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Chiller VLS-VLH-VLC-AH106

1. After you have selected the desired value press the ENTER key again to store it VLS VLH VLC 10 06 2 3 2 ALARMS EI ITELCO INDUSTRY Code Alarm unit description Comp Ventil Pump _ Aut Man Delay Notes Status Status Status Reset ALOO Automatic alarm on on on Aut 0 ALO Efficiency alarm CPS Of Of Off Man 30 sec ALO2 Flow meter alarm Off Off Off Man Parameter ALO3 Sys 1 High pressure manual reset Off Sys 1 Run Run Man No ALO4 Sys 2 High pressure manual reset Off Sys 2 Run Run Man No ALO7 Failure of sensor B3 Sys 1 DPI Run Max Run Auto 10 sec ALO8 Failure of sensor B4 Sys 2 DP2 Run Max Run Auto 10 sec ALO9 Failure of sensor B5 Tair Run Max Run Auto 10 sec AL10 Failure of sensor B6 T LAN Off Off Run Auto 10 sec AL11 Failure of sensor B7 Tin Off Off Run Auto 10 sec AL 12 Failure of sensor B8 Tout Off Off Run Auto 10 sec AL13 Failure of sensor B1 Tcoill Run Run Run Auto 10 sec defrost every 40 ALIA Failure of sensor B2 Tcoil2 Run Run Run Auto 10 sec defrost every 40 AL15 Failure of sensor B3 TANDEM 1 Run Max Run Auto 10 sec AL16 Failure of sensor B4 TANDEM 2 Run Max Run Auto 10 sec AL17 Maintenance of compressor 1 Run Run Run Man No AL18 Maintenance of compressor 2 Run Run Run Man No AL19 Maintenance of compressor 3 Run Run Run Man No AL20 Maintenance of compressor 4 Run Run
2. C ITELCO INDUSTRY 12 CONDENSER FAN CONTROL HEATING MODE IN STEP Z E K z Q 3 Z w gt a LOW Default HIGH Default ON STP1 STEP2 Odd fans 15 C Peer fans 20 C Peer Odd fans 30 C 21 VLS VLH VLC 10 06 ITELCO INDUSTRY 12 NIGHT MANAGEMENT OR LOW NOISE OPTION The parameter is defined at the Service level Night Mode If set to SI the DPSET is modified as follows DPSET night DPSET DPOFFSET from PM hours to AM hours Where DPOFFSET parameter in bars at Service Level It is the correction of the pressure target of the conden sation control with speed controller PM and AM parameters that can be set with a mask with the CLOCK key if enabled PM night mode start AM night mode end MAX FAN SPEED IN COOLING IN NIGHT MODE MaxFanSpeed is no longer a fixed parameter but is a function of B4 air temperature MAX FAN SPEED IN COOLING MODE MAX FAN SPEED MAX FAN SPEEC AV Where Tmax parameter 20 50 C AV parameter 0 5 5 Volt The analogue output value AO is always between the Min Fan Speed and the Max Fan Speed Whenever one of the two high pressure measures by the transducer rea 14 COMPRESSORS CAPACITY CONTROL Parameters used Disch Pressure Limit HI Max Disch Pressure MDP If high pressure transducer are installed and if the unit is a 4 compressors unit the compressors capacity control is active If at
3. 20 10 Outlet 15 20 Proportional Band Return 1 10 Neutral Band Outlet 1 6 Language selection ITA ENG GER SPA FRA ITA Where mCS min cold limit for the setpoint see At this level you can select the language of operation Service level English or Italian SET key French German and Spanish are Where MHS max heat limit for the setpoint see available with other eproms Service level 2 3 9 SERVICE LEVEL Press the Prg key correct password 1234 to access the Service Level When the machine is turned on every single circuit is activated through the SYSTEM ON OFF parameters Parameters Type Min Value Max Value Default Min time stop compressor Sec 10 600 90 Min running time compressor Sec 10 180 90 Time betw On same compr Sec 10 999 450 Loading time Between comp Sec 10 999 20 LWT Unloading time compressor Sec 10 999 20 ChillerNet Flag N NO Y YES N Water temperature control mode Flag Ge S LWT RWT P RWT Pl Sec 0 999 600 LWT Stop Comp Cooling C 20 20 4 5 Heating K 20 60 55 Heat set comp Flag N NO Y YES N Set point K 999 9 999 9 5 0 Diff C 999 9 999 9 10 0 Max C 999 9 999 9 5 0 9 VLS VLH VLC 10 06 ITELCO INDUSTRY Parameters Type Min Value Max Value Defaul
4. 37 Night mode hour start Read Write Integer 38 Night mode minute start Read Write Integer 39 Night mode stop hour Read Write Integer 40 Night mode stop minute Read Write Integer 41 DELTA V cooling night mode Read Write Integer 42 DELTA V heating night mode Read Write Integer 30 VLS VLH VLC 10 06 ITELCO INDUSTRY Index Meaning Read Write Type Water inlet temperature RWT Read Analog 2 Outlet water temperature circuit 1 LWT Read Analog 3 Outlet water temperature circuit 2 LWT Read Analog 4 Outdoor air temperature OAT Read Analog 5 Defrost temperature Low pressure transducer circuit 1 Read Analog 6 Defrost temperature Low pressure transducer circuit 2 Read Analog 7 High pressure transducer circuit 1 Read Analog 8 High pressure transducer circuit 2 Read Analog 9 Regulated temperature Read Analog 10 Inverter speed Read Analog 11 Soglia freddo stop compressore LWT Read Write Analog 12 Soglia caldo stop compressore LWT Read Write Analog 13 Antifreezing set point Read Write Analog 14 Antifreezing differential Read Write Analog 15 Antifreezing electric heater set point Read Write Analog 16 Antifreezing electric heater differential Read Write Analog Analog 17 Inverter set point Read Write Analog 18 Inverter minimum speed Read Write Analog 19 Inverter maximum speed Read Write Analog 20 Compressor
5. 42 Low pressure circuit 1 Read Digital 43 Low pressure circuit 2 Read Digital 28 VLS VLH VLC 10 06 ITELCO INDUSTRY Index Meaning Read Write Type 44 High pressure circuit 1 Read Digita 45 High pressure circuit 2 Read Digita 46 Thermal compressor 1 Read Digita 47 Thermal compressor 2 Read Digita 48 Thermal compressor 3 Read Digita 49 Thermal compressor 4 Read Digita 50 Fan thermal Read Digita 51 Faulty probe B1 Read Digita 52 Faulty probe B2 Read Digita 53 Faulty probe B3 Read Digita 54 Faulty probe B4 Read Digita 55 Faulty probe B5 Read Digita 56 Faulty probe Be Read Digita 57 Faulty probe B7 Read Digita 58 Faulty probe B8 Read Digita 59 Compressor Maintenance 1 Read Digita 60 Compressor Maintenance 2 Read Digita 61 Compressor Maintenance 3 Read Digita 62 Compressor Maintenance 4 Read Digita 63 Flow switch alarm Read Digita 64 Remote on off enable Read Write Digita 65 Fan 2 speed Read Digita 66 Fan inverter enable Read Write Digita 67 Night mode enable Read Write Digita 68 Chillernet enable Read Write Digita 69 Heat Cool selection Read Write Digita 29 VLS VLH VLC 10 06 ITELCO INDUSTRY Index Meaning Read Write Type 1 Sys 1 state Read Integer 2 Sys 2 state Read Integer 3 Machine state Read Inte
6. 50 HP integral time sec 0 999 70 ETS 25 90 ETS 50 HP set SH e 2 50 5 5 HP low SH C 21 4 5 DF open EEV 0 100 60 DF Proportional 0 99 9 20 DF integral time sec 0 999 60 DF set SH C 2 50 DF low SH C 21 3 SH dead band C 0 9 9 0 3 Derivation time sec 0 99 9 20 Low SH integral time sec 0 30 1 LOP integral time sec 0 25 5 0 MOP integral time sec 0 25 5 10 LOP integral time sec 0 500 60 Proportional dynamic control Y N Y Blockage control EEV sec 0 999 0 High condensation temperature alarm C 0 99 9 0 Integration time temperature condensation sec 0 25 5 0 Start Open percentage 0 100 60 Unit compressor Scroll Screw Scroll Capacity NO steeps NO STEEPS Evaporator type Cooling exchanger pipes Heat pump exchanger pipes Minimum saturation temperature Cooling C 50 90 10 Heating je 50 90 25 Defrost SG 50 90 25 Maximum saturation temperature Cooling K 50 90 15 Heating i 50 90 15 Defrost C 50 90 10 Threshold alarm high SH Ke 0 100 30 VLS VLH VLC 10 06 14 ITELCO INDUSTRY 3 CONDENSING VERSION 1 Disables the Tin and Tout B7 and B8 water probes 2 Access the manufacturer menu 4939 in the follo wing mask set up the type of unit Chiller gt Heatpump gt CONDENSING t Chiller Unit Number compressors i per circuit nn 2 Number driver 2 i CONDENSING Unit i Number compressors i per circuit 2 Number dr
7. Off Run Man AL35 Eprom failure driver 2 Run Off Man AL36 Cable motor EVV driver 1 Off On Man AL37 Cable motor EVV driver 2 On Off Man AL38 Timeout MOP driver 1 0 Auto AL39 Timeout MOP driver 2 0 Auto AL40 Timeout LOP driver 1 100 Auto ALA Timeout LOP driver 2 100 Auto AL42 Low SH driver 1 Run Run Auto AL43 Low SH driver 2 Run Run Auto AL44 Valve open driver 1 Off Run Auto AL45 Valve open driver 2 Run Off Auto AL46 High SH driver 1 Run Run Auto ALA7 High SH driver 2 Run Run Auto AL48 Sensor 1 driver 1 Off Run Auto AL49 Sensor 1 driver 2 Run Off Auto AL50 Sensor 2 driver 1 Off Run Auto ALS Sensor 2 driver 2 Run Of Auto AL52 Sensor 3 driver 1 Of Run Auto ALS Sensor 3 driver 2 Run Of Auto AL54 GaAhead driver 1 Run Run Auto AL55 GaAhead driver 2 Run Run Auto AL56 Lan driver 1 disconnected Of Run Auto AL57 Lan driver 2 disconnected Run Off Auto AL58 Auto set up driver 1 Off Run Auto AL59 Auto set up driver 2 Run Of Auto 2 3 3 Advanced alarm history file This is a special function that can be enabled by using a memory expansion board and from a list of variables that has been loaded together with the software This function will enable the user to record and display some readouts of pre established parameters at regular inter vals or to download the file on a Pc and to display the history file in the Excel format To display the advanced history file press the Alarm and Enter keys at the same time until the mask
8. Offset probe Tin 3 3 0 T out C 3 3 0 TPlan 3 3 0 T coil 1 KS 3 3 0 T coil 2 C 3 3 0 DPI bor 3 3 0 DP 2 bar 3 3 0 T tandem Sys 1 C 3 3 0 T tandem Sys 2 3 3 0 Maintenance Alarm threshold N Hours 0 100 10 010x1000 Reset hours Pump flag N NO Y YES N Compressors flag N NO Y YES N Disabile compressors Driver 1 Manual manAge EEV Modality flag AUTO MAN AUTO Step flag 0 2625 EEN position flag 0 2625 Driver 2 Manual manAge EEV Modality flag AUTO MAN AUTO Step flag 0 2625 EEN position flag 0 2625 Driver 1 status Nessuna anomalia Driver 2 status Nessuna anomalia Offset probe driver 1 S1 bar 0 S3 C 3 3 0 Offset probe driver 2 S1 bar 0 S3 E 0 6 ITELCO INDUSTRY 2 3 5 PRINTING KEY NO AVAILABLE 2 3 6 1 0 INPUT OUTPUT Acronym Description Tin Entering Water temperature Tout Leaving water temperature TPLAN Water temperature plant Option Tair External air temperature Tcoil 1 Sensor coil SYS 1 only HP Tcoil 2 Sensor coil SYS 2 only HP DP minore see note DP 1 Sys 1 discharge pressure transducer DP 2 Sys 2 discharge pressure transducer INVERTER FAN FAN SPEED TEMPERATURE TANDEM SYS 1 Discharge temp tandem sys TEMPERATURE TANDEM SYS 2 Discharge temp tandem sys2 DIGITAL INPUT Input del pCO1 DIGITAL INPUT EXPANSION Input expansion DIGITAL OUPUT ANALOG OUTPUT FAN INVERTER 0 10V to the FSC Thr
9. Repeat the procedure intended to address the terminal by assigning 32 as an address Press Enter Type the pCO1 address you have just set and press Enter Terminal config Press ENTER i to continue In the following mask please confirm address 32 once again and define it as PR In the other fields set NONE and press ENTER until you are required to save the setup Select YES and press Enter Check the addresses and press ENTER P O1 ADR Priv Shared i Trml 32 Pr Trm2 None Trm3 None Ok Yes VLS VLH VLC 10 06 ITELCO INDUSTRY 5 COMPRESSORS LEAVING LIQUID CONTROL COOLING MODE If Leaving Control mode is selected the leaving mixed water temperature LWT will be controlled between the setpoint and the setpoint Neutral Band The SetPoint High Limit is the Setpoint plus the Neutral Band The SetPoint Low Limit is the Setpoint If the mixed leaving water temperature LWT is above the SetPoint High Limit the compressors will be ener gized one by one separated by the Time between Start and Start different compressors SETPOINT UNLOADING 6 COMPRESSORS LEAVING LIQUID CONTROL HEATING MODE If Leaving Control mode is selected the leaving mixed water temperature LWT will be controlled between the setpoint and the setpoint Neutral Band The SetPoint High Limit is the Setpoint The SetPoint Low Limit is the Setpoint Neutral Band If the mixed leaving water temperature LWT is below the SetPoint L
10. Run Man No AL21 Pump maintenance alarm Of Off Off Man No AL22 Failure of clock card Run Run Run Man No AL23 Thermal switch compressor 1 Off Comp Run Run Man No AL23A Thermal switch compressor 1 Off Comp Run Run Auto 1 time auto VLS 3 time auto VLH AL24 Thermal switch compressor 2 Off Comp Run Run Man No AL24A Thermal switch compressor 2 Off Comp Run Run Auto 1 time auto VLS 3 time auto VLH AL25 Thermal switch compressor 3 Off Comp Run Run Man No AL25A Thermal switch compressor 3 Off Comp Run Run Auto 1 time auto VLS 3 time auto VLH AL26 Thermal switch compressor 4 Off Comp Run Run Man No AL26A Thermal switch compressor 4 Off Comp Run Run Auto 1 time auto VLS 3 time auto VLH AL27 Sys 1 Low pressure Off Sys 1 Run Run Man Parameter AL27A Sys 1 Low pressure Off Sys 1 Run Run Auto 3 time auto AL28 Sys 2 Low pressure Off Sys 2 Run Run Man Parameter AL28A Sys 2 Low pressure Off Sys 2 Run Run Auto 3 time auto AL29 Thermal switch fans Off Off Run Man No AL29A Thermal switch fans A Off Off Run Auto 1 time auto AL30 Sys 1 Antifreeze alarm Off Sys 1 Off Run Man No AL30A Sys 1 Antifreeze alarm Off Sys 1 Off Run Auto 1 time auto AL32 Espansion off line Run Run Run Auto No AL33 Eprom failure Off Off Off Man No VLS VLH VLC 10 06 ITELCO INDUSTRY Code Alarm driver description CIRC 1 EEV 1 CIRC 2 EEV 2 Notes Status Status AL34 Eprom failure driver 1
11. any time while the system is full loaded 2 comps VLS VLH VLC 10 06 Tmax 5 22 Tair Tmax ches the MDP Value soon the fan must run at max speed until that high pressure value falls again to the 90 of the Max High Pressure Value running the high pressure value reaches the setted Disch Pressure Limit default value 26 bar the last system com pressor loaded is soon unloaded Second compressor of the system will be allowed to run only when System High Pressure value falls below the Max Discharge Pressure default value 24 bar ITELCO INDUSTRY 15 OIL RECOVERY FUNCTION If one of the tandem System1 2 running at 50 only one compressor running more than 40 the control will force the tandem at 100 for 5 minuts If the air inlet temperature is lt of the minimum tandem temperature will be restart restart In COOLING mode the two circuit run with all the compressors for 30 after one compressor for circuit will be stop for 3 passed 3 the two compressors In HEATING mode the two circuit run with all the compressors for 30 after one compressor for circuit will be stop for 3 passed 3 the two compressors will be If the air inlet temperature is gt of the minimum tandem temperature In COOLING HEATING the two circuit with all the compressors uninterruptedly 16 PUMP CONTROL Parameters used in Pump management mask Remote logic Stand by Delay Stop Pump always s
12. cal assistance call an authorised Technical Service Center ITELCO INDUSTRY 19 VLS VLH VLC TROUBLE SHOOTING The following table details possible unit faults their probable cause and suggested remedies for any other problems not immediately recognisable and or technical assistance call an authorised Technical Service Center Faulty Probable cause Remedy ALO1 Efficiency alarm CPS Gas circuit empty Wrong compressors rotation To as the circuit To check the electrical connection AL30 Low water flow To check the pump Low pressure MANUAL RESET Gas leak High temperature water inlet Solenoid valve not open Solenoid valve not open Antifreezing Wrong pump To check the pump size MANUAL RESET Water filter dirty To clean the Fier S exchanger To clean the exchanger High circuit pressure drop To check the plant pressure drop AL30a Low water flow To check the pump Antifreezing Wrong pump To check the pump size Only with Water filter dirty To clean the iter AUTO RESET SI exchanger To clean the exchanger High circuit pressure drop To check the plant pressure drop ALO2 Water pump stop To check the pump Flow meter Water pump blocked To release the pum Pump thermal contact open To reset the thermal contact and to check the scale Flow switch blocked To release the flow switch AL27 Espansion valve broken To replace the espansion valve Sys 1 Gas circuit empty To charge the circuit To fi
13. damaged To replace the transducer Failure sensor B3 Cut cable To check the cable Transducer Water inside the transducer To check the insulation High pressure Connector loose To tighten the connector screws Circuit 1 ALO8 High pressure transducer damaged To replace the transducer Failure sensor B4 Cut cable To check the cable Transducer Water inside the transducer To check the insulation High pressure Connector loose To tighten the connector screws Circuit 2 AL17 Exceeded hours of operation compressor 1 To do maintenance Compressor 1 Maintenance AL18 Compressor 2 Maintenance Exceeded hours of operation compressor 2 To do maintenance AL19 Compressor 3 Maintenance Exceeded hours of operation compressor 3 To do maintenance AL20 Compressor 4 Maintenance Exceeded hours of operation compressor 4 To do maintenance AL21 Exceeded hours of operation pump To do maintenance Pump Maintenance AL32 To replace the clock Espansion off line Espansion faulty To insert the clock card in the support AL33 Eprom faulty To replace the program Eprom failure 27 VLS VLH VLC 10 06 ITELCO INDUSTRY 20 LIST OF ITELCO INDUSTRY APPLICATION SUPERVISOR VARIABLES FOR PCO APPLICATION CHILLER VLS VLH VLC Index Meaning Read Write Type 1 Heating operation Read
14. fan speed To reset the contact To check the gas charge To clean the coil To check the installation position To replace the transducer To check the pump To check the pump size To clean the filter To clean the exchanger To check the plant pressure drop 25 VLS VLH VLC 10 06 ITELCO INDUSTRY High pressure MANUAL RESET Low ventilation Fan thermal contact open High gas charge Coil dirty Coil obstruct Faulty high pressure transducer HEAT Low water flow Wrong pump Dirty filter ay exchanger High circuit pressure drop Faulty Probable cause Remedy ALO3 COOL Sys 2 Fan stop To check the fan To check the fan speed To reset the contact To check the gas charge To clean the coil To check the installation position To replace the transducer To check the pump To check the pump size To clean the filter To clean the exchanger To check the plant pressure drop AL23 Thermal switch compressor 1 MANUAL RESET Motor compressor faulty Compressor thermal contact open Wrong charge Wrong electrical cable connection amp phase missing To check the compressor motor To reset the thermal contact To check the gas charge To check the electrical connection to tighten the terminal block screws AL23a Thermal switch compressor 1 Motor compressor faulty Compressor thermal contact open Wrong charge To check the compressor motor To reset the thermal contact To check the g
15. maximum capacity Read Write Analog 21 Compressor minimum capacity Read Write Analog 22 High temperature heat Read Write Analog 23 Low temperature heat Read Write Analog 24 Defrost start set point Read Write Analog 25 Defrost stop set point Read Write Analog 26 Cooling set point limit Read Write Analog 27 Coolind set point maximum Read Write Analog 28 Efficiency value Read Write Analog 29 Cooling set point RWT time zone 1 Read Write Analog 30 Cooling set point RWT time zone 2 Read Write Analog 31 Cooling set point RWT time zone 3 Read Write Analog 32 Cooling set point RWT time zone 4 Read Write Analog 33 Heat set point RWT time zone 1 Read Write Analog 34 Heat set point RWT time zone 2 Read Write Analog 35 Heat set point RWT time zone 3 Read Write Analog 36 Heat set point RWT time zone 4 Read Write Analog 37 Cooling set point LWT time zone 1 Read Write Analog 38 Cooling set point LWT time zone 2 Read Write Analog 39 Cooling set point LWT time zone 3 Read Write Analog A0 Cooling set point LWT time zone 4 Read Write Analog Al Heat set point LWT time zone 1 Read Write Analog 42 Heat set point LWT time zone 2 Read Write Analog 43 Heat set point LWT time zone 3 Read Write Analog A4 Heat set point LWT time zone 4 Read Write Analog 45 Glicole Set point RWT time zone 1 Read Write Analog 31 VLS VLH VLC 10 06 ITELCO INDUSTRY Index Meaning Read Wri
16. Digital 2 Cooling operation Read Digital 3 Compressor 1 sys 1 Read Digital A Compressor 2 sys 1 Read Digital 5 Solenoide valve sys 1 Read Digital 6 Compressor 1 sys 2 Read Digital 7 Compressor 2 sys 2 Read Digital 8 Solenoide valve sys 2 Read Digital 9 Fan Read Digital 10 Heater Read Digital 11 4 way valve Read Digital 12 Alarm sys 1 Read Digital 13 Alarm sys 2 Read Digital 14 Pump Read Digital 15 RWT LWT Control temperature Read Write Digital 16 Automatic restart Read Write Digital 17 Glicole enable Read Write Digital 18 Compressors rotation enable Read Write Digital 19 Remote enable pump Read Write Digital 20 Pump down enable Read Write Digital 21 Daily zone enable Read Write Digital 22 Sys 1disable Read Write Digital 23 Sys 2 disable Read Write Digital 24 Chiller heatpump enable Read Write Digital 25 Sensor B1 enable Read Write Digital 26 Sensor B2 enable Read Digital 27 Sensor B3 enable Read Digital 28 Sensor B4 enable Read Digital 29 Sensor B5 enable Read Digital 30 Sensor B enable Read Digital 31 Sensor B7 enable Read Write Digital 32 Sensor B8 enable Read Write Digital 33 Unit on Read Digital 34 On Off by supervisor Read Write Digital 35 Compressor 1 disable Read Write Digital 36 Compressor 2 disable Read Write Digital 37 Compressor 3 disable Read Write Digital 38 Compressor 4 disable Read Write Digital 39 Alarm eff Read Digital 40 Antifreezing circuit 1 Read Digital 41 Antifreezing circuit 2 Read Digital
17. ITELCO INDUSTRY ITELCO INDUSTRY Chiller unit VLS VLH VLC RAIOA ITELCO INDUSTRY VLS VLH VLC CHILLER 4 COMPRESSORS 1 GENERAL INFORMATION 1 1 INTRODUCTION This document contains the information and the operat ing instructions for VLS VLH VLC 4 compressors amp elec tronic control This information is for the aftersales service and the production operators for the end of line testing 1 2 MAIN CHARACTERISTICS Microprocessor control User friendly keyboard Proportional and integral control of the return water temperature RWT Hysteresis control of the leaving water temperature LWT Access code to enter the Manufacturer s Level Access code to enter the Assistance Level Alarm buzzer and LED Backlighted LCD Closed loop condensing pressure control Pump Down logic start stop Rotation of the compressor operation Oil return function Night mode or Low Noise control Counting of the pump compressors hours of opera tion Display of discharge pressure values History of stored alarms option Programming of different setpoints with 4 ranges of time setpoint The following accessories can be also connected Real Time Clock Memory Card alarm history and programming of different setpoints with ranges of time Serial Communication RS485 Card to connect the Chiller Control to a BMS network Remote Display Terminal Wire Remot
18. S Pump down Enable Flag N NO Y YES Y VLS N VLH Max time Sec 5 90 10 Min cooling setpoint mCS ES 5 12 6 Max heating setpoint MHS eC 30 55 45 Efficiency value bar 0 0 3 0 0 Serial Card Flag N NO Y YES N On off remote enabled Flag N NO Y YES N Cool heat remote enabled Flag N NO Y YES N Night mode Flag N NO Y YES N DPOFFSET bar 0 8 2 Cool mode TMAX ie 20 50 30 DELTA V Volt 0 0 5 0 5 Heat mode T MIN C 20 30 2 DELTA V Volt 0 5 5 Min twin air temp Set point K 20 C 99 9 20 C Diff E 0 99 9 0 5 Set point Min T air C 20 C 99 9 00 0 Low pressure alarme managment Eph 0 1 0 5 LOL 0 0 4 Press key ENTER for reset history Press the ENTER key to erase the alarm history memory Press the key ENTER for default values Press the ENTER key to go back default value Warning Carry out this operation whenever the eprom is changed Insert the new service password 1234 Note 2 Set this parameter to FSC only if the speed controller is available otherwise set it to STEP 11 VLS VLH VLC 10 06 2 3 10 MANUFACTURER LEVEL Press the Prg key correct password 4939 to access the Manufacturer Level ITELCO INDUSTRY The parameters are available only in Italian to initialize the unit Carry out this operation whenever download new software User parameters Type Min Value Max Value Default Enter pas
19. ader between the two transducers STEP1 STEP2 G Q o zZ Q R 3 E gt a F N an zZ it LS A B LS DIFF Tair CEE LS Default Peer fans 10 C Odd fans 20 C DIFF Default Peer Odd 45 C HP Default 21 bar R410C 14 bar R134A LP Default 13 bar R410C 7 bar R134A 19 VLS VLH VLC 10 06 ITELCO INDUSTRY CONSENSER FAN CONTROL IN HEATING MODE WITH FSC Two parameters used Low Air Temp Heating and High Air Temp Heating If the Tair probe is installed fan control in heat pump mode is always based on ambient temperature and not pressure At unit startup the fans will run for 3 seconds at max speed before the compressor starts After startup the fans will run according to the following rule If Tair lt Low Air Temp Heating then AO Max Fan Speed If Low Air Temp Cooling lt Tair lt High Air Temp Cooling then AO from Max to Min with linear progression If Tair gt High Air Temp Heating then AO Min Fan Speed AO Vdc If Air Temp Probe B4 isn t installed the Analogue Output is forced to the 10 Vdc value The Fan relay is energized whenever at least one compressor is running If High pressure transducer are installed during the defrost cycle the fans will turn on at 20 Bar and run at 50 AO 5 Vdc The fans will stay on until the higher discharge pressure drops to 15 Bar and then they will turn off VLS VLH VLC 10 06 20 Air Temperature
20. as charge Thermal switch compressor 2 MANUAL RESET Compressor thermal contact open Wrong charge Wrong electrical cable connection amp phase missing Only with Wrong electrical cable connection amp phase To check the electrical connection AUTO RESET missing to tighten the terminal block screws AL24 Motor compressor faulty To check the compressor motor To reset the thermal contact To check the gas charge To check the electrical connection to tighten the terminal block screws AL24a Thermal switch compressor 2 Motor compressor faulty Compressor thermal contact open Wrong charge To check the compressor motor To reset the thermal contact To check the gas charge Thermal switch compressor 3 MANUAL RESET Compressor thermal contact open Wrong charge Wrong electrical cable connection amp phase missing Only with Wrong electrical cable connection amp phase To check the electrical connection AUTO RESET missing to tighten the terminal block screws AL25 Motor compressor faulty To check the compressor motor To reset the thermal contact To check the gas charge To check the electrical connection to tighten the terminal block screws AL25a Thermal switch compressor 3 Motor compressor faulty Compressor thermal contact open Wrong charge To check the compressor motor To reset the thermal contact To check the gas charge Thermal switch compressor 4 MANUAL RESET Compress
21. e Control Phase monitor kit 2 CONTROL OF VLS VLH VLC WITH 4 COMPRESSORS THE CHILLER CONTROL SYSTEM The VLS VLH machines with 4 scroll compressors are provided with a microprocessor card which is fully pro grammed by default for the control of a chiller of cold only type with 2 circuits 2 compressors per circuit a high pressure transducer per circuit The control system consists of VLS VLH VLC 10 06 2 1 KEYBOARD amp DISPLAY TERMINAL 2 1 1 GENERAL INFORMATION The figure shows the terminal with the front door open It is provided with a LCD 4 lines x 20 columns key board and microprocessor controlled LED s so as to allow the programming of the control parameters set point differential bands alarm thresholds and the main operations to be carried out by the user 24 2 Abs ZONE 3 2 1 2 TERMINAL amp KEY BOARD DESCRIPTION The terminal makes it possible to carry out the following operations the initial configuration of the machine the change of all the main operating parameters the display of the detected alarms and their acoustic signalling by a buzzer the display of all the measured quantities The terminal and the card are connected by a 6 way phone cable The connection of the terminal to the basic card is not essential for the normal operation of the controller ITELCO INDUSTRY Access to the display mask of the machine Prg status Utente Costr
22. eshold alarm high SH Driver 1 Cool EEV Valve position Power required EEV circuit 1 Status Driver 2 Cool EEV Valve position Power required EEV circuit 2 Status Driver 1 SH Evap temp Suction temp Circuit 1 SH value Driver 2 SH Evap temp Suction temp Driver 1 Evap pressure Evap temp Suction temp Circuit 2 SH value Drive value circuit 1 Driver 2 Evap pressure Evap temp Suction temp Drive value circuit 2 Ver Driver 1 Ver Driver 2 SOFT WARE VERSION EEV 1 SOFT WARE VERSION EEV 2 Note DP roule IF Tair lt 0 C the fan speed depend by the minimum value between DP1 DP2 IF Tair gt 0 C the fan speed depend by the maximum value between DP1 DP2 VLS VLH VLC 10 06 ITELCO INDUSTRY 2 3 7 ANALOG DIGITAL DESCRIPTION Analog input pCO1 Digital input pCO1 n Description n Description B Low pressure transducer 1 ID Remote On Off B2 Low pressure transducer 2 ID2 Cool Heat B3 High pressure transducer 1 ID3 Fan thermal BA High pressure transducer 2 ID4 Compressor thermal 1 B5 Air temperature ID5 Compressor thermal 2 B T pLAN ID Compressor thermal 3 B7 Water inlet temperature ID7 Compressor thermal 4 B8 Outlet water temperature ID8 Flow switch ID9 S
23. fault Type EVD EVD 400 PLAN EVD 400 TLAN 400 TLAN Sensor type EVD Sheat NTC P RAZ NTC gt S3 P RAZ gt S Sheat NTC P RAZ PT 1000 P NTC NTC Type valve 2625 step ALCO EX 5 ALCO EX 6 VLS 504 TO 704 ALCO EX 7 Danfoss ETS 25 AST g ALCO EX8 SPORLAN 0 5 20 TONS SPORLAN 25 30 TONS SPORLAN 50 250 TONS CAREL EV2 P VLS 804 TO 1204 CAREL EV2 A Danfoss ETS 50 AST g DANFOSS ETS 25 AST g DANFOSS ETS 50 AST g DANFOSS ETS 100 AST g Refrigerant R 22 R 744 R 717 R 600 R 290 R 410 a R 507c R 410 a R 407 c R 404 a R 134 a Conf valve Step min 0 8100 0 Step max 0 8100 0 Step closure 0 8100 0 Conf valve Extra open Y Y N Extra closing Y Y N Conf valve Amp mov mA 0 1000 0 Amp stop mA 0 1000 0 Conf valve Frequence HZ 32 501 32 Duty cycle 0 100 0 Step in stand by EEV EEV position 9 2623 S 0 100 0 Limit sensor S1 Min Bar 9 9 99 9 0 Max Bar 0 99 9 15 Delay alarms Low SH sec 0 3600 0 High SH min 0 500 0 LOP sec 0 3600 0 MOP sec 0 3600 0 Sensor sec 0 999 10 13 VLS VLH VLC 10 06 ITELCO INDUSTRY DRIVER CONFIGURATION EXPANSION VALVE Configuration type Type Min Value Max Value Default CH Proportional E 2 50 10 ETS 25 25 ETS 50 CH Integral time sec 0 999 30 ETS 25 60 ETS 50 CH SH set SS 5 CH Low SH C 21 2 HP open EEV 0 100 60 HP Proportional SC 0 99 9 20 ETS 25 10 ETS
24. ger 4 Minimum time stop Read Integer 5 Minimum time start Read Integer 6 Minimum time stop compressor Read Write Integer 7 Delay time between the compressors Read Write Integer 8 LWT Stop compressor Read Write Integer 9 Stand by time pump Read Write Integer 10 Pump delay time stop Read Write Integer 11 Delay time flow switch running Read Write Integer 12 Delay time flow switch Start up Read Write Integer 13 Delay alarm low pressure Read Write Integer 14 Delay time start defrost Read Write Integer 15 Max time defrost Read Write Integer 16 Delay time stop compressor during defrost Read Write Integer 17 Pump down maximum time Read Write Integer 18 Time zone hour 1 Read Write Integer 19 Time zone hour 2 Read Write Integer 20 Time zone hour 3 Read Write Integer 21 Time zone minute 1 Read Write Integer 22 Time zone minute 2 Read Write Integer 23 Time zone minute 3 Read Write Integer 24 25 Pump hours segment 1 Read Write Integer 26 Pump hours segment 2 Read Write Integer 27 Compressor 1 segment 1 Read Write Integer 28 Compressor 1 segment 2 Read Write Integer 29 Compressor 2 segment 1 Read Write Integer 30 Compressor 2 segment 2 Read Write Integer 31 Compressor 3 segment 1 Read Write Integer 32 Compressor 3 segment 2 Read Write Integer 33 Compressor 4 segment 1 Read Write Integer 34 Compressor 4 segment 2 Read Write Integer 35 Fan start delay Read Write Integer 36 Integration time regulation P l Read Write Integer
25. iver 2 4 COPY FROM A PROGRAMMING KEY TO PCO The programming key will enable the operator to copy an application programme from a pCOI or to a pCO1 with all the values setup at the time of copying To copy an application programme from or to a key Disconnect the machine Connect the pCO1 key with the board by means of a jack Supply the machine and wait for the arrow symbols to stop blinking Press the MODE key on the key to decide whether the application programme must be copied on the pCO1 board arrow up on or on the key arrow down on and press the START key Wait for the process to come to an end which will be signalled by a 2 second intermittent sound 15 Procedure after Picol change 1 Check if address board is already fitted on pCO board if not add it look at clock labelled socket on pCO and set only dipl to ON 2 Check if terminal display is addressed with dip1 2 3 4 ON 3 Replace the eprom with a new one 4 Power on the control pressing in the same time both arrow keys and enter until Display address i Setting see OO LO Board address Power off the machine Press the keys Alarm and arrow up at the same time and hold them down Power on the machine Hold the keys down until the pCO1 addressing mask appears Set the address to a value from 1 to 8 i PLAN address 1 r UP increase DOWN decrease i ENTER save amp exit Power off the machine
26. nd and repair the leak To check the plant thermal load To check the electrical connection To check Pump Down setting Low pressure MANUAL RESET Gas leak High temperature water inlet Solenoid valve not open Solenoid valve not open AL27a Espansion valve broken To replace the espansion valve Sys 1 Gas circuit empty To charge the circuit Low pressure Gas leak To find and repair the leak Only with High temperature water inlet To check the plant thermal load AUTO RESET Solenoid valve not open To check the electrical connection AL28 Espansion valve broken To replace the espansion valve Sys 2 Gas circuit empty To charge the circuit To find and repair the leak To check the plant thermal load To check the electrical connection To check Pump Down setting High pressure MANUAL RESET Low ventilation Fan thermal contact open High gas charge Coil dirty Coil obstruct Faulty high pressure transducer HEAT Low water flow Wrong pump Dirty filter ay exchanger High circuit pressure drop AL28a Espansion valve broken To replace the espansion valve Sys 2 Gas circuit empty To charge the circuit Low pressure Gas leak To find and repair the leak Only with High temperature water inlet To check the plant thermal load AUTO RESET Solenoid valve not open To check the electrical connection Solenoid valve not open To check Pump Down setting ALO2 COOL Sys 1 Fan stop To check the fan To check the
27. of the advanced history file appears gt SYSTEM INFORMATION i LOG DATA OTHER INFORMATION Select the Log Data item and press Enter to confirm The following mask will require you to select the type of memory you wish to access i e the internal one or the additional one The additional memory is selected by default Then press Enter DISPLAY LOG DATA Which memory EXPANSION MEMORY Here below select the Log file you wish to display since you can have more than one Log file on the same expansion memory DISPLAY LOG DAT Which Log After having selected the Log file you wish the follow ing mask will require you to select the record you wish to display The latest record will be displayed by default but you can select an earlier record by using the arrow keys and by pressing the Enter key to con firm 3 06 06 06 15 50 16 Up next record DOWN prev record ENTER view data VLS VLH VLC 10 06 2 3 4 MAINTENANCE LEVEL Press the Prg key to access the Maintenance masks ITELCO INDUSTRY VLS VLH VLC 10 06 Parameter Type Min Value Max Value Default N 0000 AL 000 h 00 00 00 00 00 Setpoint 00 0 C RWT 00 0 C SYS 1 comp 1 000000 h SYS 1 comp 2 000000 h SYS 2 comp 1 000000 h SYS 2 comp 2 000000 h Pump 000000 h Insert the password 0000
28. or thermal contact open Wrong charge Wrong electrical cable connection amp phase missing Only with Wrong electrical cable connection amp phase To check the electrical connection AUTO RESET missing to tighten the terminal block screws AL26 Motor compressor faulty To check the compressor motor To reset the thermal contact To check the gas charge To check the electrical connection to tighten the terminal block screws AL26a Thermal switch compressor 4 Motor compressor faulty Compressor thermal contact open Wrong charge To check the compressor motor To reset the thermal contact To check the gas charge VLS VLH VLC 10 06 Wrong electrical cable connection amp phase missing 26 Only with Wrong electrical cable connection amp phase To check the electrical connection AUTO RESET missing to tighten the terminal block screws AL29 Fan stop To check the motor Thermal switch fans Fan thermal contact open To reset the thermal contact and to check MANUAL RESET the scale Fan blocked To release the fan To check the electrical connection to tighten the terminal block screws ITELCO INDUSTRY Faulty Probable cause Remedy AL29a Fan stop To check the motor Thermal switch fans Fan thermal contact open To reset the thermal contact and to check Only with the scale AUTO RESET Fan blocked To release the fan Wrong electrical cable connection amp phase To check the electrical connec
29. ow Limit the compressors will be energized one by one separated by the Time between Start and Start different compressors SETPOINT NEUTRAL BAND VLS VLH VLC 10 06 NO ACTIONS ZONE NO ACTIONS ZONE If the LWT falls below the SetPoint High Limit and grea ter than the SetPoint Low Limit temp is in the Neutral Band No actions is occurring No load and no unload ing If the LWT falls below the SetPoint one compressor is switched off Until the LWT is below the Setpoint com pressors are unloaded according to the Unload time parameter value SETPOINT NEUTRAL BAND LWT LEAVING WATER TEMPERATURE If the LWT is between the SetPoint Low Limit and the SetPoint High Limit temp is in the Neutral Band No actions is occurring No load and no unloading If the LWT is above the SetPoint High Limit one compres sor is switched off Until the LWT is above the Setpoint High Limit compressors are unloaded according to the Unload time parameter value SETPOINT UNLOADING LWT LEAVING WATER TEMPERATURE ITELCO INDUSTRY 7 COMPRESSORS RETURN LIQUID CONTROL COOLING MODE If Return Control Mode is selected the return water tem If the RWT is above the Sepoint control starts to load perature RWT is controlled between the Setpoint and each stages The higher is the RWT the more compres the Setpoint Proportional Band We call this zone the sors will be loaded according to the compressor activi Loading Zone t
30. r values fall below the Defrost start Evap press a timer starts The timer is increas ed while the EP value is under the Defrost start value When the timer t1 2 3 reaches the defrost start time value the defrost cycle starts for both system During defrost cycle fans are stopped all compressors run if one or more are in off they must be powered reverse valve is powered During defrost Tcoil increases There are two coils temp sensor one each coil When one of the coil reaches a set ted limit then this tandem is part loaded to 50 but unit is still in defrost When also second coil temp reaches the limit then defrost cycle ends VLS VLH VLC 10 06 24 During defrost cycle if the discharge pressure in one of the two systems reaches an high dangerous value fans must run at max speed So if discharge pressure trans ducer are attached if one of the two high pressure val ues reaches the Max Discharge Pressure value see MDP the fans contactor is energized and the analogue output is forced to 5Vdc Defrost cycle stops when both the Tcoil values rises up to the Defrost Stop Temp value anyway if the Defrost Max Time has elapsed When defrost cycle is ended the reverse valve is unpo wered and fans are powered again according to fans rule logic The following table details possible unit faults their pro bable cause and suggested remedies for any other problems not immediately recognisable and or techni
31. sword Manifactured 0000 0 9999 4939 Exact password Unit Flag Chiller VIS Chiller Heat pump VLH Heat pump RE Condensing unit VLC Condensing unit circuit LWT sensor Log N 2 2 Driver number N 2 2 Expansion enable Flag N NO Y YES Y YES Enable sensor B1 N B2 N B3 Y B4 Y B5 Y B N B7 Y B8 Y Expansion Enable sensor B1 Y B2 Y B3 N B4 N Sensor air NTC pt 1000 PTC NTC Sensor water in NTC pt 1000 PTC NTC Sensor water out NTC pt 1000 PTC NTC Sensor defrost 1 2 NTC pt 1000 PTC NTC Analog inputs Range 0 5 V High pressure DP Start O Bar End 45 Bar Liquid solenoid valve Flag N NO Y YES N Cycle rev valve Flag NA NC NA Hour autoreset numbers LP 1 alarm N 0 99 3 LP 2 alarm N 0 99 3 Term comp 1 N 0 99 1 VLS VLC 3 VIH Term comp 2 N 0 99 1 VLS VLC 3 VIH Term comp 3 N 0 99 1 VLS VLC 3 VIH Term comp 4 N 0 99 1 VLS VLC 3 VIH Term fan N 0 99 1 Antifreezing N 0 99 0 T air range Transduce type 0 diff 0 Klixon reset tandem discharge time SYS 1 min 0 99 3 SYS 2 min 0 99 3 Gas Type R410c Only Cooling version Max TIN threshold SE 0 99 25 diff 0 99 Push the ENTER key to the driver configuration Push the ENTER key Warning Set the new manufacturer s password 0000 VLS VLH VLC 10 06 12 DRIVER CONFIGURATION ITELCO INDUSTRY EXPANSION VALVE Configuration type Type Min Value Max Value De
32. t Cool set comp Flag N NO Y YES N Set point C 999 9 999 9 24 0 Diff S 999 9 999 9 10 0 Max G 999 9 999 9 2 0 Auto restart Flag N NO Y YES N Glycole Flag N NO Y YES N Enable rotation Flag N NO Y YES YES Clock 32 Kbyte Flag N NO Y YES N Pump management aoo Flag N NO Y YES N Delay stop hour 1 24 12h Sec 0 60 20 Flowswitch Interbloc delay time alarm running Sec 0 99 Startup Sec 0 99 10 Low pressure Delay time Sec 0 99 40 Fan termal rel alarm Delay time Sec 0 10 2 Antifreeze Limit KS 15 10 A Diff C 0 99 2 Antifreeze heater Setpoint KS 15 10 Diff SS 0 99 2 R Flag STEP FSC SH note 2 Delay start fans Sec 10 10 0 LS low speed only if STEP Setpoint with peer fans 20 0 10 Setpoint with odd fans SS 20 0 20 Diff 0 99 45 LS low speed only if STEP HP bor 16 28 34 LP bar 10 16 21 DPSET only if FSC bar 10 24 28 MINDP only if FSC bar 25 18 MIN Speed only if FSC Vdc 0 10 0 MAX Speed only if FSC Vdc 0 10 10 Condensation MDP bar 18 28 37 High bar 18 28 40 Fan step heating with odd fans Low SC 0 99 15 with peer fans Low C 0 99 20 High 0 99 30 10 VLS VLH VLC 10 06 ITELCO INDUSTRY Parameters Type Min Value Max Value Default Defrost mangement Start bar 20 20 5 5 Stop C 20 20 10 Start time Min 0 99 40 Max time Min 10 5 Off tandem Sec N NO Y YE
33. tarts 30 seconds before the first compres sor is loaded and stops always a parameter Pump Delay Time value in seconds after the unit is stopped locally or by remote start stop digital input 17 PUMP DOWN LOGIC LIQUID LINE EEV CONTROL Pump Down during startup of the first compressor of each system and during stop of the last compressor of each system 23 If the parameter Pump Remote Logic is in YES if the unit is stopped by the remote Start Stop digital input the pump continues to run It only stops if the unit is locally stopped by panel Parameters used Pump Down Max Time Pump Down Enable Liquid Line Solenoid Valve Enable All the fol lowing logic is valid only if Liquid Line Valve are select ed as present in Factory Level and if Pump Down is ena ble in Service Level VLS VLH VLC 10 06 ITELCO INDUSTRY 18 DEFROST CYCLE HEAT PUMPS ONLY Defrosting of a circuit with time temperature control DEFROST LOGIC 1 EP lt LIMIT WHEN t1 t2 tn gt tmax gt DEFROST WHEN FIRST Tcoil gt Tcoil LIMIT gt CIRCUIT PART LOADED 3 WHEN SECOND CIRCUIT Tcoil gt Teoil LIMIT gt END DEFROST CYCLE Parameters used Defrost start Evap press Defrost stop temp defrost Delay time defrost Max time Reversing Off Time Moreover cycle reversion during normal operation changing from summer to winter mode or back always follow compressors switch off If one of the two Evap press senso
34. te Type 46 Glicole Set point RWT time zone 2 Read Write Analog 47 Glicole Set point RWT time zone 3 Read Write Analog 48 Glicole Set point RWT time zone 4 Read Write Analog 49 Glicole Set point LWT time zone 1 Read Write Analog 50 Glicole Set point LWT time zone 2 Read Write Analog 51 Glicole Set point LWT time zone 3 Read Write Analog 52 Glicole Set point LWT time zone 4 Read Write Analog 53 Cooling set point RWT Read Write Analog 54 Cooling set point LWT Read Write Analog 55 Heat set point RWT Read Write Analog 56 Heat set point LWT Read Write Analog 57 Glicole Set point RWT Read Write Analog 58 Glicole Set point LWT Read Write Analog 59 Band Read Write Analog 60 Dead band Read Write Analog 61 Setpoint low speed Read Write Analog 62 Differential low speed Read Write Analog 63 MINDP night mode Read Write Analog 64 DPOFFSET night mode Read Write Analog 65 TMAX night mode Read Write Analog 66 TMIN night mode Read Write Analog 67 Set point minimum air temperature tandem Read Write Analog 68 Differential minimum air temperature tandem Read Write Analog 32 VLS VLH VLC 10 06
35. tep 1 Digital output pCO1 ID10 Step 2 n Description ID11 Step 3 NO1 Compressor 1 circuit 1 ID12 Step 4 NO2 Compressor 2 circuit 1 ID13H High pressure switch 1 230V NO3 Solenoid liquid valve circuit 1 ID14H High pressure switch 2 230V NO4 Compressor 1 circuit 2 NOS Compressor 2 circuit 2 Analog output pCO1 NO6 Solenoid liquid valve circuit 2 n Description NO7 Antifreezing heater Y1 Inverter fan NO8 Reversing valve Y2 NO9 Fan step 1 Y3 NO10 Fan step 2 YA NO11 Pump NO12 Alarm circuit 1 NO13 Alarm circuit 2 Analog input t LAN pCOE Digital input PCOE t LAN Bl Defrost temperature 1 ID1 High temperature tandem 1 B2 Defrost temperature 2 ID2 High temperature tandem 2 B3 Tandem 1 discharge temperature 150 C ID3 Second Set Point selection B4 Tandem 2 discharge temperature 150 C ID4 VLS VLH VLC 10 06 2 3 8 USER LEVEL SETPOINT Press the PRG key to enter the Setpoint level which can are listed below together with the limit values and the ITELCO INDUSTRY be accessed by the user The parameters that can be set default values standard factory set up User parameters Control mode Min Value Max Value Default Sys 1 OFF ON OFF Sys 2 OFF ON OFF Unit managment Cooling Heating Cooling Setpoint Return mCS 2 20 10 Outlet mCS 20 8 Heating Setpoint Return 20 MHS 5 A0 Outlet 20 MHS 40 Glycole Setpoint Return 15
36. tion missing to tighten the terminal block screws AL11 Faulty sensor To replace the sensor Failure sensor B7 Entering water temperature Cut cable Sensor not connected Water inside the sensor To replace cable To check the electrical connection To check the insulation AL12 Failure sensor B8 Outlet water temperature Faulty sensor Cut cable Sensor not connected Water inside the sensor To replace the sensor To replace cable To check the electrical connection To check the insulation AL10 Failure sensor B6 temperature LAN Faulty sensor Cut cable Sensor not connected Water inside the sensor To replace the sensor To replace cable To check the electrical connection To check the insulation ALO9 Failure sensor B5 Outdoor air temperature Faulty sensor Cut cable Sensor not connected Water inside the sensor To replace the sensor To replace cable To check the electrical connection To check the insulation AL13 Failure sensor B1 Coil 1 temperature Faulty sensor Cut cable Sensor not connected Water inside the sensor To replace the sensor To replace cable To check the electrical connection To check the insulation AL14 Failure sensor B2 Coil 2 temperature Faulty sensor Cut cable Sensor not connected Water inside the sensor To replace the sensor To replace cable To check the electrical connection To check the insulation ALO7 High pressure transducer
37. uttore Manutenzione In Out Setpoint Versione Fasce orarie Esc key allows you to move from one mask to another Alarm key used to display the alarms to reset them in manual Press it one to display the mask of the activat ed alarm press it again to reset the alarm signal ES 8 a O ec som Esc keys Pressing these keys at the Prg Ei same time allows you to turn the unit on off Up Down keys allows you to set the control parameters values and to move ME one mask to another not back lighted Enter key used to move the cursor inside the masks and to save the values of the set para meters Alarm Enter keys Press these keys at the same time to enter the storical alarm after 1 come back at status machine menu A 2 2 DISPLAY The display is an LCD 4 lines x 20 columns The quan tities and the information about the operation of the unit are alternated in the form of subsequent screens named EE x RigaO Home Rigal Riga2 Riga3 EE 2 3 KEYBOARD 2 3 1 ARROWS KEY UP DOWN ENTER If the cursor is in the top left hand corner Home press the UP DOWN keys to access the subsequent masks associated to the selected branch If a mask includes some value setting fields and you press the ENTER key the cursor will reach these fields Once you have reached the quantity setting field you can modify any value within the expected limits by pressing the UP DOWN keys
38. wing the correlation Startup Voltage Output Voltage DC 10 7 4 1 2 5 8 11 14 17 20 23 26 29 32 35 38 Ambient Temperature C Table 1 Startup Fan Valves There is one high pressure transducer each system If only one compressor is running the fans control to its dis charge pressure If two compressors are running the fans control the pressure of the Ist system started or the one which is running at 100 capacity if the other one is run ning at lower capacity as long as neither pressure exceeds the maximum discharge pressure Once on the fan speed is recalculated every second according to the below basic rules IF DPSET 1 lt DP lt DPSET 1 then no change in AO If DPSET 1 lt DP lt DPSET 2 AND DP IS NOT DECREASING then AO AO 1 If DP gt DPSET 2 AND DP IS NOT DECREASING then AO AO 5 If DPSET 2 lt DP lt DPSET 1 AND DP IS NOT INCREASING then AO AO 1 If DPSET 2 lt DP lt 10 5 AND DP IS NOT INCREASING then AO AO 2 If DP lt MINDP then AO AO 2 To check if DP is increasing or decreasing value DDP 0 2 bar sec is used VLS VLH VLC 10 06 ITELCO INDUSTRY 10 CONDENSER FAN CONTROL COOLING MODE IN STEP The fan step control is managed by the parameters LP 1 HP 1 LS Diff The fans start under sensor air B4 control OAT During the fans running If DP gt HP1 one step is load independent by OAT value If DP lt LP1 unloaded the step DP is the le
39. y logic timer and rules described All stages 2 or 4 compressors are placed in the pro portional band dividing it in the number of the com pressors Example regulation diagram for machines with max 4 compressors RWT T Retum Water Temperature Regulation Set Point Prop Band Set Point All the unit compressors will be proportionally positioned in the band called Loading Zone 8 COMPRESSORS RETURN LIQUID CONTROL HEATING MODE The compressors are loaded in the same proportional The difference is that the loading zone is between Set way used in Return Control in Cooling Point Proportional Band and Set Point 17 VLS VLH VLC 10 06 ITELCO INDUSTRY 9 CONDENSER FAN CONTROL IN COOLING MODE WITH FAN SPEED CONTROL Parameter used Minimum Fan Speed Max Fan Speed Discharge Pressure Set DPSET Max Discharge Pressure MINDP Condensation type Control STEP or FSC Control uses one digital output to power on one fans relay and an analogue output 0 10Vdc to drive a Fan Speed Controller FSC The fans try to maintain a con stant condenser pressure equal to the programmed set point by varying fan speed As soon as the first compressor starts the fan relay will turn on and it will stay on until the all compressors turn off For the first 10 seconds the fans will begin at an out put level proportional to the ambient temperature The hotter it is out the faster the fans will start Below is a chart sho

Chiller VLS-VLH-VLC-AH106

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