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1. r2 Maximum set allowed to the user C rl 199 C F 90 13 Ed alarm enabling defrost interrupted for timeout E 0 1 flag 0 J ANA Yes ooo oau EE EE E EE EE r4 Automatic variation of the night time set point curtain switch C 20 20 C F 3 0 closedy AE EE EE E E EE EE LIS Enable min and max temperature monitoring C o 5 flag 0 r Night time variation with third probe C 0 1 flag 0 1 night with curtain lowered regulation with probe 3 __ 0 night regulation with the virtual probe __ rt Min and max temperature measuring interval F 0 199 hours rH Max temperature measured in the interval rt F C F rL Min temperature measured in the interval rt F C F 2 NOTE the to LAN column in the table identifies the parameters that can or can not be transferred via LAN from the Master to the Slave Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 49 CU Compressor start delay when the instrument is turned ON C 0 15 min 0 cl Minimum time between two successive compressor starts C 0 15 min 0 c2 Minimum compressor off time C 0 15 min 0 c3 Minimum compressor on time C 0 15 min 0 c4 Relay safety 0 compressor always OFF C 0 100 min 0 100 compressor always ON cc Continuous c
2. User manual LEGGI E CONSERVA QUESTE ISTRUZIONI 4 READ AND SAVE THESE INSTRUCTIONS CARE Technology amp Evolution LEGGI E CONSERVA gt QUESTE ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS We wish to save you time and money We can assure you that a thorough reading of this manual will guarantee correct installation and safe use of the product described CONTENTS General T RR OR OO 2 1 Main features of the multiplexed Master Slaveuni une nasse 3 me Models A A sl RR iii 5 K D HT 1 1 5 cT NO 6 3 1 Electrical Connection er OE EAE EAEE OE E EEE T E E E E E E EEE 6 de User mterlace Butons and display sson Lila 1 4 1 MI DI iaa A E E E ee asad E E E idee ti 7 4 2 Operon indication AAA SI O O ili 7 4 3 yD N S EAE ne Meee ciara ee O TRI 7 S Conneuratiom o bthe controllers onanirao HEERES HER HH EHER ba Elle 9 5 1 Conticuration of ine conte ollers as Master or Slave allaccia il 9 D2 Sclecune the principalOperaune parae EiS T 9 DES Other Important parameters lo ni aci edito een este er 10 5 4 Important parameters for all units Master Slave listan ii 10 NI Listof parameters to be checked durne installation acilia lea asia 11 O Programmine alal 12 6 1 Aces SNe TING Parameter std ti iii 12 6 2 Modivins the parametefS suscita aa 12 6 3 Exitns the Prosrammins ETS T bidello 13 6 4 Manualreboot Of the Controller amina a er 13 Je Broeramm me by remote G 1 6 1 euere 14 7 1 Remote cont
3. cf 72 poo A6 Compressor stop set Duty Setting from external alarm C 0 100 min 0 A4 1 or 2 a5 1 or 2 0 compressor always OFF __ 100 compressoralwaysON 0 o A7 Detection delay time for the delayed alarm input A4 2 or C 0 199 min 0 e od A EC 44 Ad Temperature alarm delay C 0 199 min 120 A8 Configuration of the instrument s virtual digital input C 0 7 0 A9 Enable propagation via LAN of the second digital input on the Master 1 propagation 0 no propagation Enable remote alarm signals from Slaves on the Master 1 C 0 1 flag 1 remote alarm signals enabled A0 Alarm and fan differentials This parameter represents the differential used for activating the high and low temperature alarms AL and AH see the diagram below and for the control of the fans see F parameters In the case of the alarms as can be seen from the diagram the value AO contributes to determining the points at which the temperature alarms actually occur Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 2 0 degrees allarme bassa temperatura allarme alta temperatura low temperature alarm high temperature alarm set point AH High temperature alarm It allows the high temperature alarm to be set The value of AH does not indicate the temperature at which the alarm is given but rather the maximum devia
4. rl r2 C F 10 0 IC Regulation probe calibration F 20 20 C F 0 0 2 Measurement stability C l 15 l J3 Probereadingrte CL ts Pa 4 Virtual probe between probe 1 and probe 3 C 0 100 0 pro te 1 100 probe3 SS 5 orgaen CC 1 eo ss L 6 Decimal point enabling Q No 1 Yes c_ 1 fm 0 17 Display on main display and repeater 0 repeater not present 1 3rd probe reading only on repeater C 0 3 flag 0 2 3rd probe reading also on main display 3 virtual probe reading on the main display and defrost probe on repeater E E E E E E EEE 1 8 3rd probe calibration c 20 20 ecrr 00 9 Defrost with probe 3 C 0 1 flag 0 1 the defrost in temperature ends when the temperature measured by probe 3 is gt the temperature set for parameter d o d Deos probe calibration c 20 20 ecerepoo A Defrost probe present C 0 3 flag 3 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present 2 defrost probe present and probe 3 absent __ 3 both defrost probe and probe 3 present Fd r REGULATION PARAMETERS Type Min Max UOM Def To LAN New rd Regulator differential hysteresis F 0 1 20 C F 2 0 rl Minimum set allowed to the user C 50 r2 C F 50
5. Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 34 When the alarm ceases the unit resumes normal temperature control operation WARNING If AS 1 the alarm can be activated by a specific command from the supervisory system if the latter exploits the functions supplied by the MPXs or on Slave units where A8 1 by the opening of the digital input DIN2 on the Master Important note it should be remembered that to guarantee the safety of the unit in the case of serious alarms the unit itself must always be fitted with all the electro mechanical safety devices needed to ensure correct operation A4 A5 A8 2 input associated to delayed external alarm The significance connection and operating mode are similar to those already indicated for the parameter A4 1 However when A4 2 it is possible to delay the alarm signal for a period in minutes equivalent to value chosen for A7 After the set delay period the effects on the compressor fans defrost and continuous cycle are the same as when A4 A5 A8 1 A4 A5 A8 3 input associated to defrost activation An external contact can be connected to the multi function input to prepare for or to inhibit defrost When the contact is open defrost is inhibited and when closed defrost is possible If the contact is closed yet no defrost is requested the defrost is obviously not performed If the contact is closed and a defrost is in progress the opening of the digital input will end the cu
6. SPC RS485 4 RELAY TR RTC BUZZER IRMPX00000 IRMPX0M000 Di de O y O LIRMPX0A000 O E lt lt lt lt de IRMPX10000 O O lt lt y O IRMPX1M000 y O IRMPX1A000 i____ de lt lt de IRMPXM0000 T LIRMPXMM000 T de e de IRMPXMA000 lo lo lo Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 5 di Installation Actual installation 1 2 3 4 5 insert the instrument into the previously created opening fasten the instrument to the panel by sliding it onto the fastening bracket insert the rear connectors of the instrument into the corresponding pre wired connectors close the panel connect the power and configure the operating parameters 3 1 Electrical connections Warning Before performing electrical installation read the instructions and take careful note of the diagrams on the following pages cap 16 Remember that all safety devices necessary for correct operation must be fitted in advance To install the controllers the following cables must be pre wired to special connectors 12 way connector power LAN communication channel analogue probes digital inputs 14 way connector relay outputs The IRMPX M models feature RS485 serial connection using a special connector with removable terminals The RS485 connection is made to installations featuring a supervisory system Once the connections have
7. Dripping time d8 Alarm exclusion time after defrost d9 Defrost priority over compressor protection dC Choice of time base for cyclical defrost and the maximum defrost duration AO Fan alarm differential AH High temperature alarm upper band AL Low temperature alarm lower band A6 Compressor on time in the case of Duty Setting from external alarm A7 Delay time in detecting digital input Ad Delay in measuring the high and low temperature alarms FO Fan management always on or subject to fan controller Fl Fan set point F2 Fans off when compressor off F3 Fans off during defrost F4 Config fan relay as AUX if relay 4 is alarm Fd Fans off during post dripping How to perform a download To carry out a download on the unit configured as Master use the same procedure as for accessing the configuration parameters and enter the password 66 The lowest value digit on display of the Master will flash until the end of the download to all the Slave units Each Slave after having been configured by the Master will perform an auto reboot At the end of the download the lowest value digit on the Master will automatically stop flashing Download failed signal The Master will display the failure of a download to a Slave by showing the signal alternating with the temperature dX where X 1 2 5 that is the value of the parameter LA of the Slave for w
8. Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 9716600 http www carel com e mail carel carel com Agency cod 030220191 preliminary version rel 2 025 06 01
9. e press to display the associated value e increase or decrease the value using the and or y button until the desired value is displayed SEL e press again to temporarily confirm the new value and move onto the display of the parameter code PRG e press the gt button to save the new value and exit the parameter modification procedure Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 9 5 3 Other important parameters LAN configuration parameters For the Master e parameter Sn Slave number from 1 to 5 number of Slaves in the LAN during boot the display shows uM unit Master e parameters for setting defrost times hx mx x 1 2 8 hours and minutes of defrost times the tens of minutes can be set only if RTC is present e parameters hh and mm current hour and minute only if RTC is present For the Slaves e parameter SA Slave address address of the slave in the LAN during machine boot if configured as Slave uN is displayed where N SA e g ul if the address of the Slave in the LAN is 1 SA 1 5 4 Important parameters for all units Master Slave As indicated the instruments are factory programmed to measure both the high and the low temperature alarm The alarms set off the internal buzzer if fitted and show a code on the display HI for the high temperature and LO for the low temperature The conditions that generate a temperature alar
10. min 30 e d4 Defrost when the instrument starts 0 No 1 Yes C 0 1 flag 0 d5 Defrost delay when instrument starts or from digital input 0 199 min 0 o d6 Main display and repeater during defrost C 0 2 flag 1 0 No display block and the temperature alternates with the dF symbols on both displays 1 display is blocked on both displays dd Dripping time after defrost F 0 15 min 2 d8 High temperature exclusion time after defrost and if A4 5 AS F 0 15 hours 1 __ 5 or A8 5 alarm exclusion time from the opening of the door p C E d9 Defrost priority over compressor protection O No 1 Ye C 0 1 flag 0 e La 1 Defrost probe display S o E pere po dA Thirdprobe display s F cr duration dP 0 hours mins 1 mins secs d0 Type of defrost This parameter sets the type of defrost for units fitted with defrost relays 0 electrical heating element ends at temperature and or for timeout 1 hot gas ends at temperature and or for timeout 2 electrical heating element ends for timeout 3 hot gas ends for timeout Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d0 0 electrical defrost temperature end Time base for the intervals between defrosts and maximum C 0 1 flag 0 o dI Interval between cycli
11. where X is the address of the Slave in alarm X 1 5 If on the Master relay 4 is configured as an alarm relay H1 1 or H1 2 the alarm relay of the Master is also activated Available on all models if configured as Master Def 1 Monitoring enabled Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 37 11 10 F parameters for controlling the evaporator fans FO Fan management C 0 1 flag 0 0 fan always ON except in special cases see parameters F2 F3 Fd 1 fans thermostat controlled in accordance with the absolute set point Fl FI Fan start absolute set point Active ifFO 1 F 40 50 ecrr 5 0 F2 Fans OFF with compressor OFF 0 No Yes Active if FO 0 C 0 1 flag 1 F3 Fans OFF in defrost 0 No 1 Yes Active if FO 0 cl o 1 fag 1 F4 FAN relay configuration as AUX relay in this situation the fourth relay can be used as an alarm relay by setting H1 1 or H1 2 U the aux relay is the fourth relay C 0 2 flag 0 e 1 the aux relay is the fan relay local relay 2 the aux relay is the fan relay network relay The F parameters are available on the following models IRMPX10000 IRMPX1M000 IRMPX14000 IRMPXM0000 IRMPXMM000 IRMPXMA000 F0 Fans managed by fan controller The fans can be put under the control of the fan controller which manages them according to the temperature measured by the defrost and control pro
12. 0 or A 1 The instrument will in this way be informed that probe S2 has not been wired during pre installation and will use probe S1 to manage any temperature defrosts The absence of probe S2 will not generate any error signals ID TT probe S3 is not present set A 0 or A 2 this will avoid the signalling of the rE regulation error due to the detected disconnection of probe S3 that is an error due to the malfunctioning of one of the two probes which together determine the value of the virtual probe Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 3 probes S2 and S3 both present 11 5 r parameters for temperature regulation r REGULATION PARAMETERS Type Min Max UOM Def ToLAN New rd Regulator differential hysteresis F 0 1 20 C F 2 0 rl Minimum set allowed to the user C 50 r2 C F 50 12 Maximum set allowed to the user C rl 199 C F 90 13 Ed alarm enabling defrost interrupted for timeout C 0 1 flag 0 0 Nol Yes gt No CI L r4 Automatic variation of the night time set point curtain switch C 20 20 C F 3 0 A E LL __ O BER r5 Enable min and max temperature monitoring C 0 5 flag 0 1 night with curtain lowered regulation with probe 3 r6 Night time variation with third probe C 0
13. CODE CAUSE St Regulation probe Set Point 4 Virtual probe 5 Temperature unit of measure 6 Enable the use of the decimal point in the display of the temperature 7 Parameter for management of the repeater display and main display 9 Use third probe for defrost A Flag showing presence or not of defrost probe defrost with virtual probe rd Control differential rl Minimum set temperature allowed to the user r2 Maximum set temperature allowed to the user 13 Enable signalling of end defrost due to timeout r4 Variation in the daytime night time set point and vice versa r5 Enable Max and Min temperature monitoring r6 Enable night time regulation with the third probe CU Delay compressor start up on controller power up cl Minimum time between two successive compressor starts Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 20 c2 Minimum compressor off time c3 Minimum compressor on time c4 Compressor on time in Duty Setting mode cc Duration of continuous cycle c6 Exclusion time for low temperature alarm after continuous cycle dO Type of defrost dI Interval between defrosts dt End defrost temperature dP Maximum duration of one defrost d4 Defrost on instrument start up YES NO d5 Delay defrost on instrument start up d6 No temperature display during defrost dd
14. Slaves Available on all models Def 4 hours c6 Alarm cut out after continuous cycle operation The time in hours that the low temperature alarm is no longer monitored after a continuous cycle In practice if the temperature of the refrigerated unit following a continuous cycle falls due to inertia below the minimum temperature set point AL the monitoring of the relative alarm is delayed by the time c6 In theory the persistence of the conditions for a low temperature alarm at the end of a continuous cycle can be detected after a time equal to the sum of c6 hh Ad mm parameter Ad delay in minutes for the signalling of low high temperature alarm Please remember that at the minimum temperature set point AL the continuous cycle is deactivated Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 2 hours Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 29 11 7 d Parameters for defrost management dO Defrost types C 0 3 0 0 electrical ends by temperature and or for timeout 1 hot gas ends by temperature and or for timeout 2 electrical ends for timeout 3 hot gas ends for timeout dI Interval between two defrosts F 0 199 hours 8 activated for defrosts without RIC ll dt Defrost end temperature F 50 139 SCPE 4 dP Maximum defrost time F 1 199
15. address Sets an address for the unit for connection to a supervisory or telemaintenance system Also used for serial or network connection Available only on models IRMPX0M000 IRMPX1M000 IRMPXMM000 Def HO 0 H1 Configuration of the fourth relay This parameter allows the fourth relay to be configured as a local or network auxiliary relay or as an alarm relay in this case the parameter Hl also allows the selection of rest as the position of the alarm relay 0 auxiliary output 1 alarm relay normally closed 2 alarm relay normally open 3 auxiliary relay served by the master to the slaves on the master the action of the relay is propagated via the LAN to the slaves where the 4th relay is configured using H1 3 Available on models IRMPX10000 IRMPX1M000 IRMPX14000 IRMPXM0000 IRMPXMM000 IRMPXMA000 Def HI 3 the relay is configured as a network auxiliary H2 Enable remote control Enables or disables the use of the remote control for the instruments that feature this function H2 0 remote control enabled H2 1 remote control disabled Available on models IRMPX0A000 IRMPX1A000 IrmpxMA000 IRMPXMAC00 Def H2 1 H3 Instrument identification code for programming by remote control This parameter sets the code that enables the controller to receive the commands from the remote control If there are a series of instruments enabled for the use of the remote control when pressing the start bu
16. communication channel To modify the parameters using the keypad on the front panel proceed as described in the following paragraphs 6 1 Accessing the parameters To access the F parameters PRG press the 5 for more than 5 seconds in the case of an alarm condition silence the buzzer first the display shows the code of the first modifiable parameter C To access the C parameters press the and buttons simultaneously for more than 5 seconds the display shows 00 press either the 2 or dd button until 22 access password for the type C parameters appears SEL confirm by pressing the display shows the code of the first modifiable parameter that is C 6 2 Modifying the parameters Modifying parameters After having displayed the first parameter either C or F follow these instructions A press either or u until reaching the parameter whose value needs to be changed SEL press to display its current value increase or decrease its value using the or v key until reaching the required value SEL press to temporarily save the new value and display the code of the parameter again e To modify the values of the other parameters repeat all the operations from the modifying the parameters paragraph Saving the new values e Push the PRG button to save the new value s and exit from the parameter modification procedure Cod 030220191 rel 2 0 dated 25 06 01 preliminary vers
17. contact open daytime set point set point set by user interface using the SEL button For the night time set point the value of the set point is added to the value with sign of parameter r4 Thus the new set point is Daytime set point r4 The switching on of the lights is associated to the opening of the digital contact if the auxiliary relay is used as a light switch ATTENTION The daytime night time set point can be modified by a command from the supervisory system and or by the opening closing of the second digital input on the Master DIN2 if A9 1 on the Master unit on all units where A8 7 Practical example in a multiplexed sub network setting A8 7 on all units simply connect the second digital input of the Master to a switch to be able to manage the light relay and the variation of the set point for all the controllers Summary of the programmable digital inputs list of options Value Meaning Function A4 AS A8 0 input not active 1 immediate external alarm Contact open alarm active 2 external alarm with delay Contact open alarm active Delay see parameter A7 3 enable defrost Contact open defrost not enabled connect the digital input to a clock with power back up select A4 4 if the chosen input is DINI or A5 4 if the chosen input is DIN2 To exclude cyclical defrost automatically activated by the controller set dI 0 5 door switch Contact open door ope
18. d6 2 represent the same setting Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d6 1 during defrost the last temperature measured before the start of the defrost remains on the display Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 31 dd Dripping time This parameter makes it possible to shut down the compressor and the evaporator fans after a defrost so as to speed up the dripping from the evaporator The value of the parameter indicates the minutes of shut down If dd 0 no dripping time is provided for with the result that the compressor will be re activated immediately when defrost ends Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def dd 2 minutes d8 Period of alarm cut out after defrost and or open door This indicates the time for which a high temperature alarm will be inhibited at the end of a defrost and or after the door of a store room has been opened in the case of the Multi function input being connected to the door switch see parameter A4 A5 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d8 1 hour of cut out d9 Defrost priority over compressor protection This parameter cancels the compressor protection times cl minimum time between two successive start ups c2 minimum shut down time and c3 minimum
19. l flag 0 0 night regulation with the virtual probe rt Min and max temperature measuring interval F 0 199 hours rH Max temperature measured in the interval rt F C F rL Min temperature measured in the interval rt F C F Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 25 rd Regulation delta Sets the value of the differential or hysteresis used in regulating the temperature A narrow differential i e one with a low number ensures a temperature that differs little from the set point or optimal operating temperature but one that requires the frequent switching on and off of the main operating components normally the compressor It is possible to extend the life of the compressor by appropriately setting the parameters to define the number of start ups per hour and the minimum off period see the Compressor parameters In all MPX refrigeration units the differential 1s placed to the right of the set point as indicated below DIRECT operation Direct freddo cooling rd on attuatore off Set point Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def rd 2 0 r1 Minimum set allowed This parameter establishes the minimum value that can be given to the set point Using this parameter prevents the user from setting a set point lower than the value assigned t
20. remote control Each instrument has its own enabling code for the use of the remote control set by parameter H3 When H3 is assigned a value other than zero during the installation of the instruments the use of the remote control is disabled as default Only the START procedure see below can access the functions of the remote control in this case the value saved for H3 acts as the access code Assigning different H3 values for each instrument allows the same remote control to be used with different controllers The faulty pressing of buttons on the remote control for one minute disables the remote control in which case the START procedure is required before being able to use it again Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 14 7 3 Technical specifications Power supply 2 alkaline batteries 1 5V type UM 4 AAA IEC R03 Case plastic Dimensions 60x160x18mm Storage 25 C 70 C Operating temperature 0 C 50 C Type of transmission Infrared Weight 80 g without batteries 7 4 Description of the keypad The buttons can be divided into the following groups based on their functions e function buttons to activate deactivate the use of the remote control to access the alarm log and for the password entry prompt e pre programmed buttons to modify the main parameters e pre programmed buttons to send direct commands activate aux relay start defrost etc e buttons tha
21. the password 22 using the arrow buttons on the remote control e confirm by pressing the SEL button e press until parameter H3 is displayed on the controller e press SEL to display the value 00 default e use A to set the required code thus must be a value between 01 and 99 e press SEL to confirm the new value and return to the display of parameter H3 e press PRG to exit saving the code Removing the code Repeat the previous procedure assigning the value 00 to H3 In this way the remote control can be used without requiring the access code Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 16 7 6 3 ENABLING THE CONTROLLER FOR RECEIVING COMMANDS FROM THE REMOTE CONTROL e press the ENABLE button to enable the use of the remote control e the instrument will display a two digit code the value of parameter H3 enter the code displayed using the numeric keypad on the remote control The code must be entered correctly without ignoring the zeroes e g if the display on the controller shows 05 type O then 5 on the remote control e If the code entered corresponds to the code shown on the instrument full access is provided to the functions of the remote control and the controller enters parameter F programming mode the code C will be displayed corresponding to the parameter ambient probe calibration e If the code entered does not correspond to the code displayed the controller will immediately ex
22. their resistance directly as the temperature increases As can be seen in the diagram below the horizontal axis represents the operating range the vertical axis the error the NTC type of probe shows greater accuracy than the PTC version This is why the NTC probes have been adopted as standard Maximum variation of NTC and PTC temperature probes from theoretically assumed values 10 15 20 25 30 Tolerance of Carel NTC probe Tolerance of PTC probe 985 Ohms at 25 C C Calibration Offset for the ambient probe probe S1 The value assigned to this parameter is added to if positive or subtracted from if negative the temperature transmitted by the probe SI For example to reduce the temperature displayed by 2 3 degrees C should be set to 2 3 The calibration offset can be varied from 20 to 20 with precision to a tenth of a degree from 19 9 to 19 9 Available on all models Default is 0 0 i e no offset is applied to the probe s reading Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 23 2 Stability of measurement This parameter is used to control the stability with which the temperature is measured Low values assigned to this parameter produce a prompt response by the probe to variations in temperature however the display becomes correspondingly sensitive to changes High values slow down the response causing less fluctuation and a more stable reading Available on all models Default value
23. to it e inthe presence of an alarm condition flashing code of the alarm detected alternated to detected temperature value 4 2 Operating indications On the display are some signal areas see O O O and in the figure They indicate 4 compressor operating 4b continuous cycle active 5 fan operating 6 fourth relay energised 7 defrost in progress 8 decimal point 4 3 Keypad The buttons present on the front allow the following functions A aux goes to the next parameter increases the value associated with the parameter activates de activates the auxiliary output resets the remote alarm signal on Master unit resets the remote alarm and failed download signal on the Master if pressed together with button 1 activates the continuous cycle on start up displays the identification code of the software version loaded on the controller preceded by a graphic symbol if pressed for 5 seconds together with buttons 2 and 9 in normal operation resets the controller Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 7 SEL def stops the audible alarm for 10 minutes only if fitted if pressed for over 5 seconds accesses the menu of the type F parameters frequent if pressed for more than 5 seconds together with button 9 accesses the menu of the type C parameters configuration accesses the alarm log via password 44 activate
24. to the virtual digital inputs on all the connected Slave units as by default happens for the Master s virtual digital input The parameter A8 configures the virtual digital input of a MPX Note that this is used only as an analogy do not physically connect external switches to the LAN and RS485 inputs to access the functions associated with the virtual digital input The following is a description of the functions for each value of A4 A5 A8 A4 AS A8 0 corresponding input not active The Multifunction digital input is not used and is insensitive to variations closing opening of any externally connected contacts A4 AS A8 1 input associated to immediate external alarm It is possible to connect the digital input to an external alarm which will request immediate intervention for example a high pressure or compressor temperature alarm In particular the alarm is registered when the contact is opened normal operation being in the closed state Activation of the alarm produces a display signal see alarm Al the sounding of the buzzer if fitted and initiates the following actions compressor works in Duty Setting the ON times are however determined by the parameter A6 and not by the parameter c4 as in the case of a regulation error fan continues to work according to fan parameters F If the external alarm is registered during defrost or a continuous cycle control exits from the procedure
25. with RS 485 serial interface These inputs can be used to enable disable defrost to manage serious alarms that require the immediate e g high pressure or delayed e g low pressure shut down of the unit or for remote control by the Master models and or a supervisory system Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 3 Multifunction output A fourth relay is present to remote the alarm signal or to control the On Off command of accessory devices If the FAN relay is not used to control the fans it can be used as an auxiliary relay in this case the fourth relay can be used as an alarm relay Continuous cycle This function operates the ON routines of the compressor for a time t selected via a specific parameter This is particularly useful when a rapid drop in temperature is required Serial connection Some Master models are fitted with a built in RS 485 serial interface which allows them to be connected to a supervisory system These units can therefore act as a gateway between the supervisory system and the local multiplexed sub network they are part of Dimensions Even the most sophisticated model has standard dimensions The dimensions required on the panel are in fact 71x29 mm Index of protection In the MPX series the O RING inside the front panel and the material used for the keypad ensure the controller IP65 index of protection In addition a flat gasket is supplied as standard in order to increase the index o
26. 0 no Fans operate even if compressor is off F2 1 yes Fans are off when the compressor 1s off Parameter can be transferred via LAN from the Master to its connected Slaves Def F2 1 fans off when compressor off F3 Stop fans during defrost parameter operative only when F0 0 Selects whether the fans should operate during defrost Inactive if the fans are managed by the fan control F3 0 no fans work during defrost F3 1 yes fans do not work during defrost Please remember that during the dripping waiting time in the case of network defrost if featured the fans are always off Parameter can be transferred via LAN from the Master to its connected Slaves Def F3 1 evaporator fans off during defrost F4 configuration of the fan relay as an auxiliary relay This parameter allows the fan relay to be configured as an auxiliary local or network allowing the fourth relay to be used as an alarm relay Hl 1 or H1 2 If F4 1 or F4 2 the interventions normally performed on the 4th relay are re routed to the fan relay which acts as an auxiliary relay If F4 1 the fan relay can only be managed locally if F4 2 the fan relay may be commanded via LAN for example by pressing the AUX button on a Master unit Parameter can be transferred via LAN from the Master to its connected Slaves Def F4 0 Fd fans off during post dripping The fans after the defrost can be stopped for a further period in minutes
27. 6 c patamieters Tor compressor Management AAA iaia ee 24 IE deParameters tor derro mana remedios AS A aaa ia 30 11 8 AS parameters Or alarm con Oli suc crsint LS DEAR EAS AAA ARA a lara 33 11 9 Digital inputs and description of the interface commands for the supervisor 34 11 10 E parametets tor controllino the evaporator TAS ui a a ana ah 38 11 11 HS OL MCL SETAS ita AA AAA AR RISA 39 12 Operating states ofthe UNES a uU ERINNERN 41 1231 gt Sequence man phase lille lai 41 13 AlArmS iia ia iia 42 13 Decco INCOM CCE opera OM ii od ba da conoces A 42 13 2 Description of the signals flashing on the display of the MPX 42 14 Eroubleshootins allinea 44 15 Technical ispeciicabnonsoa erneuern aaa 45 lol Technical EOS A A A iii 45 15 2 Temper turs Resistanee ratios for NTC Kermistots o Saa 46 19 5 VIEW OLLE TIS UCI ren satis Go ee oll ecco east 47 16 WIRING DIAGRAMS 2 22 ana A E 48 16 1 MEN ST Te TCI VIEW li dace cneucaaween ture dapyayiaee Renee 48 17 Summary OF para Met sa bellina 49 General Features The multiplexed Master Slave units belong to the MPX Series for refrigeration made up of microprocessor controlled electronic controllers with LED display specifically designed for the management of refrigeration units In this particular case the refrigeration units may be stand alone type or grouped together as multiplexed cabinets 1 Main features of the multiplexed
28. Available on all models Def 0 regulation using virtual probe rt temperature monitoring time once temperature monitoring has been enabled the time in hours from the start of the monitoring period is saved for this parameter Available on all models Def rH maximum temperature measured in time rt once temperature monitoring has been enabled the maximum temperature measured from the start of the monitoring period is saved for this parameter Available on all models Def rL minimum temperature measured in time rt once temperature monitoring has been enabled the minimum temperature measured from the start of the monitoring period is saved for this parameter Available on all models Def 11 6 c parameters for compressor management c COMPRESSOR PARAMETERS Type Min Max UOM Def ToLAN New CU Compressor start delay when the instrument is turned ON C 0 15 min 0 cl Minimum time between two successive compressor starts C 0 15 min 0 c2 Minimum compressor off time 0 15 min 0 c3 Minimum compressor on time C 0 15 min 0 c4 Relay safety 0 compressor always OFF C 0 100 min 0 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 27 c0 Delay in switching on the compressor and fans if controlled after switching on the instrument From when power is supplied to the control
29. ER FUNCTIONS eee HO RS485 serial address only for Master with RS485 C 0 199 1 Hl Configuration of fourth relay auxiliary and or alarm C 0 3 _DEFROST TIMES only for Master with RTC eee hl Hour of the first defrost time able to be set C 0 24 hours 24 ml Minute of the first defrost time able to be set C 0 50 min 0 h8 Hour of the eighth defrost time able a be set C 0 24 hous 24 ms Minute of the eighth defrost time able to be set C 0 50 min 0 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 11 6 Programming The microprocessor in the MPX instruments allows the configuration of the functions of the controller according to the application requirements To simplify this operation we have divided the operating parameters into two main groups e frequently used parameters indicated as F parameters in the tables below e configuration parameters C protected by a code or password to prevent unauthorised access to the data The parameters are modifiable as follows e using the keypad on the front panel e via LAN download the parameters from the Master to its connected Slaves e if the relative options are available from the RS485 serial network using the Master as a protocol converter the parameters can be read from Supervisory system and written to Slave units which are not physically connected to the RS485 serial
30. Master Slave units Power supply 12V alternating current Soft touch keypad The aesthetics of the MPX Series have been designed to blend harmoniously with the new lines of the refrigeration units In the MPX Series special attention has been paid to the ergonomic aspect In this way the modification of parameters and the setting of the more common functions can be done by simply pressing only one button at a time simplifying the use of the instruments New rear connections The rear connectors have been redesigned to make the instrument effectively a plug amp play unit LED Display The LED display shows two and half digits with a range from 55 95 C the temperature value appears with one decimal point which can be omitted via the setting of the relative parameter in the range from 19 9 to 19 9 C In addition depending on the model up to 4 LEDs are available for signalling the active actuators Buzzer All controls come complete with an alarm buzzer upon request LAN The multiplexed Master Slave units can operate both in Stand Alone mode and connected together in a network for the management of multiplexed refrigeration cabinets The unit configured as the Master in this case synchronises the defrost of all the slave cabinets The individual units on start up can be configured either as Master or as Slave The LAN is set up using a half duplex two lead serial interface which allows up to 6 units to be connected togeth
31. Q 3 09 KQ 70 C 12 17 kO 2 22 KQ 2 28 kO 80 C 1 62 kO 1 66 KQ 1 71 kQ 190 C 11 22 KQ 1 26 KQ 1 30 KQ Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 46 15 3 View of the instrument GO f 71 x 29mm Y WHHL Dimensions of the MPX in mm A 75 B 34 C 66 D 75 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 47 16 WIRING DIAGRAMS Master Slave connection wiring diagram SER 485 Y Insulating Transformer transformer pLAN Example of wiring for serial connection of the instruments Main mains power supply TRF transformer INS TRF insulating transformer earth SER multiple connection to the controller system 16 1 MPX contact rear view Label of connections for the IRMPX10000 model slave with 4 relays TIERE EHET O O CI FIIIT cP FAN KEERT EEH sie 000LXdMNHI Larix 320000500 O Q CMP FAN A LL EROI LLAN L RS 485 RIP 0ONNXdNHI Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 48 17 Summary of parameters PARAMETER Type Min Max vom Def ra Lan2 New Pa PASSWORD PARAMETERS Leo io z LOGPASSWD______ ec 0 19 a powntoappassworp ft oe PROBE PARAMETERS Type Min Max UOM Def To LAN New St Temperature set point
32. SE THE REMOTE CONTROL 7 4 2 Buttons for the remote control of the instrument s keypad The PRG A v SEL buttons reproduce the functions of the controller s local keypad on the remote control The main functions are summarised below for convenience SEL displays the value of the selected parameter and accesses the set point A 1 passes from one parameter to the next 2 increases the data on the display when setting the value of the parameters 3 scrolls the alarm log 4 accesses the network auxiliary relay T 1 passes from one parameter to the previous 2 decreases the data on the display when setting the value of the parameters 3 starts a local defrost 4 scrolls the alarm log PRG 1 pressed for 5 sec accesses the type F parameters 2 permanently saves the values of the modified parameters and exits the parameter programming mode 3 silences the buzzer if activated when the controller is not in parameter programming mode Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 15 7 5 The PSW button and the command buttons 7 5 1 The PSW button enter the system password from the remote control Pressing the PSW button for at least 5 seconds accesses the enter prompt for the system password see using the local keypad and Table of parameters e 22 C parameters e 44 read log e 66 start download procedure To enter a password from the remote control proceed as follows e press PSW for at leas
33. Supervisory unit Activation of alarm signals and associated operating mode Duty Setting from the Supervisory system Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 21 11 DESCRIPTION OF THE CONFIGURATION PARAMETERS 11 1 Configuration parameters As already mentioned see chapter on how to modify the operating parameters there are two types of parameter parameters used frequently indicated by F in the following tables configuration parameters type C which are protected by a password to prevent unwanted modification 11 2 Parameter categories Besides being divided into TYPES the parameters are grouped into logical categories labelled by letters indicating their function The categories and their identifying letters are given below Category Description Flashing 00 Does not indicate a category but merely that a password must be entered in order to access the configuration parameters or the alarm log parameters corresponding to temperature probe r parameters corresponding to temperature control C parameters corresponding to compressor management d parameters corresponding to defrost management A parameters corresponding to alarm management F parameters corresponding to evaporator fan management H general parameter configuration 11 3 The password FLASHING PASSWORD This is a protective device that intentionally complicates access to Confi
34. The default end defrost timeout is 30 minutes The network defrost which is set to occur cyclically every 8 hours may also be started manually pressing the DEF SEL buttons for 5 seconds or at set times if the RTC is present The Master may control and manage the network defrost cyclically manually by time or via its digital contact even in operating conditions under which it cannot perform a local defrost 10 2 Remote alarm signals The unit configured as the Master in a multiplexed network may signal remote alarms present in the slave units if this is enabled by setting the relative configuration parameter parameter Ar 1 All Master units are set to do this as default If the Master detects that a Slave unit is in alarm status regulation probe error defrost probe error high low temperature error the display shows the signal nX alternating with the display of the temperature where X 1 2 3 5 the sub network address of the Slave in question Following this event the alarm relay of the Master is activated if configured to do so parameter Hl 1 or parameter Hl 2 This allows the use of just one alarm relay that of the Master in the multiplexed sub network The nX signal on A the Master may be inhibited for one minute by pressing amp J for 1 second 10 3 The network auxiliary relay By default the fourth relay of an MPX unit is configured as the network auxiliary In a mul
35. ___ _ PROBLEM CAUSE CHECK le lt gt wx gt x gt H A _ _ _ _ _____ gt ececcceoco oc e ccce ecc c i ywy u Rx xKX RQOu9R m u k _ _ mu _U __ lt c compressor does not start compressor delay in progress parameters c0 cl and c2 e power on e compressor LED flashing temperature is outside set limits but no alarm alarm delay in progress check Ad signalled and the buzzer if fitted does not sound the AL or Ad alarm signalled Multi function Multi function input generates alarm as power goes check connection of input and input without in fact being active on whether it is off in normal IO Pera n the alarm connected to Multi function input is alarm delay operating or parameter programming see whether A4 A5 1 or not signalled error A4 A5 2 if A4 A5 1 check status of digital input if A4 A5 2 check A7 e contact open e interval between defrosts dI 0 in this case the e defrost LED off defrost 1s not activated e no defrost time set defrost not activated e defrost cycle too short dP parameter dP and dl manual defrost not activated and defrost LED compressor protection delays in progress parameter d9 select d9 1 flashing high temperature alarm given after defrost alarm delay after defrost too short or alarm parameter d8 and AH and Ad threshold too low e fan power on e if FO 1 fans under fa
36. able on all models Def c1 0 no minimum time is set between two start ups compressore compressor C1 c2 Minimum compressor OFF time This sets the minimum time in minutes for which the compressor may remain inactive The compressor will not be started if the minimum time selected has not elapsed c2 This parameter is useful for equalising pressure after switch off in the case of installations with hermetic and capillary compressors N She ON een I 09 insertion request i y i GE Parameter can be transferred via LAN from the Master to its connected een Sip Slaves Available on all models SRE Def c2 0 no minimum OFF time is set compressore compressor c3 Minimum compressor ON time This sets the shortest period for which the compressor may operate The compressor will not be switched off if it has not been on for a time equivalent to the minimum selected A ne es per ON FREE a 1 N richiesta inserimento l insertion request NN A T EREA st OFF ON compressore compressor Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def c3 0 no minimum ON time is set Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 28 c4 Duty setting or safety relay If the regulation error alarm occurs that is probes S1 and or S3 are short circuited or disconnected this parameter ensures the operation of the compressor un
37. allation suffers from frequent blackouts If there is a power failure the internal clock that calculates the intervals between two defrosts will be set to zero In extreme cases if the frequency of power failures is greater than the frequency of defrosts for example a power failure every 8 hours with a defrost interval of 10 hours the controller would never command a defrost In such a situation it is better to activate defrost at power on especially if defrost is set by temperature evaporator probe so as to avoid unnecessary defrosts or at least reduce the duration of such In the case of multi unit installations if defrost at power on is chosen when power is restored all the units may start defrosting at the same time and therefore the power supply will be overloaded To avoid this use parameter d5 which allows an initial delay in defrost this delay obviously has to set to a different value for each unit Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d4 0 the instrument does not perform a defrost on start up d5 Delay of defrost at power on or start of Multi function This parameter sets the time that is to elapse between the controller power on and the start of defrost When a digital input is used either to start a defrost see parameter A4 A5 A8 3 or to convey a defrost command from an external contact see parameter A4 A5 A8 4 this parameter represents the dela
38. and configuration of the units selected PHASE normal defrost await dripping post dripping resumption operation __drippin normalop ACTIVITY unit s evaporator the defrost compressor and fans are off to temperature temperature defrosted as relay is off evaporator fans allow the control controlled required while the are off in order evaporator to resumed controller to help drainage reach operating awaits the of water after temperature other units to defrost end defrost The sequence progresses from left to right Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 41 13 Alarms 13 1 Defective or incorrect operation The units in the MPX range are able to signal most incorrect operations automatically When a malfunction occurs the microprocessor initiates the following actions e the malfunction is signalled on the display by an appropriate alarm code More specifically the display shows the alarm code and the temperature read by the probe alternating in sequence e if more than one alarm occurs at the same time these are signalled in sequence alternating with the temperature e for some alarms an internal buzzer if fitted emits an audible warning e for these alarms the AUX relay where fitted and if configured as an alarm output will be activated PRG Pressing the button silences the buzzer and de energises the relay for 10 min while the alarm code only disappears when the correspondi
39. ature probes with NTC thermistors normally featured on the MPX controllers change resistance as the temperature changes Following is a description of the resistance values corresponding to various temperatures In the case of malfunction or inaccurate control users can check the operation of the probes as follows e with a standard thermometer to determine the temperature measured by the probe e with an ohmmeter measure the resistance at the head of the probe and compare it with the values in the table In view of the variation shown by thermistors three resistance values are given in the table for each temperature e Rstd the typical resistance value at the temperature indicated e Rmin is the minimum value e Rmax is the maximum value For the sake of simplicity the values corresponding to only a limited number of temperatures are given Intermediate values can be determined by interpolation Temperature Resistance ratios for the Carel NTC temperature probe Temperature Rmin Rstd Rmax 40 C 181 10 KQ 188 40 kQ 195 90 KQ 30 C 107 50 kQ 111 30 kQ 115 10 KQ 20 C ss 65 80 KO 67 74 kO 69 74 kO 100 4143k0 42 25 KQ 43 50 KQ oe o 26 74 kO 27 28 KQ 27 83 KO 10 C 17 67 KQ 17 95 KQ 18 24 kO 20c 1195k0 12 09 KQ 12 23 KQ 30 C 8 21 kO 8 31 kO 8 41 KQ 40 C 5 73 kO 5 82 kO 5 92 kO 150 C 4 08 KQ 4 16 kO 4 24 KQ 60 C 2 95 KO 3 02 k
40. been pre wired the controllers can be easily replaced without having to repeat the pre installation operation described above Installation should be avoided in the following circumstances Le 2 3 4 A 6 Relative humidity greater than 85 Heavy vibration or shocks Exposure to continuous water sprays Exposure to corrosive or pollutant gases e g sulphur or ammonia fumes saline mist smoke so as to avoid corrosion and oxidisation Strong magnetic and or radio interference therefore installation of the unit near transmitter aerials should be avoided Exposure of controls to direct solar radiation and other climatic elements The following warnings must be heeded when making the connections during the pre installation of the controllers 1 2 Connecting a power supply of the incorrect voltage can seriously damage the system So as to avoid any possible electro magnetic interference separate as far as possible the signal leads from the probes and the digital inputs from the induction and power leads Do not place power leads and probe leads in the same channels Furthermore avoid placing probe leads in the immediate vicinity of powered components thermo magnetic contacts or others Keep the probe leads as short as possible and avoid sharing their routes with power leads As defrost probes use only guaranteed IP67 sensors place the probes with the bulb in an upright position to assist the drainage of any condensati
41. bes Alternatively the fans can work constantly with the possibility of switching them off when the compressor is off see parameter F2 during defrost see parameter F3 during a dripping period see parameter dd and for a further post dripping period see parameter F1 Values allowed for this parameter are FO 0 in this case the fans are not subject to fan control but to parameters F2 F3 and Fd FO 1 the fans are subject to fan control see parameter F1 It should be remembered that if a dripping period has been provided for dd not 0 the fans will be stopped in any case Parameter can be transferred via LAN from the Master to its connected Slaves Def F0 0 that is not subject to fan control F1 Absolute Set Point Fan stop temperature operative only when F0 1 The fans are activated when the temperature on the evaporator is less than F1 AO The fans are turned off if the temperature on the evaporator is above the absolute set point Fl Parameter can be transferred via LAN from the Master to its connected Slaves Def F1 5 F2 STOP fans when compressor idle parameter operative only when F0 0 Selects whether the fans should operate continuously except F3 dd and Fd or only when the compressor is working If FO 1 the fans are managed by the fan control and therefore are working or off according to the difference between evaporator and ambient temperatures irrespective of the state of the compressor F2
42. cal defrosts The parameter dI manages the so called cyclical defrosts for of each individual Master Slave unit These are controlled by a timer built into the instrument with a set value in hours minutes see parameter dC saved for parameter dT This timer is reset after each attempted defrost including non cyclical ones If the time dT is set to 0 dI 0 no cyclical defrosts are performed Cyclical defrosts may be local that is performed independently on the individual units or network after the time dl on a Master with connected Slaves the Master will manage a network defrost During the defrost the temperature alarms are disabled Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 8 hours 1 Only the new repeaters with updated FW allow the display of the codes besides the temperature the others if d6 2 display only one fixed temperature Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 30 dt End defrost temperature set point This parameter allows the setting of the temperature of the evaporator at which the defrost is ended the temperature of the evaporator is measured by the defrost probe probe 2 If at the start of a defrost dO 0 the temperature measured by the defrost probe is greater than the set end defrost temperature the unit goes directly to the dripping phase See further on network defrost In the case of malfunct
43. d For Stand Alone Master units set the value of A9 to 0 Def A9 1 Available on all models if configured as Master Some important warnings For correct management of the functions associated to the digital inputs the values of A4 A5 A8 must be different from one another or else null That is when A4 AS A8 have values other than zero the following must be true A44A5 A4 A8 A54A8 By default A4 A5 A8 are zero and thus the corresponding inputs are not associated to any special functions Note The configuration of a controller s digital inputs is carried out only during installation It is good practice after having configured the controller s digital inputs to carry out a manual reset pressing the PRG SEL and UP buttons for 5 seconds of the controller In the case of a multiplexed network slaved using the virtual digital input of the Master to a supervisory system that controls for example the synchronisation of the defrosts the day night set point etc the propagation of the second digital input of the Master must be disabled setting A9 O from the supervisory system before using the command interface that the Master offers the Supervisor This operation ensures the correct response of the multiplexed network to the commands from the supervisory system and the synchronisation of the controllers to the same commands Failure to heed this warning may lead to anomalies in the operation of the controllers both in stand alone sy
44. deactivates the continuous cycle on start up displays the identification code of the software version loaded on the controller preceded by a graphic symbol if pressed together with button 9 on Master units starts a network defrost on the entire multiplexed island on all units if pressed during the start up of the controller resets the alarm log Note to enable disable the continuous cycle press button 10 and button I and hold for 5 seconds Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 8 5 Configuration of the controllers The multiplexed units are supplied ready for use They have in fact been programmed using a default configuration so as to satisfy the more common requirements Programming is performed by assigning all the parameters the more frequently required value These values are listed in the table of parameters at the end of the manual If the user wants to maximise the operation of the controllers or has other specific regulation needs the value of the operating parameters can be modified The following notes indicate the default values and the parameters that are more frequently modified before starting to operate the unit 5 1 Configuration of the controllers as Master or Slave PRG on start up of the unit press the and buttons together for 5 seconds e the display shows the configuration parameter code In SEL e press the button to modify the value 0 Slave unit 1 Master u
45. defined by the value of Fd This is useful in allowing the evaporator to return to the correct temperature after the defrost thus avoiding forcing hot air into the refrigeration unit In the case of fan controller management Fd does not need to be selected in that the fan controller starts the fans only when the evaporator has reached the correct temperature If fan control is active FO 1 on assigning Fd a value other than zero the fans stay off for a period equal to the value of Fd irrespective of the temperature of the evaporator Parameter can be transferred via LAN from the Master to its connected Slaves Def Fd 1 NOTE Please remember that during the dripping time dd and post dripping time Fd if set to a value other than zero the fans will in any case stay off irrespective of the values assigned to parameters FO F2 and F3 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 38 11 11 H other settings H___ OTHER PRE SETTINGS Type Min Max UOM Def To LAN New HO Serial address only for the network Master C 0 199 0 H1 Relay 4 selection C 0 3 flag 3 0 auxiliary output 1 alarm relay normally open closed in alarm 2 alarm relay normally closed open in alarm 3 auxiliary relay Master serves the Slaves the action of the Master relay is transmitted via LAN to the Slaves the 4 relay of which is configured with H1 3 not managed HO Serial
46. e not compatible with the unit IA FLASHING Immediate multi function digital input alarm e Check the multi function input and parameters A4 and AS Ad FLASHING Delayed multi function digital input alarm e Check the multi function input and parameters A4 A5 and A7 LO FLASHING Low temperature alarm The probe has measured a temperature further below the set value than the value set for parameter AL e Check parameters AL Ad and AO The alarm will cease as soon as the temperature returns within the set limits see parameter AL Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 42 HI FLASHING High temperature alarm The probe has measured a temperature further above the set value than the value set for parameter AH e Check parameters AH Ad and AO e The alarm will cease as soon as the temperature returns within the set limits see parameter AH EA EB DISPLAYED DURING OPERATION OR WHEN SWITCHING ON Data acquisition error e See the section on Procedure for re configuring the controller with the default parameters Ed FLASHING The last defrost has stopped due to the expiry of the maximum time rather than the end defrost set temperature being reached e Check parameters dt dP and d4 e Check the effectiveness of the defrost e If the next defrost ends due to temperature the signal will automatically disappear dF FLASHING Defrost in progress e This is not an alarm signal but rather an indication that the
47. ed during defrost and continuous cycle operation Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def Ad 120 120 minutes delay in signalling temperature alarms 11 9 Digital inputs and description of the interface commands for the supervisor A4 AS AS Configuration of the Multi function digital inputs The instruments in the MPX Series are fitted with three digital inputs which can be configured using parameters A4 A5 A8 Parameters A4 and AS configure the digital inputs DINI and DIN2 which are wired during pre installation All units both Master and Slave can also manage using an electrical analogy a third digital input known as the virtual input This input in the unit Slave is physically supported by the terminals in the LAN while for the units configured as Masters and fitted with RS 485 serial connection it is supported by the signal terminals and of the RS485 In the case of a multiplexed network Master Slave the virtual digital inputs for all the instruments are wired in parallel The virtual inputs of the Slave are served by the Master and that of the Master is served by the supervisory system The physical input DIN2 of the Master may also be wired in parallel to the virtual inputs by setting on the Master unit the parameter A9 In this case the closing opening of the physical contact DIN2 on the Master will be propagated
48. ef To LAN New parameter accessible only on the Master units 0 LAN not present SA Slave address in the LAN C 0 5 S 0 Sn Number of Slaves C 0 5 0 parameter accessible only on the Slave units 0 LAN not present In Configuration parameter of the single unit as Master IN4 0 1 In 1 or Slave In 0 RTC PARAMETERS only on Master unit Type Min Max UOM Def To LAN New hh Current hour F 0 23 hours mm Current minute F 0 59 min hl Hour of the first defrost C 0 23 hours 24 ml Minute of hour h1 on the current day when a defrost starts C 0 50 min 0 h2 Hour of the second defrost C 0 23 hours 24 m2 Minute of hour h2 on the current day when a defrost starts C 0 50 min 0 lr ri as el E a E en ey E HA CI h8 Hour of the eighth defrost c 0 23 hours 24 m8 Minute of hour h8 on the current day when a defrost starts 0 50 min 0 4 The IN parameters are accessible only when starting the machine by pressing the PRG amp SEL buttons during the POWER ON phase during which the 3 hyphens and a code identifying the unit as Master uM or slave u 1 5 address of the slave in the LAN are displayed Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 51 Note Note Note CARE Technology amp Evolution CAREL srl
49. en probe 1 and probe 3 C 0 100 0 O probe 1 100 probe 3 5 rosis 1 flag e 1 6 Decimal point enabling 0 No 1 Yes 1c o hag 0 1 Display on main display and repeater 0 repeater not present 1 3rd probe reading only on repeater C 0 3 flag 0 2 3rd probe reading also on main display 3 virtual probe reading on the main display and defrost probe on ee es ees SAS 1 8 3rd probe calibration c 20 20 ecrr 00 9 Defrost with probe 3 C 0 1 flag 0 1 the defrost in temperature ends when the temperature measured __ by probe 3 is gt the temperature set for parameter d d Defrost probe calibration C 20 20 CE 0 0 Short descriptive note about probes with NTC and PTC type thermistors Units in the MPX series are designed to work with Carel NTC temperature probes or probes using thermistors with a negative characteristic NTC stands for Negative Temperature Coefficient This type of thermistor modifies an electrical parameter 1ts own resistance in inverse proportion to any change in temperature that is the resistance falls as the temperature rises and vice versa Other types of thermistor are on the market PTC thermistors are widely available with a resistance of 985 Ohms at 25C PTC stands for Positive Temperature Coefficient by contrast with the NTC these increase
50. er 1 Master 5 Slave Alarm log Each individual unit features a log with a maximum of 9 alarms each new alarm is recorded in the log where it can be consulted by the user RTC Some models are fitted with RTC battery backup and allow the management of the defrosts at pre set times Up to 8 defrost times can be set during a day 24 hours In the models where RTC is not featured the defrosts can in any case be performed cyclically or manually Third probe Used for measuring the temperature in the hot point of the refrigerated cabinet this can be displayed as a frequent parameter and corresponds to new parameter dA Probe 3 on a stand alone instrument may also be used to manage the defrost on a second evaporator Duty setting A completely new function allows the compressor to run even if the regulation probe is damaged In the case of a short circuit or open circuit probe the compressor is instructed to start on the basis of time intervals minutes selected using the duty setting parameter c4 and to turn OFF every 15 minutes fixed time interval Multifunction input The multiplexed units are fitted with three digital inputs which can be configured by setting parameters A4 AS and AS respectively Two of these are physical that is relate to an electrical contact parameters A4 A5 while one is related to the LAN parameter A8 for the Slave models or to the RS 485 serial interface for the Master models fitted
51. ered by the MPX family instruments and its local network structure 1 Br eae Remote programming of the individual instrument direct access to the parameters and or by entering password 22 on the remote control Remote programming of a multiplex network using the Master unit only starting the download from the remote control Remote setting of the defrost times only for models with RTC and configured as Master Remote setting of the current hour and minute current only for models with RTC and configured as Master Direct access by simply pressing one button to the alarm logs Direct remote access to the local auxiliary relay Direct remote access to the network auxiliary relay using the remote control on the Master unit Remote silencing of the buzzer switching off the corresponding local alarm relay Remote starting of manual defrosts local and or network In implementing the user interface for the MPX remote control the aim has been to provide harmonious expansion that is to offer the user all the functions available on the local keypad as well as some extra options direct access to the parameters the defrost times the alarm log separate management of the network relay and local relay that the local user interface does not have The available functions are accompanied by the following system security features aimed at protecting the user No control configuration parameters can be modified by accident from the
52. f protection of the panel the instrument is mounted on Fastening the unit The unit is fastened using a compact quick fit plastic fastening bracket This allows the instrument to be mounted on the panel without requiring the use of screws Test in circuit The instruments in the MPX series are the result of the most advanced SMD technology All controls are built using high quality components Quality control includes a rigorous TEST IN CIRCUIT on each single component to ensure that the controller is completely reliable NTC probe The MPX instruments have been designed to be connected to Carel NTC probes as these offer greater precision than other probe types Watchdog A special device that protects the microprocessor of the controller even in the event of strong electromagnetic noise In the case of abnormal conditions the watchdog restores the initial operating status of the unit Immunity against noise The devices conform to EU standards on electromagnetic compatibility CE amp ISO9001 Approvals The quality and safety of the MPX series are assured by the ISO 9001 design and production certification as well as the CE Mark Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 4 2 Models in the MPX series The models in the MPX series have different codes according to their features The table below lists the various codes and the corresponding options that characterise each model OPTIONS MODEL CODE
53. f the alarm condition automatically cancels the corresponding signal The re occurrence of the alarm condition returns the instrument to monitor the condition itself It should be remembered that the low temperature alarm is also used in the continuous cycle see relative section In fact if the temperature falls to the level set for the alarm the continuous cycle is automatically stopped even if the set period of time has not elapsed The stopping of the cycle does not lead to any alarm signal Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def AL 4 Ad Temperature alarm delay Indicates the delay in minutes before a registered deviation is signalled The measuring of a temperature alarm condition leads to the monitoring of the condition itself for a time equal to Ad minutes after which if the condition persists the alarm is signalled If there is an end to the alarm condition within the period Ad no alarm is signalled Setting a delay in signalling temperature alarms can help to avoid false alarms due to interference with the probe or situations lasting only a limited time such as briefly opening the door of a store room Alarm delays do not affect two particular functions defrost and continuous cycle To delay any temperature alarms after these functions parameters d8 for defrost and c6 for continuous cycle must be set Remember that temperature alarms are not generat
54. f the fan is controlled by the fan controller see category F the fans will be shut down ATTENTION the Door Switch algorithm can be activated on units where A8 5 by a command from the supervisory system if the latter exploits the functions supplied by the Master or by the opening of the second digital input DIN2 on the Master if on the Master A9 1 A4 A5 A8 6 control off by digital contact Contact closed On contact open Off In Off status the controller displays the temperature alternating with the symbol _ _ It only displays the temperature and does not control the compressor or the fans which are off nor monitors for any alarms In the case where the temperature displayed is outside the limits of the instrument the code or is displayed out of range The instrument ignores requests for defrost continuous cycle and Duty Setting If the instrument in Off status is a Master with a sub network of Slaves this may still manage a network defrost even using another digital contact and signal any alarms on remote units ATTENTION machines where A8 6 can be placed in Off status by a command from the supervisory system if the latter exploits the functions supplied by the Master or by the opening of the second digital input DIN2 on the Master if on the Master A9 1 and if the machine is a Slave A4 AS A8 7 automatic variation of the set point by digital contact Contact closed night time set point
55. guration parameters in order to prevent accidental changes or any that might be made by unauthorised persons Type C parameters are in fact those that alter the controller s configuration Once the configuration parameters have been entered via the use of the password the system also allows the user to alter type F parameters as required The password request flashing 00 appears when the two buttons and Fl pressed at the same time Access to type C parameters is gained as follows A e press or pe to enter 22 or the correct password SEL confirm using S the code of the first modifiable parameter is displayed that is C enter 44 as the password if you wish to access the alarm log enter 66 as the password on a Master unit if you wish to download the parameters from the Master to its Slaves for the configuration of a multiplexed island The following paragraphs describe all the parameters In addition the default value Def that is the value set in the factory will also be indicated Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 22 11 4 parameters for the management of the temperature probes PROBE PARAMETER Type Min Max UOM Def To LAN New St Temperature set point rl r2 CE 10 0 C Regulation probe calibration F 20 20 C F 0 0 1 2 Measurement stability je ts 1 pp 3 Probereadimgrate ts 1 4 Virtual probe betwe
56. hich the operation of configuration via LAN failed 10 5 Functions available to the RS485 serial supervisory system The MPX Series controls can easily be integrated into large supervisory networks by using the MPX models fitted with a built in RS485 serial interface These models must be configured as the Master the units to integrated must be configured as Slaves with a maximum of 5 for each Master which has the function of interface to the RS485 network of the supervisory system The structure of the software in the MPX provides the supervisory system a number of powerful monitoring and control functions that can be performed on the remote workstation PC e Monitoring of the temperature measured by the three probes on each controller e Monitoring of the status of the digital inputs of each instrument e Monitoring of the alarms on all the controllers including the Slaves which are not directly connected to the RS485 serial communication channel e Reading and modification of the value of the parameters of each controller including the Slaves which are not directly connected to the RS485 serial communication channel Remote control of the controllers actuators light relay for an entire locked out multiplexed island Remote control of the light relays for each individual MPX unit Network defrost for a multiplexed island by Supervisory units Defrost of any remote unit belonging to a multiplexed island Switching OFF of any MPX by a
57. impulse from timer to start defrost the minimum duration must be 0 5 seconds dP 1 maximum duration of defrost unit 1 d5 2 external contact s defrost delay for unit 2 This must be grater than dP 1 if two units are not to be defrosted at the same time Similarly for d5 3 and dP 3 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 35 A4 A5 A8 5 Door Switch Setting A4 A5 A8 5 controls the switch on the store room door When the switch is opened the compressor and the fans are switched off and the lights are switched on if at least one of the two fan or AUX relays is configured as an auxiliary and is used as a light relay When the door is closed as well as the Multifunction contact the unit resumes the previous operation delaying any temperature alarm by a number of hours equivalent to the value of d8 If the door stays open for a time longer than d the display begins to flash and the controller returns to normal operation the same as before the door was opened Specifically e if the controller was in Duty Setting it returns to Duty Setting mode e if the controller was in continuous cycle it returns to continuous cycle and the maximum time for the continuous cycle is extended by the length of time the door was opened e if the controller was in defrost it remains in defrost On re starting the compressor however any protective time constraints selected will be respected see c parameters Note even i
58. ion 12 How to exit the procedure How to save the new set values PRG e Press to save the new values and exit the procedure PRG PRG Important press to save the new values In the case of power failure before has been pressed all changes will be lost 6 3 Exiting the programming procedure To exit the programming procedure without saving the changes do not press any key for at least 60 seconds TIME OUT The instrument will return to its normal operating mode 6 4 Manual reboot of the controllers m The controllers can be manually rebooted at any time without disconnecting the power This is done by pressing the ls and buttons together and holding them for 5 seconds This procedure may be useful if operating anomalies occur during the configuration installation of the instrument after having changed some important configuration parameters such as the configuration of the digital inputs Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 13 7 Programming by remote control AVAILABLE FOR THE FOLLOWING MODELS IRMPX0A000 IRMPX1A000 IRMPXMA000 7 1 Remote control layout loc def LAN def econ ec off Remote local interface buttons PRG SEL KEY_UP KEY DOWN Numeric keypad 1 Function buttons History PSW ESC ENABLE 7 2 Introduction The remote control for the IRMPX series has been designed to provide the user in the palm of their hand all the functions off
59. ion of the defrost probe the controller will effect a defrost lasting for a period equivalent to the value set for dP Thus if the end defrost set point can not be reached the defrost will be interrupted after a maximum period equivalent to the value in minutes of dP and the Ed error will be displayed if r3 1 and will persist until a defrost is correctly performed that is ends at the set temperature In the case where probe S3 is used as a defrost probe on a second evaporator the temperature defrost ends when both probes S2 and S3 measure a temperature above or equal to that set in parameter dt Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 4 dP Maximum defrost duration Determines the duration of the defrost in minutes or seconds see parameter dC for timed defrost In the case where during a temperature defrost the end defrost temperature is not reached within the time dP dP represents the maximum duration of the defrost Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 30 minutes d4 Defrost at power ON Activates a defrost when the unit is switched on Possible values are U no defrost on start up of the units 1 defrost is effected on start up Commanding a defrost when the unit is switched on can be useful in certain particular situations for example if the inst
60. is 1 3 Probe reading speed Establishes the maximum variation in the measurement of the temperature for each complete analogue input acquisition cycle Small values of this parameter restrict the variation in temperature within the short period and thus reduce the unit s susceptibility to erratic impulses Note When modifying both this parameter and the previous operate in a consistent manner that is if 2 is increased 3 should be left unchanged or reduced Vice versa if 2 is decreased Available on all models Default value is 1 4 Virtual probe Defines a fictitious probe which does not exist physically used for normal regulation operations This parameter determines the welghted average used to calculate the value of the virtual regulation probe based on the readings from the ambient probe S1 and probe S3 cabinet hot point The formula is the following 100 P Heg 4 xS3 100 With a value of O the virtual probe coincides with the ambient probe with a value of 100 the virtual probe coincides with probe 3 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 virtual probe 5 Selection of F or C Defines the unit of measurement O for working in degrees Celsius 1 for working in degrees Fahrenheit When passing from one unit to another the unit of measure for the set point and the regulator differentia
61. it the START procedure and will ignore the pressing of any buttons on the remote control other than the ENABLE button 7 6 4 MODIFYING THE MAIN PARAMETERS The buttons on the remote control used to modify the parameters buttons labelled with codes allow direct access to all type F parameters frequent for the instrument as well as type C configuration parameters Ad and cc To access one of these proceed as follows e press the button associated to the corresponding parameter e the code of the parameter will blink on the display e pressing the arrow buttons on the remote control scrolls the entire list of F parameters The possibility of scrolling the list of parameters is inhibited for safety reasons for direct access configuration parameters cc Ad and defrost times e press the SEL button on the remote control to display the current value of the parameter e press the arrow buttons to modify the value e press the SEL button to temporarily confirm the value entered e pressing PRG will permanently save the new value e pressing the ESC button will exit the parameter programming mode without saving the changes 7 6 5 Setting the clock only for Master with RTC Press the hh button to set the hours and the mm button to set the minutes Follow the same procedure as above 7 6 6 MODIFYING THE DEFROST TIMES only for Master with RTC Proceed as follows e press hh for hours mm for minutes e press a nu
62. l are also automatically changed Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 operation in degrees Celsius 6 Decimal point Allows the display of temperature with or without tenths of degrees ranging from 19 9 to 19 9 0 data displayed with tenths of degrees 1 data displayed without tenths of degrees Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 decimal point enabled 7 Reading on main display and repeater Allows the selection of the readings on the repeater and the main display 0 repeater not present default value 1 third probe reading on repeater 2 third probe reading also on the main display 3 second probe reading defrost probe on repeater Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 external display not present 8 Calibration of the third probe cabinet hot point The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S3 For example to reduce the temperature by 2 3 degrees 8 must be set to 2 3 The offset may range from 20 to 20 with decimal precision between 19 9 and 19 9 Available on all models Def 0 0 no offset to probe reading Cod 030220191 rel 2 0 dated 25 06 01 preliminary versio
63. larm situation by a delay or by a particular status of the Multifunction input There are however various specific operating states not directly indicated by the displays This can lead to erroneous interpretation of the unit s operating state For convenience the status of the display in such situations is shown below SPECIFIC STATE COMP LED FAN LED DEF LED C CYCLE LED Between defrosts 4 off Awaiting defrost off Defrost requested flashing 1 Defrost in progress on Dripping off off off Post dripping flashing 4 Serious alarm 1 Onlyif the defrost requested is inhibited by digital contact and if the request for defrost comes from the digital input the defrost is performed as soon as the enabling digital contact is closed signifies that the LED may be on off or flashing depending on the other parameters and ambient factors temperature operating set differential etc The general remarks made above on the status of the LEDs should be kept in mind 12 1 Sequence of the main phases For easy reference below is a diagram showing the sequence of all the possible phases in the defrost process It should be remembered that some phases e g dripping or post dripping can be activated or inhibited by an appropriate choice of parameters The type of activators being controlled and the type of control depend on the type
64. ler the start up of the compressor is delayed by a time in minutes equal to the value assigned a this parameter This delay serves to protect the compressor from repeated start ups when there are interruptions to the power supply For example setting c0 6 the compressor will wait 6 minutes before starting from when power is supplied In the case of systems with more than one compressor the parameter c0 may also be used to prevent the simultaneous starts of the units In this case a different value of c0 should be set for each compressor Shen Pei il oor ee ike e Pees A aN ad Har E ae ON Parameter can be transferred via LAN from the Master to its power ONS Bee T orr Connected Slaves ee ne eee on Available on all models Def c0 0 no delay is set for the activation of the compressor following the richiesta intervento h insertion request I opp Start up of the instrument ON compressore compressor cl Minimum time between two compressor starts This sets the minimum time in minutes that must elapse between two starts of the compressor independently of the temperature and of the set point By setting this parameter it is possible to restrict the number of starts per hour For example if the greatest number of starts permitted in an hour is 10 simply set c1 6 richiesta inserimento insertion request l E l Parameter can be transferred via LAN from the Master to its C E ainsi OFF connected Slaves Avail
65. ly one fixed temperature Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 50 FO Fan management C 0 1 flag 0 0 fan always ON except in special cases see parameters F2 F3 Fd 1 fans thermostat controlled in accordance with the absolute set L HOL EL Fl Fan start absolute set point F 40 50 C F 5 0 CNA S S S __ IL F2 Fans OFF with compressor OFF 0 No 1 Yes C 0 1 flag 1 Activeif F0 0 S S S S EE LL IL Fans OFF in defrost 0 No 1 Yes C 0 l flag 1 Activeif F0 0 S S S S _ LO O e Ef F4 FAN relay configuration as AUX relay in this situation the fourth relay can be used as an alarm relay by setting HI 1 or H1 2 C 0 2 flag 0 e 0 the aux relay is the fourth relay 1 the aux relay is the fan relay local relay 2 the aux relay is the fan relay network relay Fa Fanoffinpost drippng CE o 15 mn 1 __ n ormerserrin6ss pe Min max vom Der To LAN New HO Serial address only for the network Master C 0 199 0 Hl Relay 4 selection C 0 3 flag 3 U auxiliary output 1 alarm relay normally open closed in alarm 2 alarm relay normally closed open in alarm 3 auxiliary relay Master serves the Slaves the action of the Master relay is transmitted via LAN to the Slaves the 4 relay of which is configured with Hl 3 Available but not managed LAN PARAMETERS Type Min Max UOM D
66. m Current minute F 0 59 min hl Hour of the first defrost C 0 23 hours 24 ml Minute of hour hl on the current day when a defrost starts C 0 50 10 min 0 h2 Hour of the second defrost E 0 23 hours 24 m2 Minute of hour h2 on the current day when a defrost starts C 0 50 10 min 0 E eg YENDO ree cen JE oe NR ED ine e a E h8 Hour of the eighth defrost c O 23 hours 24 m8 Minute of hour h8 on the current day when a defrost starts C 0 50 10 min 0 The RTC parameters are present on models IRMPXM0000 IRMPXMM000 IRMPXMA000 IRMPXMB000 hh mm current hour and minute These can be set as for the F type parameters Setting the current hour and minute automatically cancels the signalling of an RTC error tC hX mX are respectively the hour and the minute set for the X th defrost If a defrost is required for example at 3 30 in the morning set hX 3 and mX 30 Do E 2 aas To inhibit defrost set hX 24 The parameter mX can only be modified in steps of 10 min Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 40 12 Operating states of the units As indicated above the display LEDs can be in three states e off when the function indicated or the actuator is not operative e on when the function indicated or the actuator is operative e flashing when the function is held up by an a
67. m are e high temperature alarm the temperature measured by the ambient probe is above the set point by a value greater than AH ambient temperature gt set point AH e low temperature alarm the temperature measured by the ambient probe is below the set point by a value greater than AL ambient temperature lt set point AL The default settings are AL 4 and AH 4 and any signalling of the alarm is delayed by 120 minutes Ad 120 The value associated to Ad in fact indicates the number of minutes of delay that the controller must wait before generating a temperature alarm Obviously if during the set delay the temperature conditions return within the set limits that is within the 4 degrees around the set point no alarm is generated NOTE during installation the unit may not reach a temperature within the range of 4 degrees around the set point within the set 120 minute delay and so the temperature alarm will be activated In this case it is suggested to increase the delay by modifying parameter Ad DEFROST PARAMETERS When using the unit to control defrost check the following parameters before starting the unit dI Interval between defrost cycles without RTC or without programmed times Defrost cycles occur periodically depending on the intervals in hours set using the parameter dI When the interval is 0 dl 0 the defrost cycle is never performed unless it is forced via keypad manual defrost via the digital inp
68. meric button from to 8 to select the required hours minutes for the defrost being set e the display will show the fixed code hn mn n 1 8 e press the SEL button on the remote control to display the current value of the parameter e press the arrow buttons to modify it e press the SEL button to temporarily confirm the value entered e pressing PRG will permanently save the new value e pressing the ESC button will exit the parameter programming mode without saving the changes When displaying the code associated to the hours or the minutes of any defrost time pressing a button on the remote control numeric keypad associated to a defrost time other than the one being displayed will access the associated defrost time Example assume parameter h8 m8 is displayed that is the hours minutes associated to the eighth defrost time that can be set Pressing button 2 on the numeric keypad will show the code h m2 associated to the second defrost time that can be set Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 17 8 Re configuring a control with the default parameters Under exceptional conditions high electromagnetic noise levels for example there may be errors when storing data Consequently the unit may not work correctly When the microprocessor identifies an error in the process of storing data one of the following groups of letters will be displayed EA EB E The las
69. n 24 9 defrost with probe 3 This parameter allows a defrost to be carried out using probes S2 and S3 together if set to 1 In this case the temperature defrost ends when the temperature measured by both probes is greater than or equal to that set as the end defrost temperature See parameter dt Probe 3 can therefore be used as a defrost probe on a second evaporator Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 Temperature defrost with probe S2 only one evaporator only d Calibration of the second probe S2 defrost probe The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S2 For example to reduce the temperature by 2 3 degrees 8 must be set to 2 3 The offset may range from 20 to 20 with decimal precision between 19 9 and 19 9 Available on all models Def 0 0 no offset to probe reading A Presence of probes S2 and S3 defrost and hot point The value of this parameter tells the instrument if the defrost probe S2 and or cabinet hot point probe S3 are connected or not The possible values for this parameter are the following 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present 2 defrost probe present and probe 3 absent 3 defrost probe and probe 3 both present Examples D If probe S2 is not present set A
70. n When the door is open the compressor and the fan are turned off 4 start defrost Defrost is activated when the contact closes It can be used for real time defrost Simply If H1 0 or H1 3 or F4 1 or F4 2 the auxiliary relay is activated to turn the light on If the door stays open for a time longer than d8 the display will begin to flash and the controller will restart normal operation compressor and fan ON if required 7 curtain switch Contact closed curtain down If the input is selected as curtain switch when the contact closes the controller modifies the set point adding the value of parameter r4 With r4 3 0 pre programmed value the set is increased by 3 degrees from the value used for the open curtain If the auxiliary output is used for the light switch only for HI 0 or Hl 3 or F4 1 or F4 2 the lowering of the curtain automatically switches off the light while the raising of the curtain switches it on Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 36 A9 Enable the propagation via the LAN of the Master s second digital input This parameter is accessible only for instruments configured as Master It allows parallel connection to the virtual digital input on the connected Slave units of the Master s second physical digital input DIN2 In this way the second digital input of the Master may be propagated or not to the Slaves 1 DIN2 can be propagated U DIN2 can not be propagate
71. n control parameters FO Fl Fd dd e compressor LED flashing e evaporator is warm temperature can be read e fan LED flashing by selecting parameter d e dripping is in progress e a post dripping delay is in progress e if FO 0 parameters FO F2 dd and Fd e F2 1 and compressor off e dripping is in progress e post dripping shut down e fans do not start e compressor and fan delay selected check c0 controller continues to work with old values parameters have not been satisfactorily saved by program parameters again ne correctly pressing C after changing a value or programming the unit has not yet updated the new values the switch off the controller or Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 44 15 Technical specifications 15 1 Technical characteristics Probe type Operating field Precision Storage Operating conditions Power supply Power consumption Front panel index of protection Fastening Connections Classification according to protection against shock Number of automatic cycles for each automatic action Disconnection action type PTI of materials used for insulation Environmental pollution Heat and fire resistance category Software class and structure Safety device Display Light signals Audible signal Inputs multifunction digital inputs Relay outputs all Compressor Defrost Fan Aux alarm output RTC rechargeable backup ba
72. nd dP in minutes 1 dl is expressed in minutes and dP in seconds The parameter dC 1 can be useful for quickly testing the defrost operation with reduced times It is however considered that if defrost requires the activation of the compressor hot gas defrost and the parameter d9 1 there may be a risk of damaging the compressor by too many starts at short intervals The defrost cycle thus becomes the condensate discharge cycle which needs to be started at short intervals minutes and for very brief periods seconds Contact your Carel agent for further information Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def dC 0 that is defrost interval in hours and dP maximum defrost duration in minutes Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 32 11 8 A parameters for alarm control a ALARM PARAMETERS Type Min Max UOM Def To LAN New AO Fan and alarm differential C 0 1 20 C F 2 0 AH High temperature alarm indicates the maximum variation from F 0 199 E 4 the set point AH 0 excludes the high temperature alarm 1 1 o E AL Low temperature alarm indicates the maximum variation from the F 0 199 C F 4 __ set point AL 0 excludes the low temperature alarm y E A4 Digital input no 1 configuration C 0 E 0 AS Digitalimputmo l configuration
73. ng cause is eliminated The alarm codes are listed in the table below ALARM CODE BUZZER and AUX Relay CAUSE MODELS applicable rE active regulation probe error ALL EO inactive ambient probe error S1 ALL El inactive defrost probe error S2 ALL E2 inactive product probe error S3 ALL IA active immediate external alarm ALL if external alarm connected dA active delayed external alarm ALL if external alarm connected LO active low temperature alarm ALL HI active high temperature alarm ALL EA Eb inactive data saving error ALL Ed inactive defrost end by time out ALL dF inactive defrost in progress ALL tC inactive RTC invalid Masters with RTC MA active Lost contact with the Master Slave units u x x 1 5 active Slave x not communicating Master units n x x 1 5 active Slave x in alarm Master units d x x 1 5 inactive Download failed on Slave x Master units 13 2 Description of the signals flashing on the display of the MPX rE FLASHING Regulation probe error e Probe malfunction the probe signal is interrupted or short circuited e Probes not compatible with the instrument EU or El or E2 FLASHING Probe error S1 S2 or S3 respectively e Probe not working because the signal is interrupted or there is a short circuit e Prob
74. nit SEL e press again to temporarily confirm the new value and move onto the display of the parameter code PRG e press the 2 button to save the new value and exit the Master or Slave configuration procedure the unit will perform a software reboot NOTE the controllers are Master or Slave as default depending on the model and its options all the models featuring RTC with battery backup and or built in RS485 interface are set as Master units 5 2 Selecting the principal operating parameters How to set the ambient set point The instrument is configured with a default set point of 10 C If this is not compatible with the required application it can be modified as follows SEL e press the button for one second to display the value of the set point the previously set value will flash e increase or decrease the value of the set point using the 2 and or x buttons until the desired value is displayed SEL e press the button again to confirm the new value How to set the differential regulator hysteresis The instrument is programmed with a differential of 2 degrees as default If this 1s not compatible with the required application it can be modified as follows PRG press the button for more than 5 seconds in case of alarm first silence the buzzer if fitted e the display shows the code of the first modifiable parameter C A e press the button or bd button until the code rd 1s displayed SEL
75. o rl Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 50 r2 Maximum set allowed This parameter establishes the maximum value accepted as a set point Use of this parameter prevents the user from setting a set point greater than the value assigned to r2 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 90 r3 enable signalling of end defrost for timeout enables alarm Ed defrost ended due to timeout U alarm disabled 1 alarm enabled Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 r4 set point variation by digital input automatic set point variation by digital input day night set point The parameter r4 ranges from 20 to 20 degrees with decimal resolution When configured on the closing of a digital input the set point varies by the amount stored in parameter r4 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 3 0 r5 enable temperature monitoring maximum and minimum Enables the monitoring of the max rH and min rL temperatures in the interval rt max 199h r5 Enable min and max temperature monitoring Temperature alarm monitoring HI and LO U None On virtual probe 1 On probe S1 On virtual pr
76. obe 2 On probe S3 only if 7 1 On virtual probe 3 None On probe S3 4 On probe S1 On probe S3 5 On probe S3 only if 7 1 On probe S3 Monitoring begins when r5 is assigned a value greater than or equal to 1 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 26 To inhibit monitoring and or reset the values recorded set r5 to 0 After 199 hours the measuring of the max and min temperatures is halted having reached the maximum monitoring time allowed by the instrument Modify r5 to perform monitoring again first set to O using the arrows and the SEL button and then to the required value between 1 and 5 again using the arrows and SEL Press PRG to save In the event of blackouts keypad resets or Off commands from digital input monitoring will be reset and then start from zero when the same conditions as described above are true Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def r5 0 temperature monitoring not enabled r6 night time regulation with third probe if regulation is performed using the night time set point regulation can be selected using either the virtual probe or the third probe only cabinet hot point r6 night time regulation using probe S3 r6 0 night time regulation using the virtual probe Parameter can be transferred via LAN from the Master to its connected Slaves
77. on that may occur Note that thermistor temperature probes NTC or PTC have no polarity and so the terminals may therefore be connected either way If connection to a supervisory network is featured connect the shield of the RS485 channel to the 485 ground on the instrument The secondary side of transformers supplying the units must not be earthed If it is necessary to connect to a transformer that has a secondary earth an insulating transformer must be installed in between If more than one control is connected to the same transformer refer to the following wiring diagrams for details of the wiring method Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 6 4 User interface Buttons and display Each instrument features 12Vac power supply two and a half digit display temperature display to the tenths LED indicating the output state 4 buttons for programming buzzer according to model PANEL MOUNTED VERSION 4 1 The LED display The display shows temperature in the range 55 to 95 C The temperature measured by the probe is displayed with decimal resolution between 19 9 and 19 9 It is possible to exclude the decimal point by modifying the value of parameter 6 According to the function in progress the display shows one of the following e in normal operation temperature measured by the probe selected by parameter 7 e in parameter selection phase code of the parameter or the value associated
78. operating time at the start of defrost 0 protection times are observed l protection times are not observed defrost has greater priority and takes no account of the compressor timings As an example this is useful for avoiding a delay in the hot gas defrost when the compressor has just stopped and has been restarted with a minimum time between two starts It must be remembered however that in this event the maximum number of compressor starts per hour may not be observed Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d9 0 the defrost follows the compressor times by default these are set to zero D Defrost probe reading This parameter displays the value being read by the defrost probe in the units where it is fitted When the parameter d has been SEL selected pressing will not allow the value to be changed but the value recorded by the defrost probe can be read Available on all models dA Third probe reading SEL This parameter displays the value read by the defrost probe where fitted Once the parameter dA has been selected pressing does not allow the modification of the value but rather the reading of the temperature measured by the third probe S3 Available on all models dC Time bases Changes the units of measure used to count the times for parameters dI interval between defrost and dP duration of defrost 0 dl is expressed in hours a
79. pe d parameters selected remain valid In particular it may be useful to set dI 0 and inhibit defrosts by RTC on Master units fitted with RTC if manual defrosts or by external contact only are desired This function is useful for performing real time defrosts To do this simply connect a mechanical or electronic timer to the digital input When the contact of the timer switches from open to closed the request for defrost is activated As mentioned in the description of parameter d5 more than one unit can be connected to the same timer By selecting a different value of d5 for each unit simultaneous defrosts can be avoided NOTE in the case of a Master with connected Slaves on the closing of its digital contact a network defrost will be performed even when a local defrost cannot be performed ATTENTION If A8 4 on Master unit with connected Slaves a network defrost can be performed by a command from the supervisory system if the latter exploits the functions supplied by the Master If AS 4 on one Slave a defrost can be performed by e a command from the supervisory system if the latter exploits the functions supplied by the Master that the Slave is connected to and if the Master is fitted with built in RS485 interface e the closing of the digital input DIN2 of the Master if on the Master A9 1 t timer defrost dP unit 1 defrost EE y unit 2 defrost richiesta sbrinamento defrost request EXPLANATION t
80. play shows tC and the age of all of the alarm events is replaced by the symbol _ _ On instruments whose serial number is 23610 the display of the code hE indicates the accidental loss of the alarm log Exiting the display of the log PRG The display of the log is exited either by pressing the button or by not pressing any button for 60 seconds Deleting the log The alarm log can be deleted in three ways e by carrying out a System Reset SEL e on the start up of the controller pressing the and Wh anon together for 5 seconds e reconfiguring the controller from Master to Slave or vice versa Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 19 10 New local network functions 10 1 Network defrost for multiplexed systems The Master controls the defrost in the entire multiplexed island cabinet controlled by the Master cabinets controlled by the Slaves This waits for all units to exit the actual defrost stage before sending the end defrost command to the entire network The Slaves which have exited the actual defrost stage await the end defrost command from the Master before passing to the dripping stage This waiting status is identified on the display by the flashing of the def and fan LEDs Once they receive the end defrost command the Slaves move onto the dripping phase The actual defrost stage for each individual unit and for the network as a whole end in any case due to timeout
81. probe display cre dC Time base for the intervals between defrosts and maximum duration C 0 l flag 0 __ dP 0 hours mins T mins sees SS a ALARM PARAMETERS Type Min Max UOM Def To LAN New ao Fan and alarm differential ce 01 20 ecer 20 AH High temperature alarm indicates the maximum variation from the F 0 199 C F 4 setpoint AH 0 excludes the high temperature alarm PP AL Low temperature alarm indicates the maximum variation from the set F 0 199 C F 4 __ point AL 0 excludes the low temperature alarm o o A4 Digital input no 1 configuration dcj poto LAS Digital input no 1 configuration dcj p7 poto A6 Compressor stop set Duty Setting from external alarm C 0 100 min 0 A4 1 or 2 a5 1 or 2 0 compressor always OFF __ 100 compressoralwaysON N E y E A7 Detection delay time for the delayed alarm input A4 2 or A5 C 0 199 min 0 2 Ad Temperature alarm delay C 0 199 min 120 AS Configuration of the instrument s virtual digital input 0 0 A eer TE RA RA AT __ Master 1 propagation 0 no propagation Pd Enable remote alarm signals from Slaves on the Master 1 C 0 l flag 1 remote alarm signals enabled 3 Only the new repeaters with updated FW allow the display of the codes besides the temperature the others if d6 2 display on
82. rol layout ar A AE A A ah use nl 14 12 FINO GU CHO srl 14 7 3 Technical pe CAOS ke E ASADAS AS AAA dai Biere BR 15 7 4 DESCHPLON OF he KEPA AA AA E A A A 15 LD The FSW DUtton and the command c sil AAA AAA A A A AAA A 16 7 6 How to USA a en 16 8 Re configuring a control with the default parameters 000000000000000000000000000000000000sssnnnnnnnnnnssssssnnnnnssssnnnnnnnsssssssssssssssssssssssssnne 18 9 Phedr iaia aaa 19 10 New local network RTT ar sisisciscccsiesencsnvsvewacessescncssssewacesedscesdsevsbussssssssesdscsssssccesstssdassdcssdsseasssancedesvesacussuacseuaedaescessdsebesascdevscceuses 20 HOSE Network defrost tor Multiplexed systems cae ss tet ine reine ne ante 20 10 2 Remote alarny sie wal Sas A A A bastante ida E 20 193 Ihencworesizlaiclaoa anelli ili iaia 20 10 4 Configuring a network by downloading the parameters from the Master unit 20 10 5 Functions available to the RS485 serial supervisory SyStemM eeeeeeeeseeeaasassaasseeeeeeeees 21 11 DESCRIPTION OF THE CONFIGURATION PARAMETERS c0sssssssssssssssnnnnnssssnnssssssssnnnnnnnssssssnnnssssssssssssnnnssssssssnsnnnnss 22 ILE Contietration parameters iaia rail 22 11 2 P tamieler categories A EA A AA TA DLR 22 VEL TNC T 7 een ee nee ee 22 114 parameters for the management of the temperature probes iii 23 11 3 Te parameters 1or temperature Tegulalon einen ea nee 23 11
83. rrent defrost while successive defrosts will be inhibited until the next closing of the same digital contact This function is useful for example with refrigerated cabinets fitted with hot gas defrost With these installations it is necessary to defrost an island at a time so at any one moment some islands will be enabled for defrost and others inhibited Another use for this function is to inhibit defrost of those units open to the public during shopping hours ATTENTION If A8 3 the defrost of a unit can be enabled disabled by a command from the supervisory system if the latter exploits the functions supplied by the MPXs or by the closing opening of digital input DIN2 on the Master if A9 1 on the Master In this way using only the DIN2 digital contact on the Master the defrost of an entire multiplexed sub network Master connected Slaves can be enabled disabled or only of those units in the sub network where A8 3 NOTE the enabling disabling of defrost by digital contact is local for all units a Master with A4 A5 A8 3 and with its corresponding digital input open cannot defrost locally while it may command the defrosts of its connected Slaves manual cyclical or timed defrost the latter option is only available on models fitted with RTC A4 A5 A8 4 input associated to defrost by contact This function allows the defrost to be activated by an external contact If the defrost is activated by an external contact all the ty
84. s the parameter download from the Master units via password 66 if pressed at instrument start up activates the procedure for reloading the controller s default configuration if pressed for 5 seconds together with buttons I and 9 in normal operation resets the controller displays and or selects the SET POINT displays the value associated to the selected parameter if pressed for more than 5 seconds together with button 2 accesses the type C parameter menu configuration allows access to the unit configuration In parameter as Master or Slave at the Boot of the unit or immediately after its reset if pressed together with button10 on Master units starts a network defrost on the entire multiplexed island on all units if pressed during the start up of the controller resets the alarm log if pressed for 5 seconds together with buttons I and 2 in normal operation resets the controller if pressed alone for 5 seconds during the probe test phase accesses the manual probe calibration procedure see calibration resets the temperature alarms and restarts their monitoring attempts to reload the parameters if there is a configuration read error during the start up of instrument passes from one parameter to the previous decreases the value associated to the parameter if pressed for more than 5 seconds activates a manual defrost if pressed together with button I activates
85. stems 1 and 11 and in network systems 111 A6 Compressor stop by external alarm The function of this parameter is similar to that of parameter c4 duty setting As well as acting on the probe alarm it acts on the external alarm via the multi function input A4 A5 A8 1 or2 When an external alarm occurs whether immediate or delayed the compressor works for a period equivalent to the value given to parameter A6 in minutes while remaining off for a fixed period of 15 minutes When given two particular values A6 serves the following functions A6 0 the compressor always remains off A6 100 the compressor always remains on The fans continue to be controlled according to the selected parameters see category F Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def A6 0 compressor off in the case of external alarm AT Delay in signalling of external alarm multi function input Sets the delay in minutes in signalling the external alarm when A4 A5 A8 2 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def A7 0 Ar Enable Master for the signalling of alarms on remote Slave units The Master unit if Ar 1 can indicate the presence in its own sub network of a Slave in alarm If an alarm is activated on one Slave the Master displays the signal nX alternating with the display of the temperature
86. t if enabled as alarm e the signalling of loss of communication to the LAN by a networked controller both for Master and Slave units Display of the log The alarm log is accessed using a password in the same way as the configuration parameters the password used is 44 Description of the alarm log If the alarm log is empty the display shows three horizontal dashes otherwise the following information is displayed e the index of the position of the alarm in the log preceded by a graphic symbol displayed in the highest value digit of the display e the alarm code e the time elapsed in hours only for units fitted with RTC and configured as Master from the recording of the event For the Slave units the graphic symbol _ _ is displayed in the place of the time The three displays appear in an alternating cycle The log is scrolled by pressing the arrow buttons A to display the older alarms A for more recent alarms The size of the log is 9 events The alarms appear in the log according to the time of their recording At each new alarm event the older alarms are pushed back in the list If the log is full the most recent alarm replaces the oldest event When an alarm event remains in the log for more than 199 hours its age is replaced by the symbol _ _ NOTE If the instrument loses its current time value this may occur if the rechargeable backup battery fitted in the instruments with RTC discharges the dis
87. t 5 seconds e the password entry prompt will appear 00 blinking e setthe password using the arrow buttons and on the remote control e press the SEL button to confirm 7 5 2 Direct access to the alarm log AY Pressing the HISTORY button allows direct access to the controller s alarm log The scroll the list of the saved alarms To exit the display of the alarm log press the PRG button Access to the log is inhibited when the instrument is in parameter programming mode Similarly access to the parameter programming mode is inhibited while the log is displayed buttons on the remote control r 7 5 3 Command buttons e Lan Defr starts a network defrost valid only on units configured as Master e CC ON starts the continuous cycle e CC OFF stops the continuous cycle e AUX ON switches on the local auxiliary relay e AUX OFF switches off the local auxiliary relay e toggles the network auxiliary relay on off 7 6 How to use the remote control 7 6 1 ACCESS WITHOUT USING THE CODE H3 0 The ENABLE button is not required if H3 0 In this case the remote control is always enabled 7 6 2 ACCESS USING THE CODE H3 0 How to set the access code setting the code The controllers are supplied by the manufacturer without the access code To enter the code modify parameter H3 Proceed as follows e press PSW for at least 5 seconds e the controller will show the password entry prompt e enter
88. t by temperature Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 10 dt End defrost temperature This parameter allows the end defrost temperature as measured on the evaporator to be set In any case the maximum defrost time is equal to the value in minutes set for parameter dP When the temperature measured by the defrost end probe is higher than the defrost end temperature set by the user the defrost cycle will not be performed that is only the following dripping and if required post dripping phases will take place The use of the third probe as a defrost probe on a second evaporator allows an end defrost when both probes S2 and S3 measure a temperature above that set for parameter dt Def 4 C 5 5 List of parameters to be checked during installation Code Parameter Type Min Max UOM Def LAN PARAMETERS eee Sn _Number of slaves for the Master 0 5 0 SA _Address in the LAN for the Slave 0 5 0 CONTROL PARAMETERS eee rd Control differential F 01 199 CrE 2 DEFROST PARAMETERS gt dO Type of defrost C 0 1 flag 0 dI Interval between defrost cycles F 0 199 hours 8 dt Defrost end temperature F 40 199 EE 4 ALARM PARAMETERS eee Ad Temperature alarm delay C 0 199 min 120 FAN PARAMETERS eee F4 Fan relay used for the fans or as auxiliary C 0 2 0 OTH
89. t repeat the local keypad on the instrument When a button is pressed on the remote control the LED above the decimal point on the main display of the instrument is turned on The LED will stay ON while the button is pressed on the remote control 7 4 1 Function buttons ENABLE accesses the procedure for enabling the use of the remote control History direct access to the alarm logs PSW accesses the password entry prompt ESC 1 exits the parameter programming phase without saving the modifications made this option is not available on the local user interface where the parameter programming phase is exited by timeout 2 ends a session dialogue with an instrument on the remote control NUMERIC KEYPAD sets the enabling code for using the remote control This code is recommended when more than one controller is within the operating range of the remote control as in the case of a series of controls installed in an electrical panel Selecting a different code for each instrument allows the remote control to interact with the required controller only For the use of the buttons see the section HOW TO USE THE REMOTE CONTROL Buttons used to modify the main parameters direct access buttons All type F parameters and cc and Ad parameters type C are directly accessible from the remote control and their identification code is shown next to the associated button For the use of the buttons see the section HOW TO U
90. t symbol will only appear at the start up of the instrument To reset correct operation a special RESET procedure must be followed This procedure is only to be performed in exceptional circumstances as its possible causes are exceptional Thanks to the RESET procedure it is almost always possible to reset correct operation In any case it is useful to investigate the cause of this type of error to be able to prevent it from occurring again Special attention is drawn to the Installation chapter and the Warnings paragraph on page 9 of this manual To reset the controller e disconnect power from the instrument or reset it manually by pressing the PRG amp SEL amp UP buttons together for 5 seconds PRG mute e During the start up reboot of the instrument press and hold the button e c e the display shows E hold the e inthis way the instrument indicates that it is accessing the default configuration parameters until the display shows the decimal point e once the default configuration is reloaded the instrument automatically performs a reboot Important after the RESET procedure the values of each single parameter will be the default values Any modifications made before the reset procedure will therefore be lost Important note given the delicate nature of this operation the reset procedure must be carried out by specialised personnel In any case the procedure will not damage the instrument b
91. the Master 2 Assign the value of SA on each Slave Please heed the following warnings e During installation check that in the multiplexed network the values of SA on the various units are different from one another e The value that may be assigned to SA must not be above the value of Sn on the Master if the unit is to be correctly managed by the latter e Ina multiplexed network only one unit can be configured as Master In Installation parameter The value of this parameter configures the unit as Master or Slave this can be accessed by pressing the PRG and SEL buttons together for 5 seconds during the power on phase of the instrument that is when first 3 hyphens and then the identification code of the unit as Master uM or slave u 1 5 address of slave in the LAN are displayed e In 1 unit configured as Master e In 0 unit configured as Slave Available on all models The default for this parameter depends on the model of the instrument see the second row of the following table for the default values of the various models NOTE in all models configured as Slave access is denied even by password to the following parameters HO Sn Ar A9 the clock and the parameters for setting the defrost times units configured as Slaves do not manage these RTC PARAMETERS only on Master unit Type Min Max UOM Def To LAN New hh Current hour F 0 23 hours m
92. til of the elimination of the fault As the compressor is unable to function based on the temperature because of the faulty probe it is activated cyclically with an operating time ON time in minutes equivalent to the value assigned to c4 and a fixed OFF time of 15 minutes There are two values of c4 that produce special functions If c4 0 the compressor will remain permanently OFF in the case of a defective probe if c4 100 the compressor will remain permanently ON the 15 minute off time being cancelled The following particular situations should also be considered if the regulation error occurs while the compressor is off it 1s turned on respecting the delays set by parameters cl and c2 and remains on for a time equal to c4 This is called duty setting operation which is signalled by the COMP LED that flashes during compressor off period and stays on when the compressor is in operation The fans continue to operate according to their respective parameters see F parameters If the probe fault alarm is signalled while the compressor is operating the compressor is switched off without regard to the minimum operating time which may have been selected under parameter c3 and remains off for 15 minutes the COMP LED flashes during this phase After this periodic operation commences according to the operating time set under c4 If the probe fault alarm is signalled while the system is in defrost or in continuous c
93. tion allowed from the set point i e the requested operating temperature Therefore High temperature alarm gt set point value of AH Note that changing the set point automatically changes the high temperature alarm while the maximum deviation permitted remains the same The end of the alarm condition occurs when temperature lt set point value of AL value of AO The end of the alarm condition automatically cancels the corresponding signal The re occurrence of the alarm condition returns the instrument to monitor the condition itself Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def AH 4 Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 33 AL Minimum temperature alarm This parameter allows the low temperature alarm to be selected The value of AL does not indicate the temperature at which the alarm will sound but rather the maximum deviation from the set point i e the requested operating temperature that 1s permitted The low temperature alarm is given as follows Low temperature alarm lt set point value of AL Note that changing the set point automatically changes the temperature at which the low temperature alarm will be given while the maximum differential permitted AL remains as set The end of the alarm condition occurs when temperature gt set point value of AL value of AO The end o
94. tiplexed network pressing the button on the Master propagates the action of the Master s auxiliary relay to all the Slaves with a relay fan relay or fourth relay that is configured as an auxiliary F4 2 or Hl 3 The action of the Master s auxiliary relay is also propagated to the Slaves by a variation closing opening of a contact to the Master s digital inputs see configuring the digital inputs parameters A4 A5 A8 EXAMPLE in the case of the Curtain Switch simply connect a switch to the second digital input of the Master DIN2 so as to be able to also turn on off the lights on the refrigerated cabinets controlled by the Slave units the Slaves must be set as F4 2 or Hl 3 10 4 Configuring a network by downloading the parameters from the Master unit A Master Slave network is used to control the temperature of refrigerated cabinets with similar product types As a consequence the Master and the Slaves must have the same values for the parameters such as the regulation set point the end defrost timeout the end defrost temperature the interval between defrosts the dripping time etc All the instruments in the MPX Series feature the possibility of manually configuring just the Master unit and then transferring the Master s configuration via network to the corresponding Slave units The following is a list of the parameters that can be transferred via LAN by the Master to the Slaves TABLE OF DOWNLOADABLE PARAMETERS
95. ttery Immunity to disturbance electromagnetic compatibility conforming to standards En50081 2 emission Conformity to safety standards for devices in l v Disposal of the product only on models with this function available NTC Carel 55 c 95 c 0 5 C 10 C 70 c 0 C 50 c 12Vac 150mA IP65 with panel mounted and gasket inserted by bracket Molex type crimped connectors should be integrated in class I or II devices 100 000 1B 250V normal D class A watch dog 2 and a half digits compressor continuous cycle defrost fan alarm auxiliary output buzzer optional regulation probe defrost probe cabinet hot point probe two type of action of the device 1C nominal values of the 3a 250Vac relays SPST relay Imax 3A res 2A Vac max 250V SPDT relay Imax 3A res 2A Vac max 250V SPST relay Imax 3A res 2A Vac max 250V SPST relay Imax 3 res 2A Vac max 250V duration of charged battery at least 72 hours The devices pass the EMC tests for general and domestic environments En50082 2 immunity En60730 1 do not dispose of the device as ordinary waste To dispose of the device refer to the environmental protection laws in force in your country Note the cables to be connected to the controller must be heat resistant 90 C Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 45 15 2 Temperature Resistance ratios for NTC thermistors The temper
96. tton on the remote control all the instruments will respond waiting for the code from the remote control this code thus allows the operator to identify and thus select which instrument to operate on Available on models IRMPX0A000 IRMPX1A000 IrmpxMA000 IRMPXMAC00 Def H3 0 LANPARAMETERS rne l Min Max vom Def roLAN New parameter accessible only on the Master units 0 LAN not present SA Slave address in the LAN C 0 5 q 0 Sn Number of Slaves C 0 5 0 parameter accessible only on the Slave units 0 LAN not present Configuration parameter of the single unit as Master IN 0 1 In 1 or Slave In 0 Sn Number of Slaves This parameter informs the Master of the number of Slaves it must manage It can be accessed using a password 22 and is used during the installation of a network of Master and Slaves Available on all models if configured as Master Def Sn 0 Master stand alone Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 30 SA Slave Address This parameter is assigned to the Slave when it is installed in a multiplexed network managed by a Master It is the address of the unit in the network the correct assigning of this number means the Master may communicate correctly with this unit Available on all models if configured as Slave Def SA 0 Slave stand alone Procedure for the installation of a multiplexed network 1 Assign the value of Sn on
97. unit is carrying out a defrost e Appears only if parameter d6 0 or d6 2 TC FLASHING RTC error on the units fitted with RTC and configured as Master e Set the hour and minutes on the user interface n1 n5 FLASHING ON THE MASTER Slave 1 5 in local alarm e Press AUX to reset the alarm ul us FLASHING ON MASTER Loss of communication with Slave 1 5 for around 3 minutes e Check LAN electrical connections MA FLASHING ON SLAVE Loss of communication between the Slave and the Master for at least 1 minute The defrost will be performed in any case by the timer which was reset to the value of parameter dI after the previous defrost e Check the electrical connections between the Slave and the LAN e The resetting of the network signals both on the Master and the Slaves occurs automatically as soon as communication is restored between the Master and the Slave gl d5 FLASHING ON THE MASTER Failed parameter download on unit 1 5 e Check the wiring of the LAN A e Press E for 5s to reset this signal NOTE The alarms on the Slave that generate the alarm n x x 1 5 on the Master are HI LO dA IA and rE Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 43 14 Troubleshooting _ _ _ _ _ _ _ _ _ _ _________ _ _ _ _ _ _ _______________ _ _ _ _ _ _ _ _ _
98. ut see parameter A4 or by a command form the Master in a LAN Temperature alarms are inhibited during defrosts If the parameter is set to a value other than the default value the new value will be operative only after the successive defrost Def 8 hours NOTE even when cyclical defrosts are not expected to be used for example with RTC or otherwise dI should not be set to 0 but rather to a value that is higher than the maximum interval between two defrosts This acts a safety function as it ensures at least one defrost is performed every dI hours even when due to unforeseen anomalies the programmed defrosts would normally not be performed This will not affect the normal performance of the programmed defrosts as the timer associated to the value of dl will be restarted at the end of each defrost dP Maximum defrost time The parameter dP determines the maximum duration of the defrost cycle in minutes This parameter represents the effective duration of the defrost when dO 2 or dO 3 If this parameter is modified while a defrost is in progress the new setting will not influence the duration of the current defrost but rather that of the successive defrost Def 30 minutes d0 Type of defrost Establishes the type of defrost 0 defrost by electrical heating element 1 defrost by hot gas 2 timed defrost by electrical heating element 3 timed defrost by hot gas Def d0 0 electrical heater defros
99. ut rather simply return it to the state in which it was purchased Thus if the operating parameters have been incorrectly or randomly modified to the point where the controller no longer functions as desired it can be reset to its initial configuration def If following the above described procedure the E symbol remains during power on followed by the letters EB press the y button until the letters disappear If the EB error remains and the letters EA appear the instrument must be replaced If on the other hand the letters disappear the controller can continue to be used If the EB error occurs frequently and or tends to persist the controller should be checked as its original specified precision can not be guaranteed Cod 030220191 rel 2 0 dated 25 06 01 preliminary version 18 9 The alarm log All the models in the MPX Series are fitted with an alarm log that records up to until 9 alarm signals The models configured as Master and fitted with RTC also allow the display of the age of each alarm that is the time in hours elapsed between the moment in which the log is consulted and the time the alarm was recorded Events recorded in the log The following anomalies are saved in the log e the high and low temperature alarms e the regulation probe error probe SI and or probe S3 short circuited and or open e the defrost probe error short circuited and or open e the signalling of temperature defrost ended due to timeou
100. y between the defrost start command and its actual start The digital input for defrost see parameter A4 A5 A8 can be used to carry out defrosts in real time Simply connect a timer to the multifunction digital input see parameter A4 A5 The defrost will be activated when the timer contacts close Where several units are connected to the same timer use parameter d5 to delay the various defrosts so as to avoid overloading the power supply Furthermore to avoid unwanted defrosts being commanded by the unit s internal clock parameter dI should be set to 0 on all the units and timed defrosts should be disabled on all units configured as Master and fitted with RTC defrosts only from keypad or from multi function contact Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d5 0 no delay in defrost from the start up of the instrument or the activation of the multifunction input d6 Management of the instrument s display and the repeater during defrost There are 3 options U Display not locked out and temperature reading alternates with the symbol dF on both displays l Both displays locked at the last value displayed before of the start of the defrost 2 dF fixed on both displays Readings normally return to both displays after the post dripping phase under normal regulation Repeaters belonging to older models do not manage the display of symbols for these d6 1 and
101. ycle control immediately exits from the current state and duty setting starts To re activate the defrost or continuous cycle operation a back up operation can be performed by modifying parameter A assigning it values 0 or 2 third probe not present If the error disappears the machine returns to normal operation regulation If the error persists even after this operation the correct operation of both probes S1 and S3 must be checked by opening the panel and checking the electrical connections Please keep in mind that in the case of a regulation error on a Master Slave unit neither manual defrosts nor continuous cycle can be performed A Master which shows a regulation error may on the other hand manage the defrosts of all its Slaves network defrost C4 ON compressore compressor ff l OFF OFF 15 min Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 compressor always off in the case of faulty ambient probe Cc duration of the continuous cycle The period in hours for which the compressor remains in operation so as to lower the temperature even below the set point If cc 0 the continuous cycle is not activated Control exits from continuous cycle mode when the period set under parameter cc has elapsed or when the minimum set temperature has been reached set point AL Parameter can be transferred via LAN from the Master to its connected
102. ycle duration C 0 15 hours 4 c6 Low temp alarm exclusion time after continuous cycle C 0 15 hours 2 d _ DEFROST PARAMETERS Type Min Max vom Def ToLAN New dO Defrost types C 0 3 0 0 electrical ends by temperature and or for timeout 1 hot gas ends by temperature and or for timeout 2 electrical ends for timeout 3 hot gas ends for timeout dl Interval between two defrosts F 0 199 hours 8 e activated for defrosts without RITO dt Defrost end temperature F 50 199 C F 4 dP Maximum defrost time F 1 199 min 30 d4 Defrost when the instrument starts 0 No 1 Yes C 0 1 flag 0 d5 Defrost delay when instrument starts or from digital input C 0 199 min 0 0 No display block and the temperature alternates with the dF symbols on both displays d6 Main display and repeater during defrost C 0 2 flag l 1 display is blocked on both displays 2 dF on both displays 3 dd___ Drippingtime afterdefrost S min 2 d8 High temperature exclusion time after defrost and if A4 5 A5 5 or F 0 15 hours 1 __ AS 5 alarm exclusion time from the opening of the door o bo __ d9 Defrost priority over compressor protection 0 No 1 Yes C 0 l flag 0 a Defrost probe display s cre dA Third

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