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14. DISPLAY MESSAGES
Mess.
Cause
None of digital inputs configured as CCL are
"nA"
activated
The Ped time is elapsed and the regulation is
"PF"
stopped
"P1"
Temperature probe fault
"P2"
Pressure transducer fault
"HSH" High superheat alarm
"LSH" Low superheat alarm
"LPL" Low pressure limit
"MoP" Maximum Operating Pressure
"LoP" Lowest Operating Pressure
"StF" Start Function enabled
"StP" Regulation stop caused by Std and Sti
"EE"
Memory error
14.1 ALARM RECOVERY
Probe alarms "P1", "P2" start few seconds after the fault in the probe; they automatically stop few
seconds after the probe restarts normal operation. Check connections before replacing the probe. Max.
And min. Alarms "HSH", "LSH", "MoP" and "LoP" automatically stop as soon as the variable returns to
normal values.
The instrument is provided with an internal check verifying memory integrity. Alarm "EE" will flash when
a failure in the internal memory is detected. In such case call the service.
15. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: 4 DIN modules 70x135mm with male and female connectors; depth 60mm.
Mounting: DIN RAIL mounted in an omega (3) din rail.
Protection: IP20.
Connections: pluggable screw terminal block 2.5 mm
Power supply: 24Vac/dc ±10%.
Power absorption: depending on connected valve 20VA max.
Display: three digits with icons, red LEDs, height 14.2 mm.
Inputs:
1 temperature probe:
PT1000 probe: -50 to 110°C (-58 to 230°F).
NTC probe: -40 to 110°C (-40 to 230°F).
1 pressure transducer: 4 to 20mA or 0 to 5V.
Digital inputs: Digital input 1 (15-13): free of voltage.
Digital input 2 (8-9): free of voltage.
Outputs for valve: bipolar or unipolar valves.
Data storage: on the non-volatile memory (EEPROM).
Kind of action: 1B.
Pollution degree: normal.
Software Class: A.
Operating temperature: 0 to 55°C (32 to 131°F).
Storage temperature: -25 to 60°C (-13 to 140°F).
Relative humidity: 20 to 85% (no condensing).
Resolution: 0.1°C or 1°F.
Precision a 25°C (77°F): ±0.7°C ±1digit.
16. STANDARD VALUES
Label
Description
Set
SH set point in chiller mode
Set
SH set point in heat pump mode
FtY
Kind of gas
Peo
Probe Error opening percentage
Ped
Probe Error delay before stopping regulation
tEU
Type of Stepper motor
tEP
Automatic Valve configuration
HFS
Kind of driving
LSt
Minimum number of steps
USt
Maximum number of steps
ESt
Extra steps in closing phase
Sr
Step rate
CPP
Current per phase (only bipolar valves)
Holding current per phase (only bipolar
CHd
valves)
oPE
Start opening Percentage
SFd
Start Function duration
MnF
Maximum opening percentage
FoP
Forced Opening time-out
PI PARAMETERS (trained staff)
Pb
Proportional band, chiller mode
rS
Band Offset
inC
Integration time chiller mode
dFc
Derivative time chiller mode
Pb2
Proportional band. Heat pump mode
It2
Integration time Heat pump mode
dt2
Derivative time Heat pump mode
db
Dead band width
PROBE PARAMETERS
tPP
Type of pressure transducer
Probe value at 4mA or at 0V (related to PrM
PA4
parameter)
1592025930 XEV23D GB r1.0 07.10.2011.doc
Outputs
Valve closed
Valve closed after PEd. There is a probe
error
According to PEo and PEd.
According to PEo and PEd.
By PI
Valve Closed
see LPL parameter
see dML parameter
see dML parameter
see SFd parameter
Valve closed
-
wiring.
2
Default
Level
Range
-
0,0÷24,0°C; 0÷43°F
6.0
-
0,0÷24,0°C; 0÷43°F
6.0
R22; 134; 404; 407;
407
Pr1
410; 507; Co2
50
Pr1
0 to 100 %
0 to 239 s; on
on
Pr1
bp
Pr1
uP; bP
nu
Pr1
0 to 10
FUL
Pr1
HAF; FUL
0
Pr1
0; USt (*10)
0
Pr1
LSt to 800 (*10)
0
Pr1
0 to 255 (*10)
10
Pr1
10 to 600 step/s
0
Pr1
0 to 100 (*10mA)
0
Pr1
0 to 100 (*10mA)
85
Pr1
0 to 100 %
1.3
Pr1
0.0 to 42min 00s, res. 10s
0 to 100 %
100
Pr1
nu
Pr1
0 to 100 %; nU
[0.1 to 50.0°C]
10.0
Pr1
[1 to 90°F]
[-12.0 to 12.0°C]
0.0
Pr1
[-21 to 21°F]
120
Pr1
0 to 255 s
0
Pr1
0 to 255 s
[0.1 to 50.0°C]
10.0
Pr1
[1 to 90°F]
120
Pr1
0 to 255 s
0
Pr1
0 to 255 s
[0.1 to 50.0°C]
5.0
Pr1
[1 to 90°F]
420
Pr1
420; 5V;
[-1.0 to P20 bar]
0
Pr1
[-14 to P20 psi]
Probe value at 20mA or at 5V (related to PrM
P20
parameter)
oPr
Pressure probe calibration
ttE
type of temperature probe
otE
Temperature probe calibration
DIGITAL INPUTS
i1P
Free of voltage digital input polarity
i1F
Free of voltage digital input function
d1d
Digital input 1 (free of voltage) activation delay
i2P
Main voltage digital input polarity
i2F
Main voltage digital input function
d2d
Digital input 2 (Main voltage) activation delay
ALARMS
dAo
Alarm delay after restarting regulation
tdA
Type of alarm signalled by relay
Lower pressure limit for superheat regulation
LPL
(related to PrM parameter)
Maximum
operating
pressure
MoP
(related to PrM parameter)
Minimum suction pressure limit (related to PrM
LoP
parameter)
PHy
Pressure alarm Hysteresis
dML
delta MoP-LoP
MSH
Maximum superheat alarm
LSH
Lowest superheat alarm
SHY
Superheat hysteresis
SHd
Superheat alarm activation delay
FrC
Fast-Recovery Constant
DISPLAY
Lod
Local display
CF
Temperature measurement units
PMu
Pressure measurement unit
rES
Resolution (only °C)
PrM
Type of pressure (Absolute / relative)
CLP
Cooling call percentage
tP1
Temperature probe value
PPr
Pressure probe value
tP2
Temperature converted from pressure probe
oPP
Acutal Opening percentage
d1S
Free of voltage digital input state
d2S
Main voltage digital input state
Mod
Modbus type
Adr
Serial address
Ptb
Parameters map
rEL
Release software
Pr2
Second level menu
XEV23D
[ PA4 to 50.0 bar]
30
[PA4 to 725 psi]
[-12.0 to 12.0 bar]
0
[-174 to 174 psi]
Ntc
PT1000; ntC
[-12.0 to 12.0°C]
0.0
[-21 to 21°F]
CL
CL; oP
CCL
CCL; rL
0
0 to 255 min
CL
CL; oP
CCL, rL
CCL
0
0 to 255 min
10.0
0.0 to 42min 00s, res. 10s
ALL
ALL; SH; PrE; Di
[PA4 to P20 bar]
n
[PA4 to P20 psi]
threshold
[LoP to P20 bar]
0.5
[LoP to P20 psi]
[PA4 to MoP bar]
11.0
[PA4 to MoP psi]
[0.1 to 5.0 bar]
0.5
[1 to 72 psi]
0.1
0 to 100%
[LSH to 80.0°C]
30
[LSH to 176°F]
[0.0 to MSH°C]
80.0
[0 to MSH°F]
[0.1 to 25.5°C]
2.5
[1 to 77°F]
0.1
0 to 255 s
120
0 to 100 s
SH
SH; PEr; P1; P2
°C
°C; °F
bar
bAr; PSi
dE; in
De
Rel
rEL; AbS
Read only
---
---
Read only
Read only
---
---
Read only
Read only
---
Read only
---
Read only
---
Std; AdU
---
1
1 to 247
1
- - -
1.2
- - -
---
- - -
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
Pr1
-
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