dIXEL
Installing and Operating Instructions
cod.
1592009520
1592009520 XW260K GB a4_rel.1.0 25.10.2000.doc
XW260
4/5
At the end of the data transfer phase the instrument displays the following messages:
“
end
“ for right programming.
“
err
” for failed programming. In this case push “SET” key if you want to restart the programming
again or remove the not programmed “
Hot key
”.
11.
ALARM SIGNALS
Message Cause
Outputs
“P1”
Thermostat probe failure Alarm output ON; Compressor output
according to parameters “COn” and “COF”
“P2”
Evaporator probe failure Alarm output ON; Other outputs unchanged
“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”
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.
11.1
SILENCING BUZZER
Once the alarm signal is detected the buzzer can be silenced by pressing any key. Buzzer is mounted in
the
T620
keyboard and it is an option.
11.2
“EE” ALARM
The
dIXEL
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.
11.3
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.
12.
TECHNICAL DATA
T620 keyboard
Housing:
self extinguishing ABS.
Case:
facia 38x185 mm; depth 23mm
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
Power supply:
from
XW260K
power module
Display
: 3 digits, red LED, 14,2 mm high.
Optional output:
buzzer
Power module XW260K
Case:
“OS”
: open board 132x 94 mm; height: 40mm.
“OA”
: open board with aluminium protection 176x 123mm; height: 52mm.
“GS”
: case 155x114; height 70mm. Self extinguishing ABS. IP55
“PS”
: case 147x110; height 47mm. Self extinguishing ABS. IP55. UL approved
Connections:
Screw terminal block
≤
2,5 mm
2
heat-resistant wiring and 6,3mm Faston
Power supply:
230Vac or. 110Vac
±
10%
Power absorption:
10VA max.
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
Serial output :
TTL standard. RS485 optional
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
13.
CONNECTIONS
13.1
XW260K
Connector
number
Description Connector
number
Description
HOT KEY
Hot key for programming
9 - 10
Door switch
RS485
(Optional)
RS485 direct output
13 - 14
Compressor relay
KEY (+)
+ :connection for keyboard
15
Phase
KEY (-)
- : connection for keyboard
16
Neutral
1 – 2
Display probe
17 - 18
Light relay
3 - 4
Defrost probe
19 - 20
Defrost relay
5 - 6
Room probe
21 - 22
Fan relay
7 - 8
Configurable digital input
14.
DEFAULT SETTING VALUES
Label Name
Range
Default
Level
REGULATION
°C/°F
XW260K
Set Set
point
LS÷US
-5/23
Pr1
Hy
Differential
0,1÷25,5 °C / 1÷45°F
2/4
Pr1
LS
Minimum set point
-50,0°C÷SET / -58°F÷SET
-30/-22
Pr2
US
Maximum set point
SET ÷ 110°C / SET ÷ 230°F
20/68
Pr2
OdS Outputs activation delay at start up
0÷255 min.
1
Pr2
AC
Anti-short cycle delay
0÷30 min.
1
Pr1
CCt Compressor ON time during fast
freezing
0 ÷ 23h 50 min.
0
Pr2
COn Compressor ON time with faulty
probe
0÷255 min.
15
Pr2
COF Compressor OFF time with faulty
probe
0÷255 min.
30
Pr2
DISPLAY
CF
Temperature measurement unit
°C ÷ °F
°C
Pr2
rES
Resolution (integer/decimal point)
in ÷ de
de
Pr1
Lod Visualizzazione su display
P1 ÷ 1r2
P1
Pr2
Red Remote display
P1 ÷ 1r2
P1
Pr2
DEFROST
tdF
Defrost type
rE, rT, in
RE
Pr1
EdF Defrost mode
In, Sd
In
Pr2
SdF Set point for SMART DEFROST
-30 ÷ +30°C / -22÷+86°F
0/32
Pr2
dtE Defrost termination temperature
(1°Evaporator)
-50,0÷110°C / -58÷230°F
8/46
Pr1
IdF
Interval between defrost cycles
1÷120h
6
Pr1
MdF (Maximum) length for 1° defrost
0÷255 min.
30
Pr1
dFd Displaying during defrost
rt, it, SEt, dEF, dEG
It
Pr2
dAd MAX display delay after defrost
0÷255 min.
30
Pr2
Fdt Draining
time
0÷60
min.
0
Pr2
dPO First defrost after start up
n ÷ y
N
Pr2
dAF Defrost delay after fast freezing
0 ÷ 23h 50 min.
2
Pr2
FANS
FnC Fans operating mode
C-n, C-y, O-n, O-y
O-n
Pr2
Fnd Fans delay after defrost
0÷255 min.
10
Pr2
FSt
Fans stop temperature
-50,0÷110°C / -58÷230°F
2/35
Pr2
