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1. INDIA www subzero co COLD ROOM CONTROLLER USER MANUAL CRC 2052 Index PARAMETER DESCRIPTION Introduction Get to Know Your Controller Items Included Key Introduction Fault Messages LED Indication T a HSET To set cut out point of the controller for 1 Humidity To set the differential for compressor restart To set probe calibration To set time delay between relay restart 2 time To set type of computation for defrost 14 1 time To set defrost stop temperature 01 CRC 2052 U Ul U TU U ES 8 ES E ES Ka ao ao Index PARAMETER DESCRIPTION To enable or disable humidity sensing a ac w a ee a j NIN 9 9 1 1 L N To set allowable high humidity limit To set allowable low humidity limit To set differential Hysterisis for humidity rost SS Ka SS oa To set probe calibration for humidity To set time delay between relay restart time for humidity To set quick freeze duration 2E O x co 1 1 To set condenser on delay time s o co To set condenser status at hot gas defi To set Evaporator Fan stop temperature 20 r r N compressor off To set Evaporator Fan status at Door open condition To set Evap Fan status during defrost 2 To enable disable buzzer 5 6 9 9 0 0 2 2 r Wi To set condenser logic To set condenser differential To s2. Function To set On cycle at room probe fail To change TON parameter press the set key Min Max Fact Set 10 Min CRC 2052 Use UP DOWN keys to set desired value At room probe fail condition when E1 parameter is selected as CYC then the on cycle is specified by Ton parameter 26 Description of parameters and functions press the set key N Parameter Parameter setting method 46 TOFF Function To set Off cycle at room probe Parameter fail To change TON parameter Use UP DOWN keys to set desired value At room probe fail condition when E1 Range 3 parameter is selected as CYC then the Min Max _ Fact Set Off cycle is specified by Ton parameter 1 Min 30 Min 4 Min 47 E Function To set Display at defrosting arameter press the SET key To change E7 parameter Use UP DOWN keys to set desired value Range TEMP At defrosting temperature Min Max Fact Set will be dispalyed TEMP DEFR TEMP DEFR At Defrosting Defrost ON will scroll 47 E8 Function Defrost duration during Coil Parameter probe failure press the SET key To change E8 parameter Use UP DOWN keys to set desired value Example If this is set to 10 min Fact Set then manual defrost for 10 min Range Min Max 1 Min 10 Min 5 Min will take place during Coil probe fail 27 CRC 2052
3. Range Min Max Fact Set NO YES NO JG Parameter To change Unit ID parameter press the SET key Range Min Max Fact Set 1 240 1 It will display compressor run hours It s a read only parameter Function Clear Compressor Run Hours If this parameter is set to YES compressor run hours CRH are cleared Function To set Unit ID This parameter is used to set the Unit ID of the device Function To activate Keypad Lock To change Keypad Lock parameter press the set key Range Min Max Fact Set NO YES NO 29 This parameter can lock the keypad so that tempering is not possible by by standers NO deactivates keypad lock YES activates keypad lock On activation all the parameters can only be viewed but not modified If the keypad is locked LOCK message will be displayed CRC 2052 Description of parameters and functions Sr No Parameter PO Parameter Parameter setting method Function To enable disable Power Switch To change PO parameter press the SET key Range Min Max DIS Fact Set PDIS Parameter Use UP DOWN keys to get desired value amp press SET key to confirm DIS Disable power switch ENB Enables power switch Controller has power switch which if enable puts controller in active or stand by state If press for 2 seconds controller will go in stand by mo
4. Description of parameters and functions Sr Parameter Parameter Parameter setting method Function To set time delay to switch off the light To change LD parameter press the SET key Range Min Max Fact Set PDN Parameter Use UP DOWN keys to set desired value This parameter is used set the time delay to automatically switch off the light If LD is set to 0 then this parameter is disabled Example If this parameter is set to 7 mins then when light is switched on after 7 mins it will be switch off automatically Function To activate Solenoid Valve relay To change PDN parameter press the set key Use UP DOWN keys to set desired value DIS SV relay will not activate ENB SV relay will get activated and will cut out and cut in according to set temperature Range Min Max Fact Set DIS ENB DIS PW Parameter Function To change password To change the PW parameter press the set key Use UP DOWN key to change the password User can enter into program mode only if correct password is entered If the password is wrong it will show INVALID Range Min Max Fact Set 0 9999 0 PASSWORD CRC 2052 28 Description of parameters and functions Sr No EI CRH Parameter Parameter Parameter setting method Function To view Compressor run Hours B CCRH
5. TT The controller controls the defrost in the system based on either an electrical heater where the compressor is stopped or at cycle inversion using warm gas where the compressor keeps on working There are safety features which include shutting down the system incase of a fault from a pressure control or similar device Aseries of safety controls delay at start up minimum disable time minimum time between activation protects the compressors from close starts In case of probe error or temperature alarm the instrument signals the event through acoustic signal and by closing the relay contact By pressing the mute key the buzzer is silenced A number of parameters are displayed alphanumerically to set up the instrument for each specific function Computer Connectivity over RS485 and Remote monitoring Optional Single Operation Quick Freeze Mode Press QF Key for 2 sec set system in quick freeze mode which is time based for that period new set point will be lower than running set point and system will try to achieve that set point after time period over set point will be normal set point CRC 2052 04 Get to Know Your Controller Key Introduction Used to enter in manual defrost and to stop defrost if defrosting is ON Used to increment scroll in Program Mode When not in any mode H this key is pressed for 2 secs controller will enter in display Probe mode where Condenser Evap temperature 8 RH can
6. To set the differential for compressor restart Description of parameters and functions Sr No DI P5 Parameter Parameter Parameter setting method Function To set probe calibration To change P5 parameter To change P4 parameter press the set key Range Min Max Fact Set 0 5 C 20 0 C 2 0 C 11 Use UP DOWN keys to set desired value Example Cooling Mode If the set point is set at 10 0 C and differential is set at 2 0 C then when the system reaches 10 0 C the comp relay will cutout Since the differential is 2 0 C the comp Relay will cutin at 12 0 C 10 0 C 2 0 C press the set key Range Min Max Fact Set 10 0 C 10 0 C 0 0 C P6 Parameter Use UP DOWN keys to set desired value In time it may be possible that the display may be offset by a degree or so To compensate for this error you may need to add or minus the degrees required to achieve the correct temperature Example The temperature on the display is 28 0 C whereas the actual temperature is 30 0 C You will need to set this parameter to 2 0 C which means that once out of the programming parameter the display will show the temperature 30 0 C 28 0 C 2 0 C Function To set time delay between relay restart time To change P6 parameter press the set key Range Min Max Fact Set 1 Min 20 Min 3
7. Although great care has been taken in the preparations of this document the company orits vendors in no event will be liable for direct indirect special incidental or consequential damage arising out of the use or inability to use the product or documentation even if advised of the possibility of such damages No part of this manual may be reproduced or transmitted in any form or by any means without the prior written permission of the company A S Controls Pvt Ltd reserves the right to make and changes or improvements without prior notice Warranty TT J SH This product is warranted against defects in materials and workmanship for a period of one year from the date of purchase During the warranty period product determined by us to be defective in form or function will be repaired or at our option replaced at no charge This warranty does not apply if the product has been damaged by accident abuse and misuse or as a result of service or modification other than by the company This warraniy is in lieu of any other warranty expressed orimplied In no event shall the company be held liable for incidental or consequential damages such as lost revenue or lost business opportunity arising from the purchase ofthis product 35 CRC 2052 OUR OTHER PRODUCTS INDIA Cold Room Controller Chiller Controller Two Compressors Controller Heating Controller Humidity Controller Pressure Controller CASTLE Ball Valves Globe V
8. H6 set at 3 minutes the relay for Humidifier will cut off at the set Humidity but will not restart for a minimum of 3 minutes even if the differential is achieved earlier This parameter is good to protect the life of the Humidifier or even in applications where the probe is placed at places where there are sudden 8 short changes in humidity like above a cold room door CRC 2052 Description of parameters and functions Sr No QFD Parameter Parameter Parameter setting method Function To set quick freeze duration press the set key To change the QFD Parameter Use UP DOWN keys to set desired value This is the maximum amount of time Range allowed for Quick Freeze If set to 0 Max CND3 Parameter Fact Set here will be no quick freeze Example If QFS is set to 20 0 C and quick freeze duration is set to 1 hr then when it is in quick freeze mode then the Comp will work on 20 0C set point for 1hr Function To set condenser logic To change the CND3 parameter press the set key Use UP DOWN keys to set desired value This function is used to set condenser logic as per compressor or condenser Set point COMP As per compressor Range Min Max Fact Set COMP SP COMP SP As per condenser SP CND4 Parameter If this parameter is set to Compressor then con
9. Min Use UP DOWN keys to set desired value This parameter is used to protect the fan from restarting in a short period of time and can be set between 0 to 20 minutes Example If this parameter is set at 3 minutes the compressor will cut off at the set temperature but will not restart for a minimum of 3 minutes even if the differential is achieved earlier This parameter is good to protect the life of the compressor when there are power fluctuations and the compressor is switched off and on within a few seconds 12 Description of parameters and functions Description of parameters and functions Sr No Parameter Parameter setting method 06 P7 Function To set duration of defrost Parameter Sr No P10 Parameter Parameter Parameter setting method Function To set type of defrost To change the P7 Parameter Use UP DOWN keys to set desired value parameter press the set key LU This is maximum amount of time allowed Range for defrost If set to 0 there will be no defrost cycle Min Max Fact Set 0 Min Example If P7 is set to 15 Mins and P8 parameter is set to 1 Hr then after every 1 Hr defrosting will take place for 15 mins P8 Function To set defrost frequency Parameter To change the P8 Parameter Use UP DOWN keys to set desired value parameter press the set key This is the amount of time between two Range defro
10. be viewed Used to come mute the buzzer Alarm amp to exit any mode Used to enter in fault log mode Used to switch OFF ON the controller Used to enter in quick freeze mode Used to decrement scroll in Program mode Used to enter into the program mode Used to enter into the Set mode Also used as enter key if controller is in Set mode program mode Used to enter in display Amp mode where compressor and defrost current can be viewed Used to switch OFF ON the light Items included included e SE La NTC SENSOR 5 METER LE CATALOGUE 8 X 38 SCREW WITH RAWL PLUG 05 CRC 2052 CRC 2052 06 Fault Messages High temperature alarm for Room means room temperature is equal or above the set value of P2 parameter Low temperature alarm for Room means room temperature is equal or below the set value of P3 parameter High humidity alarm means humidity is equal or above the set value of H2 parameter Low humidity alarm Means humidity is equal or above the set value of H3 parameter Room temperature fail means Room sensor not connected or out of range Condenser temperature fail means condenser sensor not connected or out of range Lt HH Evaporator temperature fail means Evaporator sensor not connected or out of range Humidity fail means Humidity sensor not connected or out of value Compressor over load fault Compressor under load fault Auxiliar
11. defrost frequency will be for the total hours the unit has been running CRH Sum of total compressor operating times This means that for time calculation the unit will add the total time the compressor has been in an ON mode It keeps a record of the hours worked Hour incase of a power failure 14 Description of parameters and functions Sr Parameter No P13 Parameter temperature Parameter setting method Example If Defrost frequency is set to 6hrs and 3 45 hrs have passed after unit has started and power fails then defrost cycle will stat after 3 42 hours when power resumes Function To set defrost stop To change the P13 Parameter parameter press the set key Range Min Max Fact Set 50 0 C 50 0 C 4 0 C RH Parameter To change the RH Parameter parameter press the set key Range Min Max Fact Set DIS ENB DIS 15 Use UP DOWN keys to set desired value If coil Evap temperature is reached upto this temperature defrost will stop Example If this parameter is set to 7 0 C then if defrosting is in progress then when temperature reaches 7 0 C the defrost process will stop Function To enable or disable humidity sensing Use UP DOWN keys to set desired value DISABLE Humidity sensing disable ENABLE Humidity sensing enable CRC 2052 Description of parameters and functions
12. 0 A fault exists and flash on display 10 0A Compressor will be tripped on this fault D UL Parameter Function Under load limit for Heater Solenoid press the set key To change the D UL parameter Use UP DOWN keys to set desired value Example If D UL 1 0A and Heater Solenoid current is less than 1 0A then Fact Set and exists till C2 current sensing delay Range Min Max 0 0A D OL 1 0 A 1 0A then it is registered as UL fault Heater Solenoid will get OFF on this fault If 23 after 3 retries within 1 Hour current drawn is still less than 1 0Amp the Description of parameters and functions Fact Set Solenoid current is greater than 10 A Max on then and exist till C2 current sensing D UL 1 0 A on this fault C2 Parameter 38 Function Current sensing delay S Parameter Parameter setting method controller will trip the Heater Solenoid on fault and activate respective alarm relay Also display will flash D UL Controller will go in manual reset mode D OL Function Over load limit for Parameter Heater Solenoid To change the D OL parameter Use UP DOWN keys to set desired press the set key value Range Example If D OL 10 A and Heater delay then D OL fault exists and flash on display Heater Solenoid will be tripped To change the C2 parameter press the set key
13. N keys to set desired value Example If you set this parameter to 20 once the power is switched on the alarm will not activate for 20 minutes after the power is switched on This is most useful to avoid the nuisance alarms when the ambients are high when the machine is switched on after a long time 22 Description of parameters and functions Sr No EI C UL Parameter Parameter Parameter setting method Function Under load limit for compressor current press the set key To change the C UL parameter Use UP DOWN keys to set desired value Range Example If C UL 1 0A and Min Max Fact Set compressor current is less than 1 0A then and exists till C2 current sensing 0 0A C OL 1 0 A 1 0A delay then it is registered as UL fault Compressor will get OFF on this fault If C OL Parameter after 3 retries within 1 Hour current drawn is still less than 1 0Amp the controller will trip the compressor on fault and activate respective alarm relay Also display will flash C UL Controller will go in manual reset mode Function Over load limit for compressor current press the set key To change the C OL parameter Use UP DOWN keys to set desired value Range Example If C OL 10 A and compressor current is greater than 10 Athen and exist Min Max Fact Set till C2 current sensing delay then C OL C UL 18 0A 1
14. Range Example If C2 5 sec then any current fault will be valid only when it Function To enable or Disable HP sensing Parameter Use UP DOWN keys to set desired value To change the DO parameter Use UP DOWN keys to set desired va press the set key Example xeme If this parameter is set to Min Max Fact Set ENB HP sensing is enabled DIS HP sensing is disabled DIS ENB ENB J Setting this parameter to disable will ignore HP fault for compressor If this CRC 2052 will detect HP trip CRC 2052 parameter is set to Enable then controller lue 24 Description of parameters and functions Sr No 40 D1 Parameter To change D1 parameter press the set key Parameter Parameter setting method Function To enable or disable LP sensing Use UP DOWN keys to set desired value Bande Example Min Max Fact Set lf this parameter is set to ENB LP sensing is enabled DIS ENB ENB Los LP sensing is disabled Setting this parameter to disable will ignore LP fault for compressor If this parameter is set to Enable then controller will detect LP trip D2 Parameter Function Fault sensing logic To change D2 parameter press the set key Use UP DOWN keys to set desired value Range Min Max Fact Set OV 230V 230V Ov OV at HP LP AUX inp
15. Sr No DI H2 Parameter Parameter Parameter setting method Function To set allowable high humidity limit To change the H2 Parameter parameter press the set key Range Min Max Fact Set 100 100 HH Message on Display H3 Parameter Use UP DOWN keys to set desired value Once set at a particular value this will not allow the set point for Humidity to go above this value and below H3 Set value Example Setting this parameter at 70 will not allow the set point of Humidity to go above 70 Also if the humidity reaches 70 or above the display will show HH High Humidity indicating that the humidity has gone above the value in this parameter Function To set allowable low humidity limit To change the H3 Parameter parameter press the set key Range Min Max Fact Set 0 Hset 1 0 LH Message on Display H4 Parameter Use UP DOWN keys to set desired value Once set at a particular value this will not allow the set point for Humidity to go below this value and above H2 Set value Example Setting this parameter at 40 will not allow the set point of Humidity to go below 40 Also if the humidity reaches 40 the display will show LH Low Humidity indicating that the humidity has gone below the value in this parameter Function To set differential Hysterisis for humidity To change the H4 Parameter parameter press t
16. alves Hand Valves Flow Switches Solenoid Valves 00 13 03 12 TVEALNIN ASVHd A INPUT SUPPLY FAULT SIGNALS 9Q01d 1109 SENSOR 9901q puoo CT INPUT lt a oO lt a Z H oO LLI Z Z 9 a LLI Ka LLI oO oO 2 Ka a WNvIv a gt HqAlAIGINNH OUTPUTS OUTPUTS z L ZO LI dous AONI UINI
17. de display will be as per PDIS parameter To again switch to ACTIVE WORKING MODE press power switch again for 2 seconds All leds and display will flash and enter into NORMAL WORKING MODE Function To set display at power OFF mode To change PDIS parameter press the SET key Range Min Max Fact Set LED TEMP LED CRC 2052 Use UP DOWN keys to set desired value At power OFF mode power OFF LED will glow amp display will be as below LED Display Will be Blank OFF Display will show OFF TEMP Display will show Temperature 30 Description of parameters and functions Sr No Parameter Parameter setting method 57 FS Function To restore default settings of 57 Parameter the controller To change FS parameter press the SET key Use UP DOWN keys to set desired value When set to YES all parameters Range 9 are programmed to factory Min Fact Set values NO Useful to debug setting related problems EP Function To exit programming Parameter To exit programming Once the set key is pressed the parameter press the SET key controller goes into the normal mode and displays the Room Temperature and all settings are recorded 31 CRC 2052 Technical Data Data Housing Dimensions Mounting Connection Display Data Storage Power Input Options Operating Temp Storage temp Output Contac
18. denser will switch ON OFF as per compressor But if set to SP then Condenser will be OFF when condenser temperature reaches condenser SP Function To set condenser differential To change the CND4 parameter press the set key Use UP DOWN keys to set desired value Example If this parameter is set to SP and CSET Condenser set point is 20 0 deg 8 CND4 to 2 0 deg then at 20 0 degree condenser relay will be off and Range Min Max Fact Set 0 5 C 20 0 C 2 02G restart at 20 0 2 0 22 0 deg CRC 2052 18 Description of parameters and functions Sr No 22 CND5 Parameter Parameter Parameter setting method Function To set condenser probe calibration To change the CND5 parameter press the set key Range Min Max Fact Set 10 0 C 10 0 C 0 0 C CND6 Parameter Use UP DOWN keys to set desired value In time it may be possible that the display for condenser may be offset by a deg or so To compensate for this error you may need to add or minus the offset required to achieve the correct condenser temperature Example The temperature on the display is 28 0 C whereas the actual temperature is 30 0 C You will need to set the CND5 parameter to 2 0 C which means that once out of the programming mode the temperature will show 30 0 C 28 0 C 2 0 C Function To set condenser on delay timi
19. e To give a correct reading the probe must be installed in a place protected from thermal influences which may affect the temperature to be controlled BEZE v m WIRING The probe and its corresponding wires should never be installed in a conduit next to control or power supply lines The electrical wiring should be done as shown in the diagram The power supply circuit should be connected to a protection switch WARNING Improper wiring may cause irreparable damage and personal injury Kindly ensure that wiring is done by qualified personnel only Maintenance Cleaning Clean the surface of the controller with a soft moist cloth Do not use abrasive detergents petrol alcohol or solvents CRC 2052 34 EZ TT TT The information in this document is subject to change in order to improve reliability design or function without prior notice and does not represent a commitment on the part of the company In no event will the company be liable for direct indirect special incidental or consequential damage arising out of the use or inability to use the product or documentation even if advised of the possibility of such damages No part of this manual may be reproduced or transmitted in any form or by any means without the prior written permission of the company EZE 7 This manual amp its contents remain the sole property of A S Controls Pvt Ltd India and shall not be reproduced or distributed without authorization
20. et condenser probe calibration EI N O DIE N gt e This parameter is used to set power on delay for alarm Under load limit for compressor current Over load limit for compressor current 2 Under load limit for Heater Solenoid 23 2 CRC 2052 02 N N N A Index PARAMETER DESCRIPTION Gurentsensnadeky JL To enable or Disable HP sansng 2 Fo enable or disable LP sensing 2 Fatze N ojo N gt To set LP sensing delay 2 To set reset mode for HP fault 2 To set Compressor Relay status on 2 Probe Failure m 5 N Zz To set On cycle at room probe fail To set Off cycle at room probe fail To set Display at defrosting m Defrost duration during Coil probe failure To set time delay to switch off the light U el To activate Solenoid Valve relay To change password To view Compressor run Hours 0 EX To restore default settings of the controller End of programming Technical Data Caution amp Warranty Suggested Connection Diagram 03 CRC 2052 v 4 4 4 5 5 5 6 6 7 7 7 8 8 8 9 9 9 9 0 2 2 2 2 2 2 2 2 2 2 3 al 27 27 2e 28 28 29 29 29 29 30 m 0 g w 2 4 w w 31 w w a Introduction The CRC 2052 is single set point cold room controller The Sub Zero CRC 2052 is aesthetically superior versions of their predecessors
21. he set key Range Max Fact Set CRC 2052 Use UP DOWN keys to set desired value Example If the set point is set at 60 and differential is set at 3 then when the system reaches 60 the Relay will cut out Since the differential is 3 the relay will cut in restart at 63 60 3 16 Description of parameters and functions Sr No Parameter H5 Parameter Parameter setting method Function To set probe calibration for humidity To change the H5 Parameter parameter press the set key Range Min Max Fact Set 10 10 0 H6 Parameter Use UP DOWN keys to set desired value In time it may be possible that the display for Humidity may be offset by a or so To compensate for this error you may need to add or minus the required to achieve the correct Humidity Example The Humidity on the display is 40 whereas the actual Humidity is 42 You will need to set the H5 parameter to 2 which means that once out of the programming mode the Humidity will show 42 40 2 Function To set time delay between relay restart time for humidity To change the H6 Parameter parameter press the set key Range Min Max Fact Set 1 Min 20 Min 2 Min 17 Use UP DOWN keys to set desired value This parameteris used to protect the Humidifierfrom restarting in a short period oftime Example If
22. ngs To change the CND6 parameter press the set key Range Min Max Fact Set CND7 Parameter Use UP DOWN keys to set desired value When Compressor delay over Condenser Fan will come ON first after cond On delay over Comp will come ON Function To set condenser status at hot gas defrost To change the CND7 parameter press the set key Use UP DOWN keys to set desired value This function is used to decide the condenser status when hot gas defrost is Range Min Max Fact Set OFF ON OFF on This parameter is not applicable for Heater defrost At hot gas defrost OFF Condenser will be OFF Description of parameters and functions Sr No B L1 Parameter Parameter Parameter setting method Function To set Evaporator Fan stop temperature To change the L1 parameter press the set key Use UP DOWN keys to set desired value This setting is used to limit the max Range temperature beyond which the Evap Fan Min Max Fact Set wil cut off 50 0 C 50 0 C 2 0 C Example If this parameter is set to 2 0 C then Evap Fan will cut off at 2 0 C L2 Function To set Evaporator Restart Parameter Delay To change the L2 parameter press the set key Use UP DOWN keys to set desired value Range Example If this is set at 3 minutes Evap Fan relay will cut off at the set by Min Ma Fact Set 5 Eva
23. o set value The set point value can now be changed by using the UP DOWN key After desired value press the SET key 8 you will see which confirms that the set point has been stored in memory To set the quick freeze set point To change QFS parameter press the set key Range Min Max Fact Set 50 0 C SP 5 0 C CSET Use UP DOWN keys to set desired value If controller is in quick freeze mode then compressor will cut in cut out as per this set point till the quick freeze duration is over SP Set Point To set the Condenser set point To change CSET parameter press the set key Range Min Max Fact Set 0 0 C 99 9 C 20 0 C 09 Use UP DOWN keys to set desired value If condenser logic is set to SP then condenser will switch off at this set point CRC 2052 Description of parameters and functions Sr No HSET Parameter Parameter setting method Function To set cut out point of the controller for Humidity To change EXIT parameter press the set key Range Min Max Fact Set H3t1 H2 1 70 ER EXIT End of set mode To set other parameter Use UP DOWN keys to set desired value Example If this parameter is set to 70 then humidifier will be off at this humidity 2 seconds P2 Parameter Press amp hold PRG key for Display will show P2 and scroll the descripti
24. on of the parameter To go to other parameters use up down keys Function To set allowable high temperature limit press the se t key To change P2 parameter Range Min Max Fact Set SP 0 5 C 50 0 C 50 0 C HT Message on Display CRC 2052 Use UP DOWN key to set desired value Once set at a particular value this will not allow the set point to go above this value and below P3 setting Example Setting this parameter at 30 0 C will not allow the set point to go above 30 0 C also if the temperature reaches 30 0 C the display will show HT High Temperature The alarm will be ON But at power on till the AL delay is over controller will not generate HT Alarm 10 Description of parameters and functions Sr No P3 Parameter Parameter Parameter setting method Function To set allowable low temperature limit To change P3 parameter press the set key Range Min Max Fact Set 50 0 C SP 0 5 C 50 0 C LT Message on Display P4 Parameter Use UP DOWN key to set desired value Once set at a particular value this will not allow the set point to go below this value and above P2 setting Example Setting this parameter at 30 0 C will not allow the set point to go below 30 0 C also if the temperature reaches 30 0 C the display will show LT Low Temperature The alarm will be Function
25. p Fan Stop TC Parameter but the 0 Min 20 Min 1Min Fan will not come on for a minimum of 3 L3 To change the L3 parameter press the set key minutes even if it s differential is achieved earlier Function To set Evaporator Fan status at compressor off Use UP DOWN keys to set desired value OFF Evaporator Fan will be Off at 19 ON Condenser will be ON CRC 2052 Range compressor OFF Min Max Fact Set ON Evaporator Fan will be On at compressor OFF OFF ON ON CRC 2052 20 Description of parameters and functions Sr No Parameter B L4 Parameter Parameter setting method Function To set Evaporator Fan differential To change the L4 parameter press the set key Range Min Max Fact Set 0 5 C 20 0 C 2 0 C L5 Parameter Use UP DOWN keys to set desired value Example If Evaporator Fan Stop Tc parameteris set to 2 0 C and if EVAP DIFFERENTIAL parameter is set to 2 0 C then Evap Fan will cut off at 2 0 C and restart only at 0 0 C 2 0 C 2 0 C 0 0 C Function To set Evaporator probe calibration To change the L5 parameter press the set key Range Min Max Fact Set 10 0 C 10 0 C 0 0 C L7 Parameter Use UP DOWN keys to set desired value In time it may be possible that the display may be offset by a degree or so To compensate for
26. st cycles Min Max Fact Set Example same as P7 parameter 1Hr 31 Hrs 6 Hr P9 Function To set power on defrost delay Parameter To change the P10 Parameter parameter press the set key Range Min Max Fact Set HTR P11 Parameter Use UP DOWN keys to set desired value HTR Heater defrost where compressor is OFF HTG Hot Gas defrost where compressor is ON Function To set drip time for defrost To change the P11 Parameter parameter press the set key Range Min Max Fact Set 0 Min 30 Min 1 Min P12 Parameter Use UP DOWN keys to set desired value During this period Compressor Evaporator Fan LSV relay and Heater will stay off so that the defrost water can drain out Function To set type of computation for defrost time To change the P9 Parameter parameter press the set key Range To change the P9 Parameter Use UP DOWN keys to set desired value parameter press the set key This is the amount of time at power on Range after which defrosting will take place once Min Max Fact Set Example If P9 parameter is 30 mins Sr een SS then at power after 30 mins defrosting will take place once 13 CRC 2052 Min Max Fact Set REAL CRH REAL CRC 2052 Use UP DOWN keys to set desired value REAL Total of real time Example This means that the time calculation for
27. this error you may need to add or minus the degrees required to achieve the correct temperature Setting value is from 10 C to 10 C Function To set Compressor Evaporator Fan status at Door open condition To change the L7 parameter press the set key Range Min Max Fact Set NORM F C NORM 21 Use UP DOWN keys to set desired value At Door Open NORM Normal FAN Evaporator Fan Off COMP Compressor Off F C Compressor and Evaporator Fan Off CRC 2052 Description of parameters and functions Sr No L8 Parameter Parameter Parameter setting method Function To set Evaporator Fan status during defrost To change the L8 Parameter parameter press the set key Range Min Max Fact Set OFF ON OFF BUZ Parameter Use UP DOWN keys to set desired value OFF Evaporator Fan Off during defrost ON Evaporator Fan On during defrost Function To enable disable buzzer To change the BUZ Parameter parameter press the set key Range Min Max Fact Set DIS ENB ENB AL Parameter Use UP DOWN keys to set desired value Example ENB Buzzer enabled DIS Buzzer disabled Function This parameter is used to set power on delay for alarm To change the AL Parameter parameter press the set key Range Min Max Fact Set 0 Min 99 Min 30 Min CRC 2052 Use UP DOW
28. tors Comp amp Def Contactor Evap Condenser Relay Light Relay Alarm Relay Humidifier Relay Sensors 1 Temperature sensor Sensor Type Resolution Accuracy Probe Tolerance at 25 C ABS Plastic 400 x 300 x 135 mm Wall mounting Spring clamp terminal block 4sq mm wire 4 Digit 1 Dot matrix Display and 14 LEDs for indication Non Volatile EEPROM Memory 415Vac 10 50 60Hz 3Phase Supply with Neutral 5 C to 50 C non condensing 20 C to 70 C non condensing 18A 9A 10A 250Vac 10A 250Vac 5A 250Vac 10A 250Vac NTC Thermistor 01 C 1 C 0 3 C Room amp Evap Temperature Range Condenser Temperature Range 2 Humidity sensor Sensor Type Range Resolution Analog Up 50 0 C to 50 0 C 0 O C to 99 9 C 4 20mA out 0 to 100 i 1 Compressor current R Y B Defrost current R Y B Resolution Accuracy CRC 2052 0 1Amp 1 Amp 32 Technical Data Data Digital Inputs HP LP Auxillary Door Sppr R Ph Y Ph B Ph Buzzer Internal RS485 Connectivity Modbus RTU Protocol Baud Rate 9600 Device ID 1 By Default 33 CRC 2052 lt lt _ m Controller should be installed in a place protected by vibration water and corrosive gasses and where ambient temperature does not exceed the values specified in the technical data Probe rob
29. ut will be sensed as fault and trip the compressor 230V 230V at HP LP AUX input will be sensed as fault and trip the compressor D3 Parameter Function To set LP sensing delay To change D3 parameter press the set key Use UP DOWN keys to set desired value Range Example If this parameter is set to 5 sec then LP fault will be sensed only Min Max Fact Set when it present continuously for 5 Secs 180 Sec 30 Sec 25 CRC 2052 Description of parameters and functions Sr No B D4 Parameter Parameter Parameter setting method Function To set reset mode for HP fault To change D4 parameter press the set key Range Min Max Fact Set E1 Parameter Use UP DOWN keys to set desired value MAN Manual Mode AUTO Auto mode If this parameter set to MAN mode HP fault will be cleared only after pressing reset key for 2 seconds If this parameter is set to AUTO mode HP fault will be cleared automatically when it is healthy Function To set Compressor Relay status on Probe Failure To change E1 parameter press the set key Range Min Max Fact Set ON OFF CYC TON Parameter Use UP DOWN keys to set desired value When set to ON Relay will stay ON CYC Relay performs a duty cycle of as per TON 8 TOFF OFF Relay will stay OFF
30. y fault 07 CRC 2052 LED Indication Indication messages lee On Comp Relay On sk Off Comp Relay Off Flashing Comp Relay Timedelay On Cond Relay On Off Cond Relay Off Evap Relay On Evap Relay Off Evap Relay Timedelay Defrost Relay On Defrost Relay Off Defrost Relay Timedelay LSV Relay On LSV Relay Off On Alarm Relay On Off Alarm Relay Off Flashing Controller is in drip time On Humidifier On Humidifier Off Humidifier is in Timedelay Controller is in quick freeze mode Controller is not in quick freeze mode Power Off Power On Light Relay On Light Relay Off R phase present R phase absent Y phase present Y phase absent B phase present B phase absent Controller is in emergency stop mode Controller is not in emergency stop mode Emergency Stop CRC 2052 08 Min MINIMUM Max MAXIMUM Fact Set FACTORY SETTING DEFAULT Description of parameters and functions Sr NG Parameter Parameter setting method To set other parameter Press amp hold SET key for 2 seconds g description of the parameter Display will show SET and scroll the To go to other parameters use up down keys To set the cut out point of the controller To change Set Point parameter press the set key Range Min Max Fact Set QFS P2 0 5 C 0 C QFS Display will change t
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