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MasterCase User Manual

1. 2 minutes dI interval between cyclical defrosts The parameter dl 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 dI is equal to 0 dI 0 cyclical defrosts are disabled In a LAN a cyclical defrost on the Master also starts a defrost on the Slaves connected network defrost Def 8 hours 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 2 or 3 dP represents the maximum safety duration of the defrost that is the defrost will in any case stop after the time dP even if the end defrost temperature has not been reached Def 30 minutes dt end defrost temperature This parameter is used to set the evaporator temperature measured by probe S2 at which the defrost is 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 Def 4 CASE CLEANING 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
2. PRELIMINARY VERSION 24 January 2003 LEGGI E CONSERVA gt QUESTE ISTRUZIONI 4 READ AND SAVE THESE INSTRUCTIONS CARE Technology amp Evolution CONTENTS 1 Tntroduction i reisssrsevsesvesare vs sessdser 1 1 Main characteristics of the MasterCase 2 Layout of the hardware sesesssensensensensenvensensensensennvenesnesnnennennennennennsensensenennenneensensensennensesnesnesnnsnnennennennenneenesnennennennenneunennsensenseenessesnnennee 7 Dili gt Meaning of theinputsand outputsaassssarasian dere beste 7 2 2 Codes bf the models And ACCESSOS sieer a develo duhesodeh a vudedeesdevdeteoadeedecdheesiendesdeebesdeseeteo sdeededune dat 10 2 3 User interface aude tres ia EEE sch tuk clatadessescdecaeben Ri Teese tens ch bel CREERANNO IO ear 10 2 3 1 Functions of the buttons and LEDs on the PJ Large Terminal PSTOOLR200 c scscscssssscssceseesesseeeeeeeeeeeeeeneeeeees 10 2 3 2 Functions of the buttons and LEDs on the PJ Small Terminal PSTOOSR300 cccccsscscssessesesesessesssesesessseesesseseees 11 3 Installation eesesesessersvensneneerensvenevnsvensvesrensnensensnsnensvnsvenevensensvensenenenensenvensvennensvsneensneveesensvenevnseene 12 Zi Electrical CONNEC ons sessioissa rniii i EERTE TIA NESTE naro 12 32 Configurme the controllets af TG 12 3 2 1 Parameters relating to the hardWare s ssrsvrnrnvsronrnrnrerenrnrnrnrenrnrnrsrrnrnenrsnenrnrsrsrrnrnerrenrnenesrenrnenessrnenenesrensn
3. 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 24Vac 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 Configuring the controllers 3 2 1 Parameters relating to the hardware When configuring an instrument that has just be installed there are a number of parameters that are strictly related to the hardware connections These parameters are Al A2 A5 configuration of the digital inputs A presence of the probes 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 pi type of valve PIC type of pressure sensor PHC type of refrigerant used in the system only for models with the electronic valve control code MGE0000020 For the meaning and configuration of the parameters see the corresponding section further on in the manual 3 2 2 Stand alone local network LAN and supervisor configuration There are thr
4. dP e Check the efficiency of the defrost devices Ed1 FLASHING Evaporation pressure sensor PE on the driver board out of range The valve is controlled by reading the superheating which in turn is 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 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 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 Ed2 FLASHING Superheating temperature sensor NTC Sh on the driver board out of range See the description of the alarm Ed1 e check the electrical connections Ede FLASHING 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 pre
5. 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 Heavy vibration or shocks Exposure to continuous water sprays Exposure to corrosive or pollutant gases e g sulphur or ammonia fumes saline mist smoke so as to avoid corrosion and oxidisation Strong magnetic and or radio interference therefore avoid installing the unit near transmitting antennae Exposure of the controllers to direct sunlight or the elements in general DDE ND 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 channels 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 the bulb placed vertically to assist the draining of any condensate
6. D uxiliary AUX1 L gt Line 12A 250Vac Resistive Load N gt Neutral Note for all outputs removable screw terminals for wires with a cross section from 0 25 to 2 25mm Valve maximum length of the cables 10m 1RED DEI L ASSE 2WHITE W2 4BLACK Valve Motor Battery B gt Positive 24Vdc B gt Negative 24Vac 0 5 Ampere gt To 24Vac transformer output gt To 24Vac transformer output NTCSH G Tsh gt NTC superheating sensor P E evaporation pressure for distances over 10m use shielded cables 2 wires plus shield connected to earth G gt Ground P gt Input signal Vp gt Power supply RS485 driver Currently not supported PWM Currently not supported Supervisor network Connector for optional card with RS485 driver for interfacing with the supervisor removable screw terminals for wires with cross section from 0 25 to 2 25mm serial speed envisaged 19200 bit sec G gt Ground T gt Connect to positive Carel Supervisor RS485 serial line T gt Connect to negative Carel Supervisor RS485 serial line Terminal three wire serial connection maximum length 10m power supply supplied by the controller 24 35Vdc 1 5W max Vs gt Power supply T gt Data signal G gt Ground LAN Local Area Network network connection to other controllers max length 10m removable screw terminals for wires with cross section from 0 25 to 2 25mm T
7. In numerical terms Control temperature gt Set point St AH gt HIGH TEMPERATURE ALARM HY Changing the set point therefore automatically changes the alarm threshold The point at which the alarm is deactivated is as follows Control temperature Set point St AH A0 When the alarm condition is no longer present the corresponding audible signal and message the display are automatically cancelled Def 0 0 AL Low temperature alarm This value is related to the set point It indicates 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 Set point St AL A0 When the alarm condition is no longer present the corresponding audible signal and message the display are automatically cancelled It should be remembered that the low temperature alarm threshold is also used in the continuous cycle see parameter cc as the minimum value for stopping the function Def 0 0 NOTE the temperature alarms are not generated in the following cases during a defrost during th
8. see parameters A1 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 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 Def 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 followi
9. the virtual probe coincides with the room probe S1 if set to 100 the virtual probe coincides with the third probe S3 Def 0 room probe S1 virtual probe 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 Def 1 decimal point enabled t display on user interface Selects the probe reading displayed on the interface terminal 0 Not present 1 Room probe S1 2 End defrost probe S2 3 Third probe 3 S3 4 Virtual control probe depends on the parameter 4 5 Terminal probe if present Def 4 displays the virtual probe 7 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 S3 4 Virtual control probe depends on the parameter 4 5 Terminal probe if present Def 0 display not present 8 third probe calibration The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S3 For example to decrease the temperature by 2 3 degrees set 8 2 3 The offset may be set from 20 to 20 with precision to the tenth of a degree Default
10. Curenthou pr 0 fo Curentminutes TETI Valve model 0 Carel E2V 1 390 steps 1 Sporlan 2 Carel E2V 2 480 steps PI Superheating setpon S 00 PA Enable MasterprobeonSves pa 0 Pb PressureprobefromMaser pc 0 Pc Delay pressure poe alarm ee Refrigerant type 0 R134a 1 R22 2 R404a 3 R410a 4 R407c Evap pressure probe type Superheating offset Note 1 Value of Operation oo Ties J 1 immediate external alarm rop a gE open alarm active delayed external alarm Contact open alarm active Delay see parameter A7 3 enable defrost Contact open defrost not enabled start defrost The defrost starts when the contact closes It can be used for real time defrosts Simply C connect a timer to the digital input and select A4 4 To disable the cyclical defrosts generated by the controller automatically set dI 0 door switch Contact open door open When the door opens the compressor and the fans are turned off If the door remains open longer for than d8 the controller restarts normal operation compressor and fans ON if required C remote ON OFF Contact closed ON Contact open OFF curtain switch Contact closed curtain down If the input is selected as a curtain switch the controller modifies the set point when contact closes adding the value of the parameter r4 If r4 3 0 default value the set point is increased by 3 degrees from the value used when the curtain is r
11. IT PayofTisi de PG hi Hour of fist defrost eo mi Minutes of hour h1 on the current day Tor starting the defrost CJ 0 AAAA A Ty mm h2 Hour of the second defrost c 0 m Minutes of hour h2 on the current day for starting the defrost c 0 Q Hour of the eighth defrost m8 Minutes of hour h8 on the current day for starting the defrost cC 0 5 min td th t current day hour and minutes These can be modified as if they were type F parameters FER o i o A d2___ Payoftheseconddefrost_ GJ 0 Gai E o en o ii I dx hx mx are respectively the weekday hour and minutes set for the x th defrost For example to start a defrost at 3 30 a m on Monday set dx 1 hx 3 and mx 30 x 1 2 8 To inhibit the defrost set dx 0 If dx 8 the defrosts will be performed from Monday to Friday at hour hx and minutes mx If dx 9 the defrosts will be performed on Saturday and Sunday at hour hx and minutes mx If dx 10 the defrosts will be performed every day of the week at hour hx and minutes mx 5 14 Electronic valve EEV option The MasterCase controller is also available in a version with a built in electronic expansion valve controller code MGE0000020 The following components also need to be added an NTC temperature probe for reading the evaporation temperature aratiometric pressure probe for reading the evaporation pressure a
12. 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 dI It can also be started manually pressing Cala 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 configuration 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 dis
13. 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 to the value read by probe S3 It can therefore be used to control an electric defrost heater on a second evaporator Def 0 H6 AUX2 configuration Same as parameter H5 As default this output is configured for the control of the hot wire rail heat Def 5 5 10 LAN parameters Number of Slaves 0 LAN not present Configuration of the unit as 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 Def 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 Def 0 Suggestions e During the
14. installation of a LAN make sure that the values of HO on the various units are all different e The value of HO assigned to any Slave must not be higher than the value of Sn on the Master e ALAN must not have more than one unit configured as the Master 5 11 Set point parameters TOM S Operating temperaturesetpomt TA e Cd OO Stn__ Seleet night time set point mode Jf af TT Te hSn Night time set point start time GJ 0 23 hours 0 i e o oas o k soj feo a e Night time set point end time S Absolute minimum temperature probe S1 SL1 90 C function disabled St temperature set point Represents the reference control temperature See the paragraph dedicated to this parameter Def 20 0 Stn select night time set point mode The parameter Stn can be used to configure the controller to automatically change the night time set point The parameter may have the following values Stn 0 no night time set point There will be no night time variation in the set point irrespective of the value set for the parameter r4 positive or negative change in the set point Stn 1 set point variation from digital input If Stn 1 when the status of the digital input programmed as the curtain switch Ax 7 changes the reference set point will also be changed according to the value of the parameter r4 positive or negative change in the set point If no digital input is prog
15. programming procedure To exit the procedure without saving the new values do not press any button for at least 30 seconds TIMEOUT In this way the instrument returns to normal operation without making any modifications to the parameters 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 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 password 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 Pe e press dee 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 al
16. 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 microprocessor 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 2 Layout of the hardware 2 1 Meaning of the inputs and outputs i Li Connection to LAN Ke Local Area Network i 1 i var Connection to x F x user interface terminal display AS485 Connection to Supervisor TSh 24Vac exv DE _ amp 2A ind Bares D 5 1500vA Lamps TE P BA res aux 16A res 16A res HIHI 230V Digital Inputs inputs from voltage free contacts with 8mA closing current connection with removable terminals for wires from 0 25 to 2 5mm max dist
17. 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 recorded 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 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 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 Aux and Aux2 are programmable and can duplicate the function of any of the outputs already present In addition they can be wed as alarm outputs or hot wire outputs and can be configured as additional defrost outputs that are independent of
18. 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 management 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 for further details see the corresponding paragraph further on 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 These tests are performed on 100 of the products Probes The instruments are designed to operate with NTC probes as these offer greater precision across the rated operating range The pressure probes used are ratiometric All the probes are 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
19. 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 Def 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 3 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 to 4 on a controller configured as the 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 both defrost probe and probe 3 present 4 control probe from master slaves only The room probe S1 i
20. DOWNLOADABLE PARAMETERS vi o o o y yi Vip TTT Boo Fable decimal pointto display the temperate O O O moO Remote display management OOOO 9 fUseiirdprobeas end defrostprove POST pe defrost ECT d6 Management ofthe terminal display and remote display during the des i Alarm bypass time after defrost 9 Defrost priority over compressorsafety SS dd fDrippingtie dP Maximum deffost dura 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 management parameters 7 PROBEPARAMETERS me Mn Max mr cessa 39 0 probe 1 100 probe 3 coi Enable decimal point 0 No 1 Yes c 0 n Remote display management 0 not present 1 room probe S1 2 defrost probe S2 C 5 3 third probe S3 4 virtual probe 5 terminal probe 3 pre albraon CI Defrost also with probe 3 1 the defrost by temperature ends when the temperature detected by probe 2 and probe 3 are the temperature set for the parameter dt Probes present 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present Control probe calibration 000000 Control probe calibration 000000 calibration Defrost p robe cal
21. O The alarm is reset automatically when the temperature returns within the set limits see parameter AL HI FLASHING High temperature alarm The virtual probe has read a temperature higher than the set point by a value greater than the parameter AH St e check the parameters AH Ad St and A0 e check the correct operation of the temperature probes e the alarm is reset automatically when the temperature returns within the set limits see parameter AH EE DISPLAYED DURING OPERATION OR ON STARTING Data acquisition error e Try to restore the default parameter values HA HACCP alarm type HA A high temperature alarm has been detected based on the settings of the parameters tr Ad AH St e Check the HACCP parameters e check the temperature and the correct operation of the temperature probes HF HACCP alarm type HF A high temperature alarm has been detected based on the settings of the parameters tr Ad AH St A power failure has occurred for more than one minute and when power returned the temperature was higher than AH St e Check the HACCP parameters e Check the temperature Ed FLASHING 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 1 The signal remains on until a defrost is performed that ends at the set temperature e Check parameters d0 dt and
22. SWORD Pr SF 12 rs Log PASSWORD fr 0 a J P DOWNLOADPASSWORD fr f to 9 Cd Sd P Messuremen seit fr 5 1 _ 4 Virtual probe between probe I and probe 3 c 100 0 probe 1 100 probe 3 75 nie decimal point No T Ye KS E Remote display management 0 not present 1 room probe S1 2 defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe Defrost also with probe 3 1 the defrost at temperature ends when the temperature read by probe 2 and probe 3 are the temperature set for the parameter dt Probes present 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present 2 defrost probe present and probe 3 absent 3 both defrost probe and probe 3 present 4 control probe from master User interface management 0 not present 1 room probe S1 2 defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe Digital input configurations 0 input disabled I immediate external alarm input 2 delayed external alarm input 3 enable defrost from external contact input 4 start defrost from external contact input 5 door switch input 6 remote on off input 7 curtain switch input 8 duty setting activation input 9 door switch with compressor on input 10 periodical case cleaning input Detection delay time for the delayed alarm input An 2 c 0 A8 V
23. a distance of up to 10m from the instrument and can be connected live that is 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 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 propagation 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
24. aised duty setting operation Contact closed duty setting activated a AS As for number 5 but the compressor stays ON ee uker 5 but the compressor As for number 5 but the compressor stays ON ee ON case cleaning impit T_T 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 Agenzia Cod Carel 030220221 Preliminary versione dated 24 01 03
25. an the corresponding value Def 90 0 r3 enable end defrost by timeout signal Enables the signal indicating the end of the defrost after the maximum time set for the parameter dP using the code Ed 0 signal disabled 1 signal enabled Def 0 r4 set point variation The value set for this parameter will only be effective if the parameter Stn is set to 1 or 2 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 Def 3 0 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 on probe S1 enabled 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 Def 0 r6 control with the third probe from digital input This is used to move the tem
26. ance 30m for standards compatibility surge the function of the digital inputs can be programmed using the parameters multifunction inputs G DI1 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 DI5 gt Multifunction digital input 5 NTC sensors inputs for standard Carel NTC probes 10 Kohm at 25 C connection with removable terminals for wires from 0 25 to 2 5mm maximum length of the cables 30m G S1 gt Room probe G S2 gt Defrost Probe G S3 gt Third Probe G S4 gt Not used P C condensing pressure Currently not supported Evaporator Fan L gt Line 4A 250Vac Inductive Load N gt Neutral whe Light L gt Line 1000VA 250Vac fluorescent tube N gt Neutral Compressor L gt Line 12 12 A 2HP 250Vac Inductive Load N gt Neutral 4 7 Defrost L gt Line 12A 250Vac Resistive Load N gt Neutral 230Vac 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 5mm L gt Line 230 Vac 10 15 50 60 Hz N gt Neutral 230 Vac 10 15 50 60 Hz IV Alarm C gt Common 12A 250Vac Resistive Load NO gt Normally Open Free Contact NC gt Normally Closed uu Rail Heat AUX2 L gt Line 12A 250Vac Resistive Load N gt Neutral
27. arm 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 e the control probe error TE the end defrost probe error E2 the defrost by temperature ended by timeout signal if enabled as an alarm Ed e the loss of LAN communication by a controller in network either the Master or the Slaves MA and uSx Accessing the display of the log The alarm log is displayed by entering the value 44 for the password parameter PS Log Password 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 NY otherwise the following 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 option is not present the graphic symbol __ _ is displayed instead of the time The three displays are shown cyclically in succession In the log is scrolled by pressing the arrow buttons Fi a to display the older alarms LI to display the more recent alarms The log can save 10 events The alarms appear in the log in 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 ful
28. 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 A5 A8 Def 0 AT external alarm detection delay Sets the delay in minutes relating to the external alarm from digital input when A1 AS A8 2 Def 0 minutes Ar enable Master for the alarm signals 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 Def 1 5 8 F evaporator fan management parameters Max Fan management 1 fl 0 fans always on except in special cases see parameters F2 F3 Fd 1 fans controlled according to the absolute set point F1 noe e A ag C ag min Fans off when compressor off 0 No 1 Yes Active if FO 0 F3 Fans off in defrost 0 No 1 Yes fl 1 Valid for all values of FO FI Fans offi
29. conditions are right pressed together with button 6 for 5 seconds activates or deactivates the continuous cycle pressed together with button 8 displays the value read by the end defrost probe S2 Pressed together with button 8 when starting the controller loads the default parameters Parameter programming e Moves from one parameter to the previous Decreases the value of the parameter displayed LED on steady defrost on e Flashing defrost request in progress Button red LED Normal operation e 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 when no alarm is present accesses the menu of the type F parameters frequent pressed together with button 6 displays the value read by the third probe S3 pressed together with button 7 displays the value read by the end defrost probe S2 Pressed together with button 7 when starting the controller loads the default parameters Parameter programming e Displays the value of the selected parameter or exits the display e 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 PSTOOSR300 As regards the PJ Small terminal the functions of the buttons are the same as seen for buttons and on the PJ Large terminal
30. d 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 e dI interval in hours between defrosts if set times with the RTC option are not used e dP maximum defrost duration e dO 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 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 D A press the Set D and Down buttons together and switch the instrument on keeping the buttons pressed e when the display shows the combination of characters 23 the buttons can be relea
31. e buzzer To delete the data saved enter Parameter programming mode set parameter Ad from I to 0 and confirm the operation or alternatively press the HACCP button for 5 seconds Note the HF alarm is acquired and consequently the corresponding data are saved only if the power failure lasts for more than 1 minute tr HA alarm delay Delay in the activation of the HA alarm Def 0 tA type of HACCP alarm Identifies the type of the most recent HACCP alarm HA or HF tA 0 no alarm tA 1 HA alarm tA 2 HF alarm Read only parameter Def 0 tO weekday last alarm Displays the weekday on which the last HACCP alarm occurred Ad 1 7 Monday Sunday Read only parameter Def 0 tH hour last alarm Displays the hour at which the last HACCP alarm occurred Read only parameter Def 0 tM minutes last alarm Displays the minutes at which the last HACCP alarm occurred Read only parameter Def 0 tt maximum temperature during alarm Displays the maximum temperature reached duringthe last HACCP alarm Read only parameter Def 50 0 tE duration of the HACCP alarm Duration of the last HACCP alarm Read only parameter Def 0 to reset HACCP alarms Deletes all the data saved for the HACCP alarm restoring the default values Def 0 5 13 RTC Real Time Clock parameters fa Current weekday TE TI 7 dy I ff Cummins ou fe Curemtminues ET
32. e 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 Def 120 minutes DIGITAL INPUT CONFIGURATIONS The MasterCase series instruments feature five digital inputs that can be configured using parameters Al A2 A3 A4 and AS following A1 A5 respectively associated with the inputs DI1 to DIS In addition a further parameter A8 is used to manage a digital input called the virtual input as it is not physically present on the instrument but rather associated with the status of digital input DI1 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 parameter A8 will have no function The functions corresponding to each value of A4 A5 A8 are described below Al A5 A8 0 digital input disabled The corresponding digital input is not used and ignores the closing opening of any contacts connected to it A1 A5 A8 1 input associated with an immediat
33. e display management during defrosts During the defrosts two types of behaviour can be set for the user interface and the remote display 0 display of the temperature alternating with the symbol dF on both displays 1 both displays locked on the last value displayed before starting the defrost The display normally returns on both devices after the post dripping phase with normal control enabled Def 0 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 1 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 skipp
34. e 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 is stopped and the successive defrosts 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 t
35. e of the function that is the threshold above the set point at which modulation of the cooling capacity of the showcase starts OSH 0 function disabled Tf set point st differential rd 2 PRACTICAL EXAMPLES Function disabled or enabled with the value of the parameter OSH too low Function enabled with the value of the parameter OSH too high The advantages of the function are not exploited adequately Function enabled with the optimum value of the parameter OSH 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 Def 0 0 6 Alarms 6 1 Abnormal operation or special conditions 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 the malfunction is signalled on the display with a corresponding alarm code In particular the instrument displays the alarm code alternating with the temperature read by the probe in the event of more than one alarm these are displayed in succession alternating with the temperature e for some alarms the buzzer if present and the alarm relay are activated gt A sce Pr
36. e same probe PA 0 propagation disabled PA 1 propagation enabled This parameter can only be set to 1 on the Master Def 0 Pb enable evaporation pressure probe via the local network To enable the propagation of the pressure probe reading via the local network parameter PB must be used to enable each Slave to use the reading sent by the Master for calculating the superheating value PB 0 use the local pressure probe PB 1 use the pressure probe reading sent by the Master via the LAN This parameter may only be set on the Slaves Def 0 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 Pi 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 Def 5 minutes PE display superheating value read only The parameter PE read only can be used to enable the display of the superheating value acquired by the MasterCase controller Def read only parameter PH refrigerant type Parameter PH is used to set the type of refrigera
37. ed 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 of 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 d7 0 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 the display Def 1 hours d9 Defrost priority over safety and control activation times Cancels the safety times set using the parameters in family c when starting the defrost 0 the safety times are observed 1 the defrost has greater priority and the times set using the c parameters are ignored Def 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 are stopped so as to allow the evaporator to drip Def
38. ee fundamental parameters used to configure an instrument for operation in a network LAN or supervisor or stand alone operation Jn HO and Sn In defines the unit as the Master In 1 or a Slave In 0 HO represents the address of the instrument in the supervisor network for the Master or in the LAN for the Slaves Sn represents the number of Slaves present in the LAN only set on the Master For the Master the parameter In must be set to 1 the parameter Sn Slave number from I to 5 depending on the number of Slaves 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 HO HO Prev Master Sn Prev Master 1 Fig x x x When switching the instrument on the display will show uM Master unit If the instrument is fitted with the RTC card the following parameters also need to be set e parameters td th t weekday hour minute CONTI e parameters dx hx mx with x 1 2 10 days hours and minutes corresponding to the defrost times with I minute resolution For the Slaves e the parameter In must be set to 0 e parameter HO address of the slave in the LAN When switching the instrument on the display will show uSx x 1 5 value of H0 3 2 3 Selecting the main
39. elay 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 A1 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 if the 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 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 A1 AS 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 logica
40. enesrenensssssrsenene 12 3 2 2 Stand alone local network LAN and supervisor configuration iie 12 3 2 3 Selecting the main operating parameters srnrrvrorvnvrvrerenerererererererererererererererererererenererererererererererereseseresesesesesesesesesesessne 13 3 2 4 Loading the default values of the parameters 13 4 LAN E LEE a Ea C0 CARRA 14 4 1 Network defrost in multiplexed installations i 14 4 2 R mot alarni Sigal Sc cicala ae anse 14 4 3 Transmission of signals and probe readings i 14 5 Setting the parameters essesssensensenvenvenrervernensennennennennennnennennnnnennennsensensensensennennesnennensensennennesnnennennennennennsensensennennenneensenennennenneenseneennene 15 Exiting the programming procedure ER E LORA A RR 15 SAN Classification OF the parameters till o 16 5 2 lt Password parameters siste RA IRA ARIA LO Lire 16 5 3 temperature probe management parameters ese eeeseeseeseseeeeseeseseeseeeeseesesecseeaescescsessceesseesssesseeasseesceesseeessesseeesseeasaeeaee 18 JA temperature control parameters iraniani E E NE ripicca pa inline et 19 5 5 c safety and control activation time parameters i 5 06 d d frost management parameters ava SRL RA IO AR ARRE TE ST A alarm management Parameters co csr iscscsssessasscencesssersssosesensssesncossoceysevenessodecstesdebsastbessseserseseeotetestepteonssedonapua
41. erformance 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 MasterCase 1 1 Main characteristics of the 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 this controller 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 is 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
42. essing mutes the buzzer and de energises the relay while the alarm code disappears only when causes of the alarm are no longer present The alarm codes are shown in the table below DESCRIPTION MODELS where featured contro probe error FALLS room probe error AL defrost probe error FALLS probe 3 error AL terminal probe error display ALL immediate external alarm delayed external alarm Tow temperature alarm 2 cdi igh temperature alarm AL data saving error FALLS HA alarm HACCP FALLS HF alarm HACCP FALLS defrost ended by time ou me superheating temperature sensor NTC Sh on driver board out of range code MGE0000020 evaporation pressure sensor PE on driver board On MasterCase with EEV management loss of internal communication between EEV driver On MasterCase with EEV management door switch error door open timeout defrost in progress o Li RTC invalid MA not active lost contact with the Master uX X 1 5 not active Slave X not communicating ALARM CODE BUZZER and AUX RELAY E active not active not active not active not active active active active jam active not active T gt active active m SN DM not active mm mA mr mH active active active not active 5 not active not active T Ti D 6 2 Description of the signals and alarm codes shown on the display rE FLASHING Control p
43. gt Data signal G gt Ground 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 24Vac power supply terminals The product code of the programming key is PPOPZKEY00 For details on how to use the key refer to the corresponding instruction sheet 2 2 Codes of the models and accessories MGE0000000 MGE0000020 MasterCase with built in electronic valve driver MGEOPZSERO Optional card for RS485 serial connection O f A hi 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 PSTOOSR300 large terminal with 4 digits and 8 buttons code PSTOOLR200 remote display with 3 digits code PSTOOVR100 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 PST00LR200 8 Button red LED Normal operatio
44. he temperature measured by probe S2 is 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 performed Def 5 hours Temp S2 C Control ON OFF time 1 t1 t2 tn d3 gt Start defrost d4 Defrost when switching the instrument 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 Def 0 d5 Defrost delay when switching the instrument 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 Al A5 3 or 4 Def 0 d6 user interface and remot
45. ibration Defrost p robe calibration robe calibration User interface management 0 not present 1 room probe S1 2 defrost probe S2 3 third probe S3 4 virtual probe 5 terminal probe 2 defrost probe present and probe 3 absent 3 both defrost probe and probe 3 present 4 control probe from master C calibration or calibration 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 2 measurement stability Defines the coefficient used to stabilise the temperature measurement Low values assigned to this parameter offer a prompt response of the sensor to variations in temperature the reading is 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 Def 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 100 4 xS1 4 xS3 100 If set to 0
46. ight time variation with third probe 1 night time with curtain down control with probe 3 flag 0 night time control with the virtual probe i Control dierent stesi ea rH Max temperature measured in the interval rt Cc L e Min temperature measured in the interval rt i Min and max temperature monitoring time Hr st t est O fr a Sin Select night time set om mode Jf af o 2 ma 0 si Matin setpoint state as aa ae a E E R I SLI Absolute minimum temperature probe S1 50 0 SL1 90 C function disabled i LAN PARAMETERS Number of Slaves 0 LAN not presen KES ER a I EG ER 1 a GF HA alarm delay 0 HACCP disabled HACCP alarm type 0 no alarms 1 HA alarm 2 HF alarm 70 Last HACCP alam d amp y A ou Tr fa 0 fess RC am re rest M Last HACCP alarm minute SSCS Cf 39 min 0 Ti Men perte ead daring HACCP Samy ATTS ME HACCP alarm duration TT fy hus 0 to Reset HACCP alarms A S o i me 0 Max coin le ea rai Hour of the first deo TT hous FT BT ATT eT DE T E E E E d2 Day of the second defrost see Note 2 ph Hour of the second defrost ey 79 m2 Minutes or hour hd on the urent day Tor saring the des Co enni EEE ei E Dayo the eight delos tene GJ 0 hs Mourofthe eight dee pa 0 m8 Minutes of hour h8 on the current day for starting the defrost C 0 id Curemtweekday pe 7 mh
47. ing the dripping wait in the case of network defrosts dripping if featured and post dripping if featured times the fans are always off Def 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 Def I minutes 5 9 H other settings m SETTINGS Type im Me UOM Det ToLAN HO Serial adire cy o m r 1 PHI__ Enabte DisableTRremote control ay TT me 0 2 infrared remote controleode A A E 0 m Enable ONTOFF from keypad 0 1 fe 1 Hi Enable ON OFF from supervisor Teo 1 ma 0 ed 5 AUXiconfieuraion cy TT 0 me AUX configuration wi Jf fo fs TT HO 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 super
48. irtual digital input configuration ae YY Temperature alarm delay Cc High temperature alarm indicates the maximum variation from the set point AH 0 disables the high temperature alarm Low temperature alarm indicates the maximum variation from the set point AL 0 disables the low temperature alarm Ar Enable Slave remote alarm signal on Master 1 remote alarms enabled on Master i FE FE EE EA eee 0 always OFF 100 always ON E Low temp alarm bypass time after continuous gle of o pms 2 f gt e Continuous eyele duration A ou nm hus 4 gt fi DEFROST PARAMETERS Type Mim Max UOM Det Toran Defrost type 0 electric ends at temperature and or by timeout 1 hot gas ends at temperature and or by timeout 2 electric ends by timeout 3 hot gas ends by timeout LAN defrost command type 0 start only 1 start and stop d3 Compressor running time with ambient temperature below 1 C before forcing a defrost Defrost when starting the instrument 0 No 1 Yes c 0 Defrost delay when starting the instrument or from digital input Interface module and remote display management during defrost 0 No display lock The temperature alternates with the dF symbol on both displays 1 Temperature locked on both displays v KN High temperature alarm bypass time after defrost and if A4 5 or A8 5 alarm bypass time from door open Defrost priority over compressor p
49. l 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 _ 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 To exit the display of the log press D for one second or alternatively do not press any button for 30 seconds Deleting the log di The alarm log can be deleted by pressing and holding Le and ba 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 after having reached the parameter Pd Download Password e enter 66 as the password on the Master unit with Slaves connected to download the parameters from the Master to the Slaves during the configuration of a multiplexed island e press 3 for more than 5 seconds to start 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
50. l 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 A1 A5 A8 8 duty 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 controller 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 cleaning management This configuration of the digital input is used to manage the
51. motorised expansion valve a 24Vac 15V A safety transformer with a 1A slow blow fuse on the secondary P__ VALVE PARAMETERS T Enable evaporation pressure probe via the local network set only on the slaves 0 local probe DI 1 Master probe PH Pressure probe alarm dele O o o i Display superheating Te HEER ES EE Type of gas 0 R134a 1 R22 2 R404a 6 i 2 3 R410a 4 R407c EE EE eee Pi Evaporation pressure probe model G 2 p P P Superheating offset c 00o 6o J oof P1 valve model The MasterCase controller can manage 3 different models of valve Parameter P1 is used to set the model installed P1 0 Carel E2V 1 16mm valve nn 390 steps 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 16mm valve EV nn 480passi Def 2 P3 superheating set point Parameter P3 is used to set the superheating set point at the evaporator outlet Def 5 0 Note too low values for the set point may compromise the stability of the showcase control functions It is recommended to not set the value below 3 C PA enable propagation of evaporation pressure probe on local network 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 th
52. n e pressed for 5 seconds deletes the HACCP alarm and resets the related signals codes HA or HF on the display the buzzer and the alarm relay and deletes all the corresponding data saved LED on steady HACCP alarm Button yellow LED Normal operation Pressed for 1 second activates deactivates the AUX1 relay output light LED on steady AUX1 relay output light active Button green LED Normal operation Pressed for 5 seconds switches the unit ON OFF LED e 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 e Pressed for 5 seconds activates or deactivates the continuous cycle LED on steady continuous cycle on Button green LED Normal operation e Pressed for 1 second switches the light on or off 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 e Moves from one parameter to the next Increases the value of the parameter displayed LED e On steady compressor on e Flashing compressor activation request in progress cooling request Button yellow LED Normal operation e Pressed for 5 seconds starts a manual defrost if the
53. n post dripping TETI FO 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 FO 0 fans managed based on the parameter F2 FO 1 fans subject to the fan controller see parameter F1 It should be remembered that if a dripping phase parameter dd 0 and or post dripping phase parameter Fd 0 is set the fans are always off in these phases Def FO 0 min 1 F1 absolute fan control set point parameter valid only if F0 1 The fans are controlled according to the following formula Temperature S2 lt FI AO gt fans on Temperature S2 F1 gt fans off Def 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 Fd or only when the controller is on F2 0 no fans always on F2 1 yes fans off when the controller is off Def 0 F3 fans off in defrost parameter always valid This is used to decide whether the fans must be on or off during the defrost F3 0 no fans always on during the defrost F3 1 yes fans off during the defrost It should be remembered that dur
54. ng signal Otherwise the buzzer will sound again and the signal will remain on the display Def 0 minutes 5 7 A alarm management parameters AO Fan Gee parameter Fi and alam differenti C 0 f 200 Ted AS Digital input configurations Jfe f of Cd Ci AT Detection delay time for the delayed alam mput An 2 C o 180 mm AE Virtual digital input configuration A 0 OC id AT Temperature alarm delay TC 0 10 ma 10 Ad AH High temperature alarm indicates the maximum variation from the set E point AH 0 disables the high temperature alarm AL Low temperature alarm indicates the maximum variation from the set point AL 0 disables the low temperature alarm Ar Slave alarm signal enabled on Master 1 remote alarms enabled on Master AO 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 In the case of the alarms the value of AO is used to determine the points at which the temperature alarm is deactivated Def 2 0 set point 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
55. nning time with ambient temperature below 1 C before forcing a defrost Interface module and remote display management during defrost 0 No display lock The temperature alternates with the dF symbols on both displays l Temperature locked on both displays di Interval between two defrosts 192 P_ Maximum defrost duration prp i fo mn 0 id a Defrostend temperature pr f300 300 40 aM Time between two successive eleaningsign Gy 1 99 hos 1 PM Cleaning signal duration f fo em mn 0 __ J d0 type of defrost Establishes the type of defrost 0 electric heater end at temperature or after maximum safety time timeout 1 hot gas end at temperature or after maximum safety time timeout 2 electric heater end by timeout 3 hot gas end by timeout Def 0 electric heater defrost end at temperature 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 end signal stand alone instrument d2 I the instrument waits at the end of the defrost for the end signal sent by the Master via the LAN of multiplexed showcase Def 1 d3 Running time with evaporator temperature below 1 C before starting a defrost Determines how long the controller operates solenoid valve output compressor active when t
56. nt used in the system PH 0 R134a PH 1 R22 PH 2 R404a PH 3 R410a PH 4 R407c Def 2 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 1013 4 168 mbarg 0 75 psia Pi 1 probe with range 1013 9329 mbarg 0 150 psia Pi 2 probe with range 0 34474 mbarg 0 500 psia 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 pressure reached during normal operation excluding transitory conditions Def 0 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 control of 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 determines the deviation from the actual superheating value measured that is applied when the temperature controlled enters in the activation zon
57. o 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 Al 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 A1 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 drawing explains the above function Se time dle Q dP unit d5 qeira Doo y d dP dini q dle Q ME EN sit 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 d
58. 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 e press MO button for one second to display the current set point The value flashes A n a MY DD e increase or decrease the set point using the x and or Lad buttons until reaching the desired value gt e e press again to confirm the new value Parameters relating to the set point Differential control hysteresis parameter rd The default of this parameter is 2 degrees The value is RELATIVE that is it is 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 point On is equal to the set point St differential rd OFF 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 The values of these parameters are also RELATIVE to the set point AH high temperature alarm AL low temperature alarm A
59. perature control to the third probe S3 when a digital input configured as the curtain switch is closed see parameters A1 A5 7 r6 0 no change control by virtual probe r6 1 when the digital input is closed control is performed using probe S3 Def 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 Def read only parameter no default value 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 from the start of the monitoring cycle Def read only parameter no default value rL minimum temperature measured in the time rL Once the temperature monitoring function parameter r5 has been enabled this parameter records the minimum temperature reached from the start of the monitoring cycle Def read only parameter no default value 5 5 c safety and control activation time parameters e TIMES AND SAFETY PARAMETERS eni Control start delay when switching the instrument on Safety relay 0 control always OFF 100 control always ON c6 Low temp alarm bypass time after continuous cycle Kam ce Continuous cycle duration c 0 c0 Control start delay when switching the instrument on This parameter i
60. play 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 e Master is activated The nX signal on the Master unit can be inhibited for one minute by pressing 4 3 Transmission of 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 5 Setting the parameters The parameters have been grouped 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 the Master to the Slaves e via an RS485 serial connection if the optional card is fitted To set the parameters from the keypad proceed as follows Accessing the type F parameters om e
61. press for more than 5 seconds e the fz shows the parameter PP Parameter Password e press and Ed to scroll the parameters Accessing the type C parameters e press for more than 5 seconds e the display shows the parameter PP Parameter Password e press e press gt or Eid until displaying 22 password to access the type C parameters gt set e confirm by pressing e the display shows the parameter PP again G i press fr until displaying the parameter to be programmed Modifying the parameters After having displayed the first parameter either type C or type F proceed as follows t e press x ba until reaching the parameter to be programmed press dee to display the value associated Fi r X e modify the value by pressing and or Lal i press dee to temporarily confirm the new value and return to the display of the parameter code e repeat all the operations in the point Setting the parameters to modify the values of other parameters Saving the new values e press the SET button for five seconds to save the new value values entered and exit the Parameter programming procedure i Important note only pressing the 5 button permanently saves the temporary values entered during the operation If the instrument is switched off before pressing for five seconds all the changes made and temporarily saved will be lost Exiting the
62. rammed as the curtain switch Ax 7 there will be no night time variation of set point If on the other hand Ax 7 but Stn 1 when the status of the x th digital input changes there will be no variation in the set point but rather the simple activation of the output light The action corresponding to the parameter r6 night time control on probe 3 will be only be related to the setting and the status of the x th digital input Stn 2 variation by RTC If the controller is fitted with the RTC option the controller can be programmed to change from the daytime to the night time set point and vice versa by setting two time bands See the figure below Def 0 hSn Night time set point start time If the night time set point from RTC function is used this parameter indicates the time that the set point is changed see parameter r4 and the reference probe is changed if set see parameter r6 See the figure below Def 0 hSd Night time set point end time If the night time set point from RTC function is used this parameter indicates the time at which the function is stopped See the figure below Def 0 night time set point daytime set point nightktime set point hSd hSn Fig xx MINIMUM OUTLET AIR TEMPERATURE ALARM This function should be used when the controller is set to use the virtual probe ee TT Sonda Virtuale temp di Regolazione In this case in fact the tempera
63. robe error e Probes not working the probe signal is discontinued or short circuited e Probes not compatible with the instrument E1 FLASHING Room probe error e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E2 FLASHING Evaporator probe error e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E3 FLAS HING Probe 3 error e Probe not working the probe signal is discontinued or short circuited e Probe not compatible with the instrument E0 FLASHING Terminal probe error 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 IA FLASHING Immediate alarm from digital input e Check the status of the digital input and the value of the corresponding parameter A1 A5 A8 dA FLASHING 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 FLASHING Low temperature alarm The virtual probe has read a temperature lower than the set point by a value greater than the parameter AL e Check the parameters AL Ad and A
64. rors etc This function can only be activated on the controllers with the RTC option inserted 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 Recording of the maximum temperature Alarm duration HF this is activated after a power failure if when power returns the temperature is higher than the threshold of AH St The following data are saved e hour minutes and weekday e type of alarm maximum temperature reached after the activation of the alarm e duration of the alarm in this case the time also includes the duration of the power failure Polia eta 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 th
65. rotection 0 No 1 Yes Dripping time after defrost Interval between two defrosts Maximum defrost duration F Defrost end temperature hous 1 PM Cleaning signal duration fy 0 f mn 0 E FAN PARAMETERS F Fan management 0 fans always ON except in special cases see F2 F3 Fd C 1 flag 1 fans controlled according to the absolute set point F1 C a SOE Se GJ o IT fm a e Valid for all values of FO min Fa__ Fans offin post dripping fr 0 5 me 1 fi OTHER SETTINGS pe mim J Max UOM Dek ToTAN HO Serial adire 0 cy 0 1 Ai Enable Disabie TR remote cont Jeep 0 1 me 0 2 Infrared remote controlcde ay 0 et EJ A H3 Enable ON OFF from Rep pf e f 0 I me i mg CI J RENE Enable ON OFF from supervisor cC 0 H5 AUXI configuration 0 output disabled 1 ON OFF valve output 2 compressor output 3 light and or curtain output c 4 fan output 5 hot wire output 6 alarm output 7 evaporator 1 defrost output 8 evaporator 2 defrost output H6 AUX2 configuration hot wire c for the values see H5 In Configuration of unit as Master c 1 fla In 1 or Slave In 0 8 CONTROL PARAMETERS Cee re 8 20 08 02 ECE Maximum temperate seting ______ Enable Ed alarm defrost ended by timeout r4 Automatic variation of the night time set point a Teta f ep Enable min and max temperature monitoring IATA N
66. s always considered as being present Def 0 5 4 r temperature control parameters CONTROL PARAMETERS La Maximum temperature setting au fs Enable Ed alarm defrost ended by timeout Automatic variation of the night time set point c 20 20 C 30 curtain switch closed r5 Enable min and max temperature monitoring c 0 No 1 Yes r rl r2 r3 r4 r6 Night time variation with third probe 1 night time with curtain lowered control with probe 3 0 night time control with the virtual probe rd rH rL rt Max temperature measured in the interval rt rd Control differential hysteresis Min temperature measured in the interval rt rt Min and max temperature monitoring time fo rd differential Determines the value of the temperature control differential Operation can be defined as follows temperature gt set point diff rd gt control on temperature set point gt control off This is also shown in Figure xx Direct cooling rd on actuator off Set point Fig xx Def 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 corresponding value Def 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 th
67. s used to delay by a set time in minutes for 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 refrigeration system when starting ON acnersions strumento NON S A OFF Je Sve are on I naarian saquest pn A RE Se Nee een Se ae Shore opp ON Def 0 minutes c4 Duty setting or safety relay 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 controller always OFF c4 100 controller 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
68. sed 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 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 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 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 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 4 1 Network defrost in multiplexed installations
69. sent dr Door open for more than the time set for parameter d8 e Check that the door is closed e Check the door switch dF FLASHING Defrost in progress e This is not an alarm signal but rather an indication that the instrument is performing a defrost e It appears only if parameter d6 0 or d6 2 tC flashing RTC error on the unit fitted with RTC and configured as the Master e Set the hour and minutes from the user interface MA flashing on Slave Slave not communicating with the Master e Check the electrical connections on the LAN e check the settings of the parameters In Sn and HO e these network signals on both the Master and the Slaves are reset automatically as soon as communication is restored between the Master and the Slaves n1 n5 flashing on the Master Local alarm on Slave nl n5 e Check ul u5 flashing on Master Loss of communication with Slave 1 5 for at least a minute e Check the electrical connections on the LAN e check the settings of the parameters In Sn and HO e these network signals on both the Master and the Slaves are reset automatically as soon as communication is restored between the Master and the Slaves dl d5 flashing on Master Parameter download failed to unit uS1 uS5 e Check the wiring on the LAN e repeat the download procedure 7 MASTERCASE parameter table PP PARAMETERPAS
70. setenreveseaseceesnds 5 8 F evaporator fan management parameters DO SHS Other settings arsen 5 10 LAN parameters nie nnen RARA iii 5 11 Setpoint parameters 43h AA EA E EE eases A E Alena SEI minimum temperature Jor probe SI ene E E EEN EAE CEEE EEA 5 12 HACCP parameters 5 13 RTC Real Time Clock parameters 5 14 Electronic v lve EBV OPUHOD siii e danker Graeme 6 1 Abnormal operation or special conditions are o A A iE E E a eE eaa 6 2 Description of the signals and alarm codes shown on the display i 36 1 Introduction 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 p
71. the other hand manage the defrosts on the slaves served network defrost OFF 15 min Def 0 control always off cc continuous cycle duration This is 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 Def 4 hours c6 alarm bypass after continuous 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 Def 2 hours 5 6 d defrost management parameters d DEFROST PARAMETERS Type Min Max UOM Def Defrost type 0 electric ends at temperature and or by timeout 1 hot gas ends at temperature and or by timeout 2 electric ends by timeout 3 hot gas ends by timeout LAN defrost command type 0 start only 1 start and stop Compressor ru
72. ture control is based on a weighted value of the two probes S1 and S3 This means that despite the fact that the reference is constant the temperature of the two probes may in reality differ significantly with the risk of having an evaporator air outlet temperature that is the air that comes into contact with the product that is dangerously low SLI minimum temperature for probe S1 If the temperature read by probe S1 falls below the minimum value SL1 the controller is stopped and an alarm is activated code displayed gt LO1 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 Def 90 0 5 12 HACCP parameters HA alarm delay HACCP 0 HACCP disabled Type of HACCP alarm 0 no alarm 1 HA alarm 2 HF alarm O Weekday ast HACCP am Jf fo 7 b 0 i Four last HACCP alam 08 nm 0 M Minutes last HACCP alarm pc o 9 Min i Maximum temperature measured during the HACCP alarm C 300 300 ME Puration o the HACCP alam O cy 0 ro Reset HA HFalam Teo 71 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 er
73. visor 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 HO HO previous Master Sn _previous_Master 1 Def 1 H1 enable disable remote control Enables the use of the infrared remote control Def 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 Def 0 H3 enable On Off from keypad Enables or disables the ON OFF button on the user interface H3 0 On Off button disabled H3 1 On Off button enabled Def 1 H4 enable On Off from supervisor Enables or disables the remote ON OFF signal from the supervisor H4 0 Remote ON OFF from the supervisor disabled H4 1 Remote ON OFF from the supervisor enabled Def 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 HS 1 ON OFF valve output works in parallel to the controller and can used to control a solenoid valve H5 2 compressor output repeats the operation of the main control output symbol H5 3 light and or curtain output H5 4 fan output H5 5 hot wire output rail heat the output is always active except

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