
Message
EE
P1
HA
LA
Cause
Date or memory failure
Probe failure
Max. temp. alarm
Min. temp. alarm