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1592009037 XW270-271L GB r1.0 15.12.2004.doc
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“P3” Auxiliary probe failure Alarm output ON; Other outputs unchanged
“HA” Maximum temperature alarm Alarm output ON; Other outputs unchanged
“LA” Minimum temperature alarm Alarm output ON; Other outputs unchanged
“EE” Data or memory failure Alarm output ON; Other outputs unchanged
“dA” Defrost timeout alarm Alarm output ON; Other outputs unchanged
“dAL” Door switch alarm Alarm output ON; Other outputs unchanged
“EAL” External alarm Alarm output ON; Other outputs unchanged
“BAL” Serious external alarm Alarm output ON; Other outputs OFF
“PAL” Pressure switch alarm Alarm output ON; Other outputs OFF
The alarm message is displayed until the alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which is flashing.
To reset the “EE” alarm and restart the normal functioning press any key, the “rSt” message is displayed for about
3s.
SILENCING BUZZER / ALARM RELAY OUTPUT
If “tbA = y”, once the alarm signal is detected the buzzer and the relay are is silenced by pressing any key.
If “tbA = n”, only the buzzer is silenced while the alarm relay is on until the alarm condition recovers.
“EE” ALARM
The
instruments are provided with an internal check for the data integrity. Alarm “EE” flashes when a
failure in the memory data occurs. In such cases the alarm output is enabled.
ALARM RECOVERY
Probe alarms : “P1” (probe1 faulty), “P2” and “P3”; they automatically stop 10s after the probe restarts normal
operation. Check connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat temperature returns to normal
values or when the defrost starts.
Door switch alarm “dA” stop as soon as the door is closed.
External alarms “EAL”, “BAL” stop as soon as the external digital input is disabled “PAL” alarm is recovered by
switching OFF the instrument.
TECHNICAL DATA
Housing: self extinguishing ABS.
Case: facia 38x185 mm; depth 76mm
Mounting : panel mounting in a 150x31 mm panel cut-out with two screws.
∅ 3 x 2mm.
Distance between the holes 165mm
Protection: IP20.
Frontal protection: IP65 with frontal gasket mod RG-L. (optional)
Connections: Screw terminal block
≤ 2,5 mm
2
heat-resistant wiring and 6,3mm Faston
Power supply: 230Vac or. 110Vac
± 10%
Power absorption: 7VA max.
Display: 3 digits, red LED, 14,2 mm high.
Inputs: 3 NTC probes
Digital inputs: 2 free voltage
Relay outputs: Total current on loads MAX. 20A
compressor: relay SPST 20(8) A, 250Vac
light: relay SPST 16(3) A, 250Vac
fans: relay SPST 8(3) A, 250Vac
defrost: relay SPST 8(3) A, 250Vac
alarm: SPST relay 8(3) A, 250Vac
auxiliary: SPST relay 16(3) A, 250Vac
Other output : alarm buzzer
Serial output : TTL standard
Communication protocol: Modbus - RTU
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: -25÷60 °C.
Relative humidity: 20
÷85% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-58÷230°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable).
Accuracy (ambient temp. 25°C): ±0,5 °C ±1 digit
CONNECTIONS
XW270L/XW271L
(*) In XW271L, AUX is an anticondensing heater
Common
Door switch
Digital inp.
Def.
Display
Room
;:/;:/
ALARM
AUX
(*)
Def. Comp
Fan Light
Line
Neutral
20A
250Vac
MAX
20A
8A
250Vac
16A
250Vac
8A
250Vac
8A
250Vac
16A
250Vac
DEFAULT SETTING VALUES
Set Set point LS÷US -5 Pr1 Pr1
Hy Differential 0,1÷25,5 °C / 1÷45°F 2 Pr1 Pr1
LS Minimum set point -50,0°C÷SET / -58°F÷SET -30 Pr2 Pr2
US Maximum set point SET ÷ 110°C / SET ÷ 230°F 20 Pr2 Pr2
OdS Outputs activation delay at start up 0÷255 min. 1 Pr2 Pr2
AC Anti-short cycle delay 0÷30 min. 1 Pr1 Pr1
CCt Compressor ON time during fast freezing 0 ÷ 23h 50 min. 0 Pr2 Pr2
COn Compressor ON time with faulty probe 0÷255 min. 15 Pr2 Pr2
COF Compressor OFF time with faulty probe 0÷255 min. 30 Pr2 Pr2
DISPLAY
CF Temperature measurement unit °C ÷ °F °C Pr2 Pr2
rES Resolution (integer/decimal point) in ÷ de de Pr1 Pr1
Lod Local display P1 ÷ 1r2 P1 Pr2 Pr2
Red Remote display P1 ÷ 1r2 P1 Pr2 Pr2
DEFROST
tdF Defrost type rE, rT, in rE Pr1 Pr1
EdF Defrost mode In, Sd In Pr2 Pr2
SdF Set point for SMART DEFROST -30 ÷ +30°C / -22÷+86°F 0 Pr2 Pr2
dtE
Defrost termination temperature
(1°Evaporator)
-50,0÷110°C/ -58÷230°F 8 Pr1 Pr1
IdF Interval between defrost cycles 1÷120h 6 Pr1 Pr1
MdF (Maximum) length for 1° defrost 0÷255 min. 30 Pr1 Pr1
dFd Displaying during defrost rt, it, SEt, dEF, dEG it Pr2 Pr2
dAd MAX display delay after defrost 0÷255 min. 30 Pr2 Pr2
Fdt Draining time 0÷60 min. 0 Pr2 Pr2
dPO First defrost after start up n ÷ y n Pr2 Pr2
dAF Defrost delay after fast freezing 0 ÷ 23h 50 min. 2 Pr2 Pr2
FANS
FnC Fans operating mode C-n, C-y, O-n, O-y O-n Pr2 Pr2
Fnd Fans delay after defrost 0÷255 min. 10 Pr2 Pr2
FSt Fans stop temperature -50,0÷110°C/ -58÷230°F 2 Pr2 Pr2
ALARMS
ALC Temperature alarms configuration rE÷Ab rE Pr2 Pr2
ALU MAXIMUM temperature alarm -50,0÷110°C/ -58÷230°F 10 Pr1 Pr1
ALL minimum temperature alarm -50,0÷110°C/ -58÷230°F 10 Pr1 Pr1
AFH Temperature alarm and fan differential 0,1÷25,5 °C / 1÷45°F 2
ALd Temperature alarm delay 0÷255 min. 15 Pr2 Pr2
dAO Delay of temperature alarm at start up 0 ÷ 23h 50 min. 1,3 Pr2 Pr2
EdA Alarm delay at the end of defrost 0÷255 min. 30 Pr2 Pr2
dot
Delay of temperature alarm after closing
the door
0÷255 min. 15 Pr2 Pr2
dOA Open door alarm delay 0÷255 min. 15 Pr2 Pr2
tBA Alarm relay silencing y ÷ n y Pr2 Pr2
nPS Pressure switch activation number 0÷15 0 Pr2 Pr2
ANALOGUE INPUTS
Ot Thermostat probe calibration -12,0÷12,0°C / -21÷21°F 0 Pr1 Pr1
OE Evaporator probe calibration -12,0÷12,0°C / -21÷21°F 0 Pr2 Pr2
O3 Auxiliary probe calibration -12,0÷12,0°C / -21÷21°F 0 Pr2 Pr2
P2P Evaporator probe presence n ÷ y y Pr2 Pr2
P3P Auxiliary probe presence n ÷ y n Pr2 Pr2
HES
Temperature increase during the Energy
Saving cycle
-30÷30°C / -22÷86°F 0 Pr2 Pr2
DIGITAL INPUTS
Odc Open door control no, Fan, CPr, F_C Fan Pr2 Pr2
I1P Door switch polarity CL÷OP CL Pr2 Pr2
I2P Configurable digital input polarity CL÷OP CL Pr2 Pr2
i2F Digital input configuration EAL, bAL, PAL, dFr,
AUS, ES, OnF
EAL Pr2 Pr2
dId Digital input alarm delay 0÷255 min. 5 Pr2 Pr2
SAA Set point for anti-condensing heater -50,0÷110°C/ -58÷230°F -20.0 - - - Pr2
OTHER
Adr Serial address 0÷247 1 Pr1 Pr1
rEL Software release - - - 1.0 Pr2 Pr2
Ptb Map code - - - - - - Pr2 Pr2
Prd Probes display Pb1÷Pb3 - - - Pr2 Pr2
Pr2 Access parameter list - - - - - - Pr2 Pr2
Dixell S.p.A. Via dell’Industria, 27 - 32010 Z.I Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13 -
(PDLOGL[HOO#GL[HOOFRP KWWSZZZGL[HOOFRP
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