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1. C O0 15 hos 4 oe d DEFROSTPARAMETERS Type Min Max UOM Def Via LAN Type of defrost 0 electric end by temperature time as safety 1 hot gas end by temperature time as safety 2 electric end by time 3 hot gas end by time Type of control for LAN defrost 0 start only 1 start and stop Operating time with temperature read by S2 less than 1 C before starting a defrost Defrost start delay from controller power up or on from digital input Display management during defrost 0 display the temperature alternating with the symbol dF 1 hold on last temperature displayed Enable skip defrost function L35 1 99 LE ag ps0 qo cw o Temperature alarm bypass time after defrost and or open door F 0 15 hours 1 e Priority of defrost over protection times par c C Di o IS min 2 J e lt m N Mn D UJ N hous 1 0 60 m Oe e i Maximum defrost time F I 180 min 30 e dt Enddefrosttemperatue F 500 300 C 40 e 0 192 hours 8 e BEE lt Fan management 0 fans always on except cases F2 F3 Fd C l flag 1 fans controlled according to absolute set point F1 F2 Fans off when control inactive 0 No 1 Yes C 1 fla 1 active only with F0 0 F3 Fan management during defrost 0 Fans on off during dripping dd C 1 1 Fans off 2 Fans also on du
2. up MasterCase amp 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 the thorough reading of this manual will guarantee correct installation and safe use of the product described This device has been manufactured to operate risk free for its specific purpose as long as it is installed operated and maintained according to the instructions contained in this manual the environmental conditions and the voltage of the power supply correspond to those specified All other uses and modifications made to the device that are not authorised by the manufacturer are considered incorrect Liability for injury or damage caused by the incorrect use of the device lies exclusively with the user Please note that this unit contains powered electrical devices and therefore all service and maintenance operations must be performed by specialist and qualified personnel who are aware of the necessary precautions Disconnect the machine from the mains power supply before accessing any internal parts Disposal of the parts of the controller The controller is made up of metal and plastic parts and contains a lithium battery All these parts must be disposed of according to the local standards in force General warning
3. Default 1 minutes Carel code 030220221 Rel 1 1 dated 18 11 04 30 MasterCase 5 9 H other settings ee Max UOM _ Def Via LAN Serial address Ie e e E I rg 3 HO oaa Ei ONG tnt CC NC Enable ONO from supervisor Ce an H Configuration of AUX2 output C 0 9 J J5 H7 Configuration of compressor output only on the master C 1 2 1 fo H0 serial address Assigns the instrument an address to which it responds when connected to a supervisory or telemaintenance system It is also used for the serial connection or network connection In a master slave LAN configuration for the slaves it represents the local address from 1 to 5 in the LAN Make sure that if a series of Masters with their own LANs are connected to a supervisor network RS485 the address of each master must be set considering the number of slaves present in the previous LAN This concept is expressed by the following formula H0 HO previous master Sn previous master 1 Default 1 H1 enable disable remote control Enables the use of the infrared remote control Default 0 H2 remote control enabling code This is used to enter a code to distinguish when programming from the remote control between various controllers located in the same area Default 0 H3 enable ON OFF from the keypad Enables or disables the ON OFF button on the user interface H3 0 ON OFF butt
4. St and AO e check the correct operation of the temperature probes The alarm is reset automatically when the temperature returns within the set limits see parameter AH EE Displayed during operation or on power up Data acquisition error e Try to restore the default parameter values HA HACCP alarm type HA A high temperature alarm has occurred according to the settings of parameters tr Ad AH St e Check the HACCP parameters e check the temperature and the correct operation of the temperature probes Carel code 030220221 Rel 1 1 dated 18 11 04 50 MasterCase HF HACCP alarm type HF A high temperature alarm has occurred according to the settings of parameters tr Ad AH St A power failure has occurred for more than one minute and when power returned the temperature was higher than the value set for AH St e Check the HACCP parameters e Check the temperature Ed The last defrost ended as the maximum time parameter dP exceeded before reaching the end defrost temperature The signal is active only if parameter r3 The signal remains on until a defrost is performed that ends at the set temperature e Check parameters dO dt and dP e Check the efficiency of the defrost devices dr The digital input configured as door switch A1 A5 A8 5 is open for a time greater than the value set for parameter d8 e Check that the door is closed e Check the status of the co
5. Carel code 030220221 Rel 1 1 dated 18 11 04 29 MasterCase 5 8 F evaporator fan management parameters F FAN PARAMETERS Type Min Max UOM Def ViaLAN Fan management 0 fans always on except cases F2 F3 Fd 1 fans controlled according to absolute set point F1 Fan off time F 40 0 50 0 C 5 0 e Fl Fans off when control inactive 0 No 1 Yes F3 active only with F0 0 Fan management during defrost C 0 2 l e 15 mn 1 F0 fan management The fans can be managed by the fan controller which manages them according to the temperature measured by the end defrost probe S2 see parameter F1 or alternatively can be always on and stop when the controller is switched off see parameter F2 F0 0 fans managed based on the parameter F2 F0 1 fans subject to the fan controller see parameter F1 It should be remembered that if a dripping phase see parameter dd 0 and or post dripping phase see parameter Fd z 0 is set the fans are always off in these phases Default F0 0 F1 absolute fan control set point parameter valid only if F0 1 The fans are controlled according to the following formula Temperature S2 lt F1 A0 gt fans ON Temperature S2 gt F1 gt fans OFF Default 5 F2 fans off when the controller is off parameter valid only if F0 0 This is used to decide whether the fans must be always on except in cases F3 dd and
6. rear of panel by DIN rail Terminal display 3 wire serial connection max length 10m 24 35Vdc 1 5 W max optional PST Small or Large terminal optional display PSTOOVR100 for li classification according to protection Class II when suitably integrated transformer with double insulation and RTC clock management of days hours minutes precision only if RTC clock board present mee mide n personnel 0T50 C non condensing humidity 20T70 C non condensing humidity normal 250 V long fire category D unsupervised operation category Class A IP20 IP40 only on the rounded front panel Important in models MGE0000020 when installing a series of units in the same electrical panel do not supply 24Vac power with just one common transformer but rather fit each MasterCase with a transformer ina se an Un c oO Di lt lt Un c oO DI O c Oo lt e gt C m an Carel code 030220221 Rel 1 1 dated 18 11 04 53 CARE Technology amp Evolution CAREL S p A 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 030220221 Cod CAREL REL 1 1 dated 18 11 04
7. suitably protect the load power lines on the controller with devices circuit breakers rated according to the loads connected Safety for operators and precautions when handling the controller To protect the safety of operators and safeguard the controller before doing any work on the panel always disconnect the power supply Electrical damage may occur to the electronic components as a result of electrostatic discharges from the operator Suitable precautions must be therefore be taken when handling these components specifically e before handling any controller earth yourself not touching the board does not prevent a spike as a 10000V discharge easily reached with static electricity can produce an arc of about 1cm e all materials must be kept inside their original package as long as possible If necessary take the controller from its package and place it into an antistatic package without touching the rest of the controller with your hands e absolutely avoid non antistatic plastic bags polystyrene or sponges e do not pass the controller directly to other operators to prevent from electrostatic induction and discharges CONTENTS Il General characteristics aiar 3 P NMommeharactertisues oL Master ASE alla a li iran dillo 3 Ze Layout of the hafdwar ssssi lavati 5 2b Meanineobtbe Mparand OUDELS aeie T E O E O Le ti dre e 5 22 Codes OL the models and accessorio Snai er RO ANITA 8 2o A ERRO SO O 9 IE COCCO PERRIN 11 Da
8. superhea detection i Use of just one pressure probe propagated from the master to the slaves Pc pressure probe alarm delay The MasterCase controller checks that the pressure values read by the ratiometric pressure probes are within the limits envisaged for the model set see parameter P1 In addition the probes are also checked to see if they are disconnected or short circuited In all these cases a time can be set for the controller to wait for the fault to pass before signalling the alarm It should be remembered the controller also signals if the probes are out of range and so the delay set must allow for any transitory excess pressure values on the unit Default 5 minutes PH refrigerant type Parameter PH is used to set the type of refrigerant used in the system Each value corresponds to type of gas according to the following table 0 R134a 6 R290 I R22 7 R600 2 R404a 8 R600a 3 R410a 9 R717 4 R407c 10 R744 5 R507 1 R1270 Default 2 R404a Pi pressure probe model on the evaporator This parameter is used to set the model of the probe installed at the evaporator outlet Pi 0 probe with range 1 4 17 barg 0 75 psia Pi 1 probe with range 1 9 34 barg 0 150 psia Pi 2 probe with range 0 34 47 barg 0 500 psig In accordance with the operating pressure of the system it is recommended to use the probe with the maximum value as near as possible to the max pre
9. 2 or 3 dP represents the maximum safety duration of the defrost that 1s the defrost will in any case stop after the time dP even if the end defrost temperature has not been reached Default 30 minutes dt end defrost temperature This parameter is used to set the evaporator temperature measured by probe S2 at which the defrost 1s stopped If when a defrost is started d0 0 or 1 the temperature ready by S2 is greater than the value of dt the unit goes directly into the dripping phase If probe S2 is faulty the defrost in any case ends after a maximum time parameter dP Default 4 Carel code 030220221 Rel 1 1 dated 18 11 04 26 MasterCase 5 7 A alarm management parameters Temperature alarm return and fan activation differential see parameter F1 ALS Dist puse e 5 1 8 L LH 9 1 Alarm delay from digital input Ax 2 min Virtual digital input configuration Ad Temperature alam delay a AH _ High temperature alarm deviation from the set Lib Low temperature alarm deviation from the set point 20 0 i Enable the master to signal the alarms on the slaves f ag only on the master A0 Fan and alarm differential Represents the differential used to establish the temperature threshold for the deactivation of a high or low temperature alarm AL and AH see the figure below and for the management of the fans see parameter F1 Allarme bassa temperatura Allarme
10. Weekday of 1st defrost See note 2 px qo d Lcx gu dc hl Hourofistdefrost C 0 23 hours 0 ml Minutes of Istdefrost Sc 0 59 min 0 J Weekday of 2nd defrost See note 2 pe fof ig ff of Hour of 2nd defrost Weekday of 8th defrost See note 2 hi Hour of i defoet ne 9 79 em E m8 MinutesofSthdefrst C 0 59 min td Cumentweekday OSES 1 7 1 th Curnthor OSES 0 23 hus 0 t Cumentminutes F 0 59 min 0 Note 1 Value of gt 0 putnotactive No function associated il ww Immediate external alarm Contact open alarm active 2 1Delayedexternalalam Contactopen alarmactivewithdelay set for parameter AJ Enable defrost Contact open defrost not enabled Pe Contact closed defrost active Immediate activation of the Contact closed the defrost starts immediately This can be used for example when NEN EM connected to an external mechanical timer Door switch Contact open door open When the door is opened the controller and the fans stop If the door remains open for a time greater than the value set for parameter d the controller and the fans start again and a terminal error is signalled 6 Remote ON OFF Contact closed ON Contact open OFF Curtain switch Contact closed night curtain closed deactivation of light relay with Stn 0 set point variation with Stn 1 by th
11. Yes MOP threshold saturated evaporation temperature Integration time during MOP close valve ee RED recovery in opening MEE ses e e VISIBLE ONLY TO SUPERVISOR VIA PC PlantVisor software PF Valve position number of steps read only parameter Sv 0 30000 stes PL Evaporation pressure read only parameter Sv bar __ CPI Initialvalve position number of steps Sv 0 3000 steps 350 Pdis DisablePID Syo Mea o Pmp Manual valve position Sv JO 3000 Jsteps Jo Carel code 030220221 Rel 1 1 dated 18 11 04 38 MasterCase P1 valve model The MasterCase controller can manage 4 different models of valve Parameter P1 is used to set the model installed P1 0 CAREL E2V P valve 390 steps BLACK stator P1 1 Sporlan valve models SEI 0 5 SEI 1 SEI 2 SEI 3 5 SEI 6 SEI 8 5 SEI 11 P1 2 CAREL E2V A valve 480passi RED stator P1 3 Sporlan model SEH 25 valve Note Whenever this parameter is modified the controller must be turned off and on again so as to allow internal values associated with the type of valve chosen to be loaded Default 2 P2 dead band The dead band is the semi interval of temperature around the superheating set point in which control is deactivated For example setting this parameter to 1 C with a set point of 5 C means that the superheating can vary between 4 C
12. alta temperatura Low temperatura alarm High temperatura alarm Set point Default 2 0 AH High temperature alarm This value is related to the set point It indicates the maximum deviation allowed from the set point above which a high temperature alarm is activated indicated by the code HI on the display and signalled audibly by the buzzer In numerical terms Control temperature gt set point St AH gt HIGH TEMPERATURE ALARM HI Changing the set point therefore automatically changes the alarm threshold The point at which the alarm 1s deactivated is as follows Control temperature X set point St AH AQ When the alarm condition is no longer present the corresponding audible signal and message the display are automatically cancelled Default 0 0 AL Low temperature alarm the maximum deviation allowed from the set point set point below which a low temperature alarm is activated indicated by the code LO on the display and signalled audibly by the buzzer In numerical terms Control temperature lt set point St AL gt LOW TEMPERATURE ALARM LO Changing the set point therefore automatically changes the alarm threshold The point at which the alarm is deactivated is as follows Control temperature gt set point St AL AQ When the alarm condition is no longer present the corresponding audible signal and message the display are automatically cancelled It should be remembered
13. code 030220221 Rel 1 1 dated 18 11 04 10 MasterCase 3 Installation 3 1 Electrical connections For details on the electrical connections to the main board see the layout shown above WARNINGS Avoid installing the controllers in environments with the following characteristics 1 Relative humidity greater than 85 non condensing 2 Heavy vibration or shocks 3 Exposure to continuous water sprays 4 Exposure to corrosive or pollutant gases e g sulphur or ammonia fumes saline mist smoke so as to avoid corrosion and oxidisation 5 Strong magnetic and or radio interference therefore avoid installing the unit near transmitting antennae 6 Exposure of the controllers to direct sunlight or the elements in general The following warnings must be heeded when making the connections during the pre installation of the controllers 1 The incorrect connection of the power supply may seriously damage the system 2 Separate the probe signal and digital input cables as much as possible from the power and inductive load cables to avoid possible electromagnetic disturbance Never lay the power cables and the probe cables in the same conduits Avoid installing the probe cables in the immediate vicinity of power devices thermal magnetic circuit breakers and the like Reduce the path of the probe cables as much as possible and avoid paths that surround power devices Only use IP67 sensors for the end defrost probe position the probes with t
14. in the table below BUZZER DESCRIPTION MODELS where featured and AUX M defrost probe error terminal probe error on display connected connected LO active low temperature alarm ALL EE not active data saving error ALL HA active HA alarm HACCP ALL HF active HF alarm HACCP ALL CCM i board and controller management code MGE0000020 board out of range management code MGE0000020 Ed2 evaporation pressure sensor PE on driver board out On MasterCase with EEV of range management code MGE0000020 LOI C MA uX X 1 5 nX X 1 5 dX X 1 5 Carel code 030220221 Rel 1 1 dated 18 11 04 49 MasterCase 7 2 Description of the signals and alarm codes shown on the display rE Control probe error e Probes not working the probe signal is discontinued or short circuited e Probes not compatible with the instrument If control is based on the virtual probe value of parameter 4 between 0 and 100 this error will be generated only when both the probes are broken In fact the breakage of just one of the two probes automatically moves control to the other probe El Room probe error S1 e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E2 Evaporator probe error S2 e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E3 Third probe error S3 e Pr
15. into two families e Frequent parameters indicated by type F in the parameter tables e configuration parameters indicated by type C with access protected by a password to prevent unwanted tampering The parameters can be programmed as follows e from the keypad e via LAN download parameters from master to the connected slaves e viaan RS485 serial connection if the optional card is fitted To set the parameters from the keypad proceed as follows Accessing the type F parameters e press for more than 5 seconds e the E od shows the parameter PP Parameter Password e press and ba to scroll the parameters Accessing the type C parameters e press for more than 5 seconds e the 9 shows the parameter PP Parameter Password Q e press e press or ba until displaying 22 password to access the type C parameters 2h e confirm by pressing e the display shows the parameter PP again e press El Or ba until displaying the parameter to be modified Modifying the parameters After having displayed the first parameter either type C or type F proceed as follows e press 5 or 25 until displaying the parameter to be programmed 2s e press D to display the value of the parameter RA e US value using ka and or Ea Q e press 2 to temporarily confirm the values saved and return to the display of the parameter code e repeat all the operations in the point Modifying the parameters to modify
16. of different factors electromagnetic disturbance dirt accumulated inside the valve etc may involve deviation in the actual steps of the valve compared to the controlled position An automatic step recovery procedure has been implemented during the closing of the valve and this parameter can be used to enable a step recovery function also during the opening of the valve PrA 0 step recovery during opening disabled PrA 1 step recovery during opening enabled Default 1 PSb standby position This indicates the position as the absolute number of steps where the valve must move to when stopped controller off during defrosts etc Note although this value can be set to 0 for the CAREL valves it is recommended for internal mechanical reasons to set a minimum value of 10 keeping account that this value in any case corresponds to the closing of the valve Default 80 steps PARAMETERS VISIBLE ONLY TO SUPERVISOR VIA PC PlantVisor software For reasons of safety or simply due to technical limits linked to the display the following parameters are only made available to the supervision software running on a PC PF valve position number of steps read only parameter This represents the position of the valve as the absolute number of steps Note that this is the value calculated by the controller that is the position where the valve has been moved to based on the conditions measured It is therefore an as
17. other cases it may be useful to reset the instrument by assigning the parameters the default values To perform this operation proceed as follows disconnect the instrument from the power supply press Set l and Down Fa at the same time and switch the instrument back on while holding the buttons when the display shows the combination of characters 213 release the buttons At this point the instrument is automatically rebooted and is ready to operate correctly NOTE If the error EE occurs quite frequently the controller should be checked as the memory may be compromised and the initial precision not guaranteed Carel code 030220221 Rel 1 1 dated 18 11 04 13 MasterCase 4 LAN functions The MasterCase instruments can be connected together to create a LAN Local Area Network in master slave configuration The main purpose of the LAN is to allow communication between as series of instruments maximum six one master and five slaves with synchronised operation for the control of multi evaporator utilities such as multiplexed showcases Fach instrument can be configured as either the master or a slave by simply setting a parameter This configuration allows the synchronisation and coordination of defrosts the propagation of the status of the digital inputs as well as display on the master of any alarms active on the slaves The particularly reliable structure of the LAN 16 bit CRC error checking means the values rea
18. parameters A1 A5 7 r6 0 no movement control with virtual probe r6 1 when the digital input closes control is performed on probe S3 Default 0 rt temperature monitoring time Once the temperature monitoring function parameter r5 has been enabled this parameter records the time in hours from the start of the monitoring cycle Read only parameter Default 0 rH maximum temperature measured in the time rt Once the temperature monitoring function parameter r5 has been enabled this parameter records the maximum temperature reached since the start of the monitoring cycle Read only parameter Default 50 0 rL minimum temperature measured in the time rt Once the temperature monitoring function parameter r5 has been enabled this parameter records the minimum temperature reached since the start of the monitoring cycle Read only parameter Default 90 0 5 5 c times and safety parameters 0 always OFF 100 always ON Temperature alarm bypass time after continuous cycle Start control delay from the opening of the valve Continuous cycle duration c0 Control start delay when switching the instrument on This parameter is used to delay by a set time in minutes the activation of the control functions from when the instrument is switched on In multi utility installations the parameter c0 can be used to avoid simultaneous starts of the various units thus preventing the overloading of the refr
19. speed determined by the integration constant set for parameter PM2 Default 60 C PM2 integration time during MOP close valve This represents the integration time for the high pressure protection function MOP When the threshold set for parameter PMI is exceeded the controller will begin to close the valve at a speed determined by the integration set for this parameter During this function there may be variations in the evaporation temperature in any case swings of even 2 C can be considered physiological as the MOP is a safety procedure and not a control routine Default 100 seconds 10 PM3 MOP function activation delay This is the waiting time from the start of the controller for the activation of the MOP protection function When the unit is started this time must elapse before the MOP protection function is activated so as to allow the unit to reach an evaporation pressure above the threshold value assigned to the MOP Default 2 seconds PM4 maximum superheated gas temperature This parameter sets the maximum temperature thermometric allowed for the gas leaving the evaporator The value read is therefore measured by the superheated gas temperature probe Tsh This parameter limits the action of the MOP protection so that when reached it completely stops the corrective action of the MOP function until the temperature of the refrigerant returns below the set value Setting the parameter to the maximum
20. that the low temperature alarm threshold is also used in the continuous cycle see parameter cc as the minimum value for stopping the function Default 0 0 NOTE the temperature alarms are not generated in the following cases during a defrost during the continuous cycle Ad temperature alarm delay Indicates after how many minutes the temperature alarm is signalled from when the corresponding alarm threshold has been exceeded If the alarm condition is longer present before the time Ad has elapsed no alarm signal is generated The temperature alarm delay has no effect on two special functions the defrost and the continuous cycle To delay a temperature alarm after these functions use the parameters d8 for the defrost and c6 for the continuous cycle Default 120 minutes Carel code 030220221 Rel 1 1 dated 18 11 04 27 MasterCase DIGITAL INPUT CONFIGURATIONS The MasterCase series instruments feature five digital inputs that can be configured using parameters Al A2 A3 A4 and A5 following A1 A5 respectively associated with the inputs DII to D15 In addition a further parameter A8 is used to manage a digital input called the virtual input as it 1s not physically present on the instrument but rather associated with the status of digital input DII on the Master in a LAN master slave configuration On a master controller the input will be associated with a specific signal from the Supervisor otherwise p
21. the showcases but also ensures considerable advantages in terms of energy savings In fact the use of the night time set point the possibility of different types of intelligent defrosts and the control of electronic expansion valves are just some of the functions that allow significant energy savings to be achieved Local network LAN The MasterCase instruments can be connected together to create a LAN Local Area Network in master slave configuration for the control of multiplexed showcases or multi evaporator utilities Each instrument can be configured as either the master or a slave by simply setting a parameter This configuration allows the synchronisation and coordination of defrosts the signalling of the status of the digital inputs as well as the display on the master of any alarms active on the slaves Up to 6 instruments 1 master and 5 slaves can be connected together The particularly reliable structure of the LAN 16 bit CRC error checking means the values read by the control temperature and or pressure probe on the master can be shared across the network thus allowing a saving in the number of probes required Finally as regards the supervision software the master acts as the interface for the slaves as only the master needs to be fitted with the serial card and connected to the RS485 line to be able to manage all the instruments in the local network Alarm log Each unit can save up to 10 alarms Each new alarm is recor
22. the second evaporator can be enabled by using probe S3 to manage the end defrost temperature see parameters H5 and H6 Default 0 d end defrost probe calibration S2 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 decrease the temperature by 2 3 degrees set C 2 The offset may be set from 20 to 20 with precision to the tenth of a degree Default 0 0 A probes present The value of this parameter tells the instrument whether the probes S2 and or S3 are connected The value of 4 only makes sense on controllers configured as slaves as with this setting the slaves no longer uses their own probes for the control functions but rather use the probe reading sent by the master Do not set the value 4 on a controller configured as master The possible values of this parameter are as follows 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 4 control probe sent by the master only for the slaves The room probe S1 is always considered as being present Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 19 MasterCase 5 4 r temperature control parameters CONTROL PARAMETERS Minimum set point value allowed by the user 50 0 50 0 Maximum set point value allowed by the use
23. to the value read by probe S3 It can therefore be used to control an electric defrost heater on a second evaporator Carel code 030220221 Rel 1 1 dated 18 11 04 31 MasterCase solenoide valve p lt Two independent defrost outputs H5 9 ON OFF valve output solenoid works in parallel with the controller and can be used to control a solenoid valve Default 0 H6 AUX2 configuration Same as parameter H5 As default this output is configured for the control of the hot wire rail heat Default 5 H7 compressor output configuration This parameter is to be used only on the unit configured as the master H7 1 compressor output 9 The output will work in the traditional mode that 1s based on the control status of the unit H7 2 master slave network compressor output The output will be active while any of the units in a master slave network LAN has a control request in progress This configuration can be used in cases where a multiplexed cabinet or multi evaporator utility has only one solenoid valve or one compressor In this case simply connect the solenoid valve or the compressor to the master compressor output to manage the unit correctly Note that in this case any electronic valves managed by the Master unit will be closed or opened based on the control conditions and consequently independently from the compressor output Default 1 superhea detection Connection of the soleno
24. value 80 C is equivalent to disabling the function Default 80 0 C Pol display superheating value read only parameter By enabling parameter Pol the superheating value read by the MasterCase controller can be displayed This value is equal to the difference between the temperature read by the superheated gas temperature probe Tsh and the saturated temperature corresponding to the evaporation pressure read by the ratiometric pressure transducer P E Read only parameter Default Po2 valve opening percentage read only parameter This represents the opening of the valve in percentage terms Read only parameter Default Carel code 030220221 Rel 1 1 dated 18 11 04 42 MasterCase Po3 superheated gas temperature read only parameter This corresponds to the reading of the temperature probe located on the evaporator outlet pipe temperature of the superheated gas Tsh Read only parameter Default Po4 saturated evaporation temperature read only parameter This 1s the value of the evaporation pressure read by the ratiometric pressure transducer P E converted into the corresponding saturated temperature Read only parameter Default PrA enable step recovery in opening The opening closing of the valve by the controller and the reading of its position are logical values calculated by the controller itself and that do not necessarily correspond to the actual position In fact a series
25. was open e ifthe controller was in defrost mode it remains in defrost mode When the controller is restarted the set safety times are observed see type c parameters AI A5 A8 6 remote ON OFF By setting the input for this function the controller can be switched on off using an external contact Contact closed controller ON Contact open controller OFF Switching off is not equivalent to disconnecting power but rather is a logical Off that is the controller goes into standby ignoring all the digital inputs and outputs the defrost requests continuous cycle and Duty Setting The controller however still continues to display the temperature alternating with the message Off If the instrument that is Off is a master connected to a series of slaves it is in any case able to manage the network defrost and signal the alarms on the remote units Al A5 A8 7 curtain switch The digital input set to this value is used to activate deactivate the light relay output when the corresponding contact is opened closed In addition if the parameter Stn is set to 1 the set point will be varied by the value of the parameter r4 Al A5 A8 8 duty cycle setting operation The opening of the contact associated with the digital input set with this value will switch the controller to duty setting operation as described earlier see parameter c4 Al A5 A8 9 door switch with controller ON The behaviour of the contro
26. ACCP alarm and its signals codes HA or HF on the display the buzzer and the alarm relay and in addition deletes all the corresponding data saved LED on steady HACCP alarm Button yellow LED Normal operation Pressed for 1 second activates deactivates the AUXI output relay light LED on steady AUXI output relay light active Button green LED Normal operation Pressed for 5 seconds unit ON OFF LED On steady controller on Note the ON OFF function depends on an enabling parameter if not enabled the controller is always ON the LED in any case displays the status Button yellow LED No function associated Button green LED Normal operation Pressed for 5 seconds activates or deactivates the continuous cycle LED on steady continuous cycle on Button green LED Normal operation Pressed for 1 second switches the light on off e pressed together with button 8 displays the value of the third probe S3 pressed together with button 7 for 5 seconds activates or deactivates the continuous cycle Parameter programming Passes from one parameter to the next increases the value of the parameter displayed LED On steady compressor on Flashing compressor activation request in progress cooling request Carel code 030220221 Rel 1 1 dated 18 11 04 9 MasterCase Button yellow LED Normal operation Pressed for 5 seconds starts a manual defrost
27. Fd or only when the controller is on F2 0 no fans always ON F2 1 yes fans off when controller off Default 0 F3 fan management during defrost parameter always valid This is used to decide whether the fans must be on or off during the defrost and during the dripping phase F3 0 fans on during the defrost During the dripping wait in the case of master slave network defrost and dripping times 1f set by the parameter dd the fans are always off F3 1 fans off during the defrost F3 2 fans always on during the defrost and also during dripping This is useful in the applications where the fans must always be on yet a pause dripping time is required after defrosting During the dripping wait in the case of master slave network defrost and dripping times 1f set by the parameter dd the fans are always on If a post dripping time has been set parameter Fd z 0 during this time the fans are always off Default 1 Fd fans off in post dripping Indicates the time in minutes after the dripping phase see parameter dd known as the post dripping phase that the fans stay off for even if the controller and thus the power supply to evaporator have already restarted This is useful to allow the evaporator to return to the normal operating temperature after defrosting and to freeze the remaining moisture and droplets thus avoiding wetting the goods inside the showcase when the fans are started
28. H Except for sudden variations in the load or disturbance in the system the showcase will remain in ON for a longer time than with traditional control yet with a temperature and relative humidity that are much more stable and nearer to the set point Default 0 0 Phr enable fast update of the valve parameters to the Supervisor As the variations in the values relating to the electronic valve absolute position in number of steps position as a percentage evaporation pressure superheated gas temperature superheating etc are more frequent compared to the others and are also important in evaluating the correct operation of the valve a quicker update every second instead of the normal 30 seconds can be enabled for these variables to the supervision software In a network of instruments it is recommended not to indiscriminately enable this parameter on all the instruments but rather only one at a time for service and testing Phr 0 fast update disabled Phr 1 fast update enabled Default 0 PM1 MOP threshold saturated evaporation temperature This parameter defines the high suction pressure protection activation threshold Maximum Operating Pressure indicated in saturated C Above this value the valve control ignores the superheating value normal operation and rather acts on the saturated suction temperature so as to return it and maintain it below the set value The controller will begin to close the valve at a
29. Room probe S1 2 End defrost probe S2 3 Third probe 3 S3 4 Virtual control probe depending on parameter 4 5 Terminal probe if present Default 4 display virtual probe T display on remote display Selects the probe reading displayed on the remote display 0 Not present 1 Room probe S1 2 End defrost probe S2 3 Third probe 83 4 Virtual control probe depending on parameter 4 5 Terminal probe if present Warning The remote display code PST00VR100 only works if a terminal is also connected code PST00SR300 or PSTOOLR200 Default 0 display not present 8 third probe calibration The value assigned to this parameter 1s added to positive value or subtracted from negative value the temperature measured by probe S3 For example to decrease the temperature by 2 3 degrees set 8 2 The offset may be set from 20 to 20 with precision to the tenth of a degree Default 0 0 no offset to probe reading 9 defrost with probe 3 This parameter allows the third probe S3 to be used as the end defrost probe together with probe S2 In this case the defrost by temperature ends when the temperature measured by both the probes is greater than or equal to the end defrost temperature see parameter dt Consequently probe 3 can be used as a defrost probe on a second evaporator When programming an auxiliary output as a defrost output separate and independent management of the defrost on
30. Tabie of parameters a aria lea 44 Je Alisea AIR II 49 Tl Amomalous 0rspecial operation eisi ieri 49 7 2 Description of the signals and alarm codes shown on the display i 50 Ss Pechnicalspecificatio ns lla iaia 53 MasterCase 1 General characteristics MasterCase is the integrated system designed by Carel for the complete management of showcases MasterCase controls and manages the entire refrigeration unit both electrically and electronically The use of power relays means that MasterCase does not require an extra electrical panel and can directly control the lights defrost heaters fans cooling actuators and so on MasterCase can be connected to a local network to coordinate operations on a group of utilities synchronising defrosts or sharing probes Furthermore MasterCase can be integrated into the PlantVisor system which saves and displays all the data on the operation of the unit MasterCase is available for the control of showcases with both mechanical expansion valves and in the version with built in driver for the management of proportional electronic expansion valves which maximises the performance of the refrigeration unit The electronic valve optimises the evaporation temperature and superheating and reduces the power consumption of the unit Product conservation quality and lower weight loss are ensured by the greater temperature stability and the reduced need for defrosts using Mast
31. and 6 C without the controller attempting to modify it Outside of this interval obviously control resumes as normal Values higher than 2 C are not recommended Default 0 0 P3 superheating set point The parameter P3 used to set the desired superheating value This 1s the reference value that the controller tends towards by closing and opening the valve and not the actual guaranteed superheating value The latter depends on numerous factors such as the operating conditions the type and quality of the exchangers the sizing of the valve the position of the probes etc Note too low values for set point may compromise the stability of the showcase control functions and bring about the unwanted return of liquid It is recommended to not set the value below 3 C Default 8 0 P4 PID proportional gain The Proportional Integration and Derivative constants are the main parameters for the control of the electronic valve These define the PID part of the superheating control Refer to classic PID control theory for a more detailed description of their meanings The parameter P4 represents the amplification factor proportional gain The proportional constant internal value Kp defines the gain not for the PID control of the valve but also for all the active protectors low superheating threshold MOP function Default 5 0 P5 PID integration time This represents the speed with which the controller reacts in order
32. arameter A8 will have no function The functions corresponding to each value of A4 A5 A8 are described below AI A5 A8 0 digital input disabled The corresponding digital input is not used and ignores the closing opening of any contacts connected to it Al A5 A87 1 input associated with an immediate external alarm The digital input can be connected to an external alarm that requires immediate activation for example high pressure alarm etc The alarm is generated when the contact is opened and causes the display of the code IA the activation of the buzzer and the total shutdown of the controller and all the related outputs When the alarm condition is no longer present the unit returns to normal temperature control operation Al A5 A8 2 input associated with a delayed external alarm The operating mode is the same as for value 1 above in this case however the alarm signal can be delayed by a time in minutes equal to the value set for the parameter A7 Al A5 A8 3 input associated with a defrost enabling signal This setting is used to enable disable the defrost function When the contact is open the defrost is inhibited when the contact is closed the defrost is enabled If the contact is closed but there is no defrost request the defrost is obviously not performed If the contact is closed and a defrost is in progress when the digital input is opened the current defrost 1s stopped and the successive defrosts
33. are inhibited until the next time the digital contact is closed Possible applications This function is useful for example in the case of multiplexed showcases with hot gas defrost In these systems the defrosts are performed in islands and therefore at any one time some islands are enabled to defrost and others are disabled Another use of the function is to prevent defrosts on the units accessible to the public during opening times NOTE the enabling disabling of the defrost from a digital contact is effected locally A master with A1 A5 A8 3 and with the corresponding digital input open may not defrost locally while it may start the defrost on the units served manual cyclical or set time defrost Al A5 A8 4 input associated with an immediate defrost from external contact When the corresponding digital input is closed a defrost is started according to the criteria set for the type d parameters Possible applications This function is useful when defrosts need to be performed on a series of utilities coordinated by an external timer To avoid simultaneous defrosts the parameter d5 can be used to delay the start of the defrost on each unit Another use of the function is to prevent defrosts on the units accessible to the public during opening times NOTE in the case of a master with slaves when its own digital contact closes a network defrost will start even if the master will not defrost locally The following dra
34. arel code 030220221 Rel 1 1 dated 18 11 04 d MasterCase Terminals Interface Display MasterCase three wire serial connection maximum length 10m power supply from the controller 24 35Vdc 1 5 W max Vs gt Power supply Power green T gt Signal Tx Rx white G Earth GND red brown and yellow The colours refer to CAREL cables codes PSTCON0300 and PSTCONI000 LAN Local Area Network local network connection to other controllers max length 10m removable screw terminals for wires with cross section from 0 25 to 2 25mm2 T gt Signal G 2 Earth PROGRAMMING KEY The programming key should only be used when the controller is disconnected from the power supply 220Vac terminals not live and with the valve driver card powered in models code MGE0000020 24Vac power supply terminals The product code of the programming key is PSOPZKEY O00 For details on how to use the key refer to the corresponding instruction sheet 2 2 Codes of the models and accessories CONTROLLERS CODE MGE0000010 MGE0000020 OPTIONS AND ACCESSORIES CODE MGEOPZSERO MGEOPZCLKO MGECONO010 MGECON0020 PSOPZKEY00 PSOPZKEY AO USER INTERFACE CODE PSTOOLR200 PSTOOSR300 PSTOOVR100 PSTCONO300 PSTCON1000 Carel code 030220221 Rel 1 1 dated 18 11 04 DESCRIPTION MasterCase basic for showcases with TX V MasterCase with EXV driver option DESCRIPTION Serial board Clock board Removable connecto
35. button for 5 seconds on the terminals where present code PSTOOLR200 Note the HF alarm is acquired and consequently the corresponding data are saved only if the power failure lasts for more than I minute tr HA alarm delay Delay in the activation of the HA alarm Default 0 tA type of HACCP alarm Identifies the type of the last HACCP alarm HA or HF tA 0 no alarm tA 1 HA alarm tA 2 HF alarm Read only parameter Default 0 tO weekday of last alarm Displays the weekday on which the last HACCP alarm occurred tO 1 7 Monday Sunday Read only parameter Default 0 tH hour of last alarm Displays the hour at which the last HACCP alarm occurred Read only parameter Default 0 tM minutes of last alarm Displays the minutes at which the last HACCP alarm occurred Read only parameter Default 0 tt maximum temperature during alarm Displays the maximum temperature reached during the last HACCP alarm Read only parameter Default 50 0 tE duration of the HACCP alarm Duration in hours of the last HACCP alarm In the case of an HF alarm high temperature after power failure this 1s the duration in hours of the power failure Read only parameter Default 0 to reset HACCP alarms Deletes all the data saved for the HACCP alarm restoring the default values This function can also be performed directly by pressing the specific HACCP button located o
36. d by the control temperature and or pressure probe on the master can be shared across the network thus allowing a saving in the number of probes required Finally as regards the supervision software the master acts as the interface for the slaves as only the master needs to be fitted with the serial card and connected to the RS485 line to be able to manage all the instruments in the local network 4 1 Network defrost in multiplexed installations One of the functions that most requires synchronisation is the defrost function The master controls the defrosts on all of the slaves connected It waits for the defrost to be completed on all of the units before sending the end network defrost signal The slaves that have completed the defrost must wait for the end defrost signal from the master before switching to the dripping phase Once the end defrost signal is received the slaves go into dripping mode The defrost on each single unit and the network defrost are in any case stopped after the maximum defrost time set using the parameter dP default 30 min The network defrost is performed cyclically at a programmable interval set for the parameter dl It can also be started as manually pressing Sl for 5s on the master at set times if the RTC option is present 4 2 Remote alarm signals The unit configured as the master in a LAN can signal remote alarms present on the slave units if enabled by setting the corresponding configu
37. d in stand alone refrigeration units but rather only on centralised systems OSH 0 function deactivated Operating range of the showcase solenoid open valve controlled Control temperature CC Rn LIL OR EROR eee qx dea AA AET TT Ton Showcase differential C rr dr ur Tf Function activation threshold C Toff Showcase set point C Range in which the function is Time active Tf set point st differential rd 2 PRACTICAL EXAMPLES Control temperature CC ICI A ERTE E EEE T T T EEE EEIE I IIE qur ENS Ton Showcase differential C EEIE EN a PPP E Tf Function activation threshold C A 7 Toff Showcase set point C coe Function disabled or enabled with the value of the parameter OSH too low Control temperature C alain Ton Showcase differential C VD Function enabled with the value of the parameter OSH too high The advantages of the function are not exploited adequately WL Tf Function activation threshold C Toff Showcase set point C Carel code 030220221 Rel 1 1 dated 18 11 04 41 MasterCase Control temperature CC T Ton Showcase differential C SRI FONTE di rr rr rr Tf Function activation threshold C J Toff Showcase set point C Function enabled with the optimum value of the parameter OS
38. d is not entered only the type F parameters can be accessed This prevents access to the C parameters by unauthorised persons Once having accessed the configuration parameters the type F parameter can also be modified The procedure for accessing and modifying the parameters is described above PS alarm log password e after having reached the parameter PS Password Log e enter 44 as the password for accessing the alarm log BA e press for more than 5 seconds to access the log ALARM LOG All models of the MasterCase series feature an alarm log that saves up to 10 events The models fitted with RTC also allow the age of each alarm to be saved that is the time in hours that has elapsed from when the alarm was recorded to when the log is accessed The following events are saved in the log e the high and low temperature alarms HI LO the control probe error rE the end defrost probe error E2 the defrost by temperature ended by timeout signal if enabled as an alarm Ed the loss of LAN communication by a controller in network either the master unit or those configured as slaves MA and ux with x 1 5 Accessing the display of the log The alarm log is displayed by entering the value 44 for the password parameter PS and confirming by pressing the Set button for 5 seconds Description of the alarm log If the alarm log is empty the display shows three bars V otherwise the followin
39. ded in the log deleting the oldest event if necessary RTC The MasterCase can be fitted with an RTC card with backup battery for managing the defrosts at set times In addition this option allows the use of other functions such as the setting of a night time set point starting and ending at set times the saving of the age of the event in the alarm log and so on Carel code 030220221 Rel 1 1 dated 18 11 04 3 MasterCase Third probe This is used to measure the temperature at the hot point of the showcase and is used to help determine the reference control temperature In addition it can be used to manage the defrost function on a second evaporator Duty Cycle setting This function allows the utility to be operated even when there is a control probe fault In these cases operation will continue for a time in minutes equal to the value set for the parameter duty setting c4 with a fixed off time of 15 minutes Multifunction output The auxiliary outputs AUX1 and AUX2 are programmable and can duplicate the function of any of the outputs already present In addition they can be used as alarm outputs or hot wire outputs and can be configured as additional defrost outputs that are independent of the standard defrost output associated with probe 3 Multifunction input A total of five programmable digital inputs are available see the list of parameters These allow numerous possibilities such as the enabling of defrosts the ma
40. e value set for r4 Duty cycle setting from Contact closed activation of duty cycle setting external contact Contact open deactivation return to normal control 19 Door switch with control ON As per function 5 but the control remains active 10 Case cleaning input CCM Contact closed the control is normal and the counter dM is active Contact open the control is in standby and the counter dPM is active Note 2 0 Noevent Monday Sunday 8 From Monday to Friday 19 Saturday and Sunday Every day Carel code 030220221 Rel 1 1 dated 18 11 04 48 MasterCase 7 Alarms 7 1 Anomalous or special operation The MasterCase series instruments are able to automatically detect the main malfunctions Always check the connectors wired onto the cable from the terminal to the controller In the event of malfunctions the controller responds as follows e the malfunction is signalled on the display with an alarm code In particular the instrument displays the alarm code alternating with the temperature read by the probe when possible in the case of more than one alarm these are displayed in sequence alternating with the temperature for some alarms the buzzer if present sounds and the alarm relay is activated 2s Pressing D mutes the buzzer and de energises the alarm relay while the alarm code disappears only when the causes of the alarm are no longer present The alarm codes are listed
41. eaning and configuration of the parameters see the corresponding section further on in the manual Carel code 030220221 Rel 1 1 dated 18 11 04 11 MasterCase 3 2 2 Stand alone local network LAN and supervisor configuration There are three fundamental parameters used to configure an instrument for operation in a network LAN or supervisor or stand alone operation In HO and Sn In defines the unit as master n 1 or slave n 0 HO represents the address of the instrument in the supervisor network if master or in the LAN for a slave Sn represents the number of slaves present in the LAN to be set only on the master for the master the parameter In must be set to 1 parameter Sn slave number from 1 to 5 according to the number of slaves present in the LAN the parameter HO Serial address in the event of connection to a supervisor network must be set to a value equal to the sum of the address of the previous master plus its number of slaves plus one that is H0 H0 previous master Sn previous master 1 When switching the instrument on the display will show uM Master unit If the instrument 1s fitted with the RTC card the following parameters also need to be set parameters td th t day of the week hour minute parameters dx hx mx with x 1 2 8 days hours and minutes corresponding to the defrost times with 1 minute resolution for defrosts at preset times for t
42. erCase 1 1 Main characteristics of MasterCase Power supply 230V alternating current Appearance and assembly The dark plastic container the narrow stretched shaped and the rear supports for DIN rail mounting make MasterCase ideal for supermarkets and for installation under the showcase In addition the 220Vac power supply and the relay outputs with voltage signals for the various loads lights fans defrost etc mean significant time savings for the wiring and assembly of the electrical panel the controller itself featuring an integrated electrical panel User interface The user interface is from the series of standard PST terminals This series as well as being the same used by other Carel instruments meaning a reduction in the number of product codes offers various solutions display only small terminal with 3 digits and 3 buttons and large terminal with 4 digits and 8 buttons Each button 1s backlit by a LED to signal the status of the unit actuators on alarms etc The terminals are not required for the operation of the MasterCase but rather are used to program the controller The terminals can be installed at a distance of up to 10m from the instrument and can be connected live that 1s when the instrument is on without creating problems in operation Energy Savings Advanced Software Thanks to the numerous and innovative functions featured the MasterCase not only controls all the various configurations of
43. f the time dP the following defrost will be performed and the function will start again The following is a graphic representation of the function Def time Def Defrosts to be skipped time Manual lt 65 Expected defrosts skipped Def time Evaluation recommences Manual gt 65 This function should be used with the programming of the defrosts equally distributed over the day e g cyclical defrosts parameter dI This prevents skipping defrosts that would be the last before a long period programmed without defrosts for example when the clock is used to program the defrosting of the utility at night only Although this function can be used in combination with the other cases for example the function defined by parameter d3 it is recommended not to use these functions together so as to maintain better control over the defrosts performed and to be performed Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 25 MasterCase d8 alarm bypass time after defrost and or door open Indicates the time the temperature alarm signal is ignored from the end of a defrost and or after the switching of a digital input configured as the door switch see parameters A1 A5 In the latter case it also indicates the maximum opening time for the door in other words after the set time if the digital input door is still open the instrument will start the control functions again with an alarm signal on
44. formed Default 5 hours Temp S2 C 1 C I I I I I I I I I time Control I I I I I ON OFF time ti t2 tn gt d3 gt Start defrost d4 defrost when the instrument is switched on Starts a defrost when the instrument is switched on The possible values are 0 no no defrost is performed when switching the instrument on 1 yes a defrost is performed when switching the instrument on This function may be useful in cases where due to frequent power failures and the consequent resetting of the defrost timer see parameter dI the number of defrosts performed may be insufficient In multi utility systems to avoid the simultaneous defrosting of all the units when power returns set parameter d5 corresponding to the defrost delay to different values Default 0 d5 defrost delay when the instrument is switched on or from digital input Represents the delay time in minutes before starting a defrost when the instrument is switched on as set by parameter d4 or from a digital input set with parameters A1 A5 3 or 4 Default 0 d6 user interface and remote display management during defrosts During the defrosts two types of behaviour can be set for the user interface and the remote display 0 display the temperature alternating with the symbol dF on both displays 1 hold both displays on the last value displayed before the start of the defrost The display normally retur
45. fter having reached the parameter Pd Download Password e enter 66 as the password on a master unit with slaves to download the parameters from the master to the slaves for the uM of a multiplexed island A e press ZZ for more than 5 seconds to perform the download When the temperature is displayed again the download is complete DOWNLOAD PARAMETERS All the MasterCase series instruments feature the possibility of transferring the values of the parameters from the master to the slaves via the LAN This operation saves time when programming instruments in the same LAN with similar settings The table below lists the parameters that can be transferred via LAN from the Master to the Slaves TABLE OF DOWNLOADABLE PARAMETERS Use third probe as end defrost probe c2 Minimum OFF time do Typeofidefiost O O di Management of the terminal display and remote display during the defrost d Alam bypass time after defrost o 0 dd Defrostpriority over compressor safety S O dd JDrppigtim O S dP jMaximumdefrostduation Carel code 030220221 Rel 1 1 dated 18 11 04 17 MasterCase Download failed signals The master displays the failure of the 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 HO corresponding to the slave on which the data transfer via LAN operation failed 5 3 temperature probe manage
46. g information is displayed in sequence e the index of the alarm in the log preceded on the left by a graphic symbol e the code of the alarm e the time elapsed in hours only for units fitted with RTC since the event was saved If the RTC is not fitted the time is replaced by the symbol i The three displays are shown cyclically in succession In the log is scrolled by pressing the arrow buttons to display the older alarms A e ba to display the more recent alarms The log can save 10 events The alarms appear in the log according to the order they were saved in When a new alarm is saved the older alarms are moved back a position in the list If the log is full the new alarm deletes the oldest alarm FIFO logic First In First Out If an alarm has been present in the log for over 199 hours its age is replaced by the graphic symbol _ n NOTE If the current time value is lost on the instrument the display shows tC and the age of all the alarms saved is replaced by the graphic symbol Exiting the log Exit the display of the log by pressing D for one second or alternatively do not press any button for 30 seconds Carel code 030220221 Rel 1 1 dated 18 11 04 16 MasterCase Deleting the log The alarm log can be deleted by pressing and holding x and amp together for 5 seconds when the log is displayed At the end of the operation the controller will exit the display of the log Pd download password e a
47. g interval read only SET POINT PARAMETERS set point operating temperature F a sm 200 e Stn Select night time set pointmode C 0 2 flag 0 hSn Night time set point start time C 0 23 J hos 0 hSd__ Night time set point end time C 0 23 hos 0 SLI Absolute minimum temperature probe S1 C 500 C SL1 90 C function disabled Carel code 030220221 Rel 1 1 dated 18 11 04 46 MasterCase Min Model of valve 0 CAREL E V P 390 steps BLACK stator ORE 1 Sporlan 2 CAREL E V A 480 steps RED stator Deadband 100 Superheatingsetpoint C 00 250 PID proportional gain o o C 01 1000 PID integration time SC 0 250 s PID derivativetime C 00 1000 s PT Los supetheating esiol ITC P8 Lowsuperheatingintegrationtime C 0 255 s 0 di nien LACHEN SE i on the master Pressure probe from master only on the slaves C 0 1 flag e ita PH Type of refrigerant 0 R134a 6 R290 1 R22 7 R600 2 R404a 8 R600a C 0 11 2 3 R41 0a 9 R717 4 R407c 10 R744 5 R507 11 R1270 Pi Evaporation pressure probe field 1 1 10 bars 2 0 35 bars OSH Superheating Offset C ES 0 Enable fast update of the valve parameters to supervisor 0 Phr C No 1 Yes PMI Mor threshold saturated evaporation temperature EN 0 Es 0 60 0 BMG integration time d
48. gt Multifunction digital input 1 G DI2 gt Multifunction digital input 2 G DI3 gt Multifunction digital input 3 G DI4 gt Multifunction digital input 4 G DIS gt Multifunction digital input 5 Carel code 030220221 Rel 1 1 dated 18 11 04 5 Temperature probe inputs NTC sensors inputs for standard Carel NTC probes 10 kQ at 25 C connection with removable terminals for wires from 0 25 to 2 5mm2 maximum length of the cables 30m G S1 gt Room probe S1 G S2 gt End defrost probe S2 G S3 2 Third probe S3 G S4 gt Not used P C Condensing pressure gt Featured but currently not managed 56 Fan output L gt Line N 2 Neutral L gt Line N 2 Neutral S Compressor L gt Line N 2 Neutral Defrost L gt Line N 2 Neutral 230Vac 4A 250Vac Inductive Load 1000VA 250Vac Fluorescent Lamp 12 12 A 2 Hp 250Vac Inductive Load 12A 250Vac Resistive Load Power supply input from mains to two removable screw terminals with max 12A current rating minimum recommended cross section of the wires from 1 5 to 2 5mm2 L gt Line N Neutral Alarm output C gt Common N O Normally open voltage free contact N C gt Normally closed DI Auxiliary output AUX2 L gt Line N 2 Neutral Carel code 030220221 Rel 1 1 dated 18 11 04 230Vac 10 15 50 60 Hz 230Vac 10 15 50 60 Hz 12 A 250Vac Resistive Load 12A 250Vac Resistive Load Ma
49. he bulb placed vertically to assist the draining of any condensate Remember that the thermistor temperature probes NTC have no polarity and therefore can be connected in either order 3 If a connection to the supervisory network is envisaged connect the shield of the 485 cable to the 485 ground on the instrument 4 In the MGE0000020 models if a series of units are installed in the same electrical panel do not supply the 24 Vac from a common transformer but rather use a different transformer for each MasterCase 5 The secondary of the transformers must not be earthed 3 2 Configuration of the controllers 3 2 1 Parameters directly relating to the hardware When configuring an instrument that has just been installed there are a number of parameters that are strictly related to the hardware connections These parameters are as follows Al A2 A5 configuration of the digital inputs A probes present 4 virtual control probe determines which probe is used for the control functions 7 presence of the remote display determines the presence of the device and which probe is displayed on the remote display H5 H6 configuration of the auxiliary outputs AUXI and aux2 H7 configuration of the control output compressor output e P1 type of valve e Pi type of pressure sensor e PH type of refrigerant used in the system only for models with the electronic valve control code MGE0000020 For the m
50. he defrost after the maximum time set for the parameter dP using the code Ed 0 Signal disabled 1 Signal enabled Default 0 r4 deviation from the set point The value set for this parameter will only be effective if the parameter Stn is set to 1 or In this case the set point will change either when a digital input configured as the curtain switch is closed see parameters A1 A5 7 or at a set time if the controller is fitted with the RTC option see parameters hSn and hSd The set point varies by the value with sign saved for the parameter r4 as follows new set point set point St r4 Default 3 0 Carel code 030220221 Rel 1 1 dated 18 11 04 20 MasterCase r5 enable temperature monitoring Enables temperature monitoring recording the maximum rH and minimum rL temperatures reached in the interval rt max 999h r5 0 temperature monitoring disabled r5 1 temperature monitoring enabled on probe S1 The monitoring starts from when r5 is assigned the value 1 To disable temperature monitoring set r5 to 0 After 199 hours the maximum monitoring time allowed by the instrument the max and min temperatures are no longer recorded Set r5 again to start a new monitoring cycle Default 0 r6 control with the third probe from digital input This is used to move the temperature control to the third probe S3 when a digital input configured as the curtain switch is closed see
51. he slaves the parameter In must be set to 0 parameter HO address of the slave in the LAN When switching the instrument on the display will show uSx with x 1 5 value of H0 NOTE The addresses must be consecutive always starting from 1 Example a Qm E In 1 In 0 In 0 Sn 2 H0 1 H0 2 H0 4 Carel code 030220221 Rel 1 1 dated 18 11 04 12 MasterCase 3 2 3 Selecting the main operating parameters Setting the set point The set point parameter St is the main parameter as it represents the reference value for the operation of the instrument It is simple to access and set and this is done separately from the other parameters The default set point of the instrument is 20 C If this value is not compatible with the application it can be modified as follows gt A e press the button for one second to display the value of the set point The value flashes e the value of the set point can be increased or decreased using the EI and or a buttons until displaying the desired value n i set e press D again to confirm the new value Parameters relating to the set point Differential control hysteresis parameter rd The default of this parameter is 2 C The value is RELATIVE that is it 1s related to the set point being added to this value The set point represents the point at which the instrument is switched off while the activation poi
52. id valve or compressor to the master only Carel code 030220221 Rel 1 1 dated 18 11 04 32 MasterCase 5 10 LAN parameters LAN PARAMETERS O ons Number of slaves only on the master 0 LAN not present Unit configuration master or slave In 1 Master unit In 0 Slave unit Sn number of slaves This parameter is only valid on the controllers configured as the master parameter In 1 and is used in a LAN to tell the master controller how many slaves it must manage Default 0 In master slave configuration The value of this parameter configures the unit as the master or a slave When the controller is started the display will show uM Master unit if In 1 or uSx Slave unit number x x 1 5 address of the slave in the LAN if In 0 In 1 unit configured as master In 0 unit configured as slave Default 0 Suggestions e During the installation of a LAN make sure that the values of HO on the various units are all different the value assigned to HO on any slave must not be higher than the value of Sn on the master eo e aLAN must not have more than one unit configured as master e the addresses of the slaves must be consecutive 5 11 set point parameters SETPOINTPARAMETERS Type Min Max UOM Def Via LAN set point operating temperature Pepa epe pep Stn Select night time set point mode hSn Night time set point start time
53. if the conditions are right pressed together with button 6 for 5 seconds activates or deactivates the continuous cycle e pressed together with button 8 displays the value read by the end defrost probe S2 pressed on controller power up together with button 8 loads the default parameters Parameter programming Passes from one parameter to the previous decreases the value of the parameter displayed LED on steady defrost on flashing defrost request in progress Button red LED Normal operation Mutes the audible alarm buzzer and deactivates the alarm relay if active pressed for 1 second displays and or sets the set point pressed for more than 5 seconds with no alarms active accesses the menu of type F parameters frequent pressed together with button 6 displays the value read by the third probe S3 e pressed together with button 7 displays the value read by the end defrost probe S2 pressed on controller power up together with button 7 loads the default parameters Parameter programming Displays the value of the selected parameter or exits the display pressed for 5 seconds permanently saves the modifications made to the parameters LED on steady alarm active 2 3 2 Functions of the buttons and LEDs on the PJ Small terminal PST00SR300 As regards the PJ Small terminal the functions of the buttons are the same as seen for buttons and on the PJ Large terminal Carel
54. igeration system when starting Safety control Duty cycle setting function iui i e a ON Accensione strumento sa ME TERRE OFF ATTTOTTTTTTTTTTTT ON Richiesta intervento I Insertion i EN L BEND OFF ON Compressore Compressor OFF Default 0 minutes Carel code 030220221 Rel 1 1 dated 18 11 04 21 MasterCase c1 Minimum time between two successive starts Sets the minimum time in minutes that must elapse between two activations of the controller irrespective of the temperature and the set point This parameter can be set so as to limit the number of starts per hour For example if the maximum number of starts per hour allowed is 10 simply set c1 6 to ensure that this limit is observed CM n n a ON 1 AN richiesta inserimento l l insertion request SE OFF compressore compressor C1 Default 0 minutes c2 Minimum OFF time Sets the minimum controller off time in minutes compressor output The compressor output is not reactivated until the minimum time selected c2 has elapsed since the last deactivation This parameter is useful for ensuring the balancing of the pressure after shut down in the case for example of systems with hermetic and capillary compressors ESSI richiesta inserimento insertion request v compressore compressor Default 0 minutes c3 Minimum ON time Sets the minimum control on time The compressor output is not deactivated unless it has been ac
55. ing the number of absolute steps required to reach such position This is possible only if the automatic control of the valve has been disabled using the parameter Pdis described above Set a number of steps that 1s consistent with the model of valve installed see parameter P1 Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 43 MasterCase 6 Table of parameters PP Parameter Password F 00 199 22 PS LogPaswod o F 00 19 44 Pd Download Password F 00 19 66 PROBEPARAMETERS Type Min Max UOM Def Via LAN D Meswemetsmliy 1 i DI Virtual probe between S1 and S3 tet tet P otmbeiiepebey PE Eble decima pom NoYes TEO 1 IT TR eb 0 not present 17 room probe S1 2 end defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe CARI iL Defrost also with third probe S3 1 the defrost finishes when the temperature read by probes C 0 l flag 0 e S2 and S3 are greater than dt see also parameter HS Probes present 0 room probe only S1 17 room probe S1 and third probe S3 2 room probe S1 and defrost probe S2 3 all present S1 S2 and S3 4 control probe sent by master only on the slaves Room probe calibration S1 20 0 20 0 0 0 T Bn es bee B 208 202 reo Terminal display management 0 not present 17 r
56. ire AWG22 24 maximum length 10m Relay outputs type of action and Action type 1B microswitching disconnection and number of operating UL 250Vac 30 000 cycles cycles EN60730 100 000 cycles Note changeover relay defined only for N O or N C Compressor Valve 2 Hp 12 12 A 250Vac min 100 000 cycles UL 12A 10 FLA 60 LRA 250Vac 12 4 A 250Vac min 100 000 cycles 2500 W gt cosg 1 34 Hp 12 4 A 250Vac min 100 000 cycles 500 W gt cosq 0 6 Light 2 Hp 12 12 A 250Vac min 100 000 cycles n ES fluorescent lamp 1 000VA 110 uF max 15 000 cycles 34 Hp 12 4 A 250Vac min 100 000 cycles 2500 W gt cosg 1 AUXI Ya Hp 12 4 A 250Vac min 100 000 cycles SPDT contact IHP 12 4 A 250Vac min 100 000 cycles 250Vac power supply terminals screw terminals 12A 250Vac UL 10A minimum recommended cross section 1 5 2 5 mm for power supply to loads and controller Terminals for I O signals screw terminals for cables with cross section 0 25 2 5 mm I O connections max length of signal cables the pressure probes and valve motor are temperature probes NTC max 30 m available only on code MGE0000020 digital inputs max 30m pressure probes ratiometric max 10m electronic valve motor outputs max 10m LAN terminals screw terminals for cables with cross section 0 25 2 5 mm Carel supervision screw terminals for cables with cross section only if supervisor board present 0 25 2 5 mm optional wall mounting
57. is no longer able to manage the valve and starts operating in safety mode to avoid the presence of liquid at the evaporator outlet while still guaranteeing a minimum of cooling to the showcase The safety position is calculated by taking 50 of the average position of the valve in the last hour of operation The valve will remain in the safety position until the problem is no longer present or in any case for no longer than 1 hour after which the valve will be closed e check the electrical connections e check the condition of the probe Ed2 Superheating temperature sensor NTC Sh on the driver board out of range See the description of the alarm Ed1 e check the electrical connections e check the condition of the probe LO1 Temperature on probe S1 below the set value see parameter SL1 The alarm is reset automatically when the temperature read by the probe increases by 2 C above the set threshold e check the setting of parameters SLI and 4 e check the position of the room probe S1 Carel code 030220221 Rel 1 1 dated 18 11 04 5 MasterCase dF Defrost in progress e This is not an alarm signal but rather an indication that the instrument is performing a defrost e This appears only if parameter d6 0 or d6 2 tC RTC error on the units fitted with RTC and configured as master e Set the hour and minutes from the user interface or via supervisor MA on slave Loss of communication between the sla
58. l Blecincal Connections ilaele 11 3 2 C ontiburdtiom OF LMG COM OUTS i n E EE T E E S 11 Aa AGAIN TUM COONS siciliani inerente R 14 4L Network defrost im multiplexed installations aoo aoi eo ta aeu ea eet te Cei ee eat Cue ae Eon eta ea eaaa eTa 14 42 Remolcalama salsa dus IE ui tob tei Li coU OUR DP li india iii alli 14 43 Transmission of control signals and probe readings anna 14 DS Setting the parameters sissi nali 15 54b Classificato re riRepardmeteiSs illa 16 502 Password Parame iS leoni iaia ian 16 xd Temperature probe management para metis arreca 18 S4 a lemperatire control parameters iodo me irte prot eati ILL aaa 20 5 0 emes and safety paame IDs orco erepto een ute Don OG Ra tex ERU oS UR Ma Redes i aae nox Popes e 21 50 id Celrost imanacecment parametri LI ede MUI MI LI ai 23 Dil AS aaao cement Harane esseci lilla i ali DEL E cM suse ieu ai 21 2 5 Je evaporator an Manasement pParamicters ys uico pa tert b etat t pue ub is E r EEN 30 x MEL TOU E put c E m 3l 2 10 LAN paranoica 33 Salt SeEpolme parametrico 33 Sl AS TEAC CP al AIC UC FS sree rel T et veces 35 3545 RTC RealTime Clock parameters bla E cud ted bostes dites uM Suse cs lie ra ei ia iii 37 5 14 P electronic valve EEV option code MGE0000020 iii 38
59. ller when the digital input set to this value is opened is the same as for the door switch An 5 with the difference that in this case the outputs remain active ON This configuration can be used in cases where the door is opened and closed frequently for short periods frozen food display cabinets etc Al A5 A8 10 Case Clean Management This configuration of the digital input is used to manage the case cleaning function as described earlier see parameters dM and dPM Warning For the correct management of the functions associated with the digital inputs the values of A1 A5 A8 must be different from one another or alternatively must be equal to zero That is if A1 A5 A8 are assigned values other than zero the following must be true Al AS A8 Default 0 AT external alarm detection delay Sets the delay in minutes relating to the external alarm from digital input when A1 A5 A8 2 Default 0 minutes Ar enable the master to signal the alarms on the slaves This parameter allows the master unit to be enabled to display the presence in its LAN of one or more slaves with alarms If an alarm is activated on a slave on the master the display shows the signal nx alternating with the temperature where x is the address of the slave in question x 1 5 This type of alarm also activates the buzzer and the alarm relay Ar 0 function disabled Ar 1 function enabled Default 1
60. lue and vice versa by setting two time bands see parameters hSn hSd and the figure below The actions carried out will be the same as described in the previous point Stn 1 and Ax 7 If a digital input is programmed as a curtain switch Ax 7 the change in the status of this input will only change the status of the light output Default 0 hSn Night time set point start time If the night time set point from RTC is used Stn 2 this parameter indicates the time when the set point changes see parameter r4 along with the change in the reference probe if set see parameter r6 See the figure below Default 0 hSd Night time set point end time If the night time set point from RTC is used Stn 2 this parameter indicates the time when the function and any related actions end See the figure below Default 0 night time set point daytime set point night time set point hSd hSn MINIMUM AIR OUTLET TEMPERATURE ALARM This function should be used when the controller is set to use the virtual probe parameter 4 0 and 100 A Virtual probe control temp In this case in fact the temperature control is based on a weighted value of the two probes S1 and S3 This means that despite the fact that the reference 1s constant the temperature of the two probes may in reality differ significantly with the risk of having an evaporator air outlet tempe
61. ment parameters Enable decimal point 0 No 1 Yes Remote display management only if a user terminal is connected 0 not present 17 room probe S1 2 end defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe E hi probe cation SB a0 x oo Defrost also with third probe S3 1 the defrost finishes when the temperature of probes S2 and S3 are greater than dt see also parameter H5 A Probes present 0 room probe only S1 1 room probe S1 and third probe S3 2 room probe S1 and defrost probe S2 3 all present S1 S2 and S3 4 control probe sent by master only on the slaves C Room probe calibration SD F 200 200 c oo d Enddefrostprobecalibration S2 C 2200 200 C oo t User terminal display management 0 not present 17 room probe S1 2 end defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe C calibration or offset of the room probe S1 The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S1 For example to decrease the temperature by 2 3 degrees set C 2 3 The offset may be set from 20 to 20 with precision to the tenth of a degree Default 0 0 no offset to probe reading us 2 measurement stability Defines the coefficient used to stabilise the temperature measurement Low values assigned to this parameter offe
62. n control for electronic expansion valves code MGE0000020 The following components also need to be added an NTC temperature probe for reading the evaporation temperature a ratiometric pressure probe for reading the evaporation pressure a motorised expansion valve a 24Vac 20VA safety transformer with 1A slow blow fuse on the secondary NOTE The following must only be modified by CAREL or other authorized specialist personnel Do not modify the parameters without knowing the effective operation of such P VALVE PARAMETERS AA Model of valve 0 CAREL E V P 390 steps BLACK stator 1 Sporlan 2 CAREL E V A 480 steps RED stator 3 Sporlan SEH 25 P2 Deadband 1 SC 0 00 c 00 ga 1 13191 1291 P4 PID proportional gain C 01 1000 50 PS PIDintegrationtim C 0 250 s 80 J Pe PID derivativeime r r rr i LL Li Low superheating threshold 10 0 PS Lowmpehesiginegsm me CI E Ls Par PA Enable transmission of pressure probe from master to slaves only on the master flag Type of refrigerant 0 R134a 6 R290 1 R22 7 R600 2 R404a 8 R600a 3 R410a 9 R717 4 R407c 10 R744 5 R507 11 R1270 Evaporation pressure probe field 0 1 5 bars 17 1 10 bars 2 0 35 bars Enable fast update of the valve parameters to Supervisor 0 No 1
63. n the large terminal code PSTOOLR200 Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 36 MasterCase 5 13 RTC Real Time Clock parameters RTC PARAMETERS Type Min Max UOM Def ViaLAN m Minutes of Istdefrost y SC 0 h2 Hour of 2nd defrost m2 Minutes of 2nd defrost CT CE a 3 Current weekday in Curent hour 0 75 Rus 9 t Current minutes SFE 0 59 mn 0 a2 m2 ii d8 Weekdayof8h defrost C h8 mE h8 ms td th t current day hour and minutes These can be modified as if they were type F parameters dx hx mx defrost times These are respectively the weekday hour and minutes set for the x th defrost For example to program a defrost for 3 30 on Monday morning set dx 1 hx 3 and mx 30 x 1 2 8 To disable a defrost set dx 0 The possible values and the corresponding meanings are as follows 0 No event cs Monday Sunday 8 From Monday to Friday Saturday and Sunday 10 Every day Example if dx 8 the defrosts will be performed from Monday to Friday at hx hours and mx minutes if dx 9 the defrosts will be performed Saturday and Sunday at hx hours and mx minutes if dx 10 the defrosts will be performed every day at hx hours and mx minutes Carel code 030220221 Rel 1 1 dated 18 11 04 37 MasterCase 5 14 P electronic valve EEV option code MGE0000020 The MasterCase controller is also available in a version with built i
64. nagement of immediate or delayed alarms the control of a door switch etc In addition a digital input known as the virtual input can be configured which is not physically connected but rather managed via the local network Continuous cycle The continuous cycle function allows the utility controlled to be forced on for a time set by parameter This function may be useful when requiring a rapid reduction in temperature even below the set point In circuit testing The MasterCase series is manufactured using the most advanced SMD technology All the controllers undergo in circuit testing to check the components installed Probes The instruments are designed to operate with NTC probes which offer greater precision across the rated operating range The pressure probes used are ratiometric All the probes can be supplied by CAREL Electronic valve An optional card soldered directly onto the main board of the MasterCase version MGE0000020 can be used to control the operation of an electronic expansion valve with stepper motor This allows the possibility to directly control the injection of refrigerant into the evaporator Consequently lower and more stable superheating values can be achieved as well as a higher evaporation temperature and consequently higher humidity and a more constant temperature in the showcase guaranteeing better conservation and quality of the products Watchdog Surveillance This device prevents the microprocess
65. ns on both devices after the post dripping phase with normal control enabled Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 24 MasterCase SKIP DEFROST d7 enable skip defrosts This parameter enables the algorithm by which based on the actual time elapsed during the last defrost the following defrost is performed or skipped The following rules are considered e the maximum number of consecutive defrosts that can be skipped is 3 that is after the third defrost skipped the following one is always performed e after switching the instrument on the first 8 defrosts are always performed e the number of events to be skipped is increased by a maximum of at a time e the manual defrosts started on the user interface or by digital input are always performed and counted e the function can only be used with the defrosts that end at temperature d0 0 or 1 d7 1 skip defrosts enabled d7 0 skip defrosts disabled This function is based on a very simple but very effective principle If the defrost lasts less than or equal to 65 of the time set for the parameter dP maximum defrost time the next defrost envisaged will be skipped When the following defrost is performed the check is repeated and if the outcome is the same then the following two defrosts envisaged are skipped and so on according to the criteria described above maximum 3 successive defrosts skipped As soon as the defrost time exceeds 65 o
66. nserted Two types of HACCP alarm are featured identified on the display with the following codes respectively HA if during operation the temperature measured is greater than the threshold represented by the sum of the parameters AH high temperature alarm threshold and St set point for a time greater than the sum of the parameter tr specific for the HACCP alarms and the parameter Ad temperature alarm delay the alarm HA is activated When the event occurs the following data are saved e hour minutes and weekday e type of alarm e maximum temperature reached after the activation of the alarm e duration of the alarm Maximum recording HF this is activated after a power failure if when power returns the temperature is higher than the threshold represented by AH St The following data are saved hour minutes and weekday type of alarm maximum temperature reached after the activation of the alarm duration of the power failure Carel code 030220221 Rel 1 1 dated 18 11 04 35 MasterCase When an HA or HF alarm is activated the display shows the codes HA or HF the alarm LED and the HACCP LED come on the buzzer sounds and the alarm relay is activated Pressing SET for one second deactivates the alarm relay and mutes the buzzer To delete the data saved enter Parameter programming mode set parameter Ad from 1 to 0 and confirm the operation or alternatively press the HACCP
67. nt ON is equal to the set point St differential rd Temperature alarm thresholds parameters AH AL and Ad These parameters are used to set the temperature thresholds above which the alarms are activated activation of the alarm relays and the buzzer on the terminal For these parameters too the value is RELATIVE to the set point AH high temperature alarm AL low temperature alarm Ad delay time from when the threshold is exceeded to the activation of the alarm in minutes The actual temperature thresholds are determined as follows high temperature threshold set point St AH low temperature threshold set point St AL The default values of these parameters are AH 0 and AL 0 alarms not enabled and the delay is Ad 120 minutes Main defrost parameters If the instrument is used for managing the defrost function a number of parameters need to be checked when starting the instrument in particular dI interval in hours between defrosts 1f set times with the RTC option are not used dP maximum defrost duration d0 type of defrost dt end defrost temperature 3 2 4 Loading the default values of the parameters During the installation of the instruments the operating parameters may be set incorrectly In other cases significant electromagnetic disturbance may cause errors on the instrument when saving the data with the display of the error EE data saving error In these and in
68. ntact connected to the input on the instrument Id This is an immediate external alarm as described by the alarm IA with the difference that the controller will activate the duty cycle setting function see the explanation for parameter c4 e Check the status of the digital input and the value of the corresponding parameter A1 A5 A8 CCM This 1s the signal corresponding to the periodical cleaning of the showcase and that is activated when the time set for parameter dM has elapsed see the description of parameters dM and dPM Case Clean Management function e Check the setting of parameters dM and dPM e Check the status of the digital input and the value of the corresponding parameter A1 A5 A8 Edc Loss of internal communication between the controller and the built in driver board electronic valve option In this case the alarm will cause the driver board to immediately close the electronic valve e try restarting the controller switch it off and on again e check that the driver is powered 24Vac connection from external transformer The fault signal is automatically reset when the problem is no longer present Edl Evaporation pressure sensor PE on the driver board out of range The valve is controlled by reading the superheating which in turn 1s the difference between the value measured by the pressure probe and the temperature probe NTC Sh If this probe is faulty or out of range the controller
69. obe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E0 Terminal probe error or communication error between the terminal and controller This error appears only if the display of the terminal probe is selected using the parameters t 5 or 7 5 on the interface or the remote display respectively It is cancelled if the display returns to one of the probes available e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument The error can also appear when there is no communication between the controller and the terminal even if the latter is in any case powered by the controller IA Immediate alarm from digital input e Check the status of the digital input and the value of the corresponding parameter A1 A5 A8 dA Delayed alarm from digital input e Check the status of the digital input and the value of the corresponding parameters A1 A5 A8 and A7 LO Low temperature alarm The control probe has detected a temperature lower than the set point by a value greater than parameter AL e check the parameters AL Ad St and AO The alarm is reset automatically when the temperature returns within the set limits see parameter AL HI High temperature alarm The control probe has detected a temperature higher than the set point by a value greater than parameter AH e check the parameters AH Ad
70. on disabled H3 1 ON OFF button enabled Default 1 H4 enable ON OFF from supervisor Enables or disables the remote ON OFF from the supervisor This parameter has priority over the previous one and consequently if the ON OFF from supervisor is enabled H4 1 the ON OFF button on the terminal is disabled irrespective of the value of H3 H4 0 remote ON OFF from the supervisor disabled H4 1 remote ON OFF from the supervisor enabled Default 0 H5 AUXI configuration This is used to configure the auxiliary output as a repeat of any one of the other outputs Specifically H5 0 output disabled H5 1 compressor output repeats the operation of the main control output symbol S y H5 2 master slave network compressor output this configuration must only be used on the Master unit The output will be active while any of the units in a master slave network LAN have a cooling request in progress H5 3 light and or curtain output H5 4 fan output H5 5 hot wire output rail heat the output is always active except for when the control is in standby H5 6 alarm output H5 7 evaporator 1 defrost output manages a second defrost output that works in parallel with the main defrost output H5 8 evaporator 2 defrost output in association with the setting of parameter 9 1 defrost with probe S3 a second defrost output can be managed independently of the main output and related
71. ontrol always off Carel code 030220221 Rel 1 1 dated 18 11 04 22 MasterCase cc continuous cycle duration This 1s the time in hours that the controller is operated continuously for so as to lower the temperature even below the set point This function is started manually by pressing the buttons on the user interface If cc 0 the continuous cycle is disabled The controller exits the continuous cycle procedure when the time set for the parameter cc has elapsed or alternatively when reaching the minimum temperature threshold set using the parameter AL minimum threshold set point AL Default 4 hours c8 Start control delay from the opening of the valve This parameter is used to set the number of seconds that must elapse between the opening of the electronic valve in models code MGE0000020 and the activation of the compressor output start control The purpose is to avoid above all in non centralised systems with compressor on board that the time required for the electronic valve to open is too long for the capacity of the compressor implying the rapid emptying of the suction line and the consequent safety shutdown due to low pressure Any auxiliary output configured as a solenoid valve parameters H5 and or H6 9 will work in parallel with the electronic valve that 1s will open before the activation of the compressor output by the set time for this parameter Default 5 seconds c6 alarm bypass after contin
72. oom probe S1 2 end defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe AO Temperature alarm return and fan activation differential see C 0 1 20 0 C 20 parameter F1 Al 5 Digital input configuration see note 1 0 disabled 1 immediate external alarm 2 delayed external alarm 3 enable defrost 4 start defrost from external contact 5 door switch 6 ON OFF remote 7 night time curtain switch 8 duty setting activation 9 door switch with control active 10 case cleaning CCM A7 __ Alarm delay from digitalinput Ax 2 C 0 Lr a Ad Temperaturealarm delay C 0 180 min 10 e A epee aan tonen ff 00 00 MEM F riers re Ar Enable the master to signal the alarms on the slaves only on the master Carel code 030220221 Rel 1 1 dated 18 11 04 44 MasterCase c SAFETY TIME PARAMETERS Type Min Max UOM Def Via LAN cO Startcontrol delay from powerup C O 15 min 0 e cl Minimum time between two successive starts C 0 15 min 0 e 2 Minimum OFFtime 1 1 C O I mn 0 e 3 MiimumON me C 0 15 mm 9 c4 Safety control Duty cycle setting function R EL 100 always ON c6 Temperature alarm bypass time after continuous cycle C 0 15 hours 2 e c8 Start control delay from the opening of the valve C 0 120 S 5 e cc Continuous cycle duration
73. or from losing control of the unit even in the presence of significant electromagnetic disturbance In the event of abnormal operation the watchdog re establishes the initial operating status Electromagnetic compatibility The instruments comply with the EU standards on electromagnetic compatibility CE mark and ISO 9001 certification The quality and the safety of the MasterCase series instruments are guaranteed by CAREL s ISO 9001 certified design and production system and by the CE mark on the product Carel code 030220221 Rel 1 1 dated 18 11 04 4 MasterCase 2 Layout of the hardware 2 1 Meaning of the inputs and outputs i i ju BE z 2g to amp Ei Ingressi digitali S e ri o programmabili O 3 8 Programmable a G digital inputs O E 3 X d E T Ambient S1 A l T Defrost Pressione di evaporazione S2 Evaporation pressure l l T Products S3 NTC Temperatura di evaporazione SI o Z Evaporation temperature ed ae LM TAIHS cM The colours refer to CAREL cables codes PSTCON0300 and PSTCONI000 The colours refer to CAREL cables code SPKC Digital inputs inputs from voltage free contacts with 8mA closing current connection with removable terminals for wires from 0 25 to 2 5mm2 maximum length of the cables 30m for standards compatibility surge the function of the digital inputs can be programmed using the parameters multifunction inputs G DI1
74. oss F o 192 hows 8 m NE YS N lt m Maximum defrost time 1 30 0 d0 type of defrost Establishes the type of defrost 0 electric heater end by temperature or maximum safety time timeout 1 hot gas end by temperature or maximum safety time timeout 2 electric heater end by time 3 hot gas end by time Default 0 electric heater defrost end by temperature lt Carel code 030220221 Rel 1 1 dated 18 11 04 23 MasterCase d2 type of defrost control Determines whether the instrument in a LAN at the end of the defrost waits for an end defrost signal or not d2 0 the instrument completes the defrost without waiting for the stop signal stand alone instrument d2 1 the instrument waits at the end of the defrost for the stop signal which is usually sent by the master in a LAN of multiplexed cabinets Default 1 d3 operating time with evaporator temperature below 1 C before starting a defrost Determines how long the controller operates solenoid valve output compressor active when the temperature measured by probe S2 1s below 1 C after which a defrost is performed To disable this function set the parameter to 0 For temperature values above 1 C and or when the controller is inactive the time is not counted Obviously the time is managed by an incremental counter that is set to zero only after the set value has been reached and the corresponding defrost per
75. r C Hn 900 C Enable alarm Ed defrost ended by timeout 0 No 1 Yes 3 0 Enable maximum and minimum temperature recording 0 No 1 Yes r6 Night time control with third probe S3 E 1 night time control on third probe S3 0 night time control on virtual probe Maximum temperature recorded in the interval rt read only parameter Minimum temperature recorded in the interval rt read only parameter Time elapsed since the start of the maximum and minimum temperature recording interval read only parameter rd differential Establishes the value of the differential used in the temperature control The operation of this value can be described as follows temperature gt set point St differential rd gt controller ON temperature lt set point St controller OFF The following figure illustrates the concept Direct freddo cooling ta on actuator GEE Set point Default 2 0 rl Minimum temperature setting Determines the minimum value that can be set for the set point This parameter prevents the user from setting a set point that is lower than the value indicated by rl Default 50 0 r2 Maximum temperature setting Determines the maximum value that can be set for the set point This parameter prevents the user from setting a set point that is higher than the corresponding value Default 90 0 r3 enable end defrost by timeout signal Enables the signal indicating the end of t
76. r a prompt response of the sensor to variations in temperature the reading 1s however more sensitive to disturbance High values on the other hand slow down the response but guarantee greater immunity to disturbance meaning a more stable reading Default 1 4 virtual probe Defines a non existent probe used for the normal control functions This parameter determines the weighted average used to calculate the reference control probe value based on the reading of the room probe S1 and the third probe S3 The formula is the following viris ade 100 4 x 4 x 3 100 If set to 0 the virtual probe coincides with the room probe S1 if set to 100 the virtual probe coincides with the third probe S3 If control is based on the virtual probe value of parameter 4 between 0 and 100 the breakage of one of the two probes automatically moves control to the other probe Default 0 room probe S1 Carel code 030220221 Rel 1 1 dated 18 11 04 18 MasterCase 6 decimal point Enables or disables the display of the temperature with resolution to the tenth of a degree in the range between 9 9 and 99 9 for the version with Small display and between 99 9 and 999 9 for version with Large display 0 display without decimal point 1 display with decimal point Default 1 decimal point used t display on user interface Selects the probe reading displayed on the interface terminal 0 Not present 1
77. r kit for MasterCase basic Removable connector kit for MasterCase EXV Hardware programming key Hardware programming key with external 230 Vac power supply DESCRIPTION Large terminal 8 buttons with red display IR receiver buzzer Small terminal 3 buttons with red display IR receiver buzzer 1 input for NTC probes 2 digital inputs Red display 1 input for NTC probes 3m connection cable 10m connection cable MasterCase 2 3 User interface The MasterCase uses the series of standard PST terminals as the user interface This series as well as being the same used by other Carel instruments consequently allowing a reduction in product codes offers various solutions small terminal with 3 digits and 3 buttons code PST00SR300 large terminal with 4 digits and 8 buttons code PSTOOLR200 remote display with 3 digits code PSTOOVR100 Important the remote display will only work if one of the two terminals is also connected Each button is backlit by a LED to signal the status of the unit outputs active alarms etc The terminals are not required for the operation of the MasterCase but rather are used to program the controller The terminals can be connected live that is when the instrument is on without creating problems in operation 2 3 1 Functions of the buttons and LEDs on the PJ Large terminal PSTOOLR200 2 4 6 Button red LED Normal operation pressed for 5 seconds eliminates the H
78. ration parameter parameter Ar 1 All the masters are enabled for this function as default If a terminal or display is not essential for the operation of the unit and indeed in a LAN the slave can operate perfectly without such user interface this function is particularly useful for centralising the alarm management functions on the master If the master detects an alarm on a slave unit probe error high or low temperature error etc the display shows the signal nX alternating with the display of the temperature where X 1 2 3 5 the LAN address of the slave in question When the event occurs the alarm relay on the master is activated 2s The nX signal on the master unit can be inhibited for one minute by pressing D 4 3 Transmission of control signals and probe readings The particularly reliable and fast structure of the LAN 16 bit CRC error checking allows the value read by the control probe and or pressure probe to be sent across the network allowing savings in terms of both materials installed and installation time The transmission of the pressure probe signal must be enabled on the master using the parameter PA and the slave must be enabled to receive the signal suing the parameter Pb The control probe temperature sent by the master is set on the slaves by setting parameter A 4 Carel code 030220221 Rel 1 1 dated 18 11 04 14 MasterCase 5 Setting the parameters The parameters have been grouped
79. rature that 1s the air that comes into contact with the product that is dangerously low SL1 minimum temperature for probe S1 If the temperature read by probe SI falls below the minimum value SL1 the controller is stopped and an alarm is activated code displayed gt L01 When the temperature increases by 2 C above SL1 the controller restarts and the alarm is reset If the value of the parameter SL1 is equal to the maximum limit 90 0 C and or the parameter 4 is set to 0 the function is disabled Default 90 0 Carel code 030220221 Rel 1 1 dated 18 11 04 34 MasterCase 5 12 t HACCP parameters Cie RA HACCP alarm delay min 0 HACCP disabled Type of HACCP alarm read only parameter 0 no alarm 1 HA alarm 2 HF alarm Weekday of the most recent HACCP alarm read only parameter i TT NE e a Minutes of the most recent HACCP alarm read only parameter C Maximum temperature reached during the most recent 50 0 50 0 HACCP alarm read only parameter Duration of the HACCP alarm read only parameter 0 hours 0 Delete the data saved and the HACCP alarm ei dle 1 9 HACCP This function allows advanced control of the operating temperature and the recording of any faults due to power failures or increases in the operating temperature for various reasons faults severe operating conditions user errors etc This function can only be activated on the controllers with the RTC option i
80. ring dripping dd NE TENE Fd Fanoff meduringpostdripping F 0 15 mi 1 Carel code 030220221 Rel 1 1 dated 18 11 04 45 MasterCase CONFIGURATION PARAMETERS Configuration of output AUXI 0 output disabled 1 compressor output 2 master slave network compressor output 3 light and or curtain output 4 fan output 5 hot wire output 6 alarm output 7 evaporator 1 defrost output 8 evaporator 2 defrost output 9 ON OFF valve output solenoid H6 Configuration of output AUX2 hot wire C for values see H5 Configuration of compressor output only on the master H7 1 compressor 2 master slave network compressor Configuration as master In 1 or slave In 0 E qe o dee i Sn Number of slaves only on master C 5 0 LAN not present TI Minimum set point value allowed by nes C soo 2 C soo Maximum set point value allowed by the user pc n 900 c 900 e 0 No 1 Yes a8 4 Night time set point deviation from setpoint C 200 200 C 30 e Enable maximum and minimum temperature recording C 1 fla 0 No 1 Yes i 0 l r6 Night time control with third probe S3 1 night time control on third probe S3 C flag 0 e 0 night time control on virtual probe Differential hysteresis Minimum temperature recorded in the interval rt read only Time elapsed since the start of the maximum and minimum temperature recordin
81. s operating environments and connections The following conditions represent correct installation 1 do not install the instrument in environments with the following characteristics wide and rapid fluctuations in ambient temperature temperature and relative over the allowed limit exposure to direct pressurised jets of water high levels of magnetic and or radio frequency interference e g from transmitting antennae 2 use cable ends suitable for the corresponding terminals Loosen each screw and insert the cable ends then tighten the screws When the operation is completed slightly tug the cables to check that they are sufficiently tight 3 separate as much as possible the signal cables from the cables carrying inductive loads and power cables to avoid possible electromagnetic disturbance Never insert power cables including the electrical cables and probe signal cables in the same conduits Do not install the probe cables in the immediate vicinity of power devices contactors circuit breakers or similar 4 reduce the path of the probe cables as much as possible and avoid spiral paths that enclose power devices To extend the probe cables use cables with a minimum cross section of at least 0 5mm7 5 the cables connected to the contacts on the controller must be rated for the maximum operating temperature determined by considering the maximum room temperature envisaged added to the heating up of the controller itself equal to 20 C 6
82. ssure reached during normal operation excluding transitory conditions Default 0 Carel code 030220221 Rel 1 1 dated 18 11 04 40 MasterCase SMART THERMOSTAT This function allows using a parameter that acts on the superheating value measured the typical swings in temperature due to the ON OFF temperature control using the solenoid valve to be reduced or even eliminated In practice the closer the temperature gets to the set point the further the controller decreases the cooling capacity of the evaporator by closing the expansion valve In the best cases the real temperature of the showcase thus becomes very stable around the set point without the solenoid valve ever closing but rather by exclusively controlling the expansion of the refrigerant OSH superheating offset The parameter OSH is added to the superheating value by parameter P3 internal operation of the software proportionally to the difference between the controlled air temperature and the temperature set point The lower the difference the more weight the deviation determined by OSH will have The consequent increase in the superheating set point will reduce the opening of the valve thus preventing total closing due to the reaching of the threshold and allowing the system to operate around the desired temperature set point The function is active only in a band of temperatures between the set point and half of the set differential This function cannot be use
83. sterCase vx Auxiliary output AUXI L gt Line 12A 250Vac Resistive Load N gt Neutral Note for all the outputs removable screw terminals for cables with cross section from 0 25 to 2 25 mm Electronic expansion valve maximum length of the cables 10m I GREEN RR d RED 4WHITE W2 2 BLACK Valve Motor External backup batter gt Featured but currently not managed 24Vac 20V A 0 5A transformer gt At the transformer 24Vac output gt At the transformer 24Vac output Superheated gas temperature probe NTC Sh Models for electronic valve only code MGE0000020 G Tsh NTC temperature probe for superheated gas evaporator outlet P E Evaporation pressure Models for electronic valve only code MGE0000020 for distances greater than 10m use shielded cable 2 wires plus shield connected to earth G Earth green P gt Signal white Vp gt Power supply black The colours refer to CAREL cables code SPKC RS485 driver gt Featured but currently not managed PWM gt Featured but currently not managed Serial line connection Supervisor Connector for optional RS485 board to interface with supervisor removable screw terminals for cables with cross section from 0 25 to 2 25 mm serial speed envisaged 19200 bit s G gt Earth T gt Connection to the positive of the RS485 serial line T Connection to the negative of the RS485 serial line C
84. sumed value not the real one as physical phenomena such as strong electromagnetic disturbance mechanical blockages inside the valve and so on may mean a lack of control over the steps of the valve bringing it to unknown positions Read only parameter Default PL evaporation pressure read only parameter This represents the value read by the ratiometric pressure transducer and is expressed in bars Read only parameter Default CP1 initial valve position number of steps This is used to set the initial position where the valve moves to whenever the controller is started This parameter in combination with parameter c8 on one hand allows the rapid emptying of the suction line and the consequent stopping due to low pressure in non centralised systems with on board compressor and on the other to pre position the valve for more ready resumption of control Default 350 steps Pdis disable PID This parameter can be used to disable the PID control of the electronic valve and allow manual control see parameter Pmp Disabling the PID Pdis 1 will completely close the valve which can then be opened or closed only by manual control using the parameter Pmp described below Pdis 0 PID control enabled valve controlled automatically Pdis 1 PID control disabled valve in manual control Default 0 Pmp manual valve position This 1s used to move the valve to the desired position of opening by sett
85. the control functions are stopped and the inputs and outputs deactivated The function is active only if one of the digital inputs is set as a case cleaning input Ax 10 dM time between two successive cleaning signals This parameter is used to set the time in hours range 1 1000 between one cleaning signal and the next The time is counted starting from when a digital input is set Ax to 10 or when the instrument is switched on and one of the inputs has already been set to that value When the time has elapsed the instrument displays the message CCM and the buzzer sounds The buzzer can be muted in the normal way or by opening the corresponding digital input Default 1 hours dPM cleaning signal duration This parameter is used to set the time in minutes range 0 60 for the duration of the cleaning signal When the time dM has elapsed the controller awaits the opening of the digital input associated with this function and only if the input remains open for a time at least equal to dPM will the signal on the display CCM be cancelled and unless already deactivated manually the buzzer muted At this point the counter dM will start again for the following signal Otherwise the buzzer will sound again and the signal will remain on the display Default 0 minutes dP maximum defrost duration Determines the duration of the defrost in minutes for defrosts by time d0 0 or 1 For defrosts by temperature d0
86. the display Default 1 hours d9 priority of the defrost over the safety times and the activation of the control Cancels the safety times set using the parameters in family c when starting the defrost 0 the protection times are observed 1 the defrost has higher priority and the times set with the c parameters are ignored Default 0 dd dripping time This parameter is used to set the time in minutes following a defrost in which the controller and the evaporator fans see parameter F3 are stopped so as to allow the evaporator to drip Default 2 minutes dI interval between cyclical defrosts The parameter dI manages the so called cyclical defrosts in that they are repeated after the number of hours set for the parameter The time is reset every time a defrost is performed including non cyclical defrosts If the time dI is equal to 0 dI 0 the cyclical defrosts are disabled In a LAN a cyclical defrost on the master also starts a defrost on the slaves connected network defrost Default 8 hours CASE CLEAN MANAGEMENT This function is used to manage the periodical cleaning of the showcase By setting two specific parameters dM and dPM and selecting a digital input see parameters AT A5 the instrument can be programmed to signal the need for cleaning and oblige the user to intervene The instrument enters standby status only after the opening of the digital input in which
87. the values of other parameters Saving the new values 2 e press the SET button D for five seconds per save the new value values entered and exit the parameter modification procedure gt A Important only pressing D permanently saves the temporary values entered during the operation A If the instrument is switched off before pressing for five seconds all the changes made and temporarily saved will be lost Exiting the programming procedure To exit the procedure without modifying the parameters do not press any button for at least 30 seconds exit by TIMEOUT In this way the instrument returns to normal operation without making any modifications to the parameters Carel code 030220221 Rel 1 1 dated 18 11 04 15 MasterCase 5 1 Classification of the parameters The parameters as well as being divided by TYPE are grouped into logical categories identified by the first letter or symbol The following table shows the categories and the corresponding letters symbols r temperature control parameters evaporator fan management parameters general configuration parameters addresses enabling etc clock and HACCP parameters A alarm management parameters electronic valve management parameters 5 2 Password parameters PP access level password The first parameter encountered when entering programming mode is a password parameter that allows access to all the parameters of the instrument if the passwor
88. tivated for at least the time set CX ee Pr pe xS ON richiesta inserimento l insertion request Vili int OFF ON compressore compressor p 4 RR a Ses OFF 7m Default 0 minutes c4 Duty cycle setting function safety control If the control probe error rE alarm occurs that is probes S1 and or S3 faulty this parameter allows the controller to keep operating the cooling utility thus reducing or limiting any damage while awaiting the elimination of the fault In practice as there is no longer any temperature control the controller operates in cycles with an ON time equal to the value assigned to the parameter c4 in minutes and a fixed OFF time of 15 minutes Two values of c4 bring about specific situations c4 0 control deactivated always OFF c4 100 control always active always ON If control error occurs while the controller is in a defrost or continuous cycle it instantly exits the current status and goes into duty setting mode It should be remembered that in the event of a control error on a master slave unit local or manual defrosts and the continuous cycle functions are no longer available A master with a control probe error rE may on the other hand manage the defrosts on the slaves served network defrost After the Duty Cycle Setting the temperature alarms are bypassed for 5 minutes OFF 15 min compressore compressor c4 Default 0 c
89. to reduce the error that is the difference between the actual superheating value read and the value set with the set point P3 In practice it affects the number of steps that the valve can complete per unit of time The value is proportionally opposite to the desired effect that 1s low values indicate a higher speed and vice versa The integration time internal value Ti is expressed in seconds if the parameter is set to zero the integration action is disabled Default 80 seconds P6 PID derivative time The value set for this parameter allows the PID part of the valve control to react to variations both sudden and not in the superheating value In practice there is a variation in the opening or closing of the valve that increases as the variation in the superheating value per unit of time increases proportionally to the set value The derivative time internal value Td is expressed in seconds if the parameter is set to zero the derivative action 1s disabled Default 0 0 seconds P7 Low superheating threshold To prevent too low superheating values causing the return of liquid into the compressor or considerable instability in the system swings this parameter can be used to define a low superheating temperature threshold below this value an additional function to PID integration control starts with a programmable constant see parameter P8 below In practice the reaction speed of the valve 1s increased Defa
90. ult 4 0 C P8 low superheating integration time Below the threshold set with the previous parameter P7 the electronic valve protection function will operate with the integration constant set with this parameter In substance the reaction speed of the valve will be increased with this parameter allowing lower values than those that can be set for normal control see P5 Default 150 seconds 10 Carel code 030220221 Rel 1 1 dated 18 11 04 39 MasterCase PA enable propagation of evaporation pressure probe on local network only on the master In the event of a multiplexed showcase with the controllers connected in master slave configuration a single evaporation pressure probe can be connected to the Master and the value sent across the LAN to the slaves so that all the multiplexed islands use the same probe PA 0 propagation disabled PA 1 propagation enabled Parameter to be set only on the master Default 0 Pb enable evaporation pressure probe via the local network only on the slaves This enables the reception on the slaves of the pressure probe value transmitted by the master via the LAN Pb 0 use the local pressure probe Pb 1 use the pressure probe transmitted by the master via LAN Parameter to be set only on the slaves Default 0 e _ a e a o e a a mom m m m m lt _ i superheat
91. uous cycle This is the time in hours that the low temperature alarm is ignored that is not activated after a continuous cycle The low temperature alarm will be generated only if after a time equal to the sum of c6 in hours Ad in minutes where Ad is the general delay for the temperature alarm the temperature is still below the low temperature threshold set point AL Default 2 hours 5 6 d defrost management parameters d DEFROSTPARAMETERS Type Min Max UOM Def Via LAN dO Type of defrost 0 electric end by temperature time as safety 1 hot gas end by temperature time as safety C 0 3 0 e 2 electric end by time 3 hot gas end by time d2 Type of control for LAN defrost 0 start only C 1 flag 1 1 start and stop d3 Operating time with temperature of S2 lesser than 1 C before C 192 eee starting a defrost Defrost when switching controller on Yes No GI o X E Detrost start delay from controller power up or on from cfo iso min o J e digital input Display management during defrost 0 display the temperature alternating with the symbol dF C flag 1 hold on last temperature displayed e Enable skip defrost function C 9 1 fia 9 Temperature alarm bypass time after defrost andlor open door F 0 Priority of defrost over protection times par c C 0 Drippingime F 0 mtervalbetweentwosuccessivedeft
92. uring MOP lose vee c 9 255 wie 109 Pi _ MOP fneion scia del T S 19 28 fs E PM4 Maximum superheated gas temperature 50 0 80 0 80 0 BIDEN ee Po2_ Valve opening percentage rexLonlypsameer C o 49 Pot Rupentesta gus temperature feud only parameter I o 1 Po4 Saturated evaporation temperature read only parameter C 0 No Yes e a etitetatat VISIBLE ONLY TO SUPERVISOR Valve position number of steps read only parameter Sv 0 130000 stes I PL _ Evaporation pressure read only parameter Sv ba CPI Initialvalve position number of steps Sv 0 3000 steps 350 Pdis DisablePID Sv 0 Mea Jo Pmp Manual valve position Sv jo 3000 steps Jo TT INC dl E E ON TRAN HACCP alarm delay min 0 HACCP disabled Type of HACCP alarm read only parameter 0 no alarm 1 HA alarm 2 HF alarm Weekday of the most recent HACCP alarm read only parameter tH X Hour ofthe most recent HACCP alarm read only parameter ro AL Minutes of the most recent HACCP alarm read only parameter mi Maximum temperature reached during the most recent uli HACCP alarm read only parameter ue lw E UM Duration of the HACCP alarm read only parameter Lx d Delete the data saved and the HACCP alarm Carel code 030220221 Rel 1 1 dated 18 11 04 47 MasterCase RTC PARAMETERS Type Min Max UOM Def ViaLAN
93. ve and the master e Check the electrical connections on the LAN e check the settings of the parameters In Sn and H0 e these network signals on both master and the slave are reset automatically as soon as communication is re established between the master and slave ul u5 on master Loss of communication with slave 1 5 for at least one minute e Check the electrical connections on the LAN e check the settings of the parameters In Sn and H0 e these network signals on both master and the slave are reset automatically as soon as communication is re established between the master and slave n1 n5 on master slave nl n5 with local alarm e Check the status of the slave that is signalling the alarm and check the alarm code on the same di d5 on master Parameter download failed to unit u S1 uS5 e Check the wiring on the LAN e repeat the download procedure Carel code 030220221 Rel 1 1 dated 18 11 04 52 MasterCase 8 Technical specifications 230Vac 15 10 50 60 Hz Electronic valve power supply 24Vac 24Vac 20VA transformer available only on code MGE0000020 terminals 4 inputs for NTC probes Type of probe measurement accuracy Carel standard NTC 10 W 25 C 1 C 50T90 58T195 F resolution 0 1 C Digital inputs 5 for non optically isolated voltage free contacts open closed contact 8Vdc 8mA typical LAN serial connection two w
94. wing explains the above function t gt temporizzatore timer sbrinamento defrost Poe unit 4 unit 1 d5 sbrinamento defrost E u s ud unit 2 unit 2 d5 sbrinamento defrost Ls unitas unit 3 Richiesta sbrinamento Defrost request KEY t impulse from the timer to start the defrost the minimum duration must be 0 5 seconds dP 1 maximum defrost duration unit 1 d5 2 defrost delay from external contact for unit 2 This must be greater than dP 1 otherwise the defrosts will overlap Similar meanings for d5 3 and dP 3 Carel code 030220221 Rel 1 1 dated 18 11 04 28 MasterCase AI A5 A8 5 door switch This function is used to manage the door switch on a cold room When the contact door is opened the control functions and the fans are stopped and the light output is activated When the contact closes the unit starts again in the previous operating mode delaying any temperature alarms for a number of hours equal to the value of the parameter d8 If the door and consequently the contact remain open for a time greater than d8 the display shows the alarm code dr and the controller returns to the operating mode it was in prior to the opening of the door Specifically e ifthe controller was in Duty Setting mode it returns to Duty Setting e if the controller was in continuous cycle mode it returns to continuous cycle mode and the maximum duration of the continuous cycle is extended by the time the door
95. x hours hSd Night time set point end time hours SLI Absolute minimum temperature probe S1 50 0 SL1 90 C function disabled St temperature set point Represents the reference control temperature See the paragraph dedicated to this parameter Default 20 0 Stn select night time set point mode Parameter Stn can be used to configure the automatic changeover of the set point The following values are available Stn 0 no night time set point No digital input programmed as a curtain switch Ax 7 no action Digital input programmed as a curtain switch Ax 7 gt when the status of the digital input changes only the light output will be activated action propagated across the LAN from the master to the slaves No variation of the set point Stn 1 set point change from digital input No digital input programmed as a curtain switch Ax 7 gt no action Digital input programmed as a curtain switch Ax 7 gt when the status of the digital input changes the following will occur activation of the light output action propagated across the LAN from the master to the slaves change in the set point according to parameter r change of control to the third probe 83 according to parameter r6 Carel code 030220221 Rel 1 1 dated 18 11 04 33 MasterCase Stn 2 change from RTC If the controller is fitted with the RTC option the set point can change from the daytime to the night time va

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