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Carel Application software for pCO1, pCO2, pCO3, pCOxs Standard

1. Flow INDEX Description Fow INDEX Description R 2 Presence of expansion board RW 105 Enable fan inverter R 3 Status of fan 1 RW 106 Enable ON OFF from digital input R 4 Status of fan 2 RW 108 Request entry of default values R 5 Status of fan 3 RW 110 Capacity control logic H 6 Status of fan 4 RW 111 Select ON OFF from supervisor R d Status of compressor 1 RW 112 Enable ON OFF from supervisor R 8 Status of load step 1 compressor 1 RW 113 Enable liquid level alarm R 9 Status of load step 2 compressor 1 R 114 Status of fan 5 R 10 Status of compressor 2 R 115 Alarm thermal overload on fan 5 R 11 Status of load step 1 compressor 2 R 116 Enable ON OFF from the keypad R 12 Status of load step 2 compressor 2 RW 117 Enable alarm relay R 13 Status of compressor 3 RW 118 Enable restart delay after a Blackout R 14 Status of load step 1 compressor 3 R 119 Status of digital output 1 R 15 Status of load step 2 compressor 3 R 120 Status of digital output 2 R 16 Status of compressor 4 R 121 Status of digital output 3 R 17 Status of load step 1 compressor 4 R 122 Status of digital output 4 R 18 Status of load step
2. 9 6 1 Read Send from the pCO to the supervisor RAN Read Write Received and sent from the pCO to the supervisor Analogue variables Flow INDEX Description Flow INDEX Description R 1 Suction pressure R 52 Current monthly energy consumption x 1 000 000 000 R 2 Discharge pressure H 53 Current annual energy consumption x 100 R 3 Value of analogue output 1 H 54 Annual energy consumption x 1000 R 4 Value of analogue output 2 R 55 Previous daily energy consumption x 100 RW 5 Compressor setpoint H 56 Previous daily energy consumption x 1000 RW 6 Compressor differential H 57 Previous monthly energy consumption x 1000 RW 7 Fan setpoint R 58 Previous monthly energy consumption x 1 000 000 000 RW 8 Fan differential R 59 Previous annual energy consumption x 1000 R 9 Voltage supplied to the pCO board R 60 Previous annual energy consumption x 1 000 000 000 RW 10 Max compressor setpoint R 61 Total energy consumption x 100 RW 11 Min compressor setpoint R 62 Total energy consumption x 1000 RW 12 Max fan setpoint H 63 Total energy consumption x 1000 RW 13 Min fan setpoint R 64 Energy consumption over period of time x 100 RW 14 High suction pressure alarm threshold R 65 Energy consumption over certain period of time x 1000 RW 15 High
3. Password Manufacturer Enter manufacturer password 0 9999 1234 CONFIGURATION gt pLAN multischeda DI C2 Enable multiboard mode compressor on board1 fan S N N on board 2 Type of safety devices per RAW C3 Get the type of safety devices per compressor 4 1 compressor 1 Generic 2 Thermal overload Oil differential 3 Thermal overload High low pressure switch 4 Thermal overload High low pressure switch Diff Oil Config number of fans RAV C4 Set number of fans 0 16 4 Config number of RAW C4 Setnumber of compressors 0 6 3 compressors Config number of RAW C4 Setnumber of load steps 0 9 0 Load steps Compressors of different RAN Ci Enable compressors with different capacities Y N N capacities Compressor inverters RAW C5 Enable compressor inverters if configured without load steps Y N N Fan inverters RAW C5 Enable control of fans with inverters Y N Fan inverters 0 10V Y1 RAW C5 Type of output used for fan inverters Only on pCO pCO 0 10V Y1 PWM Y3 Enable alarm relay RAW C6 Enable alarm relay Y N Y Enable auxiliary pump RAW C6 Enable auxiliary pump management Y N N Enable clock card R W C6 Enable clock card if pCO pCO S Y N Y Enable inputs RAV C7 Enable inputs Y N Y Gen pressure switch Gen LP general low pressure switch pressure switch HP general high pressure switch Enable ON OFF inputs from HA C8 E
4. m 9 6 CC 010 EEN 10 The supervisor e EE 10 1 Serial cards 10 2 COMMUNICATION POLO COIS MEM 34 10 3 Other OTOL EE 34 11 User interface e EENEG A awh anal 35 11 1 pe 35 12 Merge Eu EEEE 37 13 Supervisor commu ricatior EE 46 14 PE TWes n EIE 50 141 Default for pCO board 50 14 2 Default for SMALL Pco Pco board 143 Default for pCO1 pCO2 MEDIUM board 144 Default for PCOS LARGE Giger coche ree ARREK sek ue Ee uk eb M emet ele MU Lee IN tt ie DR RS 53 15 ER e ECHT 54 16 GOSS APY eee oe RO e ee a tad entem ota tat bed m aeu e t te apt i bees ae dde en 57 Standard compressor packs 1 The program 1 1 Main new features in version 2 0 New functions 1 Compressors inverter management improve with neutral zone manage 2 Faninverter management improve 1 2 Main characteristics The FLSTDMFCOA Compressor pack application software for pCO pCO pCO pCO provides the complete management of a compressor pack with the following characteristics Main functions e Control of the suction pressure of the compressors e Control of the condensing pressure compressor discharge e Management depending on the number of outputs available of up to six compressors with up to three load steps
5. Devices Board 1 Board 2 Probe suction Probe discharge Alarm probe suction Alarm probe discharge Main pressostat hi and low Manage prevent discharge Safety on single compressor Safety in single fan Digital output compressor Digital output fan Inveter compressor Inveter fan Setpoint compressor change from DIN Setpoint fan change from DIN Enable from digital input For enable this function will be necessary addressing the board and enable the parameter Multiboard costructor mask C2 The pLAN network could be compose from any hardware compatible with the software An example could be to use a pCO3 large board for the compressor and one pCOxs for the fan See the follow PLAN network shema On the main mask will be visible Address pLAN of the board Compressor State Fan State Probe suction state Probe discharge state Note 1 Every pCO will have his serial board for the communication with the supervisor Note 2 Forthe pLAN addressing and the hardware connection will see the manual of pCO 4 1 Terminal use in pLAN By only one external terminal shared is possible control all the board in pLAN For change unit with 14 keys terminal is necessary push the key INFO The software will go on mask f0 If you use a keyboard with 6 keys yuo need to go on the main men and enter on change unit With the terminal Built In is not possible see the data of another board Cod 030221991 rel 2 6 01 0
6. MEDIU MEDIU NIN LARG Rofo eleloo LARG LARG LARG ajo Od Od Gd Gd Gd Gd Gd Gd GD GD GD GD MD MD oD M3 i i ioioilo loiooioco GO RO CO CO Co L LARG CO MI OJ ON BJ CO RO CO MD ON I CO PO Table 14 2 Centrale Frigo Standard 16 Glossary Suction pressure or temperature measured at the inlet to the compressors It is an analogue value Proportional band this defines a temperature or pressure zone around the set point within which the system manages the control devices Buzzer audible buzzer fitted on the external terminals this emits a sound in the event of alarms or if the limits for setting the parameters are exceeded The Built in or PGDO terminals are not equipped with it Differential defines a hysteresis pressure or temperature value of the corresponding setpoint Step this defines an area of the proportional band temperature or pressure inside which a device is on and at the same time also defines the activation and deactivation values of the device HP high pressure Screen index alphanumeric index located in the top right of every screen LP low pressure Outlet pressure or temperature measured at the outlet to the compressors It is an analogue value Screen the page shown on the display of the terminal Branch loop series of screens that co
7. ESI Input configured by software CAREL NTC temperature probes 50T100 C R T 10 kW at 25 C Probes with current signal 0 20 mA Input configured by software ee 0 i e Input configured by software CAREL NTC temperature probes 50T1 Probes with current signal 0 20 mA B9 Input configured by software Used as a digital output Input configured by software Tab 3 1 When using a pCO1 controller check that the dipswitches used on the board for the configuration of the type of analogue inputs are positioned correctly for further information refer to the pCO1 installation manual Analog output Outputs Description Fan controller Y2 Compressor controller Y3 PWM fan controller only on pCO pCO Table 3 2 Cod 030221991 rel 2 6 01 04 09 13 Standard compressor packs 4 pLAN The software is structured for work with only one board and with a pLAN board connected between One possibile configuration could be betweeen two standard compressor pack low and medium temperature that use pLAN network to get only one teminal shared Anther solution could be divide the control between two board menaging the compressor on the first board and the fan on the second board That use is necessary when you haven t enought HU in only one board or is necessary install a board for the fan near the battery of capacitor and by pLAN only tree wire link to the first board near the compressor
8. automatic settable _ display only AL098 Compressors OFF AL099 AL100 settable display only AL101 Superheat low AIN manual settable display only AL111 Termic klixon generic compressor 11 D OFF comp 11 settable settable AL112 Termic klixon generic compressor 12 D OFF comp 12 settable settable Cod 4 030221991 rel 2 6 01 04 09 32 Standard compressor packs 9 6 Alarm log The alarm log is used to save the operating status of the standard compressor pack when the alarms are generated Each record represents an event that can be displayed from the list of all the events available in the memory The log proves useful in solvign problems and faults because it can suggest possible causes and solutions for the problems If no clock card is fitted optional on the pCO pCO and pCO standard on the pCO the BASIC log only displays the alarm message A maximum number of 150 events can be saved Once the maximum number of events has been reached the new events overwrite the oldest ones The alarm log can be deleted completely in screen B2 maintenance branch When the default values are installed also the alarm log is completely deleted The alarm log screen can be accessed by pressing the PRINT button or entering from the main menu and has the following layout i N 001 15 45 10 09 04 iReset manuale allar ILP 401 5b Hp 15 5b l l l l i For each alarm the following data are saved corre
9. Associate the relays to the devices managed based on the selected configuration C4 The system will automatically search for the first free position in the digital outputs otherwise the user can scroll the list using the UP DOWN buttons The user can decide which relays to use for the various devices e g first a compressor then a load step then a fan and so on without needing to modify the electrical system and in any case freely deciding upon the use of the outputs Once having completed this operation proceed to the configuration of the digital inputs NOTE for configuration with the Built in or PGDO terminal follow the procedure explained while referring to the corresponding buttons Input configuration To go back one level press MENU once Devices INPUT POSITIONS then Output positions The user can decide which inputs to use for the various safety devices Example If input 6 is used for the compressor thermal overload simply go to the screen DO move to the row Thermal comp 1 ID 00 and choose number 6 from the possible free inputs Note the software does not allow two devices to be connected to the same input To reverse two devices a free input needs to be used also see input configuration CONFIGURATION section The user can decide if the inputs are normally closed when an alarm is present the contact is open or normally open when an alarm is present the contact is closed screen GO In additi
10. n m manual settable AU Oil differential comp 4 f DN Comp4oFF manual settable AL035 Oildfferenilcomp5 DN TI Comp50Ff manual settable ALO36 Oil differential comp 6 DN f Comp6OF manual settable AL041 Liquid level DN if Sap ul manua settable AL042 General suction pressure switch DN All comp OFF automatic AL043 High freq Low pressure switch intervention DIN All comp OFF manual no frequency settable AL044 General supply pressure switch D All comp OFF Settable no AL051 manual no display only AL052 Comp maintenance 2 system display only AL053 Comp maintenance 3 manual display only AL054 Comp maintenance 4 system display only AL055 Comp maintenance 5 display only ALO56 Comp maintenance 6 system display only AE ALO62 A ALO64 ALO66 power at 100 fan inverters AL067 automatic display only AL068 automatic display only AL069 B7 probe broken or disconnected AIN automatic 30 seconds display only AL071 automatic display only AL072 automatic display only A ALO74 display only AL075 display only ALS ran OFF ALOB2 Fan 2 OFF manual AL083 Fan 3 Thermal cutout Fan 3 OFF ALOBA Fan 4 OFF AL085 Fan 5 Thermal cutout Fan 5 OFF ALO86 Fan 6 Thermal cutout Fan 6 OFF ALOB7 Fan 7 OFF ALOB8 Fan 8 OFF AL089 Fan 9 Thermal cutout Fan 9 OFF manual ALO90 ron 10 Thermal cutou ALO91 AL092 ien 12 Thermal cutou AL093 ALO94 AL095 Fan 15 Thermal cutou ALOSE AL097 Refrigerant gas leak DN
11. on of the alarm digital output on the card 0 8 13 8 Card pos Aux pump no Cod 030221991 rel 2 6 01 04 09 Positi on of the auxiliary pump on the card 43 0 8 13 8 Standard compressor packs Parameter Type Screen Description UOM Range Default Note position PARAMETERS Logic digital inputs N A Nol RAW GO Digital input logic setting Normally opened the contact is open in N O N C N C alarm non alarm conditions Logic ON OFF from digital RAW G1 Remote ON OFF logic setting Normally opened unit in OFF position N O N C N O input from digital input Type of compressor alarms DAN G2 Type of thermal overload general alarm reset belonging to single auto manual manual reset compressor Automatic the compressor re starts when alarm stops thermal overload Can be see if the parameters are enabled Type of compressor alarms DAN G2 Type of high low pressure switch reset belonging to single auto manual manual reset compressor Automatic the compressor re starts when alarm stops HP LP pressure switch Can be see if the parameters are enabled Prevent high discharge RAW G3 Enables high suction pressure prevention disabled Disabled pressure enabled Set point RAW G3 High suction pressure prevention setpoint bar 0 99 18 0 Alarm relay logic RAW G
12. press Capacity _ required EE Differential 6 2 2 Dead zone control with different capacity compressors The software will calculate the maximum number of combinations possible with the compressors available At certain intervals of time see the paragraph Compressor dead zone with variable times the software will call a sequence with a higher capacity In the deactivation phase the opposite will occur while in dead zone no compressors will be started or stopped An increase in the requirement will correspond to a different combination Key DOffZ Device deactivation zone DOnZ DOnZ Device activation zone NZ Dead zone DZN Dead zone differential InPress Suction pressure read SP Set point compressors S2 fans S1 InPe ss DZN b Fig 5 3 6 2 3 Example of compressors with different capacities The following example looks at an installation featuring 3 compressors with different capacities using proportional band control As can be seen there are 8 possible combinations available Set point 1 0 Bar Pressure Requirement Comp1 Comp2 Comp3 Total active capacity Differential 20 bar bar kW 5 kW 7 kW 15 kW kW 1 1 1 35 X 5 1 5 6 7 X 7 1 8 10 8 X X 12 2 13 5 X 15 2 1 14 85 X 15 24 18 9 X X 20 2 5 20 25 X X 22 3 2T X X X 27 Table 6 2 6 2 4 Enable compressors from the screen Maintenance branch screen BG A compressor can be temp
13. R600a 2 methyl propane isobutane R717 Ammonia NH3 R744 Carbon dioxide C02 R404A R407C R410A R507C Mixes of gases Table 7 2 The same screen is used to select whether to convert the dew point or the boiling point 8 10 Auxiliary probe management Manufacturer branch device configuration screen Ce input configuration Dh Di The software can manage up to six auxiliary probes Their positions can be set and they depend on the free inputs and the type of card used They are Sensor pC02 small pC02 medium large DU small DU medium pCOxs Room temperature Outside temperature B3 B3 B6 B7 B8 B3 B4 B3 B4 B7 B8 B3 B4 General temperature Suction temp Gas leak probe ES B3 B3 B6 B7 B8 B3 B4 B3 B4 Electrical absorption FS Table 8 3 The gas leak and electrical absorption probes are active 4 20mA and their limits can be set on the screens Cf Cg If the general probe is configured its name can be personalised on the screen Ce The suction temperature probe is used to calculate the superheat and generate an alarm if necessary Once the probes are enabled the value read can be seen in the 1 0 branch Cod 030221991 rel 2 6 01 04 09 29 Standard compressor packs 8 11 Energy consumption control function Function not available on the pCOxs To monitor and manage energy consumption the power consumption sensor must be enabled on screen Ce A CT
14. Start sampling yearly power consumption eo 12 yearly Elect absor R W Ph Start sampling power consumption at hour minutes 0 23 8 Start daily zone 0 59 Elect absor RAW Ph End sampling power consumption at hour minutes 0 23 20 Zone day end 0 59 Evaporator RAN Pi Evaporation temperature D 99 9 Set 265 Evap temp comp C Delta Eff Evap RAN Pi Evaporator efficiency 96 0 99 3 Condenser RAN Pj Condensing temperature C Fan set 430 Cond temp C 999 Delta Eff Cond HAN Pk Condenser efficiency 0 99 2 Compressors RAW Pr Enable compressor modulating setpoint from supervisor Y N N Modulating setpoint Compressors RAW Pr Maximum change to the setpoint allowed to supervisor bar C 0T99 9 0 1 Max Delta change Compressors RAW Ps Delay between one setpoint change and another with supervisor S 0T99 9 20 Setpoint reduct time offline with supervisor offline Condensation RAW Pt Enable fan modulating setpoint Y N N Modulating setpoint Condensation RAW Pt Offset to be added to outside temperature to get fan setpoint bar C 0T99 9 0 1 Outside temp offset Enter new password RAW Pk Enter a new user password 0 9999 0 Cod 030221991 rel 2 6 01 04 09 41 SCREENS MANUFACTURER 15 button terminal MENU PROG button 6 button terminal PROG button and MANUFACTURER in the menu Standard compressor packs Parameter Type Screen Description UOM Range Default Note position
15. 01 04 09 42 Standard compressor packs Parameter Type Screen Description Range Default Note TUE For enabling external temperature probes For enabling general probes or gas probe Y N Probe full scale setting for power consumption Y N Gas leak detection probe full scale setting 999 9 999 9 Refrigerant conversion Type of refrigerant used See relevant paragraph R22 R134a R404a R407c R410a R507 R290 R600 R600a R717 R744 Enable efficiency control POSITION OF INPUTS es efficiency control of the compressor pack Position of the digital inputs used as thermal overload for compressor 1 2 12 1 Position of digital inputs used as oil differentials compressor 1 2 6 HP LP pressure switch 1 Position of digital inputs used as HP LP pressure switch compressor 1 2 6 Card pos Thermal overload Position of digital inputs used as safety devices for fans 1 2 16 Card pos ON OFF digital input Position of the ON OFF digital input on the card Parameter can be seen only if enabled Card pos Liquid level alarm Position of the liquid level alarm on the card Parameter can be seen only if enabled Card pos Gen LP pressure switch Gen HP pressure switch Position of high and low pressure switches on the card Parameters can be seen only if enabled Position of the common oil differential on the card Parame
16. Device used like on for the pumps Standard compressor packs Parameter Type Screen Description Range Default Note ee Always On Unit On Comps On Fans On Always On Time rotation between pumps 0 999 Dalay off pump after require off 0 9999 Time between requests to turn off Time between requests to turn off compressors with high pressure prevention active Minimum time compr ON inimum same compressor on time Minimum time compr OFF Same compressor minimum OFF time Min time between different compressor starts inimum time between two ON requests of different compressors They prevent simultaneous starts inimum time between two actual power ups of same compressor in time ON compressor under inverter ime OFF compressor under inverter Time min between two ON compressor under inverter Time between requests to turn off fans Minimum time between two subsequent deactivation requests of different fans Can be seen only if dead zone is set Minimum time between different fan activations Minimum time between different requests to turn fans on It prevents simultaneous starts Fan inverter speedup time Inverter vent Fan inverter Speedup time that can be seen only if fan inverter is set Set CutOFF inverter fan Necessary with PI Comunication speed Supervisor configuration Speed of communication with the supe
17. Pco2 board Inputs Devices 1 input per fan 4 fans 1 input per compressor 3 compressors Liquid level alarm 0 load steps fan inverters Signal Type of analogue inputs Description B1 universal analogue input 1 suction pressure probe universal analogue input 3 Discharge pressure probe universal analogue input 3 fa passive analogue input 4 NTC PT1000 ON OFF general low pressure switch passive analogue input 5 NTC PT1000 ON OFF general high pressure switch NTC 0 1 V 0 10 V 0 20 Ma 4 20 Ma 0 5 V Pco Table 13 5 Y2 Amlogeouputno20t0 10V S ooo Y3 Analogue output no 3 PWM ony pCO LI Table 13 6 Type of digital inputs no 1 Thermal overload comp 1 D5 Digital input no 5 ixon thermal overload fan 4 1D7 Digital inpu 7 Klixon thermal overload fan 2 igital i 8 0 Digital input no Klixon thermal overload fan 1 D2 D3 D4 D5 igital i D7 D8 Table 13 7 Normally open contact relay no 1 Normally open contact relay no 3 No6 08 ormally open contact relay no 5 ormally open contact relay no 6 ormally open contact relay no 7 ormally open contact relay no 8 Fan 1 Table 13 8 Cod 030221991 rel 2 6 01 04 09 51 Standard compressor packs 14 3 Default for pCO1 pCO2 MEDIUM board Inputs Devices 1 input per fan 4 fans 1 compressor thermal overload and 1 oil differential 4
18. codes of the alarms that were activated simply take a look at the alarm log press the MENU or PROG button on the Built In or PGDO terminal alarm log branch 9 2 Alarms with manual reset When one or more manual reset alarms are detected these are signalled by e red LED under the ALARM button on e buzzer active with external terminal e change of status of the alarm relay if enabled Pressing the ALARM button mutes the buzzer and displays the active alarm screens If the cause of the alarms has been resolved the red LED stays on to inform the user that alarms have been activated during the day and to press the ALARM button to reset this situation In this situation the alarm relay remains in an alarm condition If in this situation new alarms are activated the initial situation will return The devices remain off until the user deletes the alarm messages The messages are deleted by pressing the ALARM button when the alarm messages are displayed If the causes no longer exist the status of the signal devices changes e the alarm relay changes status switches according to the set logic e the buzzer if not silenced by pressing the ALARM button stops e the red LED under the ALARM button goes off If on the other hand the cause of the alarms is still present the initial situation will return 9 3 Semiautomatic alarms The low pressure switch alarm is a semiautomatic alarm It acts as an alarm with automatic reset howev
19. screen displayed and saving of the event To monitor the active alarm simply press the ALARM button and use the UP DOWN buttons to scroll any other active alarms To reset the relay and delete the alarms in the memory first display the alarm screen and then press the ALARM button again The alarm from digital input arises when there is no voltage at the corresponding terminal if the parameter input logic is configured as normally closed Manufacturer branch general parameters screen GO 9 1 Alarms with automatic reset When one or more automatic reset alarms are detected these are signalled by e red LED under the ALARM button on e buzzer active with external terminal e change of status of the alarm relay the logic can be set in the manufacturer branch general parameters screen G4 if enabled manufacturer branch unit configuration screen C6 Pressing the ALARM button mutes the buzzer and displays the active alarm screens If the cause of the alarms is resolved the devices that have shutdown will restart normal operation and the status of the signal devices changes e the alarm relay changes status e the buzzer if not silenced by pressing the ALARM button stops e the red LED under the ALARM button flashes If in this situation new alarms are activated the initial situation will return The red LED flashing informs the user that there have been active alarms during the day and that the causes have now passed To display the
20. 2 compressor 4 R 123 Status of digital output 5 R 19 Status of compressor 5 R 124 Status of digital output 6 R 20 Status of load step 1 compressor 5 R 125 Status of digital output 7 R 21 Status of load step 2 compressor 5 R 126 Status of digital output 8 R 22 Status of compressor 6 R 127 Status of digital output 9 R 23 Status of load step 1 compressor 6 R 128 Status of digital output 10 R 24 Status of load step 2 compressor 6 R 129 Status of digital output 11 R 25 Status of digital input 1 R 130 Status of digital output 12 R 26 Status of digital input 2 R 131 Status of digital output 13 R 27 Status of digital input 3 R 132 Status of digital output 14 R 28 Status of digital input 4 R 133 Status of digital output 15 R 29 Status of digital input 5 R 134 Status of digital output 16 R 30 Status of digital input 6 R 135 Status of digital output 17 R 31 Status of digital input 7 R 136 Status of digital output 18 R 32 Status of digital input 8 RW 138 Enable electronic expansion valve R 33 Status of digital input 9 RW 139 Enable outside air temperature probe R 34 Status of digital input 10 RW 155 Enable preventive control R 35 Status of digital input 11 R 157 Status of fan 6 R 36 Status of digital input 12 R 158 Status of fan 7 R 37 Status of digital input 13 R 159 Status of fan 8 R 38 Status of digital input 14 R 160 Status of fan 9 R 39 Status of digita
21. 2 Set Max triac and Min triac to zero 3 Increase Max triac until the fan operates at a speed considered sufficient make sure that after having stopped it it starts rotating if left free Copy this value to the Min triac parameter this sets the voltage corresponding to the minimum speed Connect a voltmeter set for 250 V AC between the two L terminals the two external contacts Increase Max triac until the voltage stabilises at around 2 Vac inductive motors or 1 6 1 7 Vac capacitive motors Once the optimum value is found it should be seen that even when increasing Max triac the voltage no longer decreases Do not increase Max triac any further so as to avoid damaging the motor 9 Setthe force inverter parameter back to AUTO The operation is now complete CO Pa dS Cod 030221991 rel 2 6 01 04 09 26 Standard compressor packs 8 Various settings 8 1 Fan time bands Clock branch screens K1 K2 and K3 If the system is fitted with a clock optional on the pCO and pCO standard on the pCO the time bands function can be enabled Up to four different time bands with their respective four different Offsets to be added to the compressor setpoint can be set Based on the current time and the time band set the software will use the corresponding offset setpoint Outside of the time bands the software will use the main setpoint S2 The final setpoint will in any case always
22. 3 1 7 2 0 16 LARGE 3 0 8 2 1 0 pCO 3 0 4 2 1 pCO 2 5 2 2 SMALL 3 0 6 2 3 SMALL 2 1 7 2 4 SMALL 2 0 8 2 5 MEDIUM 3 5 9 2 6 MEDIUM 3 4 0 2 7 MEDIUM 3 3 1 2 8 MEDIUM 3 2 2 2 9 MEDIUM 2 3 3 2 10 LARGE 3 6 4 2 11 LARGE 3 5 5 2 12 LARGE 3 4 6 2 13 LARGE 3 3 7 2 14 LARGE 3 2 8 2 2 0 SMALL 3 2 6 2 2 1 SMALL 3 1 7 2 2 2 SMALL 3 0 8 2 2 3 MEDIUM 3 7 9 2 2 4 MEDIUM 3 6 0 2 2 5 MEDIUM 3 5 1 2 2 6 MEDIUM 3 4 2 2 2 7 MEDIUM 3 3 3 2 2 8 LARGE 3 8 4 2 2 9 LARGE 3 7 5 2 2 10 LARGE 3 6 6 2 2 11 LARGE 3 5 7 2 2 12 LARGE 3 4 8 2 3 0 SMALL 3 2 8 2 3 1 MEDIUM 3 9 9 2 3 2 MEDIUM 3 8 0 2 3 3 MEDIUM 3 7 1 2 3 4 MEDIUM 3 6 2 2 3 5 MEDIUM 3 5 3 2 3 6 LARGE 3 10 4 2 3 7 LARGE 3 9 5 2 3 8 LARGE 3 8 6 2 3 9 LARGE 3 Y 7 2 3 10 LARGE 3 6 8 3 0 0 pCO 2 0 3 3 0 1 pCO 1 2 4 3 0 2 pCO 1 1 5 3 0 3 SMALL 1 2 6 3 0 4 SMALL 1 1 7 3 0 5 SMALL 1 0 8 3 0 6 MEDIUM 2 4 9 3 0 7 MEDIUM 2 3 0 3 0 8 MEDIUM 2 2 1 3 0 9 MEDIUM 1 4 2 3 0 10 MEDIUM 1 3 3 3 0 11 LARGE 3 2 4 3 0 12 LARGE 3 1 5 3 0 13 LARGE 3 0 6 3 0 14 LARGE 2 2 7 3 0 15 LARGE 2 1 8 3 1 0 SMALL 2 2 6 3 1 1 SMALL 2 1 7 3 1 2 SMALL 2 0 8 3 1 3 MEDIUM 3 4 9 3 1 4 MEDIUM 3 3 10 3 1 5 MEDIUM 3 2 11 3 1 6 MEDIUM 2 4 12 Cod 4 030221991 rel 2 6 01 04 09 55 Centrale Frigo Standard Cmp 0 Board MEDIU Free inputs 3 Outputs used 13 LARGE 3 LARG
23. No Yes Switch Off unit DAN B1 Enable unit ON OFF from the screen Yes No Yes Delete Hystorical Alarms RAW B2 Deletes the alarm log Y N N SMS test sending RAW B2 Used to senda test SMS if the GSM modem is enabled Y N N Phone number RAW Bi GSM modem telephone number settings Displayed if the GSM 20 digits 0 modem is enabled settable by the user Modem password HI B3 GSMmodem password settings Displayed if the GSM modem is enabled 0 9999 0 SMS text RAW B4 Customised SMS message Displayed if the GSM modem is enabled Settable message Alarm compressor hour RW B5 ax compressor operating hour threshold setting Hours 1 999000 1000000 meter threshold Once the threshold is exceeded an alarm is activated Alarm fan hour meter RAW B6 ax fan operating hour threshold setting Hours 1 999000 1000000 threshold Once the threshold is exceeded an alarm is activated Compressors time counters RAW B7 B8 Used to reset the individual hour counter for the compressors Y N N reset 1 2 12 Fans time counters reset HAN B9 JUsedto reset the individual hour counter for the fans Y N N Electr Absor Daily reset RAN Ba Reset daily power consumption count Y N Monthly reset reset monthly power consumption count early reset reset annual power consumption count Electr Absor RAN Bb Reset total power consumption count Y N N Total reset Electr Absor RAN Bb Reset daily power consumption count Y N C Day reset Reset night time power consumption cou
24. alarm HI P6 Suction probe alarm differential setting bar C 0 99 9 0 5 Differential Suction alarm RAW P6 Suction probe alarm delay setting S 0 999 1 Delay Suction alarm low thres RAW P7 Suction probe alarm low threshold setting bar C 95T95 or 0 5 0 5 to 7 0 bar Suction alarm HI P7 Suction probe alarm differential setting bar C 0 99 9 0 5 Differential Suction alarm RAW P7 Suction probe alarm delay setting S 0 9999 1 Delay Cod 4 030221991 rel 2 6 01 04 09 40 Parameter Type Screen Description Range Default Note TRES Standard compressor packs Discharge alarm High thres Discharge probe alarm high threshold setting bar C 95T95 or 0130 20 0 Discharge alarm RAW P8 Discharge probe alarm differential setting bar C 0 99 9 1 0 Differential Discharge alarm RAW P8 Discharge probe alarm delay setting S 0 9999 1 Delay HP discharge Prev RAV P9 Time within which the start requests are ignored after a prevent HP m 0 99 5 Time prevent11 has been activated HP discharge Prev RAN P9 f two prevent cycles occur within this time an excessive prevent m 0 9999 6 Time prevent2 frequency alarm is generated HP discharge Prev RAN P9 fno prevent alarms are activated in this period the excessive m 0 99 30 Time prevent3 prevent frequency alarm is reset automatically Dis
25. between load step activation for the same compressor Manufacturer branch general parameters screen T5 The parameter is present only if load steps have been selected screen C4 This is the minimum time that must elapse between the activation of two load steps or alternatively between when the compressor starts and the activation of capacity control It prevents the compressor from starting at full capacity Cod 030221991 rel 2 6 01 04 09 22 Standard compressor packs 7 Fan management Employed Inputs e Discharge pressure probe e Digital inputs dedicated to the fan safety devices e General discharge pressure switch Control parameters used Number of fans Fan setpoint Fan differential Minimum fan setpoint limit Maximum fan setpoint Enable prevent HP Fan time settings Type of rotation Type of control Enable fan inverter Fan inverter offset Fan inverter differential Minimum inverter output Inverter speed up Outputs used e Condenser fans e Condensation fans speed controller 7 1 General settings 7 1 1 Types of fan safety devices Manufacturer branch device configuration parameters screen CK There are two types of safety devices for the fans A thermal overload for each fan step This has immediate activation and manual reset and only affects the specific fan One main fan thermal overload This has immediate activation and manual reset and is display only It is very useful if there are f
26. compressors Liquid level alarm 1 load step per compressor ON OFF from digital input fan inverters Type of analogue inputs Universal analogue input 1 Suction pressure probe Universal analogue input 2 Discharge pressure probe Universal analogue input 2 Passive analogue input 4 NTC PT1000 ON OFF General low pressure switch Passive analogue input b NTC PT1000 ON OFF General high pressure switch NTC 0 to 1 V 0 to 10 V 0 to 20 mA 4 to 20 mA Table 13 9 Type of analogue inputs Analogue output no 1 0 to 10 V Analogue output no 2 0 to 10 V EEG E Y3 Analogue output no 3 PWM only pCO Table 13 10 ID13 Digital input 13 Klixon thermal overload fan 2 ID14 Digital input 14 Klixon thermal overload fan 1 Table 13 11 Compressor 1 Load step 1 compresso Compressor 2 Load step 1 compresso Compressor 3 Load step 1 compresso N09 ormally open contact relay no 7 Compressor 4 or mally open contact relay no 8 Load step 1 compressor 4 NO9 Normally open contact relay no 9 General alarm NO10 Normally open contact relay no 10 NO11 Normally open contact relay no 11 NO12 Normally open contact relay no 12 N013 ormally open contact relay no 13 Fan 1 Table 13 12 Cod 4 030221991 rel 2 6 01 04 09 52 Standard compressor packs 14 4 Default for pCO2 LARGE board Inputs Devices 1 input per fan
27. main and most commonly used communication standards As a result connection cards are available for the following standards Type of board pCO code pCO pCO code RS485 serial connection card optically isolated PCO2004850 PCO1004850 RS232 serial connection card not optically isolated PCO200MDMO PCO100MDMO Table 9 1 The user can depending on specific needs decide whether to install the supervisor system connection card so as to send all the parameters set in the pCO In addition an external GATEWAY is available for communication with the BACNET protocol 10 2 Communication protocols The pCO line of controllers supports and integrates three communication protocols into the unit s operating system these CAREL MODBUS and GSM MODEM To enable the correct operation of these communication protocols as well as installing the proper serial card a number of parameters need to be set such as the identification number of the pCO and enabling the function screens VO and V1 Then choose the desired communication protocol Each pCO must have the address set so that e There are NO other devices with the same address on the same serial line e The addresses of the pCO on the same serial line must be set in progressive order starting from 1 For further information refer to the corresponding manual or contact CAREL 10 3 Other protocols 10 3 1 GSM protocol Selecting the GSM protocol allows SMS messages to be sent
28. menn eR dE e E ret dep De emitte De nan aede nid ande 14 5 LEET EE 15 5 1 Proportional band 15 52 Dead zone 16 ENDS CSS RHET ET 17 6 EE ER EE 17 62 Compressors with different capacities ssis niesna E a SE E a a AE a A EEEa aaa atiati Eni EEEE 20 6 3 EnO E EE 21 7 Fanmanagement o6 EE Rn PARE DET ER BRA REC B PA Ravi e UU N E RAI 7 1 General Set ntss s each ers hadas bebe 7 2 Fan time settings 73 PWM PPM management 8 VETE TUI SEED E H 8 1 IBID RC PIT Re 82 Fan ime DAMES Ram ca 83 odulating condensation setpoint 84 fai rz ro s ets E Ej s D RR CE 85 de WUER EE E EE 8 6 Change setpoint from digital input 8 7 Mani al device Operationi coca restreint es gite de eR REESE ERE Rc ec Rec e E A DURER 8 8 Auxiliary PUPP manage miet ecc crecer EEEE ee 8 9 Type of refrigerant 8 10 Auxiliary probe EE s caet edictis ae hs ec a E t dl D e 8 11 Energy Consurmption Control BIAIS Ro 8 12 Calculate estimated efficiency function 8 13 Preventhigh discharge pressule 3 9 cem tete Datei ate bb pc bep dese ge bc teet bct cede Neb ERE 9 Alarm managements EE ise wnce a ele ee ee ee EN TE lu EE ER Alarms with marnal eset 2h aba amaba bam ate ma Aere medi amem ee 9 3 Semiautomatic alarms 9 4 PA IMBRE 95 IEEE TT
29. suction pressure alarm differential R 66 Daily energy consumption x 100 RW 16 Low suction pressure alarm threshold R 67 Daily energy consumption x 1000 RW 17 Low suction pressure alarm differential R 68 Night time energy consumption x 100 RW 18 High discharge pressure alarm threshold R 69 Night time energy consumption x 1000 RW 19 High discharge pressure alarm differential R 70 Start hours for sampling daily energy consumption RW 20 Low discharge pressure alarm threshold R 71 Start minutes for sampling daily energy consumption RW 21 Low discharge pressure alarm differential R 72 Start month for sampling daily energy consumption R 22 Compressor activation point R 73 Start year for sampling daily energy consumption R 23 Compressor deactivation point R 74 Start minutes for energy consumption zone R 24 Fan deactivation point R 75 Start hours for energy consumption zone RW 27 Fan inverter setpoint R 76 End minutes for energy consumption zone RW 28 Fan inverter differential R 77 End hours for energy consumption zone RW 30 Calibration of probe 1 R 78 Room temperature sensor RW 31 Calibration of probe 2 R 79 Suction temperature sensor RW 32 Compressor inverter setpoint R 80 General temperature sensor RW 33 Compressor inverter differential H 81 External Temperature probe RW 34 Theoretical compressor suction temperature R 82 Refrigerant sensor RW 35 Theoretical outlet temperature RW 83 Refrigerant sensor threshold RW 36 I
30. the maximum of its capacity The control is not associated with any compressors and can work without compressors being configured Inverter A Key 10 Volt 1 RB Compressor differential RBI Inverter differential SP Suction setpoint A Suction setpoint inverter offset C A inverter differential SR B Suction setpoint compressor differential Min In Minimum value of the inverter control output InPress InPress Suction pressure Fig 5 2 6 1 8 Capacity control parameters Controlling the capacity of a compressor means distributing the load or capacity into a series of steps This is not valid for single cylinder compressors On the other hand for multi cylinder compressors applying the load steps distributes the load within the same compressor according to requirements This is used to reduce the number of compressor starts optimising the operation and life of the devices Number of load steps Manufacturer branch configuration screen C4 One two or three load steps can be selected with a maximum of 4 relays per compressor This parameter is displayed only if there is at least one free output per configured compressor and if the Compressor Inverter functions have not been enabled at the same time Capacity controls logic Manufacturer branch general parameters screen G8 If the load steps are sued this parameter selects the operating logic of the outputs dedicated to the load steps Normally energised NC Copeland log
31. the values of the parameters or to copy the contents of the key to the pCO thus programming it NB There is no programming key for the pCO controller For further information refer to the instruction sheet included in the packaging of the hardware key 3 3 2 Updating the software by computer The software resident on all pCO controllers can be updated using a PC For this purpose CAREL provides the WinLoad32 program and a special kit code PC485KITO0 RS232 RS485 converter For the installation of the WinLoad32 program see the web site http ksa carel com The pCO controller can be connected directly to the PC using the serial port used for the pLAN or via the optional RS485 serial port used for the supervisor connection The pCO controller can be connected to a modem using the optional RS232 serial port and thus to Winload32 via a remote connection For further information on how to install and use Winload32 see the on line help or contact CAREL Cod 030221991 rel 2 6 01 04 09 11 Standard compressor packs 3 4 Basic configuration According to the board used and the number of inputs per compressor screen C3 the number of compressors set can vary from 1 to 6 with between 1 and 3 load steps for a total of 4 outputs per compressor and between 1 and 16 fan steps In addition the compressors and the fans can be configured for PWM speed controllers or inverters The program checks the type of board that it is working w
32. thermal overload on fan 11 H 67 Alarm oil diff pressure compressor 3 R 147 Alarm thermal overload on fan 12 H 68 Alarm oil diff pressure compressor 4 R 148 Alarm thermal overload on fan 13 R 69 Alarm oil diff pressure compressor 5 R 149 Alarm thermal overload on fan 14 R 70 Alarm oil diff pressure compressor 6 R 150 Alarm thermal overload on fan 15 R 7 Alarm service hour threshold exceeded comp 1 R 151 Alarm thermal overload on fan 16 R 72 Alarm service hour threshold exceeded comp 2 R 152 Operation blocked by discharge high pressure pre alarm R 73 Alarm service hour threshold exceeded comp 3 R 153 Compressors turned off by pre alarm R 74 Alarm service hour threshold exceeded comp 4 R 154 High frequency of pre alarm H 75 Alarm service hour threshold exceeded comp 5 R 169 High frequency of low pressure switch intervention pre R 76 Alarm service hour threshold exceeded comp 6 alarm R 77 Alarm thermal overload on fan 1 H 170 B3 probe broken or disconnected R 78 Alarm thermal overload on fan 2 H 171 B6 probe broken or disconnected H 79 Alarm thermal overload on fan 3 H 172 B7 probe broken or disconnected R 80 Alarm thermal overload on fan 4 R 173 Alarm common fan thermal overload R 81 Liquid level alarm R 174 Alarm common oil diff pressure compressors R 82 Alarm general low pressure from switch R 180 Low Superheat alarm R 83 Alarm general high pressure from switch R 181 Alarm o
33. 1 04 09 49 Standard compressor packs 14 Default configurations The software manages a different installation depending on the board installed The following shows the configurations for each type of board In any case the position of the digital inputs outputs for the various functions can be modified In common the configurations have e Alarm relay e Suction probe e Discharge probe e General high pressure switch e General low pressure switch 14 1 Default for pCOXS board Inputs Devices 1 input per fan 2 fans 1 input per compressor 2 compressors 0 load steps Fan inverters Signal Type of analogue inputs Description B1 universal analogue input 1 suction pressure probe B2 universal analogue input 2 Discharge pressure probe B3 NTC analogue input 3 B4 analogue input 4 NTC NTC 0 to 1 V 0 to 20 mA 4 to 20 mA 0 to 5 V Table 13 1 Type of analogue output Analogue output no 1 0 to 10 V Analogue output no 2 0 to 10 V Y3 Analogue output no 3 PWM Table 13 2 ID6 Digital input no 6 General high pressure switch Table 13 3 Type of digital outputs Normally open contact relay no 1 Normally open contact relay no 2 Normally open contact relay no 3 Fan 1 Normally open contact relay no 4 N05 Normally open contact relay no 5 General alarm Table 13 4 Cod 4 030221991 rel 2 6 01 04 09 50 Standard compressor packs 14 2 Default for SMALL Pco1
34. 1991 rel 2 6 01 04 09 37 Parameter Type Screen Description Range Default Note SCH Standard compressor packs Electrical absorption instant Displays the instant power consumption value 0 9999 value Electr absor R Ad Displays power consumption kW 0 999999 Daily current current daily kW MW Monthly current current monthly MW early current and current annual MW Electr Absor Daily old R Ae Displays power consumption kW 0 999999 Monthly old previous daily KW MW early old monthly MW annual KW Electrical absorption total R Af Displays the total power consumption MW MW 0 999999 999 Electr Absor R Ag ndicates the time band in which the current daily power kW 0 9999 00 00 C day 00 consumption is calculated and displays the current daily power C day current consumption as a percentage Electr Absor R Ah Indicates the time band in which the daily and night time power kW 0 9999 00 00 C day 00 00 consumption is calculated and displays the daily power consumption C day as a percentage and the night time power consumption as a C night percentage GSM MODEM R A GSM modem GSM status and signal reception expressed as a Status percentage Field Insert maintenance HI BO ntermaintenance password 0 9999 0 password Keyborad On Off enable HI B1 Enable ON OFF from the keypad Yes
35. 3 LARGE 3 6 16 0 0 16 LARGE 3 6 16 2 14 LARGE 3 5 17 1 0 0 pCO 3 3 1 2 15 LARGE 3 4 18 0 pCO 3 2 2 3 0 pCO 3 3 4 0 2 pCO 3 1 3 3 pCO 3 2 5 0 3 pCO 3 0 4 3 2 SMALL 3 3 6 0 4 pCO 2 0 5 3 3 SMALL 3 2 7 1 0 5 SMALL 3 0 6 3 4 SMALL 3 1 8 1 1 0 pCO 3 3 2 3 5 MEDIUM 3 8 9 pCO 3 2 3 3 6 MEDIUM 3 7 10 2 pCO 3 1 4 3 7 MEDIUM 3 6 11 3 pCO 3 0 5 3 8 MEDIUM 3 5 12 4 SMALL 3 1 6 3 9 MEDIUM 3 4 13 5 SMALL 3 0 7 3 10 LARGE 3 9 14 6 SMALL 2 0 8 3 11 LARGE 3 8 15 7 MEDIUM 3 6 9 3 12 LARGE 3 7 16 1 8 MEDIUM 3 5 10 3 13 LARGE 3 6 17 1 9 MEDIUM 3 4 11 3 14 LARGE 3 5 18 1 10 MEDIUM 3 3 12 2 0 0 pCO 3 0 2 1 11 MEDIUM 3 2 13 2 0 1 pCO 2 1 3 1 12 LARGE 3 7 14 2 0 2 pCO 2 0 4 1 13 LARGE 3 6 15 2 0 3 pCO 1 1 5 1 14 LARGE 3 5 16 2 0 4 SMALL 2 0 6 2 0 5 SMALL 1 1 7 Cod 4 030221991 rel 2 6 01 04 09 54 Cmp P Fan Board d DC d inputs used 2 0 6 SMALL 1 0 8 2 0 7 MEDIUM 3 3 9 2 0 8 MEDIUM 3 2 0 2 0 9 MEDIUM 2 3 1 2 0 10 MEDIUM 2 2 2 2 0 11 MEDIUM 1 3 3 2 0 12 LARGE 3 4 4 2 0 13 LARGE 3 3 5 2 0 14 LARGE 3 2 6 2 0 15 LARGE
36. 4 Alarm relay logic Can be seen if the alarm relay is enabled Normally closed Normally open open Comp rotation HAN G5 Type of compressor rotation LIFO FIFO FIFO timed Comp control RAW G5 lypeof control to be used with compressor management Proportional Dead zone band Dead zone Type of control Compressor R W G6 Type of compressor control P Proportional or P 1 Proportional is P P I P integral Can be seen only if Proportional Band is enabled Integr time only P R W G6 Integral time of P control S 0 999 600 Comp start mode RAW G7 Compressors start mode CppCppCpp CCCpppppp or pCppC FULL CppCppCpp CopCppCpp CCCpppppp pCppC FULL Comp deactivation mode RAW G7 Compressors deactivation mode ppCppCppC or ppppppCCC ppCppCppC ppCppCppC ppppppCCC Load steps logic RAW G8 Sets whether the load step solenoids are normally energised Normally closed Normally closed de energised open with compressor on open closed Minimum compressor RAW G9 Minimum compressor inverter opening setting 0 100 0 inverter opening Minimum fan inverter RAW G9 Minimum fan inverter opening setting 96 0 100 0 opening PWM speed controller RAW Ga Value directly linked to the maximum Triac voltage threshold 96 0 100 75 Max Triac Only on pCO pCO PWM speed controller RAW Ga Value directly linked to the minimum Triac voltage threshold 96 0 100 25 Min Triac PWM speed controller HA Ga Pulse amplitude given to Triac
37. 4 09 14 Standard compressor packs 5 General Settings 5 1 Proportional band Proportional band control calculates based on the parameters SP DF and the number of devices set the various points of activation and deactivation of the devices so as the various starts and stops are positioned proportionally within the differential band Figure 1 shows the activation of the steps for a system with 4 loads By setting the parameters listed above every single step has a differential of DF No steps Key SP Set point compressors S2 fans S1 DF Differential compressors and fans S8 RP X Pressure read DF RP EN SP Fig 4 1 5 1 1 Proportional and Integral control PI To eliminate the steady state error between the controlled value and the set point typical of proportional control a Proportional and Integral strategy P I can be used This strategy helps overcome situations of stalemate in which the working point remains steadily at a value other than the set point PI control adds the Integral action to Proportional control This action when a control error persists has an increasing effect over time on the overall control action The parameter that defines the Integral action is the Integral time The default value is 600 s 10 min The Integral time corresponds to the time taken by the Integral action with a constant error to balance the Proportional action The lower the Integral time the faster the response of the
38. 4 fans 1 thermal overload 1 oil differential H L pressure switch per compressor 5 compressors Liquid level alarm 1 load step per compressor fan inverters Type of analogue inputs Universal analogue input 1 Suction pressure probe B3___ Universal analogue input3 oc Passive analogue input 5 NTC PT1000 ON OFF B 9 Passive analogue input 9 NTC PT1000 ON OFF Klixon thermal overload fan 1 B10 Passive analogue input 10 NTC PT1000 ON OFF Klixon thermal overload fan 2 Table 13 3 Type of analogue outputs Y2 Analogue output no 2 0 to 10 V Compressernverters Table 13 14 D1 Digital input no 1 Thermal overload comp 1 D2 Digital input no 2 Thermal overload comp 2 D3 Digital input no 3 Thermal overload comp 3 D4 Digital input no 4 Thermal overload comp 4 D5 Digital input no 5 Thermal overload comp 5 D6 Digital input no 6 Oil differential 1 D7 Digital input no 7 Oil differential 2 D8 Digital input no 8 Oil differential 3 D9 Digital input no 9 Oil differential 4 ID10 Digital input no 10 Oil differential 5 ID11 Digital input no 11 High low pressure switch 1 ID12 Digital input no 12 High low pressure switch 2 ID13 Digital input 13 High low pressure switch 3 ID14 Digital input 14 High low pressure switch 4 ID15 Digital input 15 High low pressure switch 5 ID16 Digital input 16 Liquid level alarm ID17 Digital inpu
39. 9 lg P8 Cb Da Ea Ih Pg Re Db Eb li Pa Cd Dc Ec lj Pb Ce Dd Ik Pc Cf De Il Pu Cg Df Im Pd Ch Dg Pe Cj Dh Pf Dj Pg PARAM G0 Ph G1 Pi G2 Pj G3 Pr G4 Ps G5 Pt G6 Pk G7 G8 G9 Ga Gf Gg Gb Gc Gh Gd Ge TIMES T1 T2 T3 T4 T5 T6 T7 T8 INITIAL gt VO Vi V2 V3 V4 Table 10 2 Cod 030221991 rel 2 6 01 04 09 36 Standard compressor packs 12 List of parameters This table contains the list of all the parameters that appear on the screens with the corresponding description Parameter string as it appears in the screen Type R read only R W read write Pos position of screen in the application screen index Description brief description of the parameter UOM unit of measurement of value in question Range range of values that parameter can be given Default factory set value of the parameter Note column available for the user s notes IMPORTANT Not all the screens listed below will be displayed by scrolling the cursor enabling a certain type of configuration may mean that the associated screens previously not present will now be displayed The display therefore depends on the initial configuration Table of parameters Parameter Type Screen Description UOM Range Default Note position MAIN SCREENS 15 button terminal MENU button 6 button terminal ESC button Suction press Pressure measured by the intake sensor on the compressors suction bar Scree
40. CAREL standard compressor packs Application software for pCO pCO pCO pco wn S I v Iw 22 FF FF L 7 Hn g ENO User manual Manual version 2 6 del 01 04 09 Programm code FLSTDMFCOA LEGGI E CONSERVA gt hele ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS Technology amp Evolution LEGGI E CONSERVA gt QUESTE ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS We wish to save you time and money We can assure you that the thorough reading of this manual will guarantee correct installation and safe use of the product described IMPORTANT WARNINGS A BEFORE INSTALLING OR HANDLING THE DEVICE PLEASE CAREFULLY READ AND FOLLOW THE INSTRUCTIONS DESCRIBED IN THIS MANUAL This appliance has been manufactured to operate risk free for its specific purpose as long as it is installed operated and maintained according to the instructions contained in this manual the environmental conditions and the voltage of the power supply correspond to those specified All other uses and modifications made to the device which are not authorised by the manufacturer are considered incorrect Liability for injury or damage caused by the incorrect use of the device lies exclusively with the user Please note that this unit contains powered electrical devices and therefore all service and maintenance operations must be performed by specialist and qualified per
41. CO For example a command can be sent to reset an alarm or change the value of the setpoint The messages sent must use the following format pCO2 PWD Type1 Index1 Value1 TypeN IndexN ValueN with N lt 11 where pCO2 Message header PWD Access password this must be 4 ASCII characters and coincide with the remote access password If the password is 0001 PWD will be 0001 Typei Type of the i th variable to be set this is 1 character and may be either A I or D respectively Analogue Integer or Digital variable Index Index of the i th variable to be set this must contain 3 consecutive characters made up of the numbers 0 to 9 If for example the index of the variable is 132 Index will be 132 Values Value to be set for the i th variable this must always be made up of 6 characters the first being the sign and the others the numbers from 0 to 9 If for example the value of the variable is 12 Value will be 000012 or alternatively 4 00012 If on the other hand the value of the variable is 243 Value will be 00243 For analogue variables the value sent is the effective value of the variable multiplied by 10 For example the value 00243 corresponds to 24 3 For digital variables the possible values are 000000 or alternatively 000001 N the number of variables to be set in a single SMS message The maximum number so as to not
42. E 3 LARGE 3 LARGE 3 LARGE 3 MEDIU MEDIU MEDIU MEDIU MEDIU LARGE 3 LARGE LARGE LARGE LARGE MEDIU MEDIU Od Ol MD NY CO CO BY OT MDM NY mM hoy Bo LARG LARG el LARG LARG LARG pco pco SMALL 1 SMALL SMALL MEDIU MEDIU MEDIU ojl oanl A vN gt oloaan Alon gt l oloo WN OD Oo BY YN MEDIU co MEDIU c LARGE LARGE N LARGE 99 LARGE NININ amp oj ojojojojo o o o o o o co co coc c o co co co co co Co nr5 2 2 2 2 2 2 9 ROR 5 9 9 9 9 A LARGE SMALL kl ke MEDIU MEDIU MEDIU MEDIU MEDIU LARGE LARGE LARGE RO OO BP OO RPO RO CO OO OO MH FPO CO OO CO BIO NO CO OO Po Mm NR Co wo CO CoO NM Oo 01 amp CO PS LARGE c LARGE pum d MEDIU MEDIU LARGE LARGE LARGE LARGE LARGE A o1 o co Cco c LARGE c LARGE LARGE pcos 1 SMALL SMALL SMALL MEDIU MEDIU 3 R3 MEDIU MEDIU co 4 o0 o1 co ro 5 o ro ol o o1 o co nr MEDIU LARG LARG LARG LARG alatatafafafanfanfanfanf
43. T8 To assist the start of the inverter a time can be set expressed in seconds during which the inverter is operated at 10096 Cod 030221991 rel 2 6 01 04 09 25 Standard compressor packs 7 3 PWM PPM management On the pCO1 pCOxs boards the analogue output Y3 can be used as a PWM or PPM output Device configurations screen C5 This output is used to drive phase control modules that directly control the fan speed The output depending on how it is configured can generate a pulse width modulation PWM or pulse position modulation PPM signal Two graphs that illustrate the two modes are shown in figure 6 5 In the first graph it can be seen that the request is 8096 of the maximum value while in the second it is 5096 QA PWM vi 5 Volt Fig 6 5 Note To configure output Y3 as PWM simply set the pulse width to zero screen Ga while to set it for PPM mode the recommended pulse width value is 2 5 ms The PWM signal controls for example the CAREL FCS series CONVONOFF CONVO 10A0 modules The PPM signal controls for example the CAREL MCHRT series modules IMPORTANT the power supply to the pCO1 pCOxs G and GO and the MCHRTF board must be in phase If for example the power supply to the pCO module system is three phase make sure that the primary of the power transformer on the pCO1 pCOxs board is connected to the same phase that is connected to terminals N and L on the speed control board conse
44. a total of four outputs for each compressor and up to sixteen fan steps Condensation and evaporation set points that can be altered according to the external conditions only on PGDOQ Complete alarm management and logging Programming of time bands with variation of the set point Connection to a supervisor telemaintenance serial line by analogue modem or GSM e Send SMS to cellular phones Devices controlled e compressors e condensation fans e auxiliary pump Programming e Display and control of the values measured by external LCD PGDO or Built in terminal Parameters organised into three levels of security Multi language management English Italian French German Spanish Russian only on PGDO Possibility to configure all the unit parameters by hardware key Possibility to configure the main unit parameters via serial line Warnings 7he information contained in this manual is valid starting from version 1 8 of the application software From version 1 5 on the application software is not compatible with BIOS versions prior to 3 57 and BOOT versions prior to 3 01 1 3 Compatible hardware The program is compatible with the following devices e pCO codes PCO100 pCO SMALL pCO MEDIUM codes PCO100 pCO SMALL pCO MEDIUM pCO LARGE codes PCO200 pCO SMALL pCO MEDIUM pCO LARGE PCOT 4x20 LCD display for panel installation and wall mounting PCOI 4x20 LCD display for panel installation PGDO semi graphi
45. able on screen G5 with FIFO rotation G5 For a description of dead zone or proportional band operation see the corresponding paragraph 6 General settings 6 1 1 Types of compressor safety devices Manufacturer branch general parameters screen C3 Each compressor can have a maximum of four types of safety devices these are Type Description Delay Reset A Safety only Settable Po Settable G2 B Thermal overload Oil differential heima overload Settable Po Settable G2 Oil differential Delayed P4 manual C Thermal overload High low pressure Thermal overload Settable Po Settable G2 switch High low pressure switch Settable G2 D Thermal overload Oil differential f high low pressure switch includes all three previous types of alarm 6 1 2 Number of compressor In on costructor general parameter mask C4 The standard compressor could manage until max 12 compressor In particular if you select a number of compressor greather than six is possibile comfigure only one safety for compressor and only one output If the numer of compressor is grather is not possibile use compressor of different power Table 5 1 6 1 3 Compressor management without inverter This can be configured with or without capacity control Parameters used for ON OFF control e number of load steps e number of compressors e load step times e compressor times The compressors are managed by the unit based on a setpoint a
46. alarm is generated In addition observing the time set on screen T1 all the compressor load steps are deactivated gradually If the condensing pressure falls below the Prevent threshold any other compressor start requests are ignored for a set time called prevent time 1 screen P9 If between the start of two prevent cycles a time less than prevent time 2 screen P9 elapsed the Excessive prevent frequency alarm is generated The Excessive prevent frequency alarm display only is resets automatically if within prevent time 3 screen P9 the Prevent function is not activated again This alarm can be reset manually by the user at any time outPrest STPpr Key fe DutPress Supply press T Time A ae NCmp umber of suction steps required ALPrv High pressure prevention alarm STPpr Prevent HP activation threshold Ti Time between compressor stops with prevent HP active Dprev1 Step activation delay after end prevent HP prevent time 1 Dprev2 inimum time for activation of high prevent frequency alarm prevent time 2 Cod 030221991 rel 2 6 01 04 09 30 Standard compressor packs 9 Alarm management The unit manages all the procedures relating to the individual alarms action delays resets and corresponding signals When an alarm is activated the devices are affected accordingly where featured and the following actions are performed simultaneously LED on buzzer on external terminal
47. ance c manufacturer k clock f info q history m on off Unit u unit change For the correct operation of the PGDO with 6 buttons the pLAN address of the pCO needs to be set to 1 and the pLAN address of the PGDO to 32 See Setting the pLAN address in the pCO and PGDO manuals Cod 030221991 rel 2 6 01 04 09 10 Standard compressor packs 3 Starting the unit 3 1 Selecting the language for displaying the screens The application software allows the language of the user interface to be changed at power on The first screen after the initial autotest phase displays the current language which can be changed by pressing ENTER If no button is pressed after a few seconds the main screen MO is displayed without changing the language The language can also be changed any time after 3 2 First start up When you have checked the connections between the cards and terminals power up the pCO card s On power up the software automatically installs the default values chosen by CAREL for the configuration parameters When starting for the first time the following operation is not required 3 2 1 Initialising the parameters in the permanent memory This section tells you how to reset default values to return to the initial conditions CAUTION This procedure irreversibly deletes any programming performed by the user the main log and the counters for the devices These are the steps 1 press the MENU PROG buttons the password s
48. anf anf anf an 2 2 2 m m mIBmA EADIEBDLIEBDIRA LIERALIERmLIELIEmLBEmALEmLEmEEeLELIELIEL EL EL RR RR BR BR BR RR RR BR CO CO OO OO oO OW ow ow co co coc co co Co co EA CO CO DIO OOOO JOsOJO OO OO OC OO OO W WW GC RI RY RO RO ROT RO 95 LARG ININININ Bl OO mJ Popo oo BI MD No OO Nh Co co c o o1 amp c6 m 2 o 9 9 9 9 os ooo i a al Se e ro oo 31 O1 er 2 o Ei Eilen Alen R alrm a olP P F 8 oo loo m e ro oo 1 o Ee l b i ale Ef len E On x Cmp Fan Board MEDIUM 2 Free inputs Outputs used 0 MEDIUM 2 MEDIUM 2 MEDIUM 2 LARGE 3 LARGE 3 LARGE 3 LARGE 3 LARGE 2 LARGE 3 LARGE 3 LARGE 3 LARGE 3 SMALL 1 SMALL 1 SMALL 1 MEDIUM O o o o o o1 oO1 O1 O1 O1 O1 O1 O1 O1 O1 O1 O1 O1 ce ojoj o o ro r5 r5 nr5 A Cco ro co co r5o o oo Oo O1 32 Co n5 OD MEDIUM DIA IO RH FRO HPO DI NS BLO mH PR wo oo Elon ce ej ej 9lisj oelejc o o s co rn Cod 4 030221991 rel 2 6 01 04 09 56 Centrale Frigo Standard Cmp 0 Board MEDIU Free inputs 5 Outputs used 11 MEDIU MEDIU LARGE 4 3 2 LARGE LARGE LARGE LARGE RO ROI RO
49. be influenced by the offset from digital input and or the presence of the electronic valve For example assuming time bands with the following values the results below can be obtained Hours Mi Offset Set point Result nutes 06 00 02 1 0 bar from 06 00 to 07 00 the setpoint will be 0 8 bar 07 00 0 1 1 0 bar from 07 00 to 10 00 the setpoint will be 0 9 bar 10 00 0 0 1 0 bar trom 10 00 00 to 17 00 00 the setpoint will be 1 0 17 00 0 1 1 0 bar from 17 00 00 to 06 00 00 the setpoint will be 1 1 Table 8 1 In the case of a modulating setpoint the offsets regarding the different bands will alter the setpoint limits Key SP Set point m t time 17 00 t i Fig 7 1 8 2 Fan time bands Clock branch screens K6 e K7 If the system has a clock option on pCO and pCO 5 standard on pCO and pCO you can enable the function time bands on fan Sometimes is necessary reduce the power of the fan for limit the noise The bands of fan allow to increment the set of fan reducing the number of start up Looking the band and the time the software will calcolate the offset to sum at the fan set Out the band selected the software will use the main set point Sd The final set point will depend from the digital input offset and or from the electronic valve Esempio START TIME END TIME OFFSET SET POINT RESULT 20 00 07 00 1 0 bar 16 0bar From 20 00 to 07 00 the set is 17 0 ba
50. c display Built in LCD display fitted on the pCO and pCO boards Cod 030221991 rel 2 6 01 04 09 7 Standard compressor packs 2 The user terminal The system features a terminal with LCD 4 rows by 20 columns Three types are available e Built in on the board with just 6 buttons e external LCD connected using a telephone cable with 15 buttons e external PGDO connected using a telephone cable with semi graphic functions All these terminals can be used to perform all the operations allowed by the program The user terminal displays the operating conditions of the unit at all times and can be used to modify the parameters It can also be disconnected from the main board and does not need to be connected for operation 2 1 LEDs under the buttons The LEDs are found on all terminals except on the pCOXS built in They are beneath the buttons and their meanings are the following Button Display LED colour Description ON OFF unit on ON ENTER instrument powered correctly ALARM alarms active flashing if the causes of an alarm are no longer present ENTER unit on ON PROG the page displayed does not belong to the Menu branch ESC the page shown belongs to the Menu branch ALARM Built in red alarms active flashing if the causes of an alarm are no longer present Table 2 1 2 2 Display The display used has 4 rows x 20 columns The information relating to operation is displayed on pages called screens The
51. charge alarm Low thres RWW Pa Discharge probe alarm low threshold setting bar C 95T95 or 0130 2 0 Discharge alarm RAW Pa Discharge probe alarm differential setting bar C 0 99 9 1 0 Differential Discharge alarm RAW Pa Discharge probe alarm delay setting S 0 999 1 Delay Liquid level al Delay R W Pb Doud level alarm delay S 0 999 90 Alarm gas detec Threshold DAN Pc Refrigerant leak detector alarm threshold ppM 99 9 99 9 50 0 Alarm gas detec Different R W Pc Refrigerant leak detector alarm differential ppM 9 9 9 9 2 0 Alarm gas detec Delay RAW Pc Refrigerant leak detector alarm delay m 0 99 3 Sheat low alarm RAN Pu Low superheat alarm low threshold setting C 95195 5 0 Thresh Sheat low alarm RAN Pu Low superheat alarm differential setting C 0 99 9 2 0 Differential Sheat low alarm R W Pu Low superheat alarm delay setting S 0 9999 300 Delay Blackout startup delay RAV Pd Enable delay at start up after blackout Y N enabled Blackout startup delay time RAW Pd Used to diversify the start times with multiple units when power S 0 9999 returns after a blackout Swich OFF unit OFF by RAV Pe Enable ON OFF from supervisor Y N N supervisor Probe disconnected RAW Pe nable unit OFF due to probe disconnected Y N N Elect absor start sampling RW Pf Start sampling daily monthly power consumption hours minutes 0 23 23 Daily 0 59 Monthly 0 31 Elect absor start sampling R W Pg
52. control For further information refer to classical control theory Note Make sure the Integral time is not set too low otherwise the control may become unstable The following figure highlights the difference between Proportional control and Proportional plus Integral control with inverter Proportional control Proportional 4 Integral control 10 Volt 10 Volt Min In Fig 5 2 Key RP Pressure read SP Setpoint T Time Min In Minimum controller output value Cod 030221991 rel 2 6 01 04 09 15 Standard compressor packs 5 2 Dead zone This control determines a zone around the setpoint in which no device is activated or deactivated The purpose of this function is to minimise and stabilise pressure changes in the system The devices are activated when the measured value exceeds the limit to the right measured value greater than SP DZN see figure 4 3 The number of devices to be activated varies according to the time elapsed outside of the dead zone The first device will start immediately while the others will wait the set time between starts Similarly the devices are stopped when the measured value falls below the limit to the left of the dead zone measured value less than the setpoint and remains there for a period equal to the time between device stop requests In this case too the first device stops immediately while the others wait the delay time between stops also see the paragraph on Times The program
53. d as digital b9 b10 0 open C closed 15 button terminal CLOCK button 6 button terminal PROG button and CLOCK in the menu Set hour minutes 0 23 0 59 Set day month year 1 31 1 12 0 99 Daily time zones with Enable time band with set point variation Y N setpoint variation enabled Set time band 1 2 4 0 23 hours minutes 0 59 Setpoint during time band 1 2 4 min max comp set Display 15 button terminal SETPOINT button 6 button terminal PROG button and SETPOINT in the menu Compressor R SO Type of compressor control dead zone proportional band DEAD ZONE Compressor R S0 Current working setpoint in bar or degrees centigrade bar C Set Differential Diff Fans R S1 Type of fan control dead zone proportional band PROPORTIONAL BAND Fans R S1 Current working setpoint in bar or degrees centigrade bar C Set Differential Diff Compressors RAW S2 Compressor setpoint bar C min max comp 1 0 DEAD ZONE Setpoint settings set Cod 4 030221991 rel 2 6 01 04 09 39 Standard compressor packs Parameter Type Screen Description Range Default Note TUBE Fans Fan setpoint min max fan PROPORTIONAL BAND set Change Setpoint In
54. d control Dead zone control The inverter is set on the first compressor which will always be the first on and the last off This control requires an offset to be set for the control of the inverter screen S6 the setpoint SP and the inverter ramp time Three zones are defined DOnZ on zone NZ dead zone and DOffZ off zone Wherein the program behaves differently see figure 5 1 In the activation zone DOnZ the compressors are started as follows compressor 1 which is managed by the inverter is activated as soon as there is demand the compressor 1 inverter output is increased if the inverter output reaches 10 volts a compressor is started respecting the rotation and the times Once the compressor starts the inverter output immediately returns to the minimum value the compressor 1 inverter output is increased and the cycle restarts while the request remains all the compressors are started one after the other In the dead zone NZ the inverter output undergoes no variation and no compressors are started or stopped In the deactivation zone DoffZ the compressors are stopped as follows the inverter output is gradually brought to the minimum value one compressor is stopped respecting the rotation and the times Once the compressor stops the inverter output immediately returns to the maximum value the compressor 1 inverter output is decreased and the cycle restarts If the deactivation request remains all
55. d level alarm delay R 106 Type of device connected to output 10 RW 49 Minimum compressor speed R 107 Type 0 device connected to output 11 RW 50 Minimum fan speed R 108 Type of device connected to output 12 RW 51 Number of compressors forced on with probe B1 damaged R 109 Type of device connected to output 13 RW 52 Number of fans forced on with probe B2 damaged n 110 Type of device connected to output 14 RW 53 Compressor on hours alarm threshold x1000 n 111 Type of device connected to output 15 R 54 Operating hours of compressor 1 Digits gt 1000 R 112 ype or device connected to output 16 R 55 Operating hours of compressor 1 Digits lt 1000 R 113 Type Or device connected to output 17 R 56 Operating hours of compressor 2 Digits gt 1000 R 114 ype of device connected to ou put 18 R 57 Operating hours of compressor 2 Digits lt 1000 R 115 Compressor thermal overload input alarm delay R 58 Operating hours of compressor 3 Digits gt 1000 RW 116 ype 0 refrigerant R 59 Operating hours of compressor 3 Digits lt 1000 R 118 Number active fun R 60 Operating hours of compressor 4 Digits gt 1000 RW 119 Diffpressure of change neutral zone R 61 Operating hours of compressor 4 Digits lt 1000 RW 120 Time min request ON compressor in neutral zone R 62 Operating hours of compressor 5 Digits gt 1000 RW 121 Time min request OFF compressor in neutral zone Cod 030221991 rel 2 6 0
56. e UP button then select whether to switch the unit on or off 5 From screen B1 the unit can be turned off or on 3 5 Meaning of the inputs outputs As the inputs and outputs of the software are completely configurable the physical connection of the inputs and outputs changes according to which devices are configured also see the tables on the different configurations that can be set You can see the layout of the inputs and outputs in the inputs outputs branch 3 5 1 Table of analogue inputs The tables below describe the type of the probes that can be connected to the inputs and their characteristics The suction and discharge probes can also be configured for the inputs B7 B8 on the pCO2 Medium and Large boards screens Ca Cb Analogue inputs CAREL NTC temperature probes 50T105 C R T 10 kU at 25 C B1 Suction pressure temperature probe Pressure probe with voltage signal 0 to 1 V Pressure probe with voltage signal 0 to 10 V Pressure probes with current signal 0 to 20 mA B2 Discharge pressure temperature probe Pressure probes with current signal 4 to 20 mA Pressure probe with voltage signal 0 to 5 Volt only on pCO pCO pCO TC temperature probes 50T1 1 Input configured by software ith current signal 0 20 B4 Input configured by software TC temperature probes 50T1 ith current signal 0 20 mA Input configured by software Used as a digital output
57. er if it is activated at least 5 times within a set time default 10 minutes it becomes an alarm that must be reset manually 9 4 Alarm relay The user may decide whether to configure the alarm relay simply by enabling it C6 and choosing which relay to assign to the alarm Eb If enabled a delay time can be set screen P5 between the activation of an alarm and the change in the status of the signal relay If the time is set to 0 the activation of the alarm relay is immediate 9 5 Table of alarms Code Alarm description Generated by Action performed Ug Delay Note AL001 Common fan thermal overload manual no display only AL002 Common oil differential DIN display only i DN Comp1oF ALO12 Klixon thermal overload generic compressor 2 i i ALON Comp 1 OFF ALOT3 AL014 AL015 Klixon thermal overload generic compressor 5 Comp 5 OFF Cod 030221991 rel 2 6 01 04 09 31 Standard compressor packs Code Alarm description Generated by Action performed m Delay Note ALO16 Settable AL021 Settable ALO22 Settable AL023 Settable ALO24 Settable ALO25 Settable AL026 Settable ALO31 Oil differential comp 1 DN Comp10FF manua settable AL032 Oildiferentialcomp2 f DN Comp20F manal settable AL033 Oil differential comp3 DN
58. etting screen is displayed This screen prevents access to the configuration branch by unauthorised persons 2 Enter the password default 1234 and press ENTER to confirm 3 Move to the last row INITIALISATION and press ENTER 4 Press the UP key Screen V3 comes up 5 Press ENTER and UP the message PLEASE WAIT will be displayed for a few seconds This operation deletes the permanent memory and enters the default values defined by Carel The default values differ depending on the type of board used If some standard values are not correct for the required application the user can always change them by accessing the screen or from the supervisor making the unit customised according to the specific application All the data set is stored in permanent memory to prevent it being lost when the unit is not powered Using the WINLOAD program the permanent memory can be read and saved to file for subsequent programming In this way different configurations can be modified read and saved for different models of unit using one board 3 3 Updating the software The software on the pCO boards can be programmed or copied in two ways using the hardware keys or using a computer 3 3 1 Hardware key There are two types of hardware keys One per the pCO family code PCO201KEYO 1 Mbyte version PCO202KEYO 2 Mbyte version and one for the pCO family code PCO100KEYO These are used to make an exact copy of the contents of the pCO complete with
59. ew inputs available or alternatively when using inverter control only 7 4 2 Fan management without inverter The operation of the fans depends on the operation of the compressors if at least 1 is configured and the value read by the discharge temperature or pressure probes In the default configuration proportional band control is activated which can be set on the screen Gc with FIFO rotation Gc respecting the various time settings 7 4 3 Fan management with inverter Manufacturer branch configuration screen C5 Parameters used Enable fan inverter Fan inverter offset Fan inverter differential Minimum inverter output Inverter speed up The fan inverter can be set on screen C5 A minimum value can be set for the inverter manufacturer branch general parameters screen G9 To assist the start of the inverter a time can be set expressed in seconds during which the inverter is operated at 10096 This parameter is called Speed Up manufacturer branch times screen T8 A RBI 10 Volt Key m DOffZ Device deactivation zone STPI Fan inverter setpoint RBI Inverter differential i Min In Minimum inverter output MM C Fan setpoint differential OutPress Supply press STPI C OutPress Fig 6 1 The management of the inverter varies depending on the type of control performed dead zone control or proportional band control Cod 030221991 rel 2 6 01 04 09 23 Standard compressor packs Dead zone c
60. exceed the threshold of 160 characters per message is 11 WARNINGS The SMS message must not contain spaces The message starts with a dot The fields in the message are separated by dots The message ends with the character amp not preceded by a dot EXAMPLE To reset the alarms in the software with 0000 the SMS message must be made up as follows pCO2 0000 D 095 000001 amp Mite indice To set the suction setpoint which is index 5 to the value 2 4 bar with an SMS message the message must be as follows pCO2 0000 A 005 002408 11 User interface The screens are divided into 4 categories NOT password protected screens these screens show the values read by the probes the alarms the operating hours of the devices the time and the date and can be used to set the setpoint and the clock USER screens password protected 0000 modifiable these are used to set the main functions times setpoints differentials alarms for the devices connected MAINTENANCE screens password protected 0000 modifiable these are used to run periodical checks on the devices calibrate the probes connected modify the operating hours and manually operate the devices Password protected MANUFACTURER screens password 1234 modifiable these are used to configure the system enable the main functions and select the devices connected N B The screens that refer to functions that are not available are not displayed T
61. ffline board 1 R 84 Alarm low discharge pressure from probe R 182 Alarm offline board 2 R 85 Alarm high discharge pressure from probe H 183 Alarm present board 1 R 86 Alarm low suction pressure from probe R 184 A Alarm present board 2 R 87 Alarm high suction pressure from probe H 88 Alarm max number of configurable inputs exceeded Cod 030221991 rel 2 6 01 04 09 48 Standard compressor packs Integer variables How INDEX Description Fow INDEX Description RW 11 Hour setting R 63 Operating hours of compressor 5 Digits lt 1000 RW 12 Minute setting R 64 Operating hours of compressor 6 Digits gt 1000 RW 13 Day setting R 65 Operating hours of compressor 6 Digits lt 1000 RW 14 Month setting R 66 Operating hours of fan 1 Digits gt 1000 RW 15 Year setting R 67 Operating hours of fan 1 Digits lt 1000 R 16 Current hour R 68 Operating hours of fan 2 Digits gt 1000 R 17 Current minute R 69 Operating hours of fan 2 Digits lt 1000 R 18 Current mo
62. he first screen A0 S0 is the one displayed when pressing the corresponding button then the arrow buttons are used to scroll to the others The codes Ax Bx Cx appear in the top right corner of the screens making them easier to distinguish The PSW symbol indicates screens where you are required to enter passwords The columns in the table represent the branches of screens 11 1 Password Some branches are protected by password The default values of these passwords are Branch Value User 0 Maintenance 0 Manufacturer 1234 Table 10 1 Once the password is entered it remains in the memory until automatically returning to the main screen so as to make it easier to move around within the same branch Cod 030221991 rel 2 6 01 04 09 35 Standard compressor packs Tree of screens KS MO 10 KO S0 PSW PO PSW CO M1 11 K1 S1 P1 RI M2 12 K2 S2 Pq CONF gt DEV INPUT P OUTPUT P M3 In K3 Sd P2 C3 DO EO M4 I3 K4 PSW 5 P3 C4 D1 E1 M5 H S6 H Ci D2 E2 19 S7 Pm C5 D3 E3 la S8 Pn C6 D4 E4 Ib S9 Po C7 D5 E5 Ic Sb P4 C8 D6 E6 Id Sc P5 Ck D7 E7 le Sa P6 c9 D8 E8 If P7 Ca D9 E
63. he setting or selection fields and store the set parameters Cod 030221991 rel 2 6 01 04 09 Standard compressor packs 2 4 BUILT IN DISPLAY BUTTONS for pCO or pCO AND PGDO F Layout of the buttons on the Built in and PGD keypads GR pCO builtin terminal Fig 2 3 Fig 2 4 Terminal buttons Button Function Description A ALARM Has the same functions as the button on the external terminal BI op db UP DOWN Have the same functions as on the external terminal The button has the same functions as the button on the external terminal while the LED underneath the ENTER GC i button indicates that the unit is on ESC ESC Returns to the previous branch Prg PROG Accesses the menu screens for entering the various sub branches Table 2 3 As you can see in the figure in this paragraph the Built in and PGDO displays have only 6 buttons the functions of the others are implemented as described below The unit can be switched on off from screen M5 in the main branch enabled only if a 6 button terminal is connected To access the branches of the software press the PROG button to display the list of the various branches To enter these branches scroll the items using the UP and DOWN buttons until highlighting the desired branch then confirm by pressing Enter Men s Set point i input output p user a mainten
64. hreshold given by the setpoint SP minus differential within which the time varies DTNZ Time between stop requests with HP prevent active Manufacturer branch general parameters screen T1 Stop delay between one compressor and the next if the high pressure prevention prevent function is active This applies both in the dead zone and in the proportional band Minimum compressor ON time Manufacturer branch general parameters screen T2 Sets the minimum time the compressors stay on that is once activated must remain on for the time set by this parameter Key R R Compressor call Cmp Compressor me TMinOn Minimum ON time T Maximum compressor off time Pm Cmp ee UE gt Ths TMIROR Fig 5 5 Time min ON compressor under inverter Branch constructor timing mask TA Determine min time ON of compressor 1 in the case of inverter configuration so one time enabled will stay ON for the min time setting Time min OFF compressor under inverter Branch constructor timing mask TA Set the min OFF time of compressor 1 in the case of configuration inverter so when you stop the system don t restart if the time from last OFF isn t passed Cod 030221991 rel 2 6 01 04 09 D Standard compressor packs Minimum compressor OFF time Manufacturer branch general parameters screen T2 Sets the minimum time the compressors stay off The devices are not started again if the minimum time selected has not elapsed since the last
65. ic or normally de energised NO Feeders logic Manufacturer branch general parameters screen G7 If the parameter is set for CppCppCpp mode the software gives priority to the complete start of the individual compressor while if the parameter is set for CCCpppppp start mode the software will first switch on all the compressors and then control the load steps Otherwise if the parameter is set for pCppC FULL refer to phase compressor stop from starting at compressor not in full capacity 10096 Compressor stop mode with load steps Manufacturer branch general parameters screen G7 If the parameter is set in ppppppCCC mode during the deactivation phase of the compressors first all the load steps are deactivated and then the corresponding compressors This procedure is useful to limit the number of stops and starts of the compressors so as to extend the life of the devices If the parameter is set in ppCppCppC mode when the compressors are being stopped priority goes to the complete stop of the individual compressor so as to more frequently alternate which compressors are started obviously only with FIFO rotation 6 1 7 Compressor rotation Manufacturer branch general parameters screen G5 The rotation of the compressors balances the number of operating hours and starts of the compressors Rotation occurs only among the compressors and not among the capacity controls The rotation function automatically excludes any compressors
66. ime mask T8 Parameter visible only if enable invertef fan For a stable of the unit controlled is necessary set a offset that delay the off of the inverter Can be visualize in bar or in degree C can be used in a proportional regulation plus integral Number of fans forced on with probe 2 fault Manufacturer branch general parameters screen Gd In the event of a discharge probe fault or not connected alarm this parameter indicates how many fans are forced on 7 2 Fan time settings Time between start requests dead zone Manufacturer branch times screen T6 Displayed only if the fan dead zone is enabled Represents the time between different fan start requests in the activation zone DonZ Key DOffZ Device deactivation zone NZ Dead zone DOnZ Device activation zone DZN Dead zone differential OutPress Suction pressure read SP Fan setpoint OutPr ess Fig 6 4 Time between stop requests dead zone Manufacturer branch times screen T6 Displayed only if the fan dead zone is enabled Represents the time between required stops different fans in the deactivation zone DOffZ Minimum time between starts of different fans Manufacturer branch times screen T7 This represents the minimum time that must elapse between when one device starts and the next This parameter is used to avoid starts that are too close together It is useful with proportional band fan control Speed Up time Manufacturer branch times screen
67. ith and makes the inputs and outputs that can actually be used available For the pCO controllers check that the dipswitches on the board for the configuration of the type of analogue inputs are positioned correctly for more information see the pCO manual Number of compressors and fans The first step involves accessing the screen C4 CONFIGURATION to set the number of compressors fans and load steps to be managed On the external terminal ENTER MANUFACTURER PASSWORD Go to CONFIGURATION then press Use UP and DOWN a v to scroll the screens until reaching C4 The number of compressors to be managed with the suction probe can be set directly by the user screen C4 who must bear in mind the number of relay outputs available depending on the model 5 pCOXS outputs 8 Small outputs 13 Medium outputs 18 Large outputs The pCO depending on the board used can manage from a minimum of 1 compressor to a maximum of 6 with the same or different capacities The number of condenser fans available ranges from 1 to 16 After having set modified the number of controlled devices on screen C4 compressors fans load steps it is recommended to update the configuration parameters for the outputs on screens E0 E1 E9 Ea Eb Output configuration After having accessed screen C4 press once to return back one level Devices gt Input positions use to place the cursor on OUTPUT POSITIONS and press e OUTPUT POSITIONS
68. l input 15 R 161 Status of fan 10 R 40 Status of digital input 16 R 162 Status of fan 11 R 41 Status of digital input 17 R 163 Status of fan 12 R 42 Status of digital input 18 R 164 Status of fan 13 R 45 Status of load step 3 compressor 1 R 165 Status of fan 14 R 46 Status of load step 3 compressor 2 R 166 Status of fan 15 R 47 Status of load step 3 compressor 3 R 167 Status of fan 16 R 48 Status of load step 3 compressor 4 RW 168 Enable setpoint with EXV R 49 Status of load step 3 compressor 5 RW 175 Confirm hour setting R 50 Status of load step 3 compressor 6 R 176 Enable general probe H 51 Status of digital input 7 expansion RW 177 Setpoint setting 1 bar R 52 Status of digital input 8 expansion RW 178 Enable compressor modulating setpoint RW 94 Silent buzzer RW 179 Enable fan modulating setpoint RW 95 Reset alarms R 185 Status compressor 7 RW 96 Confirm hour setting R 186 Status compressor 8 RW 97 Confirms minutes setting R 187 Status compressor 9 RW 98 Confirms day setting R 188 Status compressor 10 RW 99 Confirms month setting R 189 Status compressor 11 RW 100 Confirms year setting R 190 Status compressor 12 n 101 Unit on R 191 Status pump 1 RW 102 Input logic R 192 Status pump 2 RW 103 Alarm control logic RW 104 Enable compressor inverter Cod 030221991 rel 2 6 01 04 09 47 Alarms sent to the supervisor Standard compresso
69. m value When even just one manual procedure is enabled on the main screen MO the message gt gt Manual oper lt lt is displayed If the card turns off and turns back on manual activation ends Warning Use this function with care Operating the devices manually may cause damage to the installation 8 8 Auxiliary pump management Manufacturer branch device configuration screen C6 In some systems a liquid level pump needs to be operated when the installation is on The operation of the pump is therefore related solely to the unit ON status This digital output can also be used as a system on signal e Always ON e With unit ON e With compressor ON e With fan ON If you set two pumps is possible to set a rotation pump by the time or the start up using the parameter on the mask Gj Some example of use can be signal life of PCO pump liquid level You can set the delay on OFF system and the time of rotation between the devices Note There are no safety protection for this device 8 9 Type of refrigerant Manufacturer branch device configuration screen Ch By selecting the type of refrigerant used in the installation the software will automatically calculate the conversion of the pressure to degrees centigrade and degrees Fahrenheit The following table lists the types of gas managed Refrigerant Complete name R22 Chlorodifluoromethane H134a Tetrafluoroethane R290 Propane R600 Butane
70. mask C9 The parameter mean if in the system is avaible of the double tecnology mechanical valve and electronic valve If in the system are avaible electronic valve and mechanical valve from supervisor variable 168 it is possible to decide how work the system with a different setpoint based on the type of valve used worky Typically using electronic valve the system can work with a different pression of evapotation and condensation with a great energy saving This function can be used for changing the set from supervisor without working directly on the setpoint The offset can be find on the branch set point on the mask Sb and Sc Cod 030221991 rel 2 6 01 04 09 28 Standard compressor packs 8 6 Change setpoint from digital input Constructor branch device configuration mask Ck Enabling this function is possible closing the digital input adding a offset at the setpoint of compressor and or the fan mask Sb Sc This function is necessary when you want change the working point Can work with the time zone and the setpoint modulation 8 7 Manual device operation Maintenance branch screens Bh Bi Bj Bk Bn Bm Bp Br The individual devices can be activated manually ignoring the times and the rotation and independently from the temperature control functions The only support provided in manual operation is the alarm management function The manual activation of the speed controllers sets the corresponding outputs to the maximu
71. mperature of the gas in the compressor pack screen Pi DEff Te Change in efficiency of the compressor pack per C of evaporation temperature it is recommended to leave the default of 3 screen Pi TcVirt Condensing temperature of the gas in the compressor pack screen Pj DEff Tc Change in efficiency of the compressor pack per C of condensing temperature it is recommended to leave the default of 2 screen Pj The software automatically calculates the estimate of the increase in efficiency screen A7 DEff DEffTe Te TeVirt DEffTc Tc TcVirt As well as the instant value the daytime average DEff day night time DEff night daily monthly and annual averages can be displayed screens A8 A9 Aa Ab calculated using this ratio current value previous value total unit of time considered 8 13 Prevent high discharge pressure Manufacturer branch general parameters screen G3 and screen P9 In order to prevent the activation of the general high pressure switch total shutdown of the compressors with manual reset a prevention function can be enabled by setting a pre alarm threshold this function gradually decreases the capacity of the unit The high pressure prevention Prevent HP function is only enabled during the activation and deactivation of the compressors and their load steps If the discharge pressure exceeds the threshold set screen G3 the activation of any compressors is disabled and a prevent
72. ms 0 10 0 2 5 Pulse amplitude Only on pCO pCO Comp 1 2 6 power R W GfGg Power of single compressor Used to control compressors having kW 0 5000 0 different capacities Number of compressors RAV Gb _ iif there is a faulty or disconnected suction probe alarm it forces no 0 6 1 orced on with probe fault compressors that are on They are in any case controlled by single alarms and by general pressure switches Fan rotation RAW Gc lype of fan rotation FIFO rotation the first to turn on is the last to Disabled HFO turn off HFO Fan control RAW Gc lype of fan control Proportional band or Dead zone Proportional band Proportion Deadzone alband Type of fan control RAW Gh Type of fan control P Proportional or P 1 Proportional is integral P P I P Can be seen only if Proportional Band is enabled Integr time only P RAW Gh ___ Integrating time of P I control S 0 999 600 Number of fans forced on RAW Gd fthereisa faulty or disconnected discharge probe alarm it forces 0 16 2 with probe fault no fans that are on They are in any case controlled by single alarms and by general pressure switches Controlled fans with RAN Gi Controlled fans with comnpressors off enable N S N comnpressors off enable Type of general discharge RAW Ge Type of general high pressure switch reset Automatic Auto pressure switch reset manual Cod 030221991 rel 2 6 01 04 09 44 Pump management ON with
73. must be connected to input B3 to measure the instant power Go to screen Cf to set the limits The software shows on screens Ad Ae Af Ag Ah The current daily consumption in kWh The current monthly consumption in MWh The current annual consumption in MWh The consumption of the previous day in kWh The consumption of the previous month in MWh The consumption of the previous year in MWh The current consumption in the band set in the user branch screen Ph The total consumption in MWh The user can enter two start and end count times and the C day consumption corresponding to the period between the start and end and the C night consumption period between end and start can then be displayed For example if the start time is set to 07 00 and the end time to 20 00 the C day consumption is the band between 07 00 and 20 00 At 20 00 the C night count starts and the C day value is saved The day next at the start time the daytime count starts C night is saved C day is reset and the C day consumption starts counting again Likewise for C night The consumption is displayed for the current band and for the same band on the previous day 8 12 Calculate estimated efficiency function Function available only if the clock card is fitted Manufacturer branch device configuration screen Cj The application can calculate an estimate of the efficiency to do this the user needs to set four parameters TeVirt Evaporation te
74. n Cc pressing ENTER displays the value in degrees Celsius or Fahrenheit Discharge press R 0 Pressure measured by the outlet sensor on the compressors discharge bar Screen Cd pressing ENTER displays the value in degrees Celsius or Fahrenheit Intake time R MO Temperature measured by the intake sensor on the compressors suction C F 40T120 C pressing ENTER displays the value in degrees Celsius Fahrenheit or bar Discharge temp R MO Temperature measured by the outlet sensor on the compressors discharge C F 407120 C pressing ENTER displays the value in degrees Celsius Fahrenheit or bar Unit Status R MO Unit status ON OFF from alarm OFF from supervisor 1 2 9 Restart after Blackout OFF from remote input OFF from button gt gt Manual oper lt Install default OFF from screen Gas type R MO Type of gas used in the installation R404a N R MO Address unit visible at the moment 1 6 Compressor status R M1 M6 Status compressor 1 2 12 Control status R M1 M6 Type and status of compressor control Fan Status R M2 Fan status Control status R M2 Type and status of fan control Fan inverter status R M3 Fan inverter status 0 100 Compressor inverter status R M3 Compressor inverter status 0 100 Auxiliary room temperature R MA Auxiliary room temperature probe C 40T90 C probe Auxiliary outside temperature R 4 Auxiliary outside temperature pr
75. nable ON OFF of units from digital input has priority over that of Y N N Dig Input keypad Enable inputs RAW C8 Enable liquid level alarm from digital input display only Y N Y Liquid level Enable inputs HI Ck Enable common oil differential alarm Y N Common oil diff Enable inputs RAW Ck Enable common fan thermal overload alarm display only Y N Com fan thermal overload Enable inputs RAW Ck Enable change of setpoint from digital input Y N Setpoint change from DIN The setpoint changes depending on the offsets entered on the screens Sb Sc Enable electronic expansion R W C9 Enable expansion with the help of the electronic valve Y N N valve Type of NTC suction probe RW Ca Defines type of suction probe NTC 0 1 V 4 20mA 0 10 V 0 20 mA 4 20 mA 0 5V input no B1 RAW Ca position of the suction probe B1 or B7 B1 B7 B1 only for pCO2 Medium or Large Type of NTC discharge probe RAW Cb Defines type of discharge probe NTC 0 1 V 4 20mA 0 10 V 0 20 mA 4 20 mA 0 5V input no B2 RAW Cb Defines the position of the discharge probe B2 or B8 B2 B8 B2 only for pCO2 Medium or Large Suction pressure probe R V Cc Suction probe full scale setting bar 10 0 40 0 0 5 7 Discharge pressure probe RAW Cd Discharge probe full scale setting bar 10 0 40 0 0 30 Customise name RAW Ce General probe name setting 11 characters GEN General probe TEMP Cod 030221991 rel 2 6
76. ncern the same subject and that can be easily scrolled by pressing the arrow buttons the branches are accessed by pressing one of the buttons on the terminal which displays the first screen in the loop Range range of values allowed for a parameter Set point defines a pressure or temperature value to be met the system activates or deactivates the devices until the measured value equals the setpoint Buffer memory memory on the board used to save the default values set by CAREL for all the parameters Permanent memory even without power Upload is the operation with which the application software is copied from the computer or programming key onto the pCO pCO pCO boards Analogue value total value with decimal sign and point Digital value value with only two sates Integer integer without decimal point CAREL SpA reserves the right to make modifications or changes to its products without prior notice Cod 030221991 rel 2 6 01 04 09 57 60 v0 L0 PaP 0 Cat 1661220E0 l3HV9 PO Agency CAREL
77. ncoming evaporator efficiency delta RW 84 High discharge pressure pre alarm setpoint RW 37 Outgoing efficiency delta R 85 Value read by probe B6 RW 38 Current efficiency R 86 Value read by probe B7 RW 39 Current daily efficiency R 87 Value read by probe B3 RW 40 Current night time efficiency R 88 Gas suction temperature RW 41 Current annual efficiency R 89 Converted gas suction temperature RW 42 Previous daily efficiency R 90 Actual comp setpoint converted into temperature RW 43 Previous monthly efficiency H 91 Actual fan setpoint converted into temperature RW 44 Previous annual efficiency RW 92 Modulating setpoint from supervisor H 45 Current daily efficiency with time band RW 93 Maximum compressor modulating setpoint R 46 Previous daily efficiency with time band RW 94 Minimum fan modulating setpoint R 47 Previous night time efficiency with time band RW 95 Compressor suction temperature R 48 nstant consumption RW 96 Max setpoint delta modulation compressor Delta R 49 Current daily energy consumption x 1000 RW 101 CutOff ventilatori R 50 Current daily energy consumption x 1000 R 51 Current monthly energy consumption x 1000 Cod 030221991 rel 2 6 01 04 09 46 Digital variables Standard compressor packs
78. nd a differential settable on screen S1 and on the value read by the suction probe In the default configuration dead zone control is activated settable on screen G5 with FIFO rotation G5 respecting the various compressor times see the corresponding paragraph For a description of dead zone or proportional band operation see the corresponding paragraph Cod 030221991 rel 2 6 01 04 09 17 Standard compressor packs 6 1 4 Compressor management with inverter Manufacturer branch configuration screen C5 If control is configured with inverter no capacity control can be used and at least one compressor must be configured Parameters used enable inverter C5 offset inverter S6 time to reach 10096 inverter output S6 minimum inverter opening compressor G9 min time on compressor with inverter TA min time off compressor off inverte TA min time on betweeen comressor start with inverter TB maximum start request time PI minimum start request time PI maximum stop request time Pm minimum stop request time Pm e differential pressure within which the time varies Pn Description of Operation The compressor inverter can be activated on the screen C5 if no load steps are configured on screen C4 A lower limit can be set for the inverter on screen G9 The compressor under inverter has a min time safety see the rleative section The inverter is managed as follows dead zone control and proportional ban
79. nput 10 R 31 Type of probe connected to delivery R 89 Type of device connected to input 11 R 32 Bios version R 90 ype of device connected to input 12 R 33 Bios date R 91 Type of device connected to input 13 R 34 Boot version R 92 Type of device connected to input 14 R 35 Activation date R 93 Type of device connected to input 15 RW 36 Compressor integration time in proportional operation R 94 Type of device connected to input 16 RW 37 Maximum delay of compressor activation dead zone R 95 Type of device connected to input 17 RW 38 Maximum delay of compressor deactivation dead zone R 96 Type of device connected to input 18 RW 39 Compressor minimum operation time R 97 Type of device connected to output 1 RW 40 Compressor minimum OFF time R 98 Type of device connected to output 2 RW 41 Min time between different Compressors R 99 Type of device connected to output 3 RW 42 Minimum time between starts by a single compressor n 100 Type of device connected to output 4 AW 43 Delay between load steps R 101 Type of device connected to output 5 RW 44 Delay of fan activation dead zone n 102 Type of device connected to output 6 RW 45 Delay of fan deactivation dead zone R 103 Type of device connected to output 7 RW 46 Minimum time between starts of different fans R 104 Type of device connected to output 8 RW 47 Oil diff pressure alarm delay at start up R 105 Type of device connected to output 9 RW 48 Liqui
80. nt C night reset Delta efficiency total Reset R W Bc Reset total efficiency Y N N Last maintenance date RAV Bd Setlast maintenance date 1 31 day month year 0 23 0 99 Unit type RAN Bd Settype of compressor pack LT NT Probes calibration Suction RAW Be Suction probe calibration bar 99 9 99 9 0 Outlet Discharge probe calibration Probes calibration Probe gas R W Bf as probe calibration ppM 9 9 9 9 0 Probes calibration Probe ext RW Bf Outside probe calibration 2b 9 9 9 9 0 Enabling compressors RAW Bg J emporarily disables the operation of an individual compressor Y N d Compressor 1 2 12 HI Bh Bi anually operate compressors 1 2 6 Y N N Bm This action does not shut the unit down Step 1 HI Bh Bi anually operate step 1 on compressor 1 2 6 Y N N Bm This action does not shut the unit down Step 2 HI Bh Bi anually operate step 2 on compressor 1 2 6 Y N N Bm This action does not shut the unit down Cod 030221991 rel 2 6 01 04 09 38 anually operate step 3 on compressor 1 2 6 This action does not shut the unit down Standard compressor packs Parameter Type Screen Description Range Default Note TUS Step 3 Fan power ON Fan 1 2 16 anually operate fan 1 2 16 Manual operation Comp anually operate the inverters at 10096 for the compressors and fans Enter new password INPUT OUTPUT SCREENS En
81. nth R 70 Operating hours of fan 3 Digits gt 1000 R 19 Current year R 71 Operating hours of fan 3 Digits lt 1000 R 20 Current day R 72 Operating hours of fan 4 Digits gt 1000 RW 21 Oil diff pressure alarm delay in service R 73 Operating hours of fan 4 Digits lt 1000 RW 22 Type of inputs per compressor RW 74 Fan on hours alarm threshold x1000 RW 23 Number of compressors R 75 Version of the application RW 24 Number of fans R 76 Operating hours of fan 5 Digits gt 1000 RW 25 Number of load steps R 77 Operating hours of fan 5 Digits lt 1000 R 26 Fan inverter status 1 0 1000 R 78 Delay in restart after a blackout R 27 Compressor inverter status 2 0 1000 R 79 Type of device connected to input 1 Type of board connected 1 pCOxs 10 Large 11 R 80 Type of device connected to input 2 R 28 Medium 12 Small R 81 Type of device connected to input 3 R 82 Type of device connected to input 4 Status of the unit 0 Unit ON 1 OFF from alarm 2 i 83 Type of device connected to input 5 OFF from Supervisor 3 Re start after Blackout 4 OFF R 84 ne device connected to input 6 R 29 from input Remote 5 OFF from button 6 Manual op R 85 type of device connected to input H 7 Install Default 8 OFF from screen R 86 ype or device connected to input 8 9 PREVENT IN PROGRESS R 87 ype of device connected to input 9 R 30 Type of probe connected to suction n 88 Type of device connected to i
82. obe C 40T90 C probe Auxiliary probe for R M4 Auxiliary probe for detecting gas leak ppM gas leak Start up unit RW M5 JUsedto switch the unit on if using a 6 button terminal No Yes 15 button terminal MAINTENANCE button 6 button terminal PROG button and MAINTENANCE in the menu Compressor working hours R A0 A3 Displays the operating hours of compressors 1 2 12 saved every 3 hours 0 999999 1 2 12 hours Fan working hours R A5 Displays the operating hours of fans are saved every 3 hours hours 0 999999 Instant Delta efficiency R A7 Displays the instant efficiency value of the installation 0 99 9 Delta efficiency Current daily R A8 Displays the current daily 0 99 9 Current monthly monthly and annual efficiency Current annual Delta efficiency Daily old R A9 Displays the daily 0 99 9 Monthly old monthly and annual efficiency before the current efficiency early old Delta efficiency R Aa ndicates the time band in which the current daily efficiency 96 0 99 9 00 00 C day 00 00 percentage is calculated and displays the current daily efficiency C day current 25 596 percentage Delta efficiency R Ab ndicates the time band in which the previous daily efficiency 96 0 99 9 00 00 C day 00 00 percentage is calculated and displays the previous daily efficiency Cday old 25 596 percentage and previous night time efficiency percentage Cod 03022
83. oint compressors RW P2 Upnper and lower limit of the compressor setpoint bar C 95T95 or 0 1 Min Max 5T70 2 5 Setpoint fans HAN P3 Upper and lower limit of the fan setpoint bar C 95195 or 1 0 Min Max b5T70 25 0 Dead zone regulation comps RW PL Maximum time and minimum time for compressor start in dead zone S 0 9999 60 Max time 20 Min time Dead zone regulation comps R AW Pm Maximum time and minimum time for compressor stop in dead zone S 0 9999 60 Max time 10 Min time Dead zone Delta pressure RAW Pn Pressure differential within which the compressor start stop time is bar 0 99 9 0 5 within which the time proportional to the suction pressure changes Delay alarm compressor RAW Po jGeneric compressor thermal overload alarm delay S 0 99 0 input Alarms Oil diff delays Startup R W P4 Qil differential alarm delay if configured S 0 360 120 alarm times at compressor start Alarms Oil diff delays running RAW P4 Oil differential alarm delay if configured S 0 99 10 alarm times with compressor in stable operation Alarms relay delay RAW P5 Change in alarm relay status delay S 0 999 1 LP auto man change 5 RW P5 QOnthe fifth activation within the set time the low pressure alarm m 0 999 10 alarms within from pressure switch changes from automatic to manual reset Suction alarm high thresh RAW P6 Suction probe alarm high threshold setting bar C 95T95 or 4 0 0 5 to 7 0 bar Suction
84. old rooms display cases could even operate with a higher evaporation temperature in certain conditions thus cutting operating costs An external device will calculate whether and by how much the evaporation setpoint of the pack is to change and consequently the evaporation temperature This device will communicate the calculated setpoint to the pCO through the supervisor line The pCO will have safety devices in order to prevent possible errors e Enabling the modulating evaporation setpoint Pr D Minimum setpoint it will have the same values as the classic setpoint e Maximum setpoint D Setpoint unit of measure Parameter Pq C or bar e Maximum allowable change of the setpoint Pr Recovery time Pq SP A Max Key SP Evaporation setpoint T Time Max Minimum setpoint value Min Minimum setpoint value Min AT Recovery time ASP Maximum allowed change to the setpoint ro Tm Fig 73 Every 5 minutes the supervisor can increase the setpoint by a variable offset no higher than the maximum allowable change Pr and however no higher than the maximum allowable setpoint S2 The evaporation setpoint will start from the minimum setpoint S2 every time the card is turned on If the supervisor goes offline for more than 20 minutes fixed time the setpoint starts to gradually drop recovery time Pq until it reaches the minimum setpoint 8 5 Setpoint change from supervisor Constructor branch device configuration
85. on the type of compressor safety devices connected to the inputs can be defined The possible choices are as follows Cod 030221991 rel 2 6 01 04 09 12 Standard compressor packs Language selection The user can set the display language in two ways The first way it to press ENTER at power on this function can be disabled by setting the parameter on screen V3 The second is accessed from the main screen MO pressing PROG for the Built In or PGDO terminal press PROG and go to the row USER gt and press ENTER then enter the password default 0 The P1 screen is displayed press ENTER until the desired language appears The software currently manages six languages Italian English French German Spanish and also Russian but only for the PDGO terminal Unit ON OFF There are various ways to activate or deactivate the controller and the management of the various devices with related alarms in order of priority 1 From the alarm the screen Pe can be used to select if a faulty probe alarm turns the unit off or not 2 From the supervisor the screen Pe is used to enable the unit to be switched off from the supervisor 3 From digital input if configured C8 in addition to the screen G1 the logic can be selected NO or NC 4 From the keypad if enabled on the screen B1 pressing the ON OFF button turns the unit on or off For Built in or PGDO terminals to switch the unit on off simply go to the main screen M1 and press th
86. ontrol This control requires the setting of a deviation 4 from the setpoint and the inverter activation time in screen S7 setpoint branch The inverter is set on the first fan which will always be the first to start and the last to stop Three zones are defined activation zone DOnZ dead zone NZ and deactivation zone DOffZ in which the program behaves differently see the figure In the activation zone DOnZ the fans are started as follows Fan 1 which is managed by the inverter is activated as soon as there is demand The inverter output is increased if the inverter output reaches 10 volts a fan is started respecting the rotation and the times If the request continues all the other fans are started respecting the rotation and the times In the dead zone NZ the inverter output does not undergo any variation and no fans are started or stopped In the deactivation zone DOffZ the fans are stopped as follows The inverter output is gradually brought to the minimum value If the stop request continues all the fans are stopped respecting the rotation and the times The last fan to switch off will be fan 1 OutPress A Key B OutPress Supply press B Setpoint differential STM i1 1 1 bod dum o Kee epar agr po STPM Supply setpoint a iun DOnZ Activation zone Inverter A it Ts DOffZ Deactivation zone M d END ME NZ Dead zone 10V ks aaa ELLE a T s Maximum compresso
87. orarily disabled from the control sequence This function is very useful when needing to perform maintenance on an individual compressor The alarms of the disabled compressor will also be disabled Cod 030221991 rel 2 6 01 04 09 20 Standard compressor packs 6 3 Compressor timers The following is a list of all the time parameters used for compressor management Maximum start request time dead zone User branch screen PL In the activation zone Dorz the call time decreases when moving away from the dead zone in this way the compressor calls are more frequent and the pressure returns more quickly into the dead zone Near the point b setpoint differential the time will be equal to the maximum on time TOnMax e DINZ yi RBM E DTNZ gt TOffMin D SP B C InPress bar Fig 5 4 Minimum start request time dead zone User branch screen PL The compressor call time equals the minimum start request time TOnMin if the pressure InPress exceeds the threshold point C given by the setpoint SP differential RBM differential within which the time varies DTNZ Maximum stop request time dead zone User branch screen PL Near the setpoint SP the compressor stop request time will be equal to the maximum off time TOffMax Minimum stop request time dead zone User branch screen PL The compressor stop time equals the minimum stop request time TOffMin if the pressure InPress falls below the t
88. out maintenance and calibration and manually control any devices Displays the alarm log Displays the status of digital and analogue inputs and outputs and the input output configuration Displays sets the clock and the time bands Used to set the set point and differentials Used to set the various operating parameters thresholds delays etc Pressing these buttons at the same time accesses the unit configuration Displays the version of the application software and other information on the unit No function associated No function associated Functions of the silicon rubber buttons 1 ON OFF switches the unit on and off Table 2 2 Fig 2 2 2 ALARM to view the alarms on the display cancel them and silence the alarm buzzer 3 UP ARROW It has two functions to scroll the previous screens of the same branch when the cursor is in the home position and to increase the value of a setting field when the cursor is on it however if it is a selection field pressing the arrow button displays the previous associated text 4 The DOWN ARROW has two functions to scroll the subsequent screens of the same branch when the cursor is in the home position and to decrease the value of a setting field when the cursor is on it if however it is a selection field pressing the arrow button displays the next associated text 5 ENTER lets you move the cursor between the home position and t
89. quently do not use 380 Vac 24 Vac transformers to supply the controller if phase and neutral are used to directly supply the speed control boards Connect the earth terminal where envisaged to the earth on the electrical panel ON OFF fan management code CONVONOFFO The CONVONOFFO modules convert the PWM signal sent from terminal Y3 on the pCO1 pCO to an ON OFF signal so Y3 can be used to control a relay Switching power 10A at 250 Vac in AC1 1 3 HP inductive PWM to 0 to 10 Vdc or 4 to 20 mA conversion board for fans code CONVO 10A0 The CONVO 10A0 modules convert the PWM signal sent from terminal Y3 on the pCO1 pCO to a standard 0 to 10 Vdc signal or 4 to 20 mA signal Calculation of the minimum and maximum fan speed Manufacturer branch general parameters screen Ga This procedure should only be performed if fan speed control boards are used code MCHRTF 0 0 It must be stressed that if the ON OFF modules code CONVONOFFO or the PWM 0 to 10 V converters code CONVO 10A0 are used the Min triac parameter should be set to zero and the Max triac parameter to the maximum value Given the range of different motors existing on the market the voltages supplied by the electronic board that correspond to the minimum and maximum speed can be set For this purpose and if the default values are not suitable proceed as follows 1 Set the fan inverter to always On Force inverter parameter screen Br maintenance branch
90. r From 07 00 to 20 00 the set is 16 0 bar Tab 8 2 Legend SP Setpoint t time In modulating setpoint case the offset relative to different time bands will modify the limit of setpoint Cod 030221991 rel 2 6 01 04 09 2 Standard compressor packs 8 3 Modulating condensation setpoint User branch screen Pt In order to cut power costs it is useful to have a condensation temperature as low as possible The condensation setpoint can be tied to the external temperature value plus a settable offset Dh You have to enable the external temperature probe B6 and set several parameters in order to get this function e Modulating setpoint PT enabling e Offset to be added to the external temperature expressed in Celsius Pt e Lower limit of the condensation setpoint Sd e Upper limit of the condensation setpoint Sd D Setpoint unit of measure Parameter Pq C or bar Temp Key C ET Outside temperature Max STP Fan setpoint l Max Maximum allowable setpoint Min Minimum allowable setpoint AT Offset to be added to the external temperature Min AT T s Fig 7 2 By enabling the modulating setpoint fan inverter operation will be associated with the external temperature 8 4 Modulating evaporation setpoint User branch screen Pr Sometimes in a supermarket it can be useful to provide the management of the compressor pack information about the status of the entire system In fact the system terminals counters c
91. r of compressors forced on so as to ensure minimum cooling operation of the installation 6 2 Compressors with different capacities At times it is useful to have different capacity compressors in the same installation These allow more load steps and therefore finer control Screen Ci is used to set the rotation of different capacities Once the capacity of the individual compressors has been defined screens De and Df the software will calculate the maximum capacity Based on the requirements of the installation and the compressors available without alarms or timers the software will calculate the most suitable combination to satisfy the requirement Whenever the requirement changes the software recalculates the most suitable combination The combination will always be greater than or equal to the requirement Currently the software does not manage compressors with different capacities with capacity control or inverters If two compressors have the same capacity the compressor with the lower index will always be the first to start 6 2 1 Proportional band control with different capacity compressors Based on the pressure the setpoint and the differential the software will proportionally calculate the capacity required to bring the pressure back near the setpoint At the setpoint differential the requirement will be at the maximum value while it will be null for pressure values around or less than the setpoint Max Capacity x Setpoint
92. r off time Pm Inverter Inverter status NFan Number of fans on E T iT MU E it 1 2 eee LS 0 qi 3 E 41 L i 2 L L 1 Tis Proportional band control The control requires the setting of a deviation 4 from the setpoint found on the setpoint branch screen S7 and of an inverter differential RBI on screen S9 If the value measured by the discharge probe is less than or equal to point A setpoint value inverter offset of Fig 6 3 the inverter output will be 0 Between point A and point C setpoint differential the value of the inverter output will be proportional to the value read by the discharge probe and in any case not less than the minimum inverter output Minln If the value measured by the discharge probe is greater than or equal to point C the inverter will be at the maximum of its capacity The control is therefore not associated with any fan and can work even without fans being configured For the management of the fan steps see paragraph Inverter RB Key GERS RB Fan differential RBI Inverter differential We CUT CutOFF inverter fan STPM Discharge setpoint A Discharge setpoint Offset C Inverter setpoint inverter differential Min In B Discharge setpoint Fan differential Min In Minimum value of the inverter control output OutPress Supply press OutPress EH CUT STPM A B Fig 6 3 7 1 4 Fan rotation Manufac
93. r packs Fow INDEX Description Fow INDEX Description R 53 Alarm thermal overload compressor 1 R 89 Alarm max number of configurable peripheral units R 54 Alarm thermal overload compressor 2 exceeded H 55 Alarm thermal overload compressor 3 R 90 Alarm clock defective or battery exhausted H 56 Alarm thermal overload compressor 4 R 91 Defective input probe or disconnected alarm R 57 Alarm thermal overload compressor 5 R 92 Defective output probe or disconnected alarm R 58 Alarm thermal overload compressor 6 R 93 Clock alarms R 59 Alarm high low pressure compressor 1 R 137 Refrigerant leak R 60 Alarm high low pressure compressor 2 R 140 Alarm thermal overload on fan 5 R 61 Alarm high low pressure compressor 3 R 141 Alarm thermal overload on fan 6 R 62 Alarm high low pressure compressor 4 R 142 Alarm thermal overload on fan 7 R 63 Alarm high low pressure compressor 5 R 143 Alarm thermal overload on fan 8 H 64 Alarm high low pressure compressor 6 R 144 Alarm thermal overload on fan 9 R 65 Alarm oil diff pressure compressor 1 R 145 Alarm thermal overload on fan 10 H 66 Alarm oil diff pressure compressor 2 R 146 Alarm
94. re greater than or equal to point C same call time as TOnMin In the deactivation phase on the other hand the following cases are possible 1 Pressure equal to point SP same call time as TOffMax 2 Pressure between point SP and point D call time between TOffMax and TOnMin 3 Pressure less than or equal to point D gt same call time as TOffMin N B To make the device call time constant in the activation phase simply set the times TOnMax and TonMin to the same value Similarly in the deactivation phase set the times TOFFMax and TOFFMin to the same value Cod 030221991 rel 2 6 01 04 09 16 Standard compressor packs 6 Compressor management The program can manage compressors with the same capacity or with different capacities Each compressor is associated with digital inputs used for the safety devices and outputs used to enable activation and where necessary capacity control Inputs used e Suction pressure e Digital inputs dedicated to the compressor safety devices e General suction pressure switch e General discharge pressure switch Parameters used e type of inputs configured number of compressors number of load steps enable compressor inverter type of rotation type of control dead zone or inverter compressor times compressor setpoint e compressor differential Outputs used e compressors e load steps e compressor speed control In the default configuration dead zone control is activated sett
95. rvision system Identification Supervisor configuration Identification number of the pCO card for the serial supervision network Type of protocol Protocol type setting CAREL Supervisor Modbus Supervisor or GSM Modem New password Manufacturer Lets you change the password for entering the manufacturer branch Lets you change the password for entering the maintenance branch Lets you change the password for entering the user branch message for changing the language on start up Lets you enable disable the display of the language change screen when the card starts Installation of default values Cod 4 030221991 rel 2 6 01 04 09 Lets you delete all of the permanent memory and reset the default settings 45 Table 11 1 13 Supervisor communication variables Standard compressor packs The pCO can be connected to a local or remote supervisor telemaintenance system for managing the unit The accessories available for the pCO boards include an optional RS485serial communication card In this version of the software the baud rate can be set to 1200 2400 4800 9600 or 19200 bps The variables sent and received by the supervisor are shown in the tables below with reference to the following key
96. sert setpoint password Enter setpoint password 0 9999 Compressors Inv Offset Compressor inverter offset setting bar C min max comp set Climb up inverter time Time taken by the inverter to reach full output S 0 999 Fans Inverter Offset Fan inverter offset setting bar C min max fan set Climb up inverter time Time taken by the inverter to reach full output S 0 999 Compressor differential Settings bar C 0 20 0 Fans compressor differential fan differential Inverter differential Settings bar C 0 99 9 compressor inverter differential fan inverter differential Compressors auxiliary offset Auxiliary compressor setpoint offset Used to change the setpoint bar C 99 9 99 9 setpoint from digital input or electronic valve Fans auxiliary offset setpoint Auxiliary fan setpoint offset Used to change the setpoint from digital bar C 99 9 99 9 input or electronic valve Insert new password Enter a new setpoint password 0 9999 15 button terminal PROG button 6 button terminal PROG button and USER in the menu Insert user password RAN PO Enter user password 0 9999 0 Current language ENGLISH RAW P1 Based on the configuration installed the language used on the 5 languages press ENTER to change screens can be changed language TALIAN ENGLISH FRENCH GERMAN SPANISH and only PGDO RUSSIAN bar C setpoint setting RAW Pq Configure the setpoint in degrees centigrade or pressure bar C bar C bar Setp
97. sonnel who are aware of the necessary precautions Disconnect the machine from the mains power supply before accessing any internal parts Disposal of the parts of the controller The controller is made up of metal and plastic parts and contains a lithium battery All these parts must be disposed of according to the local standards in force CONTENTS 1 The Program ir iih race ra cad eic te eed to eee OI DR receta e edere etus Ha ve nte rd e eMe edepol 7 1 1 Main new features in version 2 0 me 1 2 MairiCharaGtenstiCs cess anA i A A EET a A Aa e s s s AAR ans 7 13 Gormpatible Hardware ERE E 7 2 The user terminal 241 LEDs under the buttons 22 Display eebe Ment ente pete ia 23 15 key PCOT PCOI OR FGD l external terminal ssssssssssssssscccccsssssssssusssssccccesssssssnsssseeseesecssssssssssussseseseecesssssssnuusseeeseescesssssunnussesseseeesssssssunussseseseeseesssssnuusesseeseeseesssssssnussseeseeeeesnnsss 8 24 BUILT IN DISPLAY BUTTONS for pCO or pCO 5 AND PGDO F ntn ttt ttti ttti ttistetctistts 10 3 Starting the unt 11 3 1 Selecting the language for displaying the screens M 32 First Start up Lotto iota A1 33 Updating the software AN 34 Basic configuration 12 35 EZ viet Gu ele Eer 13 4 PLAN eege 14 4 1 Termitial se In PLAN Geste or o fs
98. sponding to the standard compressor pack at the moment the alarm occurred e chronological number of the event 0 to 150 time date alarm test suction pressure supply pressure The chronological event number indicates the seniority of the event with respect to the 150 available storage slots The alarm number 001 is the first event after the BASIC log was enabled and consequently the oldest If you move the cursor onto the chronological number you can run through the alarm log from 0 to 150 using the arrow keys If for example 15 alarms are saved from position 001 pressing the down arrow has no effect If 15 alarms have been saved in position 015 pressing the up arrow has no effect Cod 030221991 rel 2 6 01 04 09 33 Standard compressor packs 10 The supervisor network The pCO sistema controllers can be connected to the most common supervisory systems using suitable interface cards and protocols In this application program the following data is exchanged with the supervisor e he status of the inputs outputs e Alarms present and active e Alarms present and active alarms e Enabling of devices various managements etc Moreover it is possible to modify an entire set of parameters such as setpoint differentials times unit status reset alarms etc Also see the chapter Supervisor communication variables 10 1 Serial cards For connection to supervisor systems the pCO is designed to support the
99. stop Key R R Compressor call Cmp Compressor Tis TMinOff Minimum OFF time T Maximum compressor off time Pm Cmp lt gt TN TMinOff Fig 5 6 Minimum time between starts of different compressors proportional band Manufacturer branch general parameters screen T3 This represents the minimum time that must elapse between when one device starts and the next This parameter allows simultaneous starts to be avoided Key R R Compressor call Cmp1 Compressor 1 Cmp2 Compressor 2 Ts TDiffSw Minimum time between starts of different compressors T Maximum compressor off time Pm Cmp1 TDiffSw Fig 5 7 Minimum time between power ups of same compressor Manufacturer branch general parameters screen T4 Sets the minimum time that must elapse between two starts of the same device This parameter limits the number of starts per hour If for example the maximum allowable number of starts per hour is 10 to guarantee this limit simply set a value of 360 seconds Key R R Compressor call Cmp Compressor TSameSw Minimum time between power ups of same compressor T s S j T Maximum compressor off time Pm Cmp amp gt Ths TSameSw Fig 5 8 Time min between same compressor under inverter Branch costructor time mask TB Determine the minimum time that elapse between two start of the same compressor under inverter Allow of limit the number of start up every hour Minimum time
100. sure switch input 6 Input for ON OFF from digital input 7 Input for setpoint variation from digital input H Alarm relay 9 Auxiliary pump Key to the table Cmp Compressors P Load steps Fan Fans Board Type of board recommended in brackets is the recommended number of inputs per compressor Free inputs Inputs still available for the type of board Outputs used Number of relays used The table below shows the most suitable board based on the devices configured Cmp P Fan Board Ben A Cmp P Fan Board Beg ZS inputs used inputs used 0 0 0 pCO 3 6 0 1 15 LARGE 3 4 17 0 0 1 pCO 3 5 1 1 16 LARGE 3 3 18 0 0 2 pCO 3 4 2 2 0 pCO 3 3 3 0 0 3 pCO 3 3 3 2 pCO 3 2 4 0 0 4 pCO 3 2 4 2 2 pCO 3 1 5 0 0 5 pCO 3 1 5 2 3 SMALL 3 2 6 0 0 6 SMALL 3 2 6 2 4 SMALL 3 1 7 0 0 7 SMALL 3 1 7 2 5 SMALL 3 0 8 0 0 8 SMALL 3 0 8 2 6 MEDIUM 3 7 9 0 0 9 MEDIUM 3 7 9 2 7 MEDIUM 3 6 10 0 0 10 MEDIUM 3 6 10 2 8 MEDIUM 3 5 11 0 0 11 MEDIUM 3 5 11 2 9 MEDIUM 3 4 12 0 0 12 MEDIUM 3 4 12 2 10 MEDIUM 3 3 13 0 0 13 MEDIUM 3 3 13 2 11 LARGE 3 8 14 0 0 14 LARGE 3 8 14 2 12 LARGE 3 7 15 0 0 15 LARGE 3 7 15 2 1
101. t 17 Klixon thermal overload fan 4 ID18 Digital input 18 Klixon thermal overload fan 3 Table 13 15 ormally open contact relay no 1 ormally open contact relay no 2 Load step 1 compressor 1 ormally open contact relay no 3 Compressor 2 ormally open contact relay no 4 Load step 1 compressor 2 ormally open contact relay no 5 Compressor 3 ormally open contact relay no 6 Load step 1 compressor 3 ormally open contact relay no 7 Compressor 4 ormally open contact relay no 8 Load step 1 compressor 4 ormally open contact relay no 9 Compressor 5 ormally open contact relay no 10 Load step 1 compressor 5 ormally open contact relay no 14 ormally open contact relay no 15 ormally open contact relay no 16 ormally open contact relay no 17 N018 ormally open contact relay no 18 Fan 1 Table 13 16 Cod 4 030221991 rel 2 6 01 04 09 53 Standard compressor packs 15 Possible configurations Number of inputs and outputs available for the type of board used Type of board Number of digital inputs Number of digital outputs pco 6 5 pCO pCO SMALL 8 8 pCO pCO MEDIUM 14 13 pCO LARGE 18 4 analogue inputs selected as ON OFF 18 Table 14 1 The table does not include 1 Liquid level input 2 Common oil differential input 3 Common fan thermal overload input 4 Discharge pressure switch input 5 Suction pres
102. ter a new maintenance password 15 button terminal INPUT OUTPUT button 6 button terminal PROG button and INPUT OUTPUT in the menu Probes inputs R 1 Status of the suction and discharge probes bar C Screen Cc and Press Suction F Cd Press Discharge Probes input R 2 Status of room temperature and outside temperature auxiliary probe C 40T120 C Room temp Outside temp Probes input R 2 Status of auxiliary probe for detecting gas leak ppM screen Cg gas leak Probes input R In Status of real intake temperature auxiliary probe E 40T120 C Intake time Superheat is calculated between saturated temperature converted Superheat from pressure and intake temperature Probes input R In Status of generic gas auxiliary probe the name depends on the Ce SE 40T120 C Gen Probe screen B3 probe input Electrical R I3 Displays probe B3 instant power consumption if enabled kW Screen absorpt instant value Cf Inverter R H Fan inverter status 0 1000 1 Fans Compressor inverter status 2 Compressors Digitals outputs R 19 a le Status of digital outputs 1 to 18 0 open K1 k2 k18 C closed Inputs config R If Status of analogue inputs used as digital b4 b5 b6 0 open B4 b5 b6 C closed Inputs config R Iglh Il Status of digital inputs ID1 ID2 ID18 0 open ID1 ID2 1D18 C closed Config inputs b9 b10 R Im Status of analogue inputs use
103. ter can be seen only if enabled Card pos Common fan thermal overload Positi on of the common fan thermal overload on the card Parameter can be seen only if enabled Card pos Setpoint change Positi on of the digital input for setpoint change on the card Parameter can be seen only if enabled Posi noon P ion of the room temperature probe on the card be disabled Positi of the external temperature probe on the card be disabled of the general temperature probe on the card he suction temperature probe on the card be disabled he gas leak probe on the card be disabled Power consumpt POSITION OF OUTPUTS 0 f 0 f probe disabled f o f 0 f he power consumption probe on the card obe disabled Comp 1 2 12 relay no Positi on of compressor 1 2 6 digital outputs on the card Load step1 relay no Positi card on of load step 1 of compressor 1 2 6 digital outputs on the 13 8 Load step2 relay no Positi card on of load step 2 of compressor 1 2 6 digital outputs on the 13 8 Load step3 relay no Positi card on of load step 3 of compressor 1 2 6 digital outputs on the 13 8 Card pos Fan 1 2 6 relay no Positi on of fan 1 2 0 16 digital outputs on the card 13 8 Card pos Alarm relay no Positi
104. the compressors are turned off one after the other The last one to turn off will be No 1 The speed the inverter output changes depends on the inverter ramp time parameter screen S6 setpoint branch InPress DOnZ Key InPress Suction pressure B B Setpoint differential SP Suction setpoint SP 1 j mE i 1 e DOnZ Activation zone i og i 1 DOffz Deactivation zone Inverter A i of MEE e NZ Dead zone M i H i i i i i i H T Maximum compressor off 1 1 H 1 1 1 1 1 1 i s X 10 V 2 AAT SEENEN EE HEET HEET DEE eg time Pm i H Inverter Inverter status i i NCmp Number of compressors on A i i NE P og Tis NCmp i jo ME i 4 pono H NE 3 r i 2 4 4 4 1 U Tis Cod 030221991 rel 2 6 01 04 09 18 Standard compressor packs 6 1 5 Proportional band control This control requires an offset to be set for the control of the inverter screen 6 to be added to the setpoint SP and an RBI inverter ramp differential screen 9 If the value read by the suction probe is less than or equal to the AC offset point suction setpoint the inverter output will be 0 The inverter will have a value proportional to the value of the suction probe between point A and point C setpoint differential If the value measured by the suction probe is greater than or equal to point C the inverter will be at
105. to and received from GSM telephones In fact using a GSM modem the pCO boards send an SMS message to the selected telephone in the event of alarms and can receive messages from the telephone at any time The user can modify all the read write parameters available to the supervisor see the table of Supervisor variables Setting the GSM Modem protocol in screen V1 enables screens Ai B3 B4 and a parameter in screen B2 to send a test SMS In screen Ai the status of the GSM modem can be checked and the quality of reception from the GSM network as a percentage Screen B3 is used to set the number of the GSM cellular phone to send the text message to and the password for remote supervisors or receiving SMS In screen B4 the user can customise the SMS message sent On each event alarm an SMS is sent to the cellular phone number set in screen B3 containing The name of the application A short message that can be customised by the user Alarm text Time Date Chronological number of the event 0 to 150 Suction pressure Supply pressure For the syntax of the SMS message sent to the pCO and the use of the above table refer to the manual GSM modem protocol for pCO2 code 030220330 N B When the GSM protocol is active no calls can be made from the remote supervisor to the pCO board Cod 030221991 rel 2 6 01 04 09 34 Standard compressor packs Receiving an SMS from a GSM phone An SMS can be sent from a GSM phone to the p
106. turer branch general parameters screen Gc The rotation of the fans is aimed at balancing the number of operating hours and starts of the different fans Rotation automatically excludes any fans with active alarms If a fan is stopped due to an alarm another will be immediately started so as to provide the required capacity Two different types of rotation can be set no rotation or FIFO rotation Cod 030221991 rel 2 6 01 04 09 24 Standard compressor packs No Rotation The first fan to start will be the last to stop e Power up Fan Fan2 Fan Fand e Power down Fand Fan Fan Fan FIFO rotation The first fan that to start will be the first to stop This behaviour may cause in the initial phases of operation large differences between the operating hours of the various fans however over time the values will tend to equal out e Power up Fant Fan2 Fan Fand e Power down Fan Fan Fan3 Fand 7 1 5 Various fan parameters Fan control Manufacturer branch general parameters screen Gc It can be either the dead zone see paragraph 4 2 Dead Zone or proportional band see paragraph 4 1 Proportional Band control Proportional plus integral control Manufacturer branch general parameters screen G6 Parameter visible only if the proportional band is enabled Both Proportional control only or Proportional Integral is available see the paragraph Proportional and Integral control PI CutOFF Branch constructor t
107. user can move around the screens using the buttons on the terminal described as follows if the cursor is positioned in the top left corner Home you can press the UP DOWN keys to call up the l following screens associated with the selected loop Home now if a screen includes fields for setting the values pressing the ENTER button moves the cursor to these NET fields TOR i Row3 Once having reached the field for setting the desired value the value can be modified within the set limits by pressing the UP DOWN buttons Having set the desired value to save it press the ENTER button again 2 3 15 key PCOT PCOI OR PGD I external terminal Layout of the buttons on the pCO external terminal Cod 030221991 rel 2 6 01 04 09 8 How to use the keys on the external terminal Standard compressor packs Button Function Description MENU MAINTENANCE PRINTER INPUTS AND OUTPUTS CLOCK SETPOINT prog PROGRAM MENU PROG OOOO O RED BLUE NR Pressed in all loops except for the Constructor loop it returns to main screen in the Menu branch MO If pressed in the Constructor loops you return to the screen selected by the constructor the Goe The Menu branch displays the status of the unit and the reading of the control probes s to the first screen in the maintenance branch A0 maintenance branch is used to check the status of the devices the status of the modem to carry
108. will switch the devices on according to the start up logic configured and the availability of the devices Key DOffZ Device deactivation zone DOnZ Device activation zone NZ Dead zone DZN Dead zone differential RP Suction pressure read SP Set point Fig 4 3 5 12 Compressor dead zone with variable times The time between calls varies depending on how far the pressure deviates from the dead zone In particular the activation deactivation time of the outputs decreases as the distance from the dead zone increases To set this function the following parameters must be configured e Maximum compressor on time PL e Minimum compressor on time PL e Pressure differential within which the time varies Pn e Maximum compressor off time Pm e Minimum compressor off time Pm le DTNZ e RBM DTNZ gt TOffMin D C InPress bar Fig 4 4 Key InPress Suction pressure DTNZ Differential within which the time varies SP Control set point S2 TOnMax Maximum compressor on time PL RBM Control band S8 TOnMin Minimum compressor on time PL NZ Dead zone TOffMax Maximum compressor off time Pm DOnZ Device activation zone TOffMin Minimum compressor off time Pm DOffZ Device deactivation zone In the activation phase the following cases are possible 1 Pressure equal to point B same call time as TOnMax 2 Pressure between point B and point C call time between TOnMax and TOnMin 3 Pressu
109. with active alarms or waiting for times If a compressor is stopped due to an alarm or disabling signal another will be immediately started so as to provide the required capacity Three different types of rotation can be set LIFO rotation The first compressor to start will be the last to stop e Power up C1 C2 C3 C4 C5 C6 C8 e Power down C8 C7 C6 C5 C4 C3 C1 FIFO rotation The first compressor to start will be the first to stop This behaviour may lead at the initial stage to considerable differences in the operating hours of the compressors however the hours are very similar to each other in steady state e Power up C1 C2 C3 C4 C5 C8 e Power down C1 C2 C3 C4 C5 C8 Timed rotation The compressor with the lowest number of operating hours will be started Vice versa when stopping that is the compressor with the highest number operating hours is stopped Cod 030221991 rel 2 6 01 04 09 19 Standard compressor packs 6 1 8 Type of proportional compressor control Manufacturer branch general parameters screen G6 Parameter visible only if the proportional band is enabled Control may be proportional or proportional integral See the paragraph on Proportional and Integral control PI 4 1 1 6 1 9 Number of compressors forced on with probe 1 fault Manufacturer branch general parameters screen Gb In the event of a suction probe fault or not connected alarm this parameter indicates the numbe

Carel Application software for pCO1, pCO2, pCO3, pCOxs Standard

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