Emerson Dixell XC15CX Wiring diagram

XC15CX
XC35CX

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INDEX
1. GENERAL WARNING ................................................................................................................ 5
1.1 PLEASE READ CAREFULLY BEFORE USING THE DEVICE .................................................................5
1.2 SAFETY INSTRUCTIONS ................................................................................................................5
2. GENERAL DESCRIPTION ........................................................................................................... 5
3. OPERATIONAL TOOLS .............................................................................................................. 6
3.1 RATIOMETRIC PRESSURE TRANSDUCERS (0-5VDC)......................................................................6
3.2 PIPE MOUNTING TEMPERATURE PROBE: NP4-67 ........................................................................6
3.3 MONITORING ADAPTER TOOL: XJ485CX ......................................................................................7
4. WIRING & ELECTRICAL CONNECTIONS ..................................................................................... 7
4.1 SAFETY INSTRUCTIONS ................................................................................................................7
4.2 WIRINGS DIAGRAMS....................................................................................................................7
4.2.1 High Voltage Models (110VAC, 230VAC) .............................................................................7
4.2.2 Low Voltage Models (24VAC)...............................................................................................8
4.3 RATIOMETRIC (0-5VDC) PRESSURE AND TEMPERATURE PROBES ................................................8
4.3.1 General Warnings ................................................................................................................8
4.4 DIGITAL INPUTS ...........................................................................................................................9
4.5 ANALOGUE OUTPUT: OAN...........................................................................................................9
4.6 POWER OUTPUT: OA3 (TRIAC).....................................................................................................9
4.6.1 HIGH VOLTAGE POWER SUPPLY MODEL (110 O 230VAC)..................................................10
4.6.2 LOW VOLTAGE POWER SUPPLY MODEL (24VAC)...............................................................11
5. MOUNTING & INSTALLATION ................................................................................................ 12
6. FIRST INSTALLATION ............................................................................................................. 12
6.1 PRESSURE TRANSDUCERS..........................................................................................................12
7. USER INTERFACE ................................................................................................................... 13
7.1 DISPLAY .....................................................................................................................................13
7.2 KEYBOARD.................................................................................................................................13
7.3 ICONS ........................................................................................................................................14
8. SET-POINT MENU .................................................................................................................. 14
8.1 SETPOINTS VISUALIZATION........................................................................................................14
8.2 SETPOINTS MODIFICATION........................................................................................................15
9. INFO MENU........................................................................................................................... 15
10. SERVICE MENU...................................................................................................................... 15
11. ALARM MENU ....................................................................................................................... 16
11.1 TYPE OF ALARM EVENTS RECORDER ......................................................................................16
11.2 ALARM MENU VISUALIZATION...............................................................................................17
11.3 ALARM RESET ........................................................................................................................17
12. PARAMETER PROGRAMMING ............................................................................................... 17

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12.1 “PR1” MENU ..........................................................................................................................17
12.2 “PR2” MENU ..........................................................................................................................17
12.3 PARAMETER VALUE MODIFICATION ......................................................................................18
13. KEYBOARD LOCK ................................................................................................................... 18
14. HOT-KEY................................................................................................................................ 18
14.1 UPLOAD: CONFIGURATION TRANSFER FROM DEVICE TO HOT-KEY........................................18
14.2 DOWNLOAD: CONFIGURATION TRANSFER FROM HOT-KEY TO DEVICE .................................18
15. PARAMETERS ........................................................................................................................ 19
15.1 REGULATION SET-POINT........................................................................................................19
15.2 READING FILTER.....................................................................................................................19
15.3 PROBE CONFIGURATION........................................................................................................19
15.3.1 Suction Probe Configuration: .............................................................................................19
15.3.2 Condensing Probe Configuration .......................................................................................20
15.3.3 Other Probes Configuration ...............................................................................................20
15.4 DISPLAY .................................................................................................................................20
15.5 COMPRESSOR CONFIGURATION............................................................................................20
15.6 DISCHARGE LINE TEMPERATURE ALARM ...............................................................................21
15.7 COMPRESSOR SAFETIES.........................................................................................................22
15.8 VENTILATOR MANAGEMENT .................................................................................................22
15.9 PHASE-CUT VENTILATOR CONTROL (OUTPUT OA3) ...............................................................22
15.10 ALARMS .................................................................................................................................23
15.11 DYNAMIC SETPOINT...............................................................................................................24
15.12 ANALOGUE OUTPUT (OAN)....................................................................................................24
15.13 BUMP FUNCTION...................................................................................................................24
15.14 ANTI-RESONANCE..................................................................................................................25
15.15 OUTPUT CONFIGURATION.....................................................................................................25
15.16 DIGITAL INPUTS .....................................................................................................................26
15.17 OTHER....................................................................................................................................26
16. REGULATORS ........................................................................................................................ 27
16.1 DIGITAL COMPRESSOR REGULATION.....................................................................................27
16.1.1 How Digital Regulation works............................................................................................27
16.1.2 Capacity decrement and regulation stop...........................................................................28
16.1.3 Digital compressor capacity limitation by using parameters PMi and PMA ......................28
16.2 INVERTER CONTROLLED COMPRESSOR .................................................................................29
16.2.1 How regulation works........................................................................................................30
16.2.2 Capacity decrement and regulation stop...........................................................................30
16.2.3 Capacity limitation by using parameters PMi and PMA.....................................................30
16.3 DEAD BAND REGULATION......................................................................................................30
16.4 PROPORTIONAL BAND REGULATION .....................................................................................31
16.4.1 COMPRESSOR ROTATION...................................................................................................31
16.5 VENTILATOR REGULATION.....................................................................................................31
16.5.1 ON-OFF VENTILATORS .......................................................................................................31
16.5.2 PHASE-CUT CONTROL FOR VENTILATORS ..........................................................................31
16.5.3 ELECTRONIC VENTILATORS ................................................................................................32
16.5.4 SILENT MODE.....................................................................................................................32
17. SPECIAL FUNCTIONS .............................................................................................................. 33
17.1 DYNAMIC SET-POINT .............................................................................................................33
17.1.1 HOW IT WORKS .................................................................................................................33

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17.2 ANALOGUE REPEATER ...........................................................................................................33
17.3 “BUMP” FUNCTION................................................................................................................34
17.4 COMPRESSOR CAPACITY LIMITATION IN CASE OF HIGH CONDENSER
PRESSURE/TEMPERATURE ....................................................................................................................34
17.5 PRESSURE PROBE ERROR MANAGEMENT AT START-UP.........................................................34
17.6 READING FILTER.....................................................................................................................35
18. DIGITAL INPUTS..................................................................................................................... 35
18.1 DIGITAL INPUT DISABLED –IXF=NU .........................................................................................35
18.2 REGULATION ENABLED –IXF=ENB...........................................................................................35
18.3 LOW AND HIGH PRESSURE ALARMS –IXF=LP OR HP................................................................35
18.3.1 TEMPORARY REGULATION LOCK .......................................................................................35
18.3.2 PERMANENT REGULATION LOCK .......................................................................................36
18.4 ENERGY SAVING ACTIVATION –IXF=ES...................................................................................36
18.5 SILENCE MODE –IXF=SIL.........................................................................................................36
18.6 GENERIC EXTERNAL ALARM –IXF=EAL....................................................................................36
18.7 LOCK ALARM –IXF=BAL...........................................................................................................37
18.8 SECURITY INPUT –IXF=OAX.....................................................................................................37
18.9 REVERSE ANALOGUE OUTPUT ACTION –IXF=REV...................................................................37
19. ALARMS ................................................................................................................................ 37
19.1 BUZZER MUTING AND RELAY DEACTIVATION ........................................................................38
19.2 TABLE: ALARM CONDITIONS ..................................................................................................38
20. TECHNICAL SPECIFICATIONS .................................................................................................. 40

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1. GENERAL WARNING
1.1 PLEASE READ CAREFULLY BEFORE USING THE DEVICE
This manual is an integral part of the product and should be kept near the instrument for
easy and quick reference.
The regulator should not be used in applications different from those described below.
Moreover, it can not be used as a safety device.
Before proceeding check carefully the limits of application.
Dixell Srl reserves the right to change the composition of its products, even without notice,
ensuring the same and unchanged functionality.
1.2 SAFETY INSTRUCTIONS
Check the supply voltage before connecting the instrument.
Do not expose to water or moisture: use the controller only within the operating limits
avoiding sudden temperature changes with high atmospheric humidity to prevent formation
of condensation
Warning: disconnect all electrical connections before any kind of maintenance.
The instrument must not be opened.
In case of failure or faulty operation send the instrument back to the distributor or to
“DIXELL s.r.l.” (See address) with a detailed description of the fault.
Consider the maximum current which can be applied to each relay (see Technical Data).
Ensure that the wires for probes, loads and the power supply are separated and far enough
from each other, without crossing or intertwining.
Fit the probe where it is not accessible by the end user.
In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful
2. GENERAL DESCRIPTION
The XC35CX is a regulator for tandem condensing units. It can drive inverter-controlled
compressors, digital compressors or standard ON-OFF compressors. It is equipped with:
1 or 2 relay outputs to drive ON-OFF compressors of ventilators, or for alarm signalling;
1 TRIAC output for ventilator speed modulation in phase-cut mode (MAX current 2.2 A)
1 analogue output (0-10Vdc or PWM type) for electronic ventilators control, inverter
management or proportional repeater
Up to 3 digital inputs free of voltage for external alarm management
2 analogue inputs to be used with ratiometric pressure transducer (0-5Vdc)
Up to 4 temperature probe inputs NTC10k, NTC86k or PT1000 type
On the other side, the XC15CX differentiates itself by having only a 16 A relay. All functionalities
described in the following manual are common for both XC15CX and XC35CX (with the only exception
of function related to second 5 A relay).

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3. OPERATIONAL TOOLS
Description
Code
Kit for female plug-in terminals @110 or
230VAC
DA000009 60
Kit for female plug-in terminals @24VAC
DA000009 70
TTL to RS485 adapter
XJ485CX + CABRS02
Suction Pressure Transducer
PPR15 (0T15 bar)
Discharge Pressure Transducer
PPR30 (0T30 bar)
Programming parameter tool
HOT KEY 4K
3.1 RATIOMETRIC PRESSURE TRANSDUCERS (0-5VDC)
PPR15
2.0m, 0T15 bar
Code: BE079302 00
PPR30
2.0m, 0T30 bar
Codice: BE079302 02
3.2 PIPE MOUNTING TEMPERATURE PROBE: NP4-67
The NP4-67 temperature probe can
be used on the discharge line to
monitor the discharge temperature
of the compressor.
NP4-67:
1.5m NTC probe type
Temperature range: -40+110°C
Cable length: 1.5mt
Code: BN609001 52

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3.3 MONITORING ADAPTER TOOL: XJ485CX
This is a TTL to RS485 physical layer external
adapter. It must be inserted on the TTL 5-pin
port to convert the TTL output into a 2-wire
RS485 output.
4. WIRING & ELECTRICAL CONNECTIONS
4.1 SAFETY INSTRUCTIONS
Before connecting cables make sure the power supply complies with the instrument. Separate
the probe cables from the power supply cables, from the outputs and the power connections.
Do not exceed the maximum current allowed on each relay (16_A or 5_A resistive burden). In
the case of higher current burden, please use a suitable external power contactor.
4.2 WIRINGS DIAGRAMS
4.2.1 High Voltage Models (110VAC, 230VAC)
TRIAC output oA3 is internally connected to the power supply LINE (L, terminal number 3)
Follow instructions on par. 4.3 for probe connections
Analogue output oAn can be a PWM (positive on terminal 18) or 0-10Vdc (positive on terminal 17)
type.
All digital inputs are free of voltage type
Model XC15CX has only a 16_A relay (oA1), TRIAC output (oA3) and analogue output (oAn)

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4.2.2 Low Voltage Models (24VAC)
TRIAC output oA3 is internally connected to the power supply LINE (A1, terminal number 1)
Follow instructions on par. 4.3 for probe connections
Analogue output oAn can be a PWM (positive on terminal 18) or 0-10Vdc (positive on terminal 17)
type.
All digital inputs are free of voltage type
Model XC15CX has only a 16_A relay (oA1), TRIAC output (oA3) and analogue output (oAn)
4.3 RATIOMETRIC (0-5VDC) PRESSURE AND TEMPERATURE
PROBES
4.3.1 General Warnings
In case of using of terminal ends pay attention there are no bear parts which could cause short
circuiting or introduce noise disturbance at high frequencies. To minimize the induced
disturbances, use shielded cables with the shield connected to earth.
Pressure probes (0-5Vdc):
Pay attention to the polarity
Pb1 = 13(+5Vdc) - 14(in) - 16(GND)
Pb2 = 13(+5Vdc) - 15(in) - 16(GND)
Temperature probes: keep all cables far away from the power cables. Use shielded cable to
lengthen the cables.
NTC10k: Pb1 (13-14) e Pb2 (13-15)
NTC10k or PT1000 or NTC86k: Pb3 (19-21) e Pb4 (19-20)
Pay attention that available temperature probes for analogue inputs Pb3 and Pb4 depends on
the HW. The possible combinations are: NTC10k or NTC86k and PT1000

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Temperature probes (NTC10k)
Pb1 (P1C = NTC): 13-14
Pb2 (P2C =NTC): 13-15
Temperature probes (NTC10k, PT1000, NTC86k)
Pb3 (P3C = NTC, PT1000, NTC86k): 19-21
Pb4 (P4C = NTC, PT1000, NTC86k): 19-20
Ratiometric transducers (0.5÷4.5Vdc)
Pb1 (P1C = 0-5)
13 (+); 14(in); 16 (gnd)
Pb2 (P2C =0-5)
13 (+); 15(in); 16 (gnd)
4.4 DIGITAL INPUTS
D.I.1: available if probe P3 in not available (P3P=no)
D.I.2: always available
D.I.3: available if probe P4 in not available (P4P=no)
NOTE: all digital inputs are free of voltage input types
4.5 ANALOGUE OUTPUT: OAN
Output PWM: 17(-); 18(+)
Output 0-10Vdc: 17(+); 18(-)
4.6 POWER OUTPUT: OA3 (TRIAC)
There are 2 different models, characterized by a different TRIAC power supply stage. As
general rule, the TRIAC is always internally connected to the device power supply line.

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4.6.1 HIGH VOLTAGE POWER SUPPLY MODEL (110 O 230VAC)
!!! WARNING: oA3 (TRIAC) OUTPUT is internally connected to the power supply line. DO
NOT CONNECT LOW VOLTAGE LOADS !!!
Loads:
2 Compressors ON-OFF
type
1 Ventilator controlled in
phase-cut mode
Loads:
1 Digital scroll compressor
1 Compressor ON-OFF
type
1 Electronic ventilator
Load:
1 inverter-controlled
compressor
1 Compressor ON-OFF
type
1 Ventilator controlled in
phase-cut mode

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4.6.2 LOW VOLTAGE POWER SUPPLY MODEL (24VAC)
!!! WARNING: oA3 (TRIAC) OUTPUT is internally connected to the power supply line. DO
NOT CONNECT HIGH VOLTAGE LOADS !!!
Loads:
1 Digital Compressor
@110 or @230VAC
1 Compressor ON-OFF
type
1 Electronic ventilator

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5. Mounting & installation
The instruments are suitable only for internal use. Instruments shall be mounted on panel, in a
29x71 mm hole, and fixed using the special brackets supplied.
The ambient operating temperature range is between -10T60°C.
Avoid locations subject to heavy vibration, corrosive gases or excessive dirt. The same applies
to the probes. Ensure ventilation around the instrument.
78,5
36,9
59,5
28,5
6
70
29
71
6. FIRST INSTALLATION
PRELIMINARY CONFIGURATION CHECK:
Check pressure transducer range: P1i, P1E, P2i e P2E
Check unit of measurement for both compressor and ventilator regulators
6.1 PRESSURE TRANSDUCERS
Use the following parameters to set pressure probe range for both P1 (suction probe) and P2
(discharge probe):
P1i, P2i: set the measurment value corresponding to 0.5V
P1E, P2E: set the measurment value corresponding to 4.5V
These parameters need to be set with the boundaries of the operating range of the pressure
probe.
Procedure:
1. Enter programming menu by keeping SET+DOWN pressed for 3 sec

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2. Enter the “Pr2” programming level by keeping SET+DOWN pressed for 7 sec
3. Select par. Pxi (reading value corresponding to 0.5V)
4. Use SET button and change the lower value by using UP or DOWN buttons
5. Press SET button con confirm and save the new value. After that the PxE (reading value
corresponding to 4.5V) will be showed on the display
6. Use SET button and change the higher value by using UP or DOWN buttons
7. Press SET button con confirm and save the new value. After that the next parameter will
be showed on the display.
Follow the above steps also for pressure probe P2 range modification (par. P2i and P2E).
CONTROL WITH PRESSURE GAUGE:
Check that the measurements of the probes (both suction and discharge) correspond to the
pressure gauge reading. Generally, the pressure transducers do not require recalibration.
7. USER INTERFACE
7.1 DISPLAY
7.2 KEYBOARD
Standard visualization:
It is used to see and modify the SETPOINT values. In programming
mode, it is used to modify a parameter or confirm an operation
ALARM menu:
Keep it pressed for 3 sec in order to reset an alarm
(UP) Programming mode:
It is used to browse the parameter list
With inserted HOT-KEY:
start the parameter UPLOAD function (from HOTKEY to internal
memory)
INFO menu:
It is used to browse the INFO menu
(DOWN) Programming mode:
It is used to browse the parameter list
With inserted HOT-KEY:
start the parameter DOWNLOAD function (from internal memory to the
HOTKEY)
INFO menu:
It is used to browse the INFO menu

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Manual load restart:
if par. r1F=rSt, press this button to restart the loads and previously
stopped due to safety alarm
ON-OFF:
if par. r2F=onF, keep this button pressed for 3 sec to switch ON and
OFF the instrument
SERVICE / CLOCK: to enter CLOCK and SERVICE menu
STORED ALARMS:
it gives access to the stored alarms
KEY COMBINATION
UP + DOWN
To lock and unlock the keyboard
SET + DOWN
To enter the programming parameter menu
SET + UP
To exit from INFO and ALARM menu and from programming parameter
menu
7.3 ICONS
LED
STATUS
MEANING
ON
Unit of measurement for temperature is Celsius degrees
ON
Unit of measurement for temperature is Fahrenheit degrees
ON
Unit of measurement for pressure is Bar
ON
Unit of measurement for pressure is PSI
ON
Relay output oA1 enabled
BLINKING
Delay in relay output oA1 activation
ON
Relay output oA2 enabled
BLINKING
Delay in relay output oA2 activation
ON
Relay output oA3 enabled
BLINKING
Delay in relay output oA3 activation
ON
Analogue output active
ON
(SER) Service menu
BLINKING
(SER) Outputs in service mode
ON
(ALR) Alarm active
ON
(MEM) At least an alarm present into memory
BLINKING
(MEM) A new alarm is occured and need to be checked
ON
Energy Saving mode active
ON
Real Time Clock Menu
8. SET-POINT MENU
8.1 SETPOINTS VISUALIZATION
1. Press and release the SET button
2. SUCTION: the display will show the label St1 [Compressor setpoint]
3. Press the SET button again to show the value of St1

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4. DISCHARGE (if enabled): press the SET button once again
5. The display shows the label St2 [Ventilator setpoint]
6. Press the SET button again to show the value of St2
EXIT: Press both SET + UP or wait for 30 sec
8.2 SETPOINTS MODIFICATION
1. Press the SET button for 3 sec
2. The display will show St1
3. Press the SET button again to show the value of St1 (Compressor setpoint)
4. Change the value of SET by pressing the UP or DOWN
5. Press the SET button to save the set value in memory and move to the ventilator
setpoint
6. The display will show St2 (Ventilator setpoint)
7. Press the SET button again to show the value of St1
8. Change the value of St1 by pressing the UP or DOWN
EXIT: Press both SET + UP or wait for 30 sec without pressing any key.
9. INFO MENU
This menu is directly accessible from UP or DOWN buttons. The INFO menu allows the
visualization of some operating information. Use the UP and DOWN buttons to browse
between the variables of the INFO menu. The value of the displayed variable is accessed by
pressing the SET button.
NOTE: the following information will be displayed if and only if the corresponding function has
been enabled.
Variable
Meaning
P1
Probe P1 value (suction line)
P2
Probe P2 value (condensing line)
P3
Probe P3 value
P4
Probe P4 value
tdG
Modulation interval for digital compressors
PEr
TRIAC output activation (in percentage)
Aou
Analogue output value (in percentage)
rEL
Firmware release
FdY
Firmware release date (day)
FMn
Firmware release date (month)
FYr
Firmware release date (year)
EXIT: Press both SET + UP or wait for 60 sec without pressing any key.
10. SERVICE MENU
The SERVICE menu is accessible by using the SERVICE button. This menu allows reading the
values of any probe or digital input.
Variable
Meaning
n1H
Activation number for output oA1 (thousand of)
n1L
Activation number for output oA1 (unit of)
n2H
Activation number for output oA2(thousand of)
n2L
Activation number for output oA2(unit of)

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o1H
Number of working hours for output oA1 (thousand of)
o1L
Number of working hours for output oA1 (unit of)
o2H
Number of working hours for output oA2(thousand of)
o2L
Number of working hours for output oA2(unit of)
dPx
Real probe Px value
dix
Status of digital input “x”
bAu
Baudrate (for communication serial)
r1F
Function linked with Re-start button (immediate)
r2F
Function linked with Re-start button (timed, 3 sec)
S1F
Function linked with Service/Clock button (immediate)
S2F
Function linked with Service/Clock button (timed, 3 sec)
rSt
Restart regulation enabled in case of lockout alarm
rSC
Couter reset enabled
FdY
Firmware release date (day)
FMn
Firmware release date (month)
FYr
Firmware release date (year)
rEL
Firmware release
Ptb
Parameter map progressive number
Example: to calculate the number of activation of oA1 use the following formula:
n1H*1000+n1L.
11. ALARM MENU
The device is able to memorize:
The total number of alarm events for any managed alarm (max 999)
Type and duration of last 10 alarm events (ALx, x=0...9)
Moreover, after detecting a new alarm event:
If a NEW ALARM has been detected, it will be signaled by showing the relative code
on the display and by switching on the ALR icon and blinking the MEM icon
When at least one alarm is present into memory, the icon MEM will be switched on.
NOTE: after entering the ALARM menu the icon MEM will stop blinking and will stay ON. This is
used to indicate that all alarms in memory have been checked by an operator.
11.1 TYPE OF ALARM EVENTS RECORDER
The following table shows the available information of the alarm menu:
Alarm
Meaning
HA
High pressure/temperature alarm on the suction line
LA
Low pressure/temperature alarm on the suction line
H2
High pressure/temperature alarm on the discharge line
HLL
High pressure lockout alarm
L2
Low pressure/temperature alarm on the discharge line
dLt
High temperature alarm on compressor head
dLL
Lockout due to DLT alarm
ELP
Electronic pressure switch (warning)
ELL
Electronic pressure switch (lockout)
HP
High pressure alarm from external sensor (warning)
LP
Low pressure alarm from external sensor (warning)
HPL
High pressure alarm from external sensor (lockout)

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Alarm
Meaning
LPL
Low pressure alarm from external sensor (lockout)
11.2 ALARM MENU VISUALIZATION
1. Press the alarm archive (MEM) button
2. Scroll with UP or DOWN button up to label AL0 (first alarm event memorized)
3. Press SET button to enter the event submenu
4. The encoding label relative to the logged event (par. 11.1) will be displayed
5. Press SET button again to display the duration of the alarm event recorded
NOTE: the visualization rules of the duration of any alarm event are the following:
a. Resolution is 1 min for a duration from 0 to 900 min
b. Resolution is 10 min for a duration from 15h00min to 99h.50min (on the
display: 15.0 to 99.5)
c. Value of fixed to 99h.50min, with blinking decimal point, in the case of
exceeding this limit
6. Press the SET button to move to the next alarm event
11.3 ALARM RESET
1. Enter the ALARM menu
2. To reset the alarm list, keep the SET button pressed for 5 sec until the message "CLr"
blinks on the display
3. To reset the only event displayed, keep the ALR button pressed for 3 sec until the
message "rSA" blinks on the display
NOTE: the current alarms will not reset
12. PARAMETER PROGRAMMING
12.1 “PR1” MENU
To access the parameter list Pr1 (user level), proceed as follows:
1. Keep both SET+DOWN buttons pressed for 3 sec
2. The display will show the name of the first parameter in the list
3. Press the SET key to access to the stored value
4. Change the value of the parameter using the UP and DOWN buttons
5. Press the SET button to store the new value and move to the next parameter
EXIT: press the SET+UP or wait for 30 seconds without pressing any key.
NOTE: the new value will be stored even in case the exit from the programming menu is by
timeout.
12.2 “PR2” MENU
To access the Pr2 parameter list (protected level), proceed as follows:
1. Enter the menu Pr1
2. Keep both SET+DOWN buttons pressed for 7 sec
3. The display will show the label "Pr2" (blinking)
EXIT: press the SET+UP or wait for 30 sec without pressing any key.
NOTE: each parameter in Pr2 level can be moved to the Pr1 level (user level) by pressing both

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SET+DOWN buttons. A parameter placed at the level Pr1 will be indicated by switching on the
decimal point toghether with the parameter label.
12.3 PARAMETER VALUE MODIFICATION
The following procedure is valid both for Pr1 and Pr2 levels:
1. Access the required programming menu
2. Select the parameter to modify by using UP or DOWN buttons
3. Press the SET button to display the actual parameter value
4. Change the value by using UP or DOWN buttons
5. Press the SET button to store the new value and move to the next parameter
EXIT: press SET+UP or wait for 30 sec without pressing any key.
NOTE: the new value will be stored even in case the exit from the programming menu is by
timeout.
13. KEYBOARD LOCK
To prevent any random modification of the operating parameters it is possible to lock the
keypad:
KEY LOCK: keep both UP and DOWN buttons pressed for 3 sec: the message "PoF"
indicates that the keyboard is locked.
UNLOCK THE KEYBOARD: keep both UP and DOWN buttons pressed for 3 sec:
the message "Pon" will indicate that the keyboard is unlocked.
14. HOT-KEY
By using the HOT-KEY programming tool (Code DK00000100) it is possible to transfer any
configuration to and from the internal memory device.
14.1 UPLOAD: CONFIGURATION TRANSFER FROM DEVICE TO HOT-
KEY
1. Insert an HOT-KEY into the 5-pin port paying attention to the polarity
2. Press the UP button: the message “uPL”will be displayed during the upload
operation. At the end of the operation the label “End”will blink on the display
3. Press the SET button and the label “End”will stop flashing
4. Turn off the device and remove the HOT-KEY. After that turn on again the device
NOTE: the “Err” message on the display indicates that the operation is not successful (transfer
error or incorrect key). In this case, press the UP button again to restart the upload operation or
remove the HOT-KEY to abort this operation.
14.2 DOWNLOAD: CONFIGURATION TRANSFER FROM HOT-KEY TO
DEVICE
1. Turn off the device
2. Insert an HOT-KEY on the 5-pin port paying attention to the polarity and then turn on
again the device
3. The list of parameters present into the HOT-KEY memory will be automatically
downloaded into the device memory. The word “doL”will appear during this operation.
At the end of this operation the display will blink the “End”label
4. After 10 sec the device will restart automatically

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5. Remove the key HOT-KEY
NOTE: the "Err" message on the display indicates that the operation is not successful (transfer
error). In this case, turn off and then on again the device in order to restart the operation or
remove the HOT-KEY to abort the operation.
15. PARAMETERS
15.1 REGULATION SET-POINT
St1
SETPOINT 1 for compressor regulation (suction line): LS1 to US1
St2
SETPOINT 2 for ventilator regulation (condensing line): LS2 to US2
HY1
Regulation band for SETPOINT 1:
- P1C=ntC 0.1 to 25.5°C; 1 to 45°F
- P1C=0-5 0.1 to 9.9 bar; 1 to 999 PSI
LS1
Minimum value for SETPOINT 1:
- P1C=NTC: -40.0°C to US; -40°F to US
- P1C=0-5: P1i to US [bar, PSI]
US1
Maximum value for SETPOINT 1:
- P1C=NTC: LS to 110.0°C; LS to 230°F
- P1C=0-5: LS to P1E [bar, PSI]
HY2
Regulation band for SETPOINT 2:
- P2C=ntC 0.1 to 25.5°C; 1 to 45°F
- P2C=0-5 0.1 to 9.9 bar; 1 to 999 PSI
LS2
Minimum value for SETPOINT 2:
- P2C=NTC: -40.0°C to US; -40°F to US
- P2C=0-5: P1i to US [bar, PSI]
US2
Maximum value for SETPOINT 2:
- P2C=NTC: LS to 110.0°C; LS to 230°F
- P2C=0-5: LS to P1E [bar, PSI]
ESC
Offset for SETPOINT 1 when in energy savin mode:
-P1C=ntC -50.0 to 50.0°C; -90 to 90°F
-P1C=0-5 -20.0 to 20.0 bar; -300 to 300 PSI
ESF
Offset for SETPOINT 2 when in energy saving mode:
-P2C=ntC -50.0 to 50.0°C; -90 to 90°F
-P2C=0-5 -20.0 to 20.0 bar; -300 to 300 PSI
15.2 READING FILTER
FiL
Filter for pressure probe reading enabled: n=filter disabled; Y=filter enabled
FiC
Coefficient for pressure probe reading filter: 0 to 100, 100=filter disabled;
mEd=avarage value during last period (tdG)
15.3 PROBE CONFIGURATION
15.3.1 Suction Probe Configuration:
P1P
Suction probe P1: n=not available (compressor regulation disabled); Y=available
(compressor regulation enabled)
P1C
Suction transducer configuration:
0-5= ratiometric transducer (5.0Vdc)
ntC=temperature probe NTC 10k
P1i
Start of scaling for pressure transducer P1:(-1.5 to P1E bar; -21 to P1E PSI) it is
the pressure value measured from sensor corresponding to 0.5Vdc

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P1E
End of scaling for pressure transducer P1:(P1i to 99.9 bar; P1i to 999 PSI) it is
the pressure value measured from sensor corresponding to 4.5V
P1F
Pressure transducer P1 calibration: depending on the type of sensor as follow
P1C=0-5 -12.0 to 12.0 bar; -200 to 200 PSI
P1C=ntC -12.0 to 12.0°C; -21 to 21°F
P1d
Pressure probe P1 reading error delayed (valid if P1C=0-5): 0 to 255 min
15.3.2 Condensing Probe Configuration
P2P
Condensing probe P2: n=not available (regulation disabled); Y=available
(regulation enabled)
P2C
Condensing transducer configuration:
0-5= ratiometric transducer (5.0Vdc)
ntC=temperature probe NTC 10k
P2i
Start of scaling for pressure transducer P2:(-1.5 to P2E bar; -21 to P2E PSI) it
is the pressure value measured from sensor corresponding to 0.5Vdc
P2E
End of scaling for pressure transducer: (P2i to 99.9 bar; P2i to 999 PSI) it is the
pressure value measured from sensor corresponding to 4.5V
P2F
Pressure transducer calibration: depending on the type of sensor as follow
P2C=0-5 -12.0 to 12.0 bar; -200 to 200 PSI
P2C=ntC -12.0 to 12.0°C; -21 to 21°F
P2d
Pressure probe reading error delayed (valid if P2C=0-5): 0 to 255 min
15.3.3 Other Probes Configuration
P3P
Probe P3 presence: n=not available; Y=available
P3C
Probe P3 configuration(*)
n86=temperature probe NTC86k
ntC=temperature probe NTC10k
Pt1=temperature probe PT1000
P3F
Calibration: -12.0 to 12.0°C; -21 to 21°F
P4P
Probe P4 presence: n=not available; Y=available
P4C
Probe P4 configuration(*)
n86=temperature probe NTC86k
ntC=temperature probe NTC10k
Pt1=temperature probe PT1000
P4F
Calibration: -12.0 to 12.0°C; -21 to 21°F
dEr
Delay before activating probe error: 0 to 255 sec
(*)The support of the various types of probes depends on the model.
15.4 DISPLAY
Unt
Unit of measurement for pressure: bar, PSI
CF
Unit of measurement for temperature: °C=Celsius degree; °F=Fahrenheit degree
dLY
Delayed visualization: 0 to 255 sec
Lod
Variable visualization: P1; P2; P3; St1=SETPOINT1 value; St2=SETPOINT2
value; PEr=TRIAC activation in percentage; Aou=analogue output in percentage
15.5 COMPRESSOR CONFIGURATION
CPb
Compressor regulation probe: nP; P1; P2; P3; P4
rtY
Type of regulation: db=dead band; PrP=proportional band
CPo
Compressor power (valid for tandem units): SPo=same power; dPo= different
power