Dixell xc15cx ошибка cannot - Не ошибается лишь тот, кто ничего не делает!

Dixell XC15CX — контроллер предназначен для управления одно- и двухкомпрессорными агрегатами. Он может управлять простыми компрессорами, компрессорами с преобразователями частоты и компрессорами Digital. Контроллер имеет: 1 релейный выход (16 А), 1 тиристорный выход, 1 аналоговый выход (0-10В или ШИМ), 3 цифровых входов без напряжения, 2 аналоговых входа, 4 температурных датчика (NTC10k, NTC86k или PT1000).

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Корпус	самозатухающий пластик ABS
Размеры	передняя панель 32×74мм, глубина 60мм
Монтаж	в вырез на панели 29×71мм
Класс защиты	IP20
Класс защиты лицевой панели	IP65
Подключения	штекерные разъемы под проводники  2.5 мм
Напряжение питания (переменный ток)	в зависимости от модификации 24В, ±10%, 50/60Гц 110В ±10%, 50/60Гц 230В ±10%, 50/60Гц
Энергопотребление	3.5 ВА
Дисплей	3 разряда, красные светодиоды высотой 14.2 мм
Входы датчиков	до 4-х датчиков NTC10k / NTC86k или PT1000, до 2-х входов для ратиометрических датчиков 0-5В
Цифровые входы	до 3 без напряжения
Выходы	oA1: SPST 16(8) A, 250VAC oA3 (Triac): (в зависимости от модели) 0,5A при 250В или 120В; 1,5A при 24В oAn (0-10В): макс 20мА
Зуммер	опция
Сохранение данных	в энергонезависимой памяти (EEPROM)
Хранение истории аварий в памяти при снятии питания	24 часа
Рабочая температура	-10 ÷ 55°C (14 ÷ 131°F)
Температура хранения	-20 ÷ 85°C (-4 ÷ 185°F)
Относительная влажность	20 ÷ 85% (без конденсата)
Диапазон измерений датчиками температуры	NTC10k: -40 ÷ 110°C (-40 ÷ 230°F) NTC86k: -40 ÷ 180°C (-40 ÷ 356°F) PT1000: -100 ÷ 200°C (-148 ÷ 392°F)
Разрешение	0,1°C или 1°C; 1°F; 0.1бар; 1 PSI
Точность (наружная температура. 25°C)	±0.7°C ±1 разряд

Контроллер Dixell XC15CX имеет:
— 1 релейный выход для управления компрессорами или вентиляторами или аварийной сигнализации;
— 1 тиристорный выход для управления скоростью вращения вентиляторов в режиме фазорезки (макс. ток 2.2 A) или соленоидным клапаном компрессора Digital;
— 1 аналоговый выход (0-10В или ШИМ) для управления ЕС-вентиляторами, преобразователями частоты или режима пропорционального повторителя;
— До 3-х цифровых входов без напряжения для мониторинга аварий;
— 2 аналоговых входа для ратиометрических датчиков давления (0-5В);
— До 4-х температурных датчиков NTC10k, NTC86k или PT1000.

XC15CX имеет 10 стандартных конфигураций системы (заводские конфигурации). Эти конфигурации позволяют сократить время необходимое для настройки контроллера. При необходимости можно вручную выполнить все настройки.

Код	Конфигурация	Настройки выходов
C1	1 компрессор Digital Scroll 1 EC или ВКЛ/ВЫКЛ вентилятор Температуры в °C, давление в бар	oA1 и oA3: настроены, не изменяются oA2 и oAn: настраиваются
C2	Как C1 но настройки в °F и PSI	oA1 и oA3: настроены, не изменяются oA2 и oAn: настраиваются
C3	1 компрессор с ПЧ 1 вентилятор ВКЛ/ВЫКЛ или фазорезка Температуры в °C, давление в бар	oAn: настроен, не изменяется oA1, oA2 и oA3: настраиваются
C4	Как C3 но настройки в °F и PSI	oAn: настроен, не изменяется oA1, oA2 and oA3: настраиваются
C5	1 простой компрессор 1 вентилятор ВКЛ/ВЫКЛ или с плавной регулировкой Температуры в °C, давление в бар	oA1: настроен, не изменяется oA2, oA3 и oAn: настраиваются
C6	Как C5 но настройки в °F и PSI	oA1: настроен, не изменяется oA2, oA3 и oAn: настраиваются
C7	2 простых компрессора 1 вентилятор с плавной регулировкой Температуры в °C, давление в бар	oA1 и oA2: настроены, не изменяются oA3 и oAn: настраиваются
C8	Как C7 но настройки в °F и PSI	oA1 и oA2: настроены, не изменяются oA3 и oAn: настраиваются
C9	Тандем (1 компрессор Digital Scroll + 1 простой компрессор) 1 вентилятор с плавной регулировкой Температуры в °C, давление в бар	Все oAx: настроены, не изменяются
C10	Как C9 но настройки в °F и PSI	Все oAx: настроены, не изменяются

Источник

Manuals
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Emerson Manuals
Controller
Dixell XC15CX
Installing and operating instructions

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Summary of Contents for Emerson Dixell XC15CX

Page 1
XC15CX XC35CX…
Page 2: Table Of Contents

INDEX GENERAL WARNING …………………… 5 PLEASE READ CAREFULLY BEFORE USING THE DEVICE …………..5 SAFETY INSTRUCTIONS ……………………5 GENERAL DESCRIPTION ………………….5 OPERATIONAL TOOLS ………………….6 RATIOMETRIC PRESSURE TRANSDUCERS (0-5VDC) …………..6 PIPE MOUNTING TEMPERATURE PROBE: NP4-67 …………….6 MONITORING ADAPTER TOOL: XJ485CX ………………7 WIRING &…
Page 3
12.1 “PR1” MENU ……………………..17 12.2 “PR2” MENU ……………………..17 12.3 PARAMETER VALUE MODIFICATION ………………18 KEYBOARD LOCK ……………………18 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 PARAMETERS ……………………19 15.1 REGULATION SET-POINT ………………….19 15.2…
Page 4
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 DIGITAL INPUTS……………………35 18.1 DIGITAL INPUT DISABLED – ………………35 18.2 REGULATION ENABLED – ……………….35 18.3 LOW AND HIGH PRESSURE ALARMS –…
Page 5: General Warning

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.
Page 6: Operational Tools

3. OPERATIONAL TOOLS Description Code Kit for female plug-in terminals @110 or DA000009 60 230VAC 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)
Page 7: Monitoring Adapter Tool: Xj485Cx

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.
Page 8: Low Voltage Models (24Vac)

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.
Page 9: Digital Inputs

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 (+);…
Page 10: High Voltage Power Supply Model (110 O 230Vac)

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: …
Page 11: Low Voltage Power Supply Model (24Vac)

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 …
Page 12: Mounting & Installation

Mounting & installation The instruments are suitable only for internal use. Instruments shall be mounted on panel, in a 29×71 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.
Page 13: User Interface

Enter the “Pr2” programming level by keeping SET+DOWN pressed for 7 sec Select par. Pxi (reading value corresponding to 0.5V) Use SET button and change the lower value by using UP or DOWN buttons 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 Use SET button and change the higher value by using UP or DOWN buttons Press SET button con confirm and save the new value.
Page 14: Icons

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…
Page 15: Setpoints Modification

DISCHARGE (if enabled): press the SET button once again The display shows the label St2 [Ventilator setpoint] 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 Press the SET button for 3 sec The display will show St1 Press the SET button again to show the value of St1 (Compressor setpoint)
Page 16: Alarm Menu

Number of working hours for output oA1 (thousand of) Number of working hours for output oA1 (unit of) Number of working hours for output oA2 (thousand of) Number of working hours for output oA2 (unit of) Real probe Px value Status of digital input “x”…
Page 17: Alarm Menu Visualization

Alarm Meaning Low pressure alarm from external sensor (lockout) 11.2 ALARM MENU VISUALIZATION Press the alarm archive (MEM) button Scroll with UP or DOWN button up to label AL0 (first alarm event memorized) Press SET button to enter the event submenu The encoding label relative to the logged event (par.
Page 18: Parameter Value Modification

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: Access the required programming menu Select the parameter to modify by using UP or DOWN buttons Press the SET button to display the actual parameter value Change the value by using UP or DOWN buttons…
Page 19: Parameters

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. PARAMETERS 15.1 REGULATION SET-POINT SETPOINT 1 for compressor regulation (suction line): LS1 to US1…
Page 20: Condensing Probe Configuration

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 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 …
Page 21: Discharge Line Temperature Alarm

Offset for differential HY1: used to move the regulation band above and below St1 P1C=NTC, PT1000  0.0 to 25.5°C; 0 to 45°F P1C=0-5  0.0 to 9.9 bar; 0 to 999 PSI Proportional Integral (PI) time: integration time for PI-regulator that acts on the compressor.
Page 22: Compressor Safeties

Temperature value for compressor warning: P3, P4=NTC  -40 to 110°C; -40 to 230°F P3, P4=NTC86k  -40 to 180°C; -40 to 356°F P3, P4=PT1000  -40 to 180°C; -40 to 356°F Differential for DLT alarm deactivation: 0.1 to 25.5°C; 1 to 50°F Delay in DLT alarm activation: 0 to 255 sec Cooling time after detecting a DLT alarm: 0 to 255 min Number of DLT alarms detected before activating the compressor lockout: (0…
Page 23: Alarms

Differential for phase-cut regulator: 0 to 100% Lower limit for output oA3: input value (FPb) corresponding to the minimum output power (Po1) NTC10k  -40 to 110°C; -40 to 230°F NTC86k  -40 to 180°C; -40 to 356°F PT1000  -40 to 180°C; -40 to 356°F Ratiometric Pressure probe …
Page 24: Dynamic Setpoint

Delay for temperature/pressure alarm activation on condenser: 0 to 255 min Compressor stopped in case of any HAF alarm: n; Y Compressor capacity limitation in case of any HAF alarm: 0 to 80%, if HFL=0 the compressor will be stopped. Delay before stopping the compressor in case of any HAF alarm: 1 to 999 sec Max number HAF alarms before stopping the regulation: (0 to 15) after detecting PnF alarms of the HAF type in an interval of time PiF, the regulation will…
Page 25: Anti-Resonance

Interval of time with compressor OFF before activating the BUMP function: 0.0 to 23h50min, res. 10 min 15.14 ANTI-RESONANCE Anti-resonance function enabled: n; Y Lower boundary of the first skipped band: If frequency output: 0 to SE1 Hz If voltage output: 0.0 to SE1 V Upper boundary of the first skipped band: If frequency output: SE1 to 500Hz If voltage output: SE1 to 10V…
Page 26: Digital Inputs

Analogue output: nu=output not used onF=output activated when controller in ON ALr=alarm output EFn=electronic ventilator control PrP=analogue repeater inV=inverter-controlled compressor output Buzzer enabled: n; Y 15.16 DIGITAL INPUTS Digital inputs 1 and 3 depend on the presence of probe P3 and P4 respectively. Digital input 2 is always available.
Page 27: Regulators

REGULATORS 16.1 DIGITAL COMPRESSOR REGULATION Set par. oA1 and oA3 as below indicated to manage Digital (Scroll or Stream D4D) compressors: oA1=dGt or d4d oA3=dGt or d4d The cooling demand acts on the Digital compressor that, unless of alarms, delays or par. FrC=n, is the first to be activated and the last to be deactivated.
Page 28: Capacity Decrement And Regulation Stop

NOTE: If the pressure exceeds the [SET+0.5*HY1] value and the Digital compressor is not available (due to the timer delay 2on, 2oF or because of digital input alarm lockout), another compressor will be started (if available). 16.1.2 Capacity decrement and regulation stop When the pressure goes below the value [SET-0.5*HY1] the Digital compressor will be controlled in PWM modulation, at the minimum allowable capacity, for the time toF.
Page 29: Inverter Controlled Compressor

16.2 INVERTER CONTROLLED COMPRESSOR The management of inverter controlled compressor requires setting the output as follows: oAn=inV oA1=inV Other parameters related to the regulation are described in the following table: Parameter Description Regulation band for St1 Differential HY1: it is used to move the regulation band above and below the St1 value.
Page 30: How Regulation Works

It is possible to drive inverter with control signal of frequency or voltage (0-10 V DC) type. NOTE: the analog output is not configurable. It may be frequency or voltage type depending on the hardware. 16.2.1 How regulation works The regulation starts when the value of the pressure/temperature of the suction line increases and reaches the St1 value.
Page 31: Proportional Band Regulation

16.4 PROPORTIONAL BAND REGULATION This kind of regulation is available only for ON-OFF compressors (oA1=CP1 and oA2=CP2) and if par. rtY=Pbr The activation of compressors follows this chart: 16.4.1 COMPRESSOR ROTATION This function is available in case of compressors of equal power and if CPo=SPo. By using this function (par.
Page 32: Electronic Ventilators

Lto: lower limit Hto: upper limit toH: differential Po1: minimum output value (in percentage) Po2: maximum output value (in percentage) 16.5.3 ELECTRONIC VENTILATORS If par. oAn=EFn, then the analogue output can be used to control electronic ventilators (with input signal command 0-10Vdc). Regulation is proportional in the band defined from par. HY2: When VAL=St2 the analogue output will be forced to Ao1 When St2 <…
Page 33: Special Functions

During preset intervals of time the maximum allowed speed will be fixed to par. FSS (in percentage). The silent mode will be deactivated as soon as an alarm is detected. SPECIAL FUNCTIONS 17.1 DYNAMIC SET-POINT This function is used to move the condensing regulation band (par. St2 and HY2) and use another (external) temperature (par.
Page 34: Bump» Function

17.3 “BUMP” FUNCTION This feature is available only using ON-OFF compressors and if par. bMp=Y. When regulation starts, the compressor will be activated and deactivated for a nub number of cycles and with a duration respectively set in par. bon and boF. During the «BUMP» phase pressure/temperature alarms are ignored.
Page 35: Reading Filter

17.6 READING FILTER It is possible to activate a reading filter which acts on the analogue input values (eg. Pressure/temperature values coming from probes). Following the involved parameters: FiC=mEd, the used value for regulation is the average value calculated on the interval of time tdG FiC=1…100, the used value for regulation is the one calculated by an exponentially weighted moving average filter with coefficients FiC/100.
Page 36: Permanent Regulation Lock

18.3.2 PERMANENT REGULATION LOCK If during the interval of time defined from the par. diA there is nPx digital input activations, then the permanent lock will be enabled. In this situation: alarm LED and digital output set as alarm (oAx=ALr) will be activated; all the compressor outputs (oA1, oA2) will be deactivated (delayed of 1 sec each from the other);…
Page 37: Lock Alarm — Ixf=Bal

18.7 LOCK ALARM – ixF=bAL The digital input reports an external alarm conditions which causes the lock of the device. In this case: alarm LED and digital output set as alarm (oAx=ALr) will be activated; all the compressor outputs (oA1, oA2) will be deactivated (delayed of 1 sec each from the other);…
Page 38: Buzzer Muting And Relay Deactivation

19.1 BUZZER MUTING AND RELAY DEACTIVATION If any alarm condition is active, the buzzer can be muted by pressing any button. Moreover, keeping any button pressed for more than 3 sec will deactivate also the alarm relay. 19.2 TABLE: ALARM CONDITIONS CODE DESCRIPTION DUE TO ACTION RESET…
Page 39
CODE DESCRIPTION DUE TO ACTION RESET Compressor Perform Manual by powering off and on the maintenance maintenance device warning Ventilator Perform Manual by powering off and on the maintenance maintenance device warning EEPROM Contact Dixell Hardware problem memory error Service Set RTC Automatic after error condition configuration…
Page 40: Technical Specifications

TECHNICAL SPECIFICATIONS Housing: self-extinguishing ABS Case: frontal 32×74 mm; depth 60mm Mounting: panel mounting in a 71x29mm panel cut-out Protection: IP20; Frontal protection: IP65 Connections: quick connect tabs terminal block  2.5 mm wiring Power supply: according to the model 24VAC, ±10% 110AC 10%, 50/60Hz 230VAC 10%, 50/60Hz…

Источник

This feature is available only using ON-OFF compressors and if par. bMp=Y. When regulation

starts, the compressor will be activated and deactivated for a nub number of cycles and with a

duration respectively set in par. bon and boF. During the «BUMP» phase pressure/temperature

alarms are ignored.

17.4 COMPRESSOR CAPACITY LIMITATION IN CASE OF HIGH

CONDENSER PRESSURE/TEMPERATURE

If pressure/temperature measured from probe FPb>HAF, then the compressor capacity will be

able to be limited in the following way:

—

By using par. HFL (if Digital or inverter-controlled compressor) for dHF interval of

time. After that, the compressor will be stopped if the alarm condition persists and if

HFC=YES

—

Immediately stopped after dHF interval of time if ON-OFF compressor.

17.5 PRESSURE PROBE ERROR MANAGEMENT AT START-UP

At powering on, a pressure error probe will be signaled after the P1d delay expires. If pressure

error probe persists, the ON-OFF compressor will be activated following par. Con and CoF.

If regulation is stopped because of:

—

Safety delays

—

External alarms (from digital input)

—

Pressure alarms

then any measured pressure value out of the probe range will not raise any additional alarm but

the display will show the last valid measured value.

1592001530 XC15-35CX EN r1.2 11.04.2017

XC15-35CX

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Источник

Digital controller for variable speed compressors

XRi77CX

GENERAL WARNING…………………………………………………………………………………………………………….. 1

GENERAL DESCRIPTION……………………………………………………………………………………………………… 1

CONTROLLING LOADS…………………………………………………………………………………………………………. 1

VARIABLE SPEED COMPRESSOR CONTROL ……………………………………………………………………. 1

PULL DOWN ………………………………………………………………………………………………………………………….. 2

DUAL MAP FEATURE …………………………………………………ERROR! BOOKMARK NOT DEFINED.

FRONT PANEL COMMANDS ………………………………………………………………………………………………… 2

MAX & MIN TEMPERATURE MEMORIZATION …………………………………………………………………….. 2

MAIN FUNCTIONS…………………………………………………………………………………………………………………. 2

10. PARAMETERS ………………………………………………………………………………………………………………………. 3

11. DIGITAL INPUTS ……………………………………………………………………………………………………………………. 4

12. RS485 SERIAL LINE – FOR MONITORING SYSTEMS ………………………………………………………… 5

13. INSTALLATION AND MOUNTING …………………………………………………………………………………………. 5

14. ELECTRICAL CONNECTIONS ………………………………………………………………………………………………. 5

15. HOW TO USE THE HOT KEY………………………………………………………………………………………………… 5

16. ALARM SIGNALS …………………………………………………………………………………………………………………… 5

17. TECHNICAL DATA…………………………………………………………………………………………………………………. 5

18. WIRINGS ……………………………………………………………………………………………………………………………….. 5

19. DEFAULT SETTING VALUES………………………………………………………………………………………………… 5

1. GENERAL WARNING

1.1 PLEASE READ BEFORE USING THIS MANUAL



This manual is part of the product and should be kept near the instrument for easy and quick

reference.

The instrument shall not be used for purposes different from those described hereunder. It cannot be



used as a safety device.



Check the application limits before proceeding.



Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring

the same and unchanged functionality.

1.2 SAFETY PRECAUTIONS

Check the supply voltage is correct 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.



Fit the probe where it is not accessible by the End User. 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.

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

Model XRi77CX, format 32x74mm, is microprocessor based controller, suitable for applications on

medium or low temperature ventilated refrigerating units. It has four relay outputs to control

compressor, fan, defrost, which can be either electrical or reverse cycle (hot gas) and light

(configurable). It could be provided with a Real Time Clock which allows programming of up to six

daily defrost cycles, divided into holidays and workdays. A «Day and Night» function with two different

set points is fitted for energy saving. It is also provided with up to four NTC probe inputs. The first

probe is used for temperature control. The second probe is used to control the defrost termination

temperature at the evaporator. One of the two digital inputs can operate as third temperature probe.

The fourth probe is used to control the condenser temperature (for condenser alarm management) or

to display a temperature.

The RS485 serial output allows connecting the unit to a network line (ModBUS-RTU compatible)

such as any dIXEL monitoring units of X-WEB family. The HOT-KEY receptacle allows

programming the controller by using an HOTKEY programming device.

The instrument is fully configurable through special parameters that can be easily programmed

through the frontal keyboard.

3. CONTROLLING LOADS

3.1 COMPRESSOR

The regulation is performed according

to the temperature measured by the

thermostat probe with a positive

differential (HY) over the set point: if the

temperature increases and reaches set

point plus differential, the compressor

will start. It will turn off as soon as the

temperature reaches the set point value

again.

In case of fault in the thermostat probe the start and stop of the compressor are timed through

parameters Con and CoF.

3.2 DEFROST

Two defrost modes are available through the tdF parameter: defrost through electrical heater

(tdF=EL) and hot gas defrost (tdF=in).

The defrost interval depends on the presence of the RTC (optional). The internal RTC is controlled

by means of the EdF parameter:

EdF=in: the defrost is made every idF time – standard way for controller without RTC.

—

EdF=rtC: the defrost is real time controlled, depending on the hours set in the parameters

—

Ld1…Ld6 (for workdays).

Other parameters are used to control defrosting cycles: the maximum length (MdF) and defrosting

modes: timed or controlled by the evaporator’s probe (P2P).

RNC-2014-034 XRi77CX GB r1.0 07.03.2014.docx

At the end of defrost dripping time is started, its length is set in the Fdt parameter. With Fdt=0 the

dripping time is disabled.

3.3 CONTROL OF EVAPORATOR FANS

The fan control mode is selected by means of the FnC parameter:

FnC=C_n, fans will switch ON and OFF with the compressor and not run during defrost.

FnC=o_n, fans will run even if the compressor is off, and not run during defrost.

After defrost, there is a timed fan delay allowing for drip time, set by means of the Fnd parameter.

FnC=C_Y, fans will switch ON and OFF with the compressor and run during defrost.

FnC=o_Y, fans will run continuously also during defrost.

An additional parameter FSt provides the setting of temperature, detected by the evaporator probe,

above which the fans are always OFF. This is used to make sure circulation of air only if his

temperature is lower than set in FSt.

3.3.1 FORCED ACTIVATION OF FANS

This function managed by the FCt parameter is designed to avoid short cycles of fans, that could

happen when the controller is switched on or after a defrost, when the room air warms the

evaporator. How it works: if the temperature difference between evaporator probe and room probe

is higher than the FCt parameter value, fans will be switched on. With FCt=0 the function is disabled.

3.3.2 CYCLIC ACTIVATION OF THE FANS WITH COMPRESSOR OFF

When FnC=C-n or C-Y (fans working in parallel with the compressor), by means of the Fon and FoF

parameters the fans can carry out on and off cycles even if the compressor is switched off. When the

compressor is stopped the fans go on working for the Fon time. With Fon=0 the fans remain always

off, also when the compressor is off.

3.4 RELAY CONFIGURATION (PAR. oA0, oA1, oA2, oA3)

The functioning of the configurable relays (terminals 1-2 and 1-7-8) can be set by the oA1 and oA2

parameters, according to the kind of application. In the following paragraph the possible setting:

3.4.1 LIGHT RELAY

With oAx=LiG the related relay operates as light output.

3.4.2 AUXILIARY RELAY

Relay activation by digital input 1 or digital input 2 (oAx=AUS, i1F or i2F=AUS): with oAx=AUS

and i1F, i2F=AUS the AUX relay is switched on and off by digital inputs.

3.4.3 ON/OFF RELAY (OAX = ONF)

When oAx=onF, the related relay is activated when the controller is turned on and de-activated

when the controller is turned off.

3.4.4 NEUTRAL ZONE REGULATION

With oAx=db the related relay can control a heater element to perform a neutral zone action.

oAx cut in = SET-HY



oAx cut out = SET

3.4.5 ALARM RELAY

With oAx=Alr the related relay operates as alarm relay. It is activated every time an alarm happens.

Its status depends on the tbA parameter: if tbA=Y, the relay is silenced by pressing any key.

If tbA=n, the alarm relay stay on until the alarm condition recovers.

3.4.6 SECOND COMPRESSOR

If oAx=CP2, it will work as second compressor output. The anti-short cycle parameter AC1 gives the

possibility to desynchronize the compressor activations.

3.4.7 SECOND DEFROST OUTPUT

If oAx=dF2, it will work as second defrost output.

NOTE: It is also possible to manage 2 different and independent defrost by using special parameter

map. Please refer to Dixell to activate this function.

3.4.8 NIGHT BLIND MANAGEMENT DURING ENERGY SAVING CYCLES

With oAx=HES, the related relay operates to manage the night blind: the relay is energised when the

energy saving cycle is activated by digital input or frontal button.

3.4.9 HEATER FOR WATER DRIPPING

If oAx=Het, the related output will work as heater for water dripping during and after any defrost.

3.4.10

REGULATION OUTPUT

If oAx=inV, the related output will work as regulation output and will stay active as soon as the

regulation request is running.

4. VARIABLE SPEED COMPRESSOR CONTROL

The controller is able to drive variable speed compressor with frequency control input. The HOTKEY

port is able to issue a frequency signal from 30 to 200Hz, duty cycle=50%. A special cable (CAB-

KXV1) is used to connect the frequency output of the controller to the frequency input of the

compressor. One of the available relays can be set as oAx=inV in order to control the condenser

fan. In this case the fans will be activated only when the regulation is running.

NOTE: in case of using an inverter compressor, it must be controlled ONLY from the frequency

output. DO NOT USE ANY RELAY TO CONTROL THE COMPRESSOR POWER SUPPLY.

4.1 CABLE FOR FREQUENCY OUTPUT

CAB/KXV1

4.2 PARAMETERS

The following parameters are used to set the regulation:

HY1

Differential for proportional band: (0.1 to 25.5°C; 1 to 45°F)

PMi

Lower speed limit (in percentage): (0 to PMA)

PMA

Upper speed limit (in percentage): (Pmi to 100%)

XR77CX

The wiring polarity follows:

WHITE  GND (-)

GREEN  FREQ (+)

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