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14.2 PROGRAM AN INSTRUMENT BY USING A HOT KEY (DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a pre-programmed "HOT-KEY" into the 5-PIN receptacle and then turn the Controller
ON.
3.
The parameter list of the "HOT-KEY" will be automatically downloaded into the Controller
memory. The "doL" message will blink followed a by a flashing "End" label.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the "HOT-KEY".
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.
15. ALARM SIGNALS
Message Cause
P1
Room probe failure
P2
Evaporator probe failure
P3
Third probe failure
P4
Fourth probe failure
HA
Maximum temperature alarm
LA
Minimum temperature alarm
HA2
Condenser high temperature
LA2
Condenser low temperature
dA
Door open
EA
External alarm
CA
Serious external alarm (i1F=bAL) All outputs OFF.
CA
Pressure switch alarm (i1F=PAL) All outputs OFF
rtC
Real time clock alarm
rtF
Real time clock board failure
15.1 SILENCING BUZZER / ALARM RELAY OUTPUT
-
tbA=Y: the buzzer and the relay are is silenced by pressing any key.
-
tbA=n: only the buzzer is silenced while the alarm relay is on until the alarm condition
recovers.
15.2 ALARM RECOVERY
Probe alarms P1, P2, P3 and P4 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, LA, HA2 and"LA2 automatically stop as soon as the temperature returns to
normal values.
Alarms EA and CA (with i1F=bAL) recover as soon as the digital input is disabled.
Alarm CA (with i1F=PAL) recovers only by switching off and on the instrument.
15.3 OTHER MESSAGES
on
Keyboard enabled after automatic lock.
LOC Keyboard automatically locked
Pon
Keyboard unlocked.
PoF
Keyboard locked
In programming mode: none parameter is present in Pr1
noP
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
16. TECHNICAL DATA
Housing: self extinguishing ABS
Case: facia 38x185 mm; depth 76mm
Mounting: panel mounting in a 150x31 mm panel cut-out with the 2 metal brackets supplied
Protection: IP20
Frontal protection: IP65
Connections: screw terminal block
2.5 mm
≤
Power supply: 230Vac or. 110Vac or 24Vac
Power absorption: 5VA max
Display: 3 digits, white LED, 14.2 mm high
Inputs: Up to 4 NTC or PTC probes
Digital inputs: 2 free voltage
Relay outputs: Total current on loads MAX. 20A
Compressor: relay SPST 20(8) A, 250Vac
Light: relay SPST 8 or 16(3) A, 250Vac
Other output: buzzer
Serial output: TTL standard
Communication protocol: Modbus - RTU
Data storing: on the non-volatile memory (EEPROM)
Internal clock back-up: 24 hours (only for model with RTC)
Kind of action: 1B
Pollution degree: 2
Software class: A
Rated impulsive voltage: 2500V
Over voltage Category: II
Operating temperature: 0 to 60 °C (32 to 140°F)
Storage temperature: -30 to 85°C (-22 to 185°F).
Relative humidity: 20 to 85% (not condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-40 to 230°F)
PTC probe: -50 to 150°C (-58 to 302°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.7°C ±1 digit
1592027615 XW20LT RTC GB r1.0 18.09.2012
Outputs
Compressor output acc. to par. Con and CoF
Defrost end is timed
Outputs unchanged
Outputs unchanged
Outputs unchanged.
Outputs unchanged.
It depends on the AC2 parameter
It depends on the bLL parameter
Compressor and fans restarts
Output unchanged.
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF Set real time clock
has to be set.
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF. Contact the service.
2
heat-resistant wiring and 6.3mm Faston
10%
±
17. CONNECTIONS
Supply: 120Vac or 24Vac: connect to terminals 11-12
The X-REP output is optional
The light relay can be also 16(5)A according to the model
18. DEFAULT SETTING VALUES
Label Name
Set Set point
rtC* Real time clock menu
Hy Differential
LS Minimum set point
US Maximum set point
ot Thermostat probe calibration
P2P Evaporator probe presence
oE Evaporator probe calibration
P3P Third probe presence
o3 Third probe calibration
P4P Fourth probe presence
o4 Fourth probe calibration
odS Outputs delay at start up
AC Anti-short cycle delay
Ac1 Second compressor start delay
rtr P1-P2 percentage for regulation
CCt Continuous cycle duration
CCS Set point for continuous cycle
Con Compressor ON time with faulty probe
CoF Compressor OFF time with faulty probe
CH Type of regulation
CF Temperature measurement unit
rES Resolution
Lod Probe displayed
2
rEd
X-REP display
dLy Display temperature delay
dtr P1-P2 percentage for display
dFP Probe selection for defrost termination
dtE Defrost termination temperature
idF Interval between defrost cycles
MdF (Maximum) length for defrost
dFd Displaying during defrost
dAd MAX display delay after defrost
ACH Kind of action for auxiliary relay
SAA Set Point for auxiliary relay
SHy Differential for auxiliary relay
ArP Probe selection for auxiliary relay
Sdd Auxiliary relay operating during defrost
ALP Alarm probe selection
ALC Temperat. alarms configuration
ALU MAXIMUM temperature alarm
ALL Minimum temperature alarm
AFH Differential for temperat. alarm recovery
ALd Temperature alarm delay
dAo Delay of temperature alarm at start up
AP2 Probe for temperat. alarm of condenser
AL2 Condenser for low temperat. alarm
AU2 Condenser for high temperat. alarm
AH2 Differ. for condenser temp. alar. recovery
Ad2 Condenser temperature alarm delay
dA2 Delay of cond. temper. alarm at start up
Compr. off for condenser low temperature
bLL
alarm
Compr. off for condenser high
AC2
temperature alarm
tbA Alarm relay disabling
XW20LT
Range
°C/°F
LS to US
-5.0
-
-
[0.1 to 25.5°C]
2.0
[1 to 45°F]
[-55°C to SET]
-50.0
[-67°F to SET]
[SET to 150°C]
110
[SET to 302°F]
[-12 to 12°C]
0.0
[-21 to 21°F]
n=not present; Y=present
Y
[-12 to 12°C]
0.0
[-21 to 21°F]
n=not present; Y=present
n
[-12 to 12°C]
0
[-21 to 21°F]
n=not present; Y=present
n
[-12 to 12°C]
0
[-21 to 21°F]
0 to 255 min
0
0 to 50 min
1
0 to 255 sec
5
0 to 100 (100=P1 , 0=P2)
100
0.0 to 24h00min
0.0
[-55.0 to 150.0°C]
-5
[-67 to 302°F]
0 to 255 min
15
0 to 255 min
30
CL; Ht
CL
°C to °F
°C
in=integer; dE= dec.point
dE
P1; P2
P1
P1; P2; P3; P4; SEt; dtr
P1
0.0 to 20min00sec (10 sec)
0.0
1 to 99
50
nP; P1; P2; P3; P4
P2
-50 to 50°C
8
1 to 120 hours
6
0 to 255 min
30
rt; it; SEt; DEF
it
0 to 255 min
30
CL; Ht
cL
[-55.0 to 150°C]
0,0
[-67 to 302°F]
[0.1 to 25.5°C]
2,0
[1 to 45°F]
nP; P1; P2; P3; P4
nP
n(0); Y(1)
n
nP; P1; P2; P3; P4
P1
rE= related to set;
Ab
Ab = absolute
[SET to 150.0°C]
110,0
[SET to 302°F]
[-55.0°C to SET]
-50,0
[-67°F to SET]
[0.1 to 25.5°C]
2,0
[1 to 45°F]
0 to 255 min
15
0.0 to 23h50min
1,3
nP; P1; P2; P3; P4
P4
[-55 to 150°C]
-40
[-67 to 302°F]
[-55 to 150°C]
110
[-67 to 302°F]
[0.1°C to 25.5°C]
5
[1°F to 45°F]
0 to 254 min; 255=nU
15
0.0 to 23h50min
1,3
n(0); Y(1)
n
n(0); Y(1)
n
n(0); Y(1)
y
5/6
Level
- - -
Pr1
Pr1
Pr2
Pr2
Pr1
Pr1
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr1
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr1
Pr2
Pr1
Pr2
Pr2
Pr2
Pr2
Pr2
Pr1
Pr1
Pr1
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr1
Pr1
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
Pr2
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