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YK CENTRIFUGAL LIQUID CHILLER OptiView

1. 42 160 54 Ol GBO Thrust Bearing Safety Shutdown Messages These shutdowns must be investigated by a qualified Service Technician prior to restarting the unit to avoid severe compressor damage CAUTION JE Restart is inhibited until the clearance value is within acceptable limits and the reset procedure has been performed by the Service Technician see manual 160 54 M1 THRUST BEARING PROXIMITY PROBE CLEARANCE The clearance between the compressor high speed thrust collar and the tip of the proximity probe has increased gt 10 mils or decreased gt 25 mils for 2 continuous seconds from the reference position The minimum allowed clearance is 23 mils Therefore if the reference position is lt 47 mils the shutdown will occur when the actual clearance is lt 22 mils THRUST BEARING PROXIMITY PROBE OUT OF RANGE The clearance between the compressor high speed thrust collar and the tip of the proximity probe has decreased to lt 17 mils THRUST BEARING HIGH OIL TEMPERATURE Not applicable to units equipped with Flash Memory Card version C MLM 01 03 and higher The temperature of the oil in the high speed drain line sensed by the proximity probe has increased to gt 121 C 250 F THRUST BEARING OIL TEMPERATURE SENSOR Not applicable to units equipped with Flash Memory Card version C MLM 01 03 and higher The temperature of the oil in the high speed drain line sensed by the proximi
2. l Tumge r Lae eo er thilled Ligi A Pis L i i Tilisa Liquid Phew jeito i i iT Baturn Ole Lips Li Evaporator Foe Lo Feeperater 34 ore LEID Tmall temperature Bitte CIRM T TLELI Bet rigs Laas Bete FY FP This screen displays the slot numbers of the commonly monitored parameters 26 160 54 Ol GBO ia YORK 9 2 CUSTOM SCREEN Flash Memory Card Version C MLM 01 04 or later TETEE This screen allows up to 10 Service Technician selected parameters to be displayed for trouble shooting These parameters are selected from a list on the Custom View Setup Screen At completion of the service call the display can be cleared or the parameters can be left there for monitoring by operations personnel ul YORK 10 DISPLAY MESSAGES The SYSTEM STATUS and SYSTEM DETAILS are displayed at the top of the graphic display The SYSTEM STATUS message describes the operating state of the unit whether it is stopped running starting or shutting down The SYSTEM DETAILS displays Warning Cycling Safety Start Inhibit and other messages that provide further details of the SYSTEM STATUS messages Messages are displayed in different colours to help identify them GREEN Normal operation messages YELLOW Warning messages ORANGE Cycling Shutdown messages RED Safety Shutdown messages 10 1 SYSTEM STATUS Messages SYSTEM READY TO START The unit is shut down but will start upon receipt of a local or remote sta
3. and the pulldown demand time remaining when pulldown demand limiting is active The LOCAL MOTOR CURRENT LIMIT and PULLDOWN DEMAND LIMIT and TIME are also programmed on this screen Local Motor Current Limit Defines the maximum allowable motor current during operation as a percentage of FLA When the motor current reaches or exceeds the programmed limit the PRV are prohibited from opening or closed to reduce the motor current Pulldown Demand Limit Defines the maximum allowable motor current during pulldown demand limiting at unit startup as a percentage of FLA This value overrides the LOCAL MOTOR CURRENT LIMIT for the time specified in the motor current PULLDOWN DEMAND TIME Pulldown Demand Time Specifies the period of time that pulldown demand limiting will be active during unit startup 12 160 54 Ol GBO 7 2 SOLID STATE STARTER SCREEN inter Ui The SOLID STATE STARTER SCREEN shows the motor current as a percentage of full load amps FLA the current limit setpoint set locally refer to LOCAL MOTOR CURRENT LIMIT or remotely by an analogue signal 0 20 mA 4 20 mA 0 10 Vdc or 2 10 Vdc in the analogue remote mode or PWM signal in digital remote mode or via the ISN GPIC interface in the ISN mode details of the SSS rating and operating voltage and current per phase and the pulldown demand time remaining when pulldown demand limiting is active The LOCAL MOTOR CURRENT LIMIT and PUL
4. 20 mA 4 20 mA 0 10 Vdc or 2 10 Vdc in the analogue remote mode or PWM signal in digital remote mode or via the ISN GPIC interface in the ISN mode and the pulldown demand time remaining when pulldown demand limiting is active The screen also displays the output voltage frequency and phase current to the motor total and cumulative input Kilowatts and PRV position In addition supply kVA power factor and voltage and current total harmonic distortion are shown on models with harmonic filters The LOCAL MOTOR CURRENT LIMIT and PULLDOWN DEMAND LIMIT and TIME are also programmed on this screen Local Motor Current Limit Defines the maximum allowable motor current during operation as a percentage of FLA When the motor current reaches or exceeds the programmed limit the PRV are prohibited from opening or closed to reduce the motor current Pulldown Demand Limit Defines the maximum allowable motor current during pulldown demand limiting at unit startup as a percentage of FLA This value overrides the LOCAL MOTOR CURRENT LIMIT for the time specified in the motor current PULLDOWN DEMAND TIME Pulldown Demand Time Specifies the period of time that pulldown demand limiting will be active during unit startup VSD Details see Section 7 3 1 ACC Details Service Technicians Filter Inhibit and Filter Details Units with Harmonic Filters KWH Reset Service Technicians 14 160 54 Ol GBO ua YORK 7 3 1 VSD DET
5. 64 F to a minimum cut out of 2 2 C 36 F for water cooling applications 1 1 C 34 F with Smart Freeze enabled or 14 4 C 6 F for brine glycol applications When the programmed leaving chilled liquid temperature SETPOINT is changed the shutdown is fixed at of 2 2 C 36 F for water cooling applications 1 1 C 34 F with Smart Freeze enabled or 14 4 C 6 F for brine glycol applications for the next ten minutes The shutdown will then revert to the SETPOINT plus the OFFSET after ten minutes has elapsed Cycling Offset Restart Defines the leaving chilled liquid temperature at which the unit will restart after a LEAVING CHILLED LIQUID LOW TEMPERATURE shutdown The OFFSET above SETPOINT can be programmed between 0 C 0 F and 21 1 C 70 F to a maximum restart of 26 7 C 80 F This OFFSET can be used to reduce unit cycling by delaying the restart until the cooling load has increased dramatically ul YORK Local Motor Current Limit Defines the maximum allowable motor current during operation as a percentage of FLA When the motor current reaches or exceeds the programmed limit the PRV are prohibited from opening or closed to reduce the motor current Pulldown Demand Limit Defines the maximum allowable motor current during pulldown demand limiting at unit startup as a percentage of FLA This value overrides the LOCAL MOTOR CURRENT LIMIT for the time specified in the motor cu
6. GBO 33 10 3 2 Cycling Shutdown Messages Models with MOD B Solid State Starter LCSSS INITIALIZATION FAILED When AC Power is restored to the system after a power failure an initialisation process occurs during which the control panel attempts to establish communications through the serial communications link with the LCSSS If communications are not established within 10 consecutive attempts a CYCLING SHUTDOWN is performed and this message is displayed The control panel will attempt to establish communications until successful LCSSS SERIAL COMMUNICATIONS After communications have been successfully established in the initialisation process the control panel initiates a data transmission to the LCSSS on the serial communications link every 2 seconds After these communications have been established if the control panel does not receive a reply within 10 consecutive attempts a CYCLING SHUTDOWN is performed and this message is displayed This same CYCLING SHUTDOWN is performed along with the same message if the LCSSS does not receive a response from the control panel after 10 consecutive attempts to communicate with the control panel after initialisation has been successfully completed The control panel attempts to establish communications until successful LCSSS SHUTDOWN REQUESTING FAULT DATA The LCSSS logic trigger board has shut down the unit but the control panel has not yet received the cause of the fa
7. The COMPRESSOR SCREEN displays a cutaway view of the unit compressor showing current operating temperatures and pressures and status of the switches and solenoids Proximity Probe Calibration Service Technicians Pre Rotation Vanes Calibrate Service Technicians VSD Tuning Service Technicians Hot Gas Service Technicians Pre Rotation Vanes Control Open Close Hold and Auto Service Technicians 10 160 54 Ol GBO ia YORK 6 OIL SUMP SCREEN CUL Ll Pde i Sine OF Pica LO UB ji L E Xi REN Selenite B Pay h n ji u j al Diz ag Dos lipsea gare Kera La e The OIL SUMP SCREEN displays the unit oil sump showing current operating temperatures and pressures and status of the oil pump run signal and solenoid The screen will also provide data for the variable speed oil pump VSOP when fitted Standby Lube VSOP Service Technicians Pressure Setpoint VSOP Service Technicians Variable Speed Oil Pump Control Raise Lower Set and Auto Service Technicians ud YORK 7 MOTOR SCREENS 7 1 EM STARTER SCREEN 160 54 Ol GBO 11 LL 1i a ae in a The EM STARTER SCREEN shows the motor current as a percentage of full load amps FLA the current limit setpoint set locally refer to LOCAL MOTOR CURRENT LIMIT or remotely by an analogue signal 0 20 mA 4 20 mA 0 10 Vdc or 2 10 Vdc in the analogue remote mode or PWM signal in digital remote mode or via the ISN GPIC interface in the ISN mode
8. compressor motor supply voltage phase rotation is not correct The unit can be restarted when the phase rotation is correct and the COMPRESSOR switch is cycled to the STOP RESET O position 160 54 Ol GBO 43 10 4 2 Safety Shutdown Messages Models with Compressor Motor Variable Speed Drive These messages are generated by events that occur within the Variable Speed Drive VSD The unit can be started after manual resets are performed as detailed below Q NOTE VSD SHUTDOWN REQUESTING FAULT DATA Service and troubleshooting information is contained in manual 160 00 M1 The VSD has shut down the unit and the control panel has not yet received the cause of the fault from the VSD via the serial communications link The VSD shuts down the unit by opening the motor controller VSD Stop Contacts located on the VSD logic board and connected between TB6 16 and TB6 53 in the control panel The microprocessor board in the control panel then sends a request for the cause of the fault to the VSD logic board via the Adaptive Capacity Control ACC board over the serial link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages VSD STOP CONTACTS OPEN SEE VSD SHUTDOWN REQUESTING FAULT DATA If the microprocessor board in the control panel does not receive the cause of the fault over
9. for at least 10 minutes It is also not performed in Brine Glycol mode Flash memory card version C MLM 01 02 or later The unit can be restarted after the temperatures are within 1 7 C 3 F of one another and the COMPRESSOR switch is cycled to the STOP RESET O position CONDENSER HIGH PRESSURE CONTACTS OPEN The contacts of the electro mechanical high pressure safety device located on the condenser shell have opened because this device has detected a pressure gt 1241 kPa 180 PSIG The contacts will automatically close when the condenser pressure decreases to lt 827 5 kPa 120 PSIG The unit can be restarted after the contacts close and the COMPRESSOR switch is cycled to the STOP RESET O position ul YORK CONDENSER HIGH PRESSURE The condenser pressure as sensed by the condenser transducer has increased to gt 1241 kPa 180 PSIG The unit can be restarted after the pressure decreases to lt 827 5 kPa 120 PSIG and the COMPRESSOR switch is cycled to the STOP RESET O position CONDENSER PRESSURE TRANSDUCER OUT OF RANGE The condenser pressure transducer is indicating a pressure that is lt 47 kPa 6 8 PSIG or gt 2068 5 300 PSIG This is outside the normal operating range of the transducer This generally indicates a defective transducer The unit can be restarted after the transducer is indicating a pressure that is within range and the COMPRESSOR switch is cycled to
10. kPa 0 PSIG or gt 2172 kPa 315 PSIG This is outside the normal operating range of the transducer This generally indicates a defective transducer The unit can be started after the transducer is indicating a pressure that is within range and the COMPRESSOR switch is cycled to the STOP RESET O position OIL DIFFERENTIAL PRESSURE CALIBRATION The sump and pump oil pressure transducers indicated a differential oil pressure of gt 103 5 kPa 15 PSID during the oil pressure transducer Auto Zeroing period that begins 10 seconds into System Pre lube and lasts for 3 seconds This indicates a defective sump or pump transducer since the oil pump is not running during this eriod and the actual differential oil pressure is 0 kPa 0 PSID The transducers are sensing the same pressure during this period and their outputs should be similar The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position ana 160 54 Ol GBO 41 Models with Variable Speed Oil Pump OIL VARIABLE SPEED PUMP SETPOINT NOT ACHIEVED One of the following conditions have occurred while in System Pre lube System Run or System Coastdown The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position u The differential oil pressure was lt 214 3 KPa 35 PSID for 5 seconds during the last 10 seconds of the System Pre lube pe
11. leading zeroes as necessary must be entered If the unit is in 24 hour mode the time must be entered in the 24 hour format otherwise AM or PM must be selected for the entered time 160 54 Ol GBO 17 Clock Enabled Disabled Used to enable or disable the real time clock in order to conserve battery life The clock must be enabled during commissioning For prolonged shutdowns the clock should be disabled 12 24 Hr Used to specify the time format 12 Hour time format includes AM and PM modifiers and shows time between 1 00 and 12 59 24 Hour time format shows times between 0 00 and 23 59 Schedule see Section 8 1 1 User see Section 8 1 2 Comms see Section 8 1 3 Printer see Section 8 1 4 Sales Order see Section 8 1 5 Operations see Section 8 1 6 Diagnostics Service Technicians 8 1 1 18 160 54 Ol GBO SCHEDULE SCREEN TU e e Sir Hri lie Wren hii 3 i AM hrs amp EL aciui oe ti ill Ae alin hit j lt Sill Pe b lp ines far ope ewe Paes FY Oe kar awr La ion When programming the SCHEDULE SCREEN the Select button is used to enable the cursor arrows which are used to highlight the day and the start or stop times that are to be modified The Y Check key is used to program the Start Stop times for that day For the Start Stop schedule to function correctly each start time must have a corresponding stop time which occurs later in that day The
12. power from the VSD logic board via the ribbon cable connecting the two boards HARMONIC FILTER RUN SIGNAL When a digital run command is received at the filter logic board from the VSD logic board via the 16 position ribbon cable a 1 10 second timer is started If a redundant run command does not occur on the serial data link from the VSD logic board before the timer expires a shutdown is performed and this message is generated HARMONIC FILTER DC CURRENT TRANSFORMER 1 During initialisation with no current flowing through the DC current transformers DCCT s the DCCT output voltages are measured and compared with a pre set limit via the filter logic board If the measured values exceed the precept limits the DCCT s are presumed to be defective and this shutdown is generated HARMONIC FILTER DC CURRENT TRANSFORMER 2 See HARMONIC FILTER TRANSFORMER 1 message 277 DC CURRENT 160 54 Ol GBO 39 10 4 Safety Shutdown Messages EVAPORATOR LOW PRESSURE The evaporator pressure as sensed by the evaporator transducer has decreased to the SAFETY SHUTDOWN THRESHOLD For water cooling applications the SAFETY SHUTDOWN THRESHOLD is a fixed value For Brine Glycol cooling applications the SAFETY SHUTDOWN THRESHOLD varies according to the concentration of the Brine Glycol solution A The unit can be started after the evaporator pressure increases to the restart threshold and the COMP
13. programmed schedule for a given day can be cancelled by setting both the Start time and Stop time to 12 00AM If the start time equals the stop time with any time other than 12 00AM the unit is OFF for that day If the unit is to operate continuously through several days the stop time of Day 1 can be set to 11 59PM and the start time of Day 2 can be set to 12 00AM The unit will not stop but continue to operate until the stop of Day 2 a ul YORK Mei i Oh ed A es el TiN rel 4 A standard set of start stop times can be defined which are utilised every week Exception Start Stop combinations for any day of the week up to 6 weeks in advance are then specified At the end of each week the schedule for the next week is created by combining the standard week definition and the next defined exception week The schedule is then updated as each of the exception weeks shifts down leaving a new blank exception week in the 6th week slot ia YORK 160 54 Ol GBO 19 8 1 2 USER SCREEN The USER SCREEN is used to define User ID s and passwords for operator service personnel The Change button is used to enable the cursor arrows which are used to highlight the User ID Password or User Level that is to be modified The Y Check key is used to program the require value The Data Display Mode defines the unit system English or Metric used on the display and the System Language is selected by scrolling through
14. remote or ISN remote 160 54 Ol GBO 21 22 160 54 Ol GBO 9 HISTORY SCREEN a te EEEL IMTS n a Las Airal A u alia isai pei Tei ip These Las Tee Falk I 22 Ta DI om k ran Prem Asialla TE a The HISTORY SCREEN displays details of the last normal shutdown last safety or cycling shutdown and a chronological listing of the last 10 safety or cycling shutdowns The View Details button displays a sub screen of system parameters see below at the time of the selected shutdown id LE Ll EEE TI 1 LE 1 LE ed Vv TORS Biel oy Thihtea T FFS TOBE THTERSRATIONAL CORP anding LU aqarin r Wa The Print History button generates a report of a selected shutdown and the Print All Histories button generates a report of system data at the time of all stored shutdowns Trends see Section 9 1 Custom View see Section 9 2 BAT fia aqe Geet Tint Eta ry ul YORK 9 1 TRENDS SCREEN As many as six selected parameters can be plotted in an X Y graph format using the start and stop buttons The X Axis is scaled per the selected Data Collection Interval and displayed in a time of day or elapsed time format as selected with the X axis toggle key The Y Axis is scaled for each parameter per the selected minimum and maximum value for each parameter Analogue parameters are scaled in pressure temperature volts amps hertz or time Digital on off parameters are scal
15. the STOP RESET O position AUXILIARY SAFETY CONTACTS CLOSED The AUXILIARY SAFETY SHUTDOWN contacts connected to I O board TB4 31 have closed initiating a safety shutdown This input is a general purpose user defined safety shutdown input The unit can be started after the contacts open and the COMPRESSOR switch is cycled to the STOP RESET O position DISCHARGE HIGH TEMPERATURE The discharge temperature sensed by the discharge temperature thermistor has increased to gt 104 4 C 220 F The unit can be restarted after the temperature decreases to lt 104 4 C 220 F and the COMPRESSOR switch is cycled to the STOP RESET O position DISCHARGE LOW TEMPERATURE The discharge temperature sensed by the discharge temperature thermistor has decreased to lt 1 1 C 30 F The unit can be restarted after the temperature increases to gt 1 1 C 30 F and the COMPRESSOR switch is cycled to the STOP RESET O position OIL HIGH TEMPERATURE The oil temperature sensed by the oil temperature thermistor has increased to gt 82 2 C 180 F The unit can be restarted after the temperature decreases to lt 82 2 C 180 F and the COMPRESSOR switch is cycled to the STOP RESET O position il YORK OIL LOW DIFFERENTIAL PRESSURE The differential oil pressure decreased to lt 103 5 kPa 15 PSID while the unit was running or failed to achieve 172 5 kPa 25 PSID by
16. the three phase compressor motor supply voltage phase rotation is not correct or the line to line voltage in any phase has decreased to lt 30 of nominal The unit will automatically restart when the power line conditions are acceptable LCSSS PHASE LOSS Flash Memory Card Version C MLM 01 04 or later The LCSSS logic trigger board has detected the line to line RMS voltage in any phase has decreased to lt 30 of the lowest value of the programmed voltage range If the programmed voltage range is DISABLED a value of 60 Vac is used as the threshold The unit will automatically restart when the line voltage is gt the SHUTDOWN THRESHOLD 160 54 Ol GBO 35 10 3 3 Cycling Shutdown Messages Models with Variable Speed Drive These messages are generated by events that occur within the Variable Speed Drive VSD The unit will automatically restart when the cycling condition clears Q NOTE VSD SHUTDOWN REQUESTING FAULT DATA Service and troubleshooting information is contained in manual 160 00 M1 The VSD has shutdown the unit and the control panel has not yet received the cause of the fault from the VSD via the serial communications link The VSD shuts down the unit by opening the motor controller VSD stop contacts located on the VSD logic board and connected between TB6 16 and TB6 53 in the control panel The microprocessor board in the control panel then sends a request for the cause of the fault
17. the list of available languages and pressing the A key until another screen is selected NOTE O The selected language will not be displayed 20 160 54 Ol GBO ia YORK 8 1 3 COMMS SCREEN TOENE The COMMS SCREEN allows the unit ID to be set for ISN Network use and the printer and communications ports to be set up baud rate data bits parity and stop bits 8 1 4 PRINTER SCREEN N a Il ee The PRINTER SCREEN allows the printer type to be The Print Report button allows selection and printing of programmed and automatic printer logging to be a particular report type status report setpoints report enabled at the start time and interval defined The time schedule report or sales order report The Print All remaining to the next log report will also be displayed Histories button generates a report of system data at the time of all stored shutdowns ul YORK 8 1 5 SALES ORDER SCREEN rim G a Tel RO iniaa Har rpi Le ere PS ie Am Mitre Laja die Bare dvs Leeda Miele Mule Dern Wf asian M wari ar n Lenin ane wire Cie atte bel Nate e The SALES ORDER SCREEN displays the sales order and name plate information for the unit programmed during manufacturing and commissioning 8 1 6 OPERATIONS SCREEN bo E Te i a a The OPERATIONS SCREEN displays the run time since the last unit start and enables the control source to be selected local analogue remote digital remote modem
18. the serial link within 20 seconds it is assumed it is not available and that message is replaced with this message VSD 105 MOTOR CURRENT OVERLOAD This shutdown is generated by the VSD logic board and it indicates that a motor overload has occurred The shutdown is generated when the VSD logic board has detected that at least 1 of the 3 output phase currents has exceeded 105 of the unit Full Load Amps FLA value for gt 7 seconds The unit FLA value is set by adjustment of the FLA potentiometer on the VSD logic board The unit can be started after the RESET push button on the VSD logic board is pressed and the COMPRESSOR switch is cycled to the STOP RESET O position 44 160 54 Ol GBO VSD HIGH PHASE X INVERTER HEATSINK TEMPERATURE This shutdown will occur if the heatsink temperature on phase A B or C designated as X in the message exceeds 70 C 158 F on any of the output pole assemblies This shutdown will seldom occur In most cases where the coolant temperature has risen abnormally the VSD will shut down on Ambient Temperature at 60 C 140 F before the heatsinks can reach 70 C 158 F If this message is displayed make sure there is adequate coolant level ascertain the pump is operating when the unit is running and check the strainer in the primary of the heat exchanger for blockages and silt The unit can be started after the fault condition clears the RESET button on the VSD l
19. to the VSD logic board via the Adaptive Capacity Control ACC board over the serial link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages VSD STOP CONTACTS OPEN See VSD SHUTDOWN REQUESTING FAULT DATA If the microprocessor board in the control panel does not receive the cause of the fault over the serial link within 20 seconds it is assumed it is not available and that message is replaced with this message VSD INITIALIZATION FAILED Upon application of power all boards go through the initialisation process At this time memory locations are cleared program jumper positions are checked and serial communications links are established There are several causes for an unsuccessful initialisation as follows The control panel and the VSD must be energised at the same time The practice of pulling the fuse in the control panel to remove power from the control panel will create a problem Power up must be accomplished by closing the switch disconnect on the VSD cabinet with all fuses in place A power interruption to the VSD logic board will also generate this message 36 160 54 Ol GBO The EPROM s must be of the correct version for each VSD board and they must be installed correctly The EPROM s are created as a set and cannot be interchanged between earlier and later versions Ser
20. 1890 503 419 HP 790 658 HP If an over current trip occurs but the unit restarts and runs without a problem the cause may be attributed to a voltage fluctuation on the power supply feeding the VSD that is in excess of the specified voltage range for this product il YORK This is most likely if the unit was running at or near full load If there should be a sudden dip in supply voltage the current to the motor will increase since the motor wants to draw constant horsepower The unit PRV cannot close quickly enough to correct for this sudden increase in current and the unit will trip on an over current fault If the unit will not re start but keeps tripping on this same shutdown an output pole problem is the most likely cause The VSD will require service under these conditions VSD PHASE X GATE DRIVER A second level of current protection exists on the VSD driver boards themselves in phase A B or C designated as X in the message The collector to emitter saturation voltage of each IGBT is checked continuously while the device is gated on If the voltage across the IGBT is greater than a set threshold the IGBT is gated off and a shutdown pulse is sent to the VSD logic board shutting down the entire VSD system A gate driver fault can be initiated when the VSD is not r unning VSD SINGLE PHASE INPUT POWER This shutdown is generated by the SCR trigger control and relayed to the VSD logic board to initiate a
21. 503 419 HP 790 658 HP ul YORK Ifthe VSD automatically restarts after this shutdown and continues to operate properly with the filter operating it is likely the filter tripped due to fluctuations in the voltage feeding the VSD If this message re occurs preventing the unit from starting the VSD will require service HARMONIC FILTER PHASE LOCKED LOOP This shutdown indicates that a circuit called Phase Locked Loop on the filter logic board has lost synchronisation with the incoming power supply This is usually indicates an open fuse in one of the filter s incoming supplies Filter fuses 11FU 12FU and 13FU should be checked HARMONIC FILTER PRECHARGE LOW DC BUS VOLTAGE During pre charge the filters DC link must be equal to or greater than 41 Vdc 50 Vdc for 60 Hz within 1 10 second after the pre charge relay is energised If this condition is not met a shutdown is performed and this message is generated HARMONIC FILTER LOW DC BUS VOLTAGE The harmonic filter generates its own filter DC link voltage by switching its IGBT s This DC level is higher than what could be obtained by rectifying the input voltage Therefore the harmonic filter performs a voltage boost function This is necessary in order to permit current to flow into the power line from the filter when the input line is at its peak level This shutdown occurs when the filter s DC link voltage decreases to a level less than 60 Vdc below the filte
22. 70 F to a maximum restart of 26 7 C 80 F This OFFSET can be used to reduce unit cycling by delaying the restart until the cooling load has increased dramatically Refrigerant Service Technicians Sensitivity Service Technicians Brine Low Evaporator Cutout Service Technicians Smart Freeze Service Technicians 8 160 54 Ol GBO ia YORK 4 CONDENSER SCREEN a TI 1 Ew Reum Can lrmar iqra Temgper l lewan Camil man Ligam lem n lir Credence Ssl n aniya Temp r in Small Tempra Peer TE 1 Fire Lep eget el Terrel Condenver Pressure mi T g N KIL amenn wich HET BITE Fetiprrani Loval Pct ti oem Eomioener Liquld Few si EDET BETEN li 4 kar an bevel Sepahan Cinder Liquid Pan JE The CONDENSER SCREEN displays a cutaway view of the unit condenser showing current operating temperatures and pressures status of the high pressure and flow switches and cooling liquid pump signal and the refrigerant level position and setpoint Refrigerant Level Control Service Technicians High Pressure Warning Threshold Service Technicians Drop Leg Service Technicians ia YORK 160 54 Ol GBO 5 COMPRESSOR SCREEN Lik lm SG CISC bitile d l Pun OA Piper PT T C4 Gimp Impre Marar Teper ei ali q It ar ge M pede r nu wj ie Byer aand J j J ka s n j i i i E l Arje vanu MAD WW thi 2 sr LETA TT i Fling ___ x Oil riura nlamnid Pre Hariri Ew Var
23. ACTS OPEN The CM 2 current module Electromechanical Starter applications or SSS logic board Mod A Solid State Starter applications has shutdown the unit When detecting a fault condition that places the starter or motor at risk these devices open the motor controller contacts CM located on the respective device and connected between TB6 16 and TB6 53 in the control panel to initiate a shutdown Since there are several different faults that are monitored LED s on the respective device illuminate to identify the specific fault that has occurred NOTE The unit will automatically restart when the motor controller contacts close On some shutdowns the respective device automatically closes the contacts when the fault condition clears Other shutdowns require the OPERATOR to perform a MANUAL RESET at the respective device Refer to manual 160 46 OM3 1 for details of Mod A Solid State Starter shutdowns and manual 160 54 M1 for CM 2 shutdowns MOTOR CONTROLLER LOSS OF CURRENT The compressor motor current decreased to lt 10 Full Load Amps FLA for 25 seconds while the unit was running This could be caused by the starter de energising during run or a defect in the motor current feedback circuitry to the control panel The unit will automatically restart at the completion of SYSTEM COASTDOWN POWER FAULT The CM 2 current module Electro mechanical starter applications or SSS logic board
24. AILS SCREEN a kyl jay FIE Copter nf ear eN Fali van Demand Limit j Full ard ine TE VS Andel Gi We fier amp ult Precharge Hel a I Hip at aye DW A R Link Coden LILA len garne Heating Tarja nadir The VSD DETAILS SCREEN repeats the motor current current limit setpoint and the pulldown demand time remaining shown on the VSD SCREEN The screen also displays the status of the water pump precharge relay and trigger SCR outputs DC bus voltage DC inverter link current and internal ambient convertor heatsink and phase A B and C heatsink temperatures For details of programming the LOCAL MOTOR CURRENT LIMIT and PULLDOWN DEMAND LIMIT and TIME refer to the VSD SCREEN VSD see Section 7 3 8 SETPOINTS SCREEN Tain Cie iia ee Si fart 0 7 Hime ange if I Leming Chilled Lig Temes Cyrliee Sl TT a J Lil aa nl TE Hiera 451 ee ii Lama rier lomis brip Lwe Leroi Chiller Lies epee i The SETPOINTS SCREEN displays the current operating leaving chilled liquid temperature setpoint and remote range low leaving chilled liquid temperature cycling shutdown and restart values and there offset and the current limit setpoint The local leaving chilled liquid temperature SETPOINT and RANGE low leaving chilled liquid temperature cycling SHUTDOWN and RESTART values LOCAL MOTOR CURRENT LIMIT and PULLDOWN DEMAND LIMIT and TIME and REMOTE ANALOGUE INPUT RANGE sh
25. ET key is pressed in OPERATOR or higher access mode All Setpoints will have to be re programmed to their desired values WARNING CONDENSER HIGH PRESSURE LIMIT The condenser pressure exceeds the programmed HIGH PRESSURE WARNING SETPOINT While this condition is in effect the PRV are inhibited from further opening This message automatically clears and the PRV are permitted to open when the condenser pressure decreases to 34 5 kPa 5 PSIG below the SETPOINT WARNING EVAPORATOR LOW PRESSURE LIMIT The evaporator pressure has decreased to the WARNING THRESHOLD This threshold is fixed in WATER COOLING applications 186 2 kPa 27 PSIG In BRINE GLYCOL COOLING applications the threshold is a fixed amount 13 8 kPa 2 PSIG above the programmable SAFETY SHUTDOWN THRESHOLD The SAFETY SHUTDOWN THRESHOLD in BRINE GLYCOL COOLING applications is determined by the brine glycol solution and is fixed York While this condition is in effect the PRV are inhibited from further opening This message automatically clears and the PRV are permitted to open when the evaporator pressure increases to the RESET value This RESET value is fixed in WATER COOLING applications 193 1 kPa 28 PSIG In BRINE GLYCOL COOLING applications the RESET value is a fixed amount 20 7 kPa 3 PSIG above the programmable SAFETY SHUTDOWN THRESHOLD 30 160 54 Ol GBO Models with Variable
26. LDOWN DEMAND LIMIT and TIME are also programmed on this screen Local Motor Current Limit Defines the maximum allowable motor current during operation as a percentage of FLA When the motor current reaches or exceeds the programmed limit the PRV are prohibited from opening or closed to reduce the motor current ud YORK jome Hir i i rl fime warm inahaha T Unive Pulldown Demand Limit Defines the maximum allowable motor current during pulldown demand limiting at unit startup as a percentage of FLA This value overrides the LOCAL MOTOR CURRENT LIMIT for the time specified in the motor current PULLDOWN DEMAND TIME Pulldown Demand Time Specifies the period of time that pulldown demand limiting will be active during unit startup Full Load Amps Service Technicians Supply Voltage Range Service Technicians Current Unbalance Check Service Technicians ul YORK 7 3 VSD SCREEN N TE Li Ce 160 54 Ol GBO 13 AU T l VE j EWIL R BER an D Pa l ay APE E dak imi Sepe Bl fi lis Ewl EN oa Palldaeet Demand Limit alhirmi H ma T iii Phat Fhe E Pher t U run inent faa qe Total Harn nair Ilsinriina vi ite wel is 1 Tal Supply Ern Tote RU L Faai EWI Beet The VSD SCREEN shows the motor current as a percentage of full load amps FLA the current limit setpoint set locally refer to LOCAL MOTOR CURRENT LIMIT or remotely by an analogue signal 0
27. LECT use the 4 and P keys to select the desired value If the previously defined setpointis correct press the X Cancel key to dismiss the dialogue box m Press the V Enter key If the value is within range it is accepted and the dialogue box disappears The unit will begin to operate based on the new programmed value If out of range the value will notbe accepted and the user is prompted to try again ul YORK Master Switch The three position rocker switch is the master control When toggled right it is in the STOP RESET position the middle position is RUN and when momentarily toggled left it is in the START position Inthe STOP RESET position the unit will not run under any condition this enables maintenance and other tasks to be completed safely In addition the switch must be placed in this position following certain shutdowns before the unit is allowed to restart This guarantees that manual intervention has taken place and the shutdown has been acknowledged The START position is used to locally start the unit When set to this position with no fault conditions the unit will enter the system pre lube start sequence In the RUN position the unit will operate normally and automatically restart following cycling shutdowns The switch must be in this position to receive a valid remote start signal when operating from a remote control source Remote Control The control panel expands the
28. Mod A Solid State Starter applications has shutdown the unit because it detected a fault condition that places the motor at risk These devices open and close the motor controller CM contacts located on the respective device and connected between TB6 16 and TB6 53 in the control panel in lt 3 seconds to initiate the shutdown and produce this message The unit will automatically restart when the contacts close Q NOTE An LED on the respective device illuminates to identify the specific fault that has occurred Refer to manual 160 46 OM3 1 for details of Mod A Solid State Starter shutdowns and manual 160 54 M1 for CM 2 shutdowns ul YORK CONTROL PANEL SCHEDULE The programmed DAILY SCHEDULE SETPOINT has shutdown the unit If this occurs while the unit is running the PRV are driven fully closed prior to shutting down the unit The unit will automatically restart at the next scheduled start time PROXIMITY PROBE LOW SUPPLY VOLTAGE This message indicates that the 12 Vdc power supply voltage to the proximity probe has decreased to lt 9 5 Vdc which is below the minimum level required for reliable probe operation The unit will automatically restart when the voltage increases to gt 10 0 Vdc OR This message indicates the 24 Vdc power supply voltage to the proximity probe has decreased to 19 0 Vdc which is below the minimum level required for reliable operation The unit will automatically restart w
29. N LCSSS PHASE LOCKED LOOP automatically restart when lock has resumed LCSSS LOW SUPPLY LINE VOLTAGE The LCSSS logic trigger board has detected that the compressor motor AC power supply in any phase decreased below the low voltage threshold for 20 seconds The unit will automatically restart when the voltage in all phases returns to the restart level LCSSS HIGH SUPPLY LINE VOLTAGE The LCSSS logic trigger board has detected that the compressor motor AC power supply in any phase exceeded the high voltage threshold for 20 seconds The unit will automatically restart when the voltage in all phases returns to the restart level ul YORK LCSSS Supply Voltage Thresholds Supply Low Supply Voltage High Supply Voltage Voltage Re start Shutdown Re start Range V _ V v v v Disabled 200 208 220 240 380 400 415 440 480 550 600 LCSSS LOGIC BOARD PROCESSOR Communication between the V25 Microprocessor and Digital Signal Processor DSP on the LCSSS logic trigger board has been interrupted The unit will automatically restart when communications are r estored LCSSS LOGIC BOARD POWER SUPPLY Following application of power this message is displayed and a snapshot of the LCSSS parameters and time of power failure are sent to the control panel LCSSS PHASE ROTATION LOSS Flash Memory Card Version C MLM 01 03 or earlier The LCSSS logic trigger board has detected
30. RESSOR switch is cycled to the STOP RESET O position The Brine Glycol SAFETY SHUTDOWN THRESHOLD should only be changed by a qualified Service Technician using manual 160 54 M1 EVAPORATOR LOW PRESSURE SMART FREEZE Flash memory card version C MLM 01 02 or later Smart Freeze protection is activated and has shutdown the unit because the evaporator temperature has been below the SMART FREEZE THRESHOLD for greater than the allowable number of seconds If the evaporator refrigerant temperature sensor RT7 is enabled see manual 160 54 M1 this parameter is used as the evaporator refrigerant temperature and the freeze threshold is 0 5 C 32 8 F If RT7 is not enabled the evaporator refrigerant temperature used is the evaporator saturation temperature derived from the evaporator pressure transducer and the freeze threshold is 1 1 C 34 F The total count is incremented once for every second the evaporator refrigerant temperature is below the freeze threshold but is never decremented below zero The number of seconds it will take the chilled liquid to freeze is based on how far the evaporator refrigerant temperature is below the freeze threshold Q NOTE Smart Freeze is active when enabled by a Service Technician using manual 160 54 M1 and the LEAVING CHILLED LIQUID TEMPERATURE SETPOINT is lt 3 3 38 F 40 160 54 Ol GBO EVAPORATOR TRANSDUCER OR LEAVING LIQUID PROBE A poss
31. SERIAL COMMUNICATIONS Serial communications between the microprocessor board and the optional analogue I O board has been interrupted for at least 20 seconds 10 2 4 Routine Shutdown Messages A shutdown command has been received from a remote device REMOTE STOP commands can be received in DIGITAL REMOTE MODE via I O board TB4 7 8 or in ISN Integrated Systems Network REMOTE MODE via the General Protocol Interface Card GPIC serial communications If the unit is running when this occurs the PRV are driven fully closed prior to shutting down the unit LOCAL STOP A local shutdown command has been received by placing the unit START RUN STOP RESET switch in the STOP O position PLACE COMPRESSOR SWITCH IN RUN POSITION The control panel is in either DIGITAL REMOTE MODE or ISN REMOTE MODE The OPERATOR is requested to place the COMPRESSOR switch in the RUN position The control panel will not accept a remote START STOP command unless the COMPRESSOR switch is in the RUN position ul YORK 10 3 Cycling Shutdown Messages MULTIUNIT CYCLING CONTACTS OPEN The MULTIUNIT CYCLING contacts connected to I O board TB4 9 have opened to initiate a cycling shutdown If the unit is running when this occurs the PRV are driven fully closed prior to shutting down the unit The unit will automatically restart when the contacts close SYSTEM CYCLING CONTACTS OPEN The SYSTEM CYCLING conta
32. SS logic trigger board detected that the compressor motor current in any phase exceeded 1 1 1 414 x RMS value of the programmed start current fora minimum of 1 second The unit can be started after the COMPRESSOR switch is cycled to the STOP RESET O position LCSSS HIGH PHASE X HEATSINK TEMPERATURE RUNNING The LCSSS logic trigger board has detected the temperature of phase A B or C designed as X in the message SCR modules has exceeded 100 C 212 F while the unit was running The safety can be reset after all SCR temperatures are lt 100 C 212 F and the COMPRESSOR switch is cycled to the STOP RESET O position NOTE LCSSS 105 MOTOR CURRENT OVERLOAD The unit cannot be started until all SCR temperatures are lt 42 8 C 109 F During the shutdown the starter cooling pump runs until the temperature is lt 42 8 C 109 F The highest phase of the compressor motor current increased to gt 105 of the programmed 100 unit Full Load Amps for 40 seconds The unit can be started after the COMPRESSOR switch is cycled to the STOP RESET O position LCSSS MOTOR OR STARTER CURRENT IMBALANCE The LCSSS logic trigger board detected that the three phase compressor motor current imbalance was gt 30 for 45 seconds ul YORK The imbalance is not checked until the unit has been running for at least 45 seconds and the average of the three phases of motor curren
33. Speed Drive VSD only WARNING VANES UNCALIBRATED FIXED SPEED The compressor motor VSD is operating in Fixed Speed full soeed mode because the PRV position potentiometer calibration has not been performed WARNING HARMONIC FILTER OPERATION INHIBITED The compressor motor VSD harmonic filter has been inhibited Harmonic filter operation should only be modified by a qualified Service technician Refer to VSD Service Manual 160 00 M1 CAUTION ie WARNING HARMONIC FILTER DATA LOSS Communications between the harmonic filter logic board and the compressor motor VSD logic board or the Adaptive Capacity Control ACC board is not occurring While this condition exists all filter related parameters are displayed as X s This message automatically clears when communications are restored WARNING HARMONIC FILTER INPUT FREQUENCY RANGE The power line frequency detected by the compressor motor VSD harmonic filter is outside the range of 49 to 51 Hz 50 Hz units or 58 to 62 Hz 60 Hz units While this condition exists all filter related parameters are displayed as X s This message automatically clears when the line frequency is within range ul YORK Models with Hot Gas By pass only WARNING VANES UNCALIBRATED The Hot Gas By pass feature is enabled but the PRV calibration procedure has not yet been performed Models with Analogue I O Board WARNING EXTERNAL I O
34. TAR ES ai edt i i 6 160 54 Ol GBO 3 EVAPORATOR SCREEN Tal JEL u BE TI emperi e Foti TEL TE HI RT ETI LEru l r Serial bene aire OTe rie wiper Presna Erapeor Sateen emperi BES b ui l an and ad Ld J k Ll Aa aire The EVAPORATOR SCREEN displays a cutaway view of the unit evaporator showing current operating temperatures and pressures status of the flow switch and liquid pump signal and the control setpoints The local leaving chilled liquid temperature SETPOINT and RANGE and leaving chilled liquid temperature cycling offset SHUTDOWN and RESTART values are also programmed on this screen Setpoint Defines the leaving chilled liquid temperature that is to be maintained by the unit The SETPOINT can be programmed between 3 3 C 38 F and 21 1 C 70 F for water cooling applications or 12 2 C 10 F and 21 1 C 70 F for brine glycol applications 2 NOTE When Smart Freeze has been enabled by a qualified Service Technician the programmable SETPOINT is 2 2 C 36 F to 21 1 C 70 F for water cooling applications ul YORK Pall a Hi i fi Sis BR Ret m0 li E Ched I arma Hm Ewi Aed pid Peng Lw eed Li e abi j Range The programmed SETPOINT can be reset offset upwards by an analogue signal 0 20 mA 4 20 mA 0 10 Vdc or 2 10 Vdc in the analogue remote mode or PWM signal in digital remote mode The offset RANGE may be programmed t
35. TDOWN has completed the COMPRESSOR switch has been cycled to the STOP RESET O position Models with Mod B Solid State Starter only Liquid Cooled Solid State Starter LCSSS LCSSS HIGH TEMPERATURE PHASE X STOPPED The unit is stopped and the LCSSS logic trigger board has detected that the temperature of phase A B or C designated as X in this message silicon controlled rectifier SCR module is gt 43 3 C 110 F The starter cooling pump will run and the unit will be inhibited from starting until the temperature decreases to lt 42 8 C 109 F ul YORK 10 2 3 Warning Messages WARNING REAL TIME CLOCK FAILURE During the power up initialisation process test data is written to a location in the BRAM battery backed memory device U52 on the microprocessor board This data is then read from the BRAM and compared to the test data When a difference occurs it is assumed the BRAM and real time clock operation is defective and this message is displayed The BRAM should be replaced by a qualified Service Technician This message automatically clears when the BRAM fault has been repaired i gt CAUTION WARNING CONDENSER OR EVAPORATOR XDCR ERROR The evaporator pressure transducer is indicating a higher pressure than the condenser pressure transducer after the unit has been running for 10 minutes This indicates failure of the condenser or evaporator transducer This message will b
36. YK CENTRIFUGAL LIQUID CHILLER OptiView Control Panel OPERATION INSTRUCTION K uaa YORK Effective from 11 00 INTERNATIONAL 10 i 160 54 Ol GBO HOME SCREEN SYSTEM SCREEN EVAPORATOR SCREEN CONDENSER SCREEN COMPRESSOR SCREEN OIL SUMP SCREEN MOTOR SCREENS 7 1 EM STARTER SCREEN 7 2 SOLID STATE STARTER SCREEN 7 3 VSD SCREEN SETPOINTS SCREEN 8 1 SETUP SCREEN HISTORY SCREEN 9 1 TRENDS SCREEN 9 2 CUSTOM SCREEN DISPLAY MESSAGES 10 1 SYSTEM STATUS Messages 10 2 SYSTEM DETAILS Messages 10 3 Cycling Shutdown Messages 10 4 Safety Shutdown Messages ul YORK Contents 10 11 11 12 13 15 17 22 23 26 27 27 28 31 39 il YORK OptiView Control Panel 160 54 Ol GBO 1 Display The YORK OptiView Control Panel Graphic Control Centre is a microprocessor based control system for YK centrifugal chillers It controls the leaving chilled liquid temperature via pre rotation vane PRV controls and has the ability to limit motor current via control of the PRV It is compatible with electro mechanical starter optional YORK Solid State Starter SSS and optional Variable Speed Drive VSD applications The panel has a full screen LCD graphic display with a keypad interface The graphic display allows the presentation of several operating parameters at once In addition the operator may view a graphical representation of the historical operation of the unit as well as th
37. arted due to the condition displayed in the SYSTEM DETAILS VANES CLOSING BEFORE SHUTDOWN One of the following shutdowns has been initiated When the Pre rotation Vanes PRV have fully closed the unit will shutdown Leaving Chilled Liquid Low Temperature m Multi unit Cycling Contacts Open m Control Panel Schedule m System cycling Contacts Open n Remote Stop 28 160 54 Ol GBO 10 2 SYSTEM DETAILS Messages 10 2 1 Run Messages LEAVING CHILLED LIQUID CONTROL The unit is running controlling the leaving chilled liquid to the LEAVING CHILLED LIQUID TEMPERATURE SETPOINT There are no system conditions inhibiting this operation CURRENT PULLDOWN LIMIT The pulldown demand limit setpoint timer is in effect and the compressor motor current is gt the PULLDOWN DEMAND CURRENT LIMIT SETPOINT value The PRV operation is being inhibited Refer to MOTOR HIGH CURRENT LIMIT message below MOTOR HIGH CURRENT LIMIT The compressor motor current is gt the local or remote CURRENT LIMIT SETPOINT The CURRENT LIMIT SETPOINT is programmed over a range of 30 to 100 of the unit Full Load Amps FLA When the motor current increases to the INHIBIT OPEN threshold the PRV are inhibited from further opening This prevents a further current rise If the current continues to rise to the START CLOSE threshold the PRV begin closing until the current falls to the STOP CLOSE threshold Automa
38. been found to work adequately on most applications Some areas may have very dirty condenser water which can cause the strainer to block Locations with special conditions may want to consider a dual strainer arrangement with isolating valves to permit cleaning of one strainer with the unit still on line 160 54 Ol GBO 37 Blocked Heat Exchanger In cases where the strainer blocks frequently the heat exchanger may eventually block or become restricted to the point of reduced flow At this point we suggest you back flush the heat exchanger by reversing the two rubber hoses that supply condenser water to from the heat exchanger If the rust cannot be back flushed the heat exchanger might have to be replaced Low Condenser Flow The VSD system requires 8 feet of pressure drop across the heat exchanger to maintain adequate flow If the pressure drop is less than 8 feet it will be necessary to correct the flow problem or add a booster pump as required VSD INVALID CURRENT SCALE SELECTION The same VSD logic board is used on all horsepower sizes the position of Program Jumpers tells the logic board the size of the VSD employed This allows the VSD to properly scale the output current If the Jumper configuration is invalid a shutdown is performed and this message is generated VSD LOW PHASE X INVERTER HEATSINK TEMPERATURE A heatsink temperature sensor indicating a temperature lt 2 8 C 37 F in phase A B or C
39. capabilities of remote control and communications By providing a common networking protocol through the ISN YORK units can be standalone or part of a group This new protocol allows increased remote control of the unit as well as 24 hour performance monitoring via a remote site In addition compatibility is maintained with the present network of ISN communications The unit also maintains the standard digital remote capabilities as well Both of these remote control capabilities allow for the standard Energy Management System EMS interface m Remote Start Remote Stop and Remote Ready to Start contacts m Remote Leaving Chilled Liquid Temperature Setpoint and Remote Current Limit Setpoint adjustment 0 10VDC 2 10VDC 0 20mA or 4 20mA or Pulse Width Modulation m Cycling and Safety Shutdown Contacts 160 54 Ol GBO 3 There are certain displayed values programmable setpoints and controls shown in this manual that are for Service Technician use only These are only displayed when logged in at SERVICE access level or higher The setpoints and parameters displayed on these screens are explained in detail in manual 160 54 M1 NOTE These parameters affect unit operation and should NEVER be modified by anyone other than a qualified Service Technician 4 160 54 Ol GBO ia YORK 1 HOME SCREEN thal EEEL k En ar pils d 2 Fem Loot Ampa Darraningy Mere mn Him The HOME SCREEN is displayed by default at
40. cts connected to I O board TB4 13 have opened to initiate a cycling shutdown If the unit is running when this occurs the PRV are driven fully closed prior to shutting down the unit The unit will automatically restart when the contacts close OIL LOW TEMPERATURE DIFFERENTIAL The unit is prevented from starting because for one of the following reasons The unit will automatically restart when the conditions have been satisfied m The unit has been shut down for lt 30 minutes and the oil temperature minus the condenser saturation temperature is lt 1 1 C 30 F m The unit has been shut down for gt 30 minutes and the oil temperature minus the condenser saturation temperature is lt 4 4 C 40 F Following a Power failure upon restoration of power the oil temperature minus the condenser saturation temperature is lt 4 4 C 40 F OIL LOW TEMPERATURE The oil temperature has decreased to lt 12 8 C 55 F The unit will automatically restart when the temperature increases to gt 12 8 C 55 F and is greater than the condenser saturated temperature by 1 1 C 30 F or 4 4 C 40 F refer to OIL LOW TEMPERATURE DIFFERENTIAL message description above 160 54 Ol GBO 31 CONTROL PANEL POWER FAILURE A control power failure has occurred If the power failure occurred while the unit was running it will automatically restart when power is restored However if the power failure durat
41. designated as X in the message will cause the unit to shut down and display this message In most cases the problem will be an open thermistor or broken wiring to the thermistor The normal thermistor resistance is 10K ohms at 21 1 C 70 F VSD LOW CONVERTER HEATSINK TEMPERATURE Refer to LOW PHASE A INVERTER HEATSINK TEMPERATURE message VSD PRECHARGE LOW DC BUS VOLTAGE During Pre charge the DC link must be equal to or greater than 41 Vdc 50 Vdc for 60 Hz within 2 second after the Pre charge relay is energised If this condition is not met a shutdown is performed and this message is g enerated VSD LOGIC BOARD PROCESSOR This shutdown is generated if a communications problem occurs between the two microprocessors on the VSD logic board 38 160 54 Ol GBO VSD RUN SIGNAL Redundant RUN signals are generated by the control panel one via TB6 24 and the second via the serial communications link Upon receipt of either of the two RUN commands by the VSD a 5 second timer shall commence timing If both run commands are not received by the VSD logic board within 5 seconds a shutdown is performed and this message is displayed This generally indicates a wiring problem between the control panel and the VSD VSD SERIAL COMMUNICATIONS This message is generated when communications between the ACC board and the VSD logic board or between the control panel microprocessor board and the VSD lo
42. e displayed until the condition clears and the WARNING RESET key is pressed in OPERATOR or higher access mode WARNING REFRIGERANT LEVEL OUT OF RANGE The transducers are not checked in when the unit is in the BRINE GLYCOL mode The output of the condenser refrigerant level sensor is gt 5 1 Vdc This indicates failure of the level sensor While this condition exists the refrigerant variable orifice is driven to the full open position This message automatically clears when the refrigerant level sensor output is within range WARNING STANDBY LUBE LOW OIL PRESSURE A minimum of 103 5 kPa 15 PSID of differential oil pressure was not achieved in the first 30 seconds of a standby lubrication cycle or the pressure decreased below this value during the remainder of the cycle This message will be displayed and no further standby lubrications will be performed until the WARNING RESET key is pressed in OPERATOR or higher access mode 160 54 Ol GBO 29 WARNING SETPOINT OVERRIDE A blank BRAM U52 on the microprocessor board or a failure of this device was detected during the initialisation process that occurs when power is applied to the control panel Due to this failure any or all of the programmed SETPOINTS could have been corrupted Therefore all SETPOINTS have been automatically changed to their default values Q NOTE This message will clear when the WARNING RES
43. e filter is not operating correctly and the input current to the VSD filter is not sinusoidal This shutdown will occur if the total demand distortion TDD exceeds 25 for 45 seconds TDD is the total root sum square harmonic current distortion in percent of the maximum demand load current 15 or 30 min demand Inthe York supplied filter option the displayed TDD is the total RMS value of all the harmonic current supplied by the main power to the VSD divided by the unit Full Load Amps in percent A standard VSD less the optional filter typically has an input current TDD level on the order of 28 30 The unit can be started after the COMPRESSOR switch is cycled to the STOP RESET O position ial YORK Europe YORK INTERNATIONAL YORK FRANCE Subject to change without notice Z I 14 rue de Bel Air B P 44473 Carquefou Cedex France ALL RIGHTS RESERVED For further information please contact your local area Sales Office Part No 160 54 Ol GBO 11 00
44. e present operation For ease of use the locations of displayed parameters are clearly and intuitively marked and instructions for specific operations are provided on many of the screens Information can be displayed in both metric SI temperatures in C and pressures in kPa or English Imperial temperatures in F and pressures in PSIG units in a number of languages The control panel also displays the unit operation using status and warning messages and records the cause of any shutdowns Safety Cycling or Normal This information is stored in battery backed for viewing Numeric Keypad O wa O 4 5 Cursor Keys C 7J 8 Cancel and o r Enter x 4 Master Y Switch Soft keys for Control and Navigation Information on the display falls into three distinct groups Display Only Programmable and Navigation The Programmable values and Navigation commands are subject to access level control Display Only information is read only parameters about unit operation This information may be represented by a numerical value a text string or an LED image For numerical values if the monitored parameter is above the normal operating range the high limit value will be displayed along with the gt symbol if it is below the normal operating range the low limit value will be displayed along with the lt symbol In some cases the value may be rendered invalid by oth
45. ed as zero off and one on Only one Y Axis label is displayed at a time The Y Axis Toggle Key is used to toggle the Y Axis labels through the different parameters The Y Axis label that is being displayed is identified at the top of the graph All parameters are displayed simultaneously For identification each plotted parameter and associated Y Axis labelling is colour co ordinated The parameters are sampled at the selected Data Collection Interval and plotted using 450 data points across the X Axis If the actual value of the sampled parameter is less than the Y Axis label minimum for that parameter the value will be plotted at the minimum value Similarly if the actual value is greater than the Y Axis label maximum for that parameter the value will be plotted at the maximum value 160 54 Ol GBO 23 Home Tomi Tm There are two types of charts that can be created ONE SCREEN or CONTINUOUS When the plotting has reached the end of the X Axis one of the following will occur depending on which is selected If ONE SCREEN has been selected the trending stops and the data is frozen If CONTINUOUS has been selected the oldest data is dropped from the left hand side of the graph at the next Data Collection Interval Thereafter the oldest data is dropped from left hand side of the graph at each Data Collection Interval If a power failure occurs while the trending is running the trending is stopped Upon restoration o
46. ee phase AC supply for severe dips and also monitor the DC link with a voltmeter VSD DC BUS VOLTAGE IMBALANCE The DC link is filtered by a number of large electrolytic capacitors rated for 450 Vdc These capacitors are wired in series to achieve 900 Vdc capability for the DC link It is important that the voltage be shared equally from the junction of the centre or series capacitor connection to the negative bus and the positive bus This centre point should be approximately 1 2 of the total DC link voltage Most actual bus voltage imbalance conditions are caused by a shorted capacitor or a leaky or shorted IGBT transistor in an output phase bank assembly This usually indicates the VSD requires service VSD PRECHARGE DC BUS VOLTAGE IMBALANCE This message indicates the same as the VSD DC BUS VOLTAGE IMBALANCE message above except the condition occurred during the Pre lube period VSD HIGH INTERNAL AMBIENT TEMPERATURE The ambient temperature monitored is actually the temperature detected by a component mounted on the VSD logic board The high ambient trip threshold is set for 60 C 140 F Some potential causes for this shutdown are internal VSD fan failure VSD water pump failure m entering condenser water temperature exceeds limits Additional causes for the shutdown are m Blocked Strainer The standard strainer contains a woven mesh element with 20 stainless steel wires per inch This has
47. er conditions and the display will use X s to indicate this Programmable information can be changed by the operator service technician to program system settings the operator service technician must be logged in with the appropriate access level Navigation allows movement between the different screens 2 160 54 Ol GBO Access Level Three access levels are available View This is the default access level available automatically when power is applied to the unit allowing navigation of the screens and access to display only information Operator This access level is entered using the LOGIN button on the HOME SCREEN A User ID and Password have to be entered using the numeric keypad OPERATOR access automatically reverts to the VIEW after 10 minutes without a key press The OPERATOR access level allows navigation of the screens access to display only information and programming of a number of system settings NOTE Service OPERATOR access level can also be entered directly from the SETPOINTS SCREEN without returning to the HOME SCREEN SERVICE access level is for qualified service personnel only The soft keys surrounding the display are redefined based onthe currently displayed screen The buttons on the right side and base of the panel are used for navigation and selection of parameters The keypad is used for data entry with a standard numeric keypad provided for entry of system se
48. f power the last screen of data that was collected will be displayed on the trending screen The START key must be pressed to initiate a new trend screen Trend Setup see Section 9 1 1 24 160 54 Ol GBO ia YORK 9 1 1 TREND SETUP SCREEN Ewu Ermm Fesimiirr PI sarim i JA riie S Bimm Fi jarim iT BE Fizaimi iT Breim l lt enir kiry kr m lert N perri The Slot Nos see Section 9 1 2 and Select buttons are used to enter the slot numbers and the minimum and maximum Y Axis values of each parameter to be trended The slot number can be obtained from the Common Slots Screen or Master Slot Number List Setting this slot number to zero will disable trending for that particular Data Point There are 20 Y Axis divisions between the minimum and maximum values If a MIN MAX span is selected that is not evenly divided by 20 the program will automatically select the next higher MAX value that makes the span divisible by 20 The minimum value must always be set to a value less than the maximum value and the minimum value should be set to zero 0 for digital parameters with the maximum value set to one 1 eee bee Sarre bap Til ere id YORK 160 54 Ol GBO 25 9 1 2 TREND COMMON SLOTS SCREEN ct muni S2 ip 1457 199 TIRE THTTREATIORAL DIRPERI TT EE FT Asa 1994 1 T l PH SG gan u al k n Hoera Pid Haer DE Sar le aye Drm Eraporater HT Caawing Chilled Ligasi d Timpar atusa
49. gic board is disrupted This generally indicates defective wiring between J11 on the VSD logic board and J8 on the ACC board HARMONIC FILTER LOGIC BOARD OR COMMUNICATIONS This message is generated when communications between the harmonic filter and the VSD logic board is disrupted This generally indicates defective wiring between the VSD logic board and the harmonic filter logic board or a defective harmonic filter logic board HARMONIC FILTER HIGH DC BUS VOLTAGE The harmonic filters DC Link voltage is continuously monitored and if the level exceeds 860 Vdc this shutdown is performed The harmonic filter has its own DC bus as part of the filter power assembly this DC Link is independent from the VSD DC link If this shutdown occurs it will be necessary to look at the level of 460 Vac supplied to the harmonic filter The specified voltage range is 414 to 508 If the incoming voltage is in excess of 508 it should be reduced to within specified limits HARMONIC FILTER HIGH PHASE X CURRENT The maximum instantaneous harmonic filter current in phase A B or C designated as X in the message is monitored and compared to a pre set limit If this limit is exceeded a shutdown is performed and this message is generated The filter current is monitored using two DC current transformers and these signals are processed by the filter logic board The pre set limits are as follows Current A 351 292 HP 356 496 745
50. hen the voltage increases to gt 19 7 Vdc Models with Variable Speed Oil Pump OIL VARIABLE SPEED PUMP DRIVE CONTACTS OPEN The Variable Speed Oil Pump VSOP has shut down the unit by opening its status contacts connected to the I O board TB3 70 The VSOP initiates a shutdown anytime its internal protection circuits will not permit the VSOP to run The contacts remain open until its internal protection circuits are satisfied it is safe to operate The unit will automatically restart when the contacts close Q NOTE Some VSD initiated shutdowns require AC power to be cycled to clear the fault Refer to manual 160 54 M1 ul YORK 10 3 1 Cycling Shutdown Messages Models with MOD A Solid State Starter STARTER LOW SUPPLY LINE VOLTAGE The voltage in any phase of the AC supply to the Solid State Starter SSS has decreased to the LOW LINE VOLTAGE THRESHOLD for 20 seconds The unit will automatically restart when the voltage returns to the RESTART level STARTER HIGH SUPPLY LINE VOLTAGE The voltage in any phase of the AC supply to the SSS has increased to the HIGH LINE VOLTAGE THRESHOLD for 20 seconds The unit will automatically restart when the voltage returns to the RESTART level SSS Supply Voltage Thresholds Supply Low Supply Voltage High Supply Voltage Voltage Range V Re start Shutdown Re start V V V v Disabled 380 400 415 440 480 550 600 160 54 Ol
51. ial data communications must be established Refer to VSD SERIAL COMMUNICATIONS FAULT If communications between the VSD logic board harmonic filter logic board ACC board and control panel microprocessor board does not take place during initialisation this message will be generated The serial communications can be verified by selecting the VSD DETAILS screen from the MOTOR screen and observing the full load amps value A zero displayed for this and other VSD parameters indicates a serial communications link problem m If the harmonic filter option is included make sure the filter logic board is not in continuous reset This condition is indicated by the filter logic board s LED s alternately blinking The filter can be eliminated as a cause of initialisation failure by disconnecting the filter by placing switch SW1 on the filter logic board in the OFF position and removing the ribbon cable between the filter logic board and the VSD logic boards m VSD and harmonic filter horsepower ratings do not agree VSD HIGH PHASE X INSTANTANEOUS CURRENT This shutdown is generated by the VSD if the motor current in phase A B or C designated as X in the message exceeds a given limit The motor current is sensed by the current transformers on the VSD output pole assemblies and the signals are sent to the VSD logic board for processing Maximum instantaneous permissible currents are Current A 351 292 HP 771 1200
52. ible defective evaporator pressure transducer or leaving chilled liquid temperature thermistor has been detected The pressure and temperature that these devices are indicating are not in the correct relationship to each other The control panel converts the evaporator pressure toa saturated temperature value and compares this value to the leaving chilled liquid temperature difference chilled liquid temperature evaporator saturated temperature The difference should not be outside the range of 19 3 C 2 5 F to 3 9 C 25 F If the transducer and thermistor are accurate the evaporator saturated temperature should not be gt 1 4 C 2 5 F warmer nor gt 13 9 C 25 F colder than the leaving chilled liquid temperature In order to initiate a shutdown the difference must be outside the acceptable range for 10 minutes The unit can be restarted by cycling the COMPRESSOR switch to the STOP RESET O position EVAPORATOR TRANSDUCER OR TEMPERATURE SENSOR A possible defective evaporator pressure transducer or refrigerant temperature sensor has been detected The control panel converts the evaporator pressure to a saturated temperature value and compares this value to the optional evaporator refrigerant temperature sensor If the difference between these temperatures is greater than 1 7 C 3 F for 1 minute this shutdown is performed This check is not performed until the unit has been running
53. ion was lt the duration of the COASTDOWN period 150 seconds when power is restored the remainder of the COASTDOWN will be performed prior to the unit starting This message can indicate a CYCLING in orange characters auto restart after power failure or SAFETY in red characters manual restart after power failure shutdown depending upon control panel configuration D NOTE LEAVING CHILLED LIQUID LOW TEMPERATURE The control panel is configured for auto restart or manual restart after power failure by a qualified Service Technician The leaving chilled liquid temperature has decreased to the programmed SHUTDOWN TEMPERATURE SETPOINT If the unit is running when this occurs the PRV are driven fully closed prior to shutting down the unit The unit will automatically restart when the temperature increases to the programmed RESTART TEMPERATURE SETPOINT LEAVING CHILLED LIQUID FLOW SWITCH OPEN The chilled liquid flow switch has remained open for 2 seconds while the unit was running or failed to close during the SYSTEM PRE LUBE period The unit will automatically restart when the flow switch closes CONDENSER FLOW SWITCH OPEN The condenser water flow switch has remained open for 2 seconds while the unit was running This check is by passed for the first 30 seconds of SYSTEM RUN The unit will automatically restart when the flow switch closes 32 160 54 Ol GBO MOTOR CONTROLLER CONT
54. o 5 6 C 10 F or 11 1 C 20 F 11 1 C is the default RANGE For example if the SETPOINT is programmed for 7 C and the programmed RANGE is 5 6 C then the remote device can set the leaving chilled liquid temperature setpoint over the range 7 C to 12 6 C Additionally a remote GPIC device in ISN remote mode can define the setpoint through a serial data stream ul YORK Cycling Offset Shutdown Defines the leaving chilled liquid temperature at which the unit will shutdown on a LEAVING CHILLED LIQUID LOW TEMPERATURE The OFFSET below SETPOINT can be programmed between 0 56 C 1 F and 35 6 C 64 F to a minimum cut out of 2 2 C 36 F for water cooling applications 1 1 C 34 F with Smart Freeze enabled or 14 4 C 6 F for brine glycol applications When the programmed leaving chilled liquid temperature SETPOINT is changed the shutdown is fixed at of 2 2 C 36 F for water cooling applications 1 1 C 34 F with Smart Freeze enabled or 14 4 C 6 F for brine glycol applications for the next ten minutes The shutdown will then revert to the SETPOINT plus the OFFSET after ten minutes has elapsed 160 54 Ol GBO 7 Cycling Offset Restart Defines the leaving chilled liquid temperature at which the unit will restart after a LEAVING CHILLED LIQUID LOW TEMPERATURE shutdown The OFFSET above SETPOINT can be programmed between 0 C 0 F and 21 1 C
55. ogic board is pressed and the COMPRESSOR switch is cycled to the STOP RESET O position VSD HIGH CONVERTER HEATSINK TEMPERATURE See HIGH PHASE X INVERTER HEATSINK TEMPERATURE message VSD PRECHARGE LOCKOUT If the VSD fails to make Pre charge the Pre charge relay shall drop out for 10 seconds during which time the VSD s fans and water pumps shall remain energised in order to permit the Pre charge resistors to cool Following this 10 second cool down period Pre charge shall again be initiated The VSD shall attempt to make Pre charge 3 consecutive times If the VSD fails to make Pre charge on 3 consecutive tries the unit will shut down lockout and display this message The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position HARMONIC FILTER HIGH HEATSINK TEMPERATURE The harmonic filter power assembly has one heatsink thermistor on the 351 and 503 HP units and two heatsink thermistors on the 790 HP units If the temperature on any heatsink exceeds 75 C 167 F the unit will shut down This message is usually an indication of a low coolant level in the VSD cooling loop The unit can be started after the fault condition clears the OVERTEMP RESET button on the filter logic board is pressed and the COMPRESSOR switch is cycled to the STOP RESET O position ul YORK HARMONIC FILTER HIGH TOTAL DEMAND DISTORTION This shutdown indicates th
56. ould be programmed on this screen Setpoint Defines the leaving chilled liquid temperature that is to be maintained by the unit The SETPOINT can be programmed between 3 3 C 38 F and 21 1 C 70 F for water cooling applications or 12 2 C 10 F and 21 1 70 F for brine glycol applications D NOTE When Smart Freeze has been enabled by a qualified Service Technician the programmable SETPOINT is 2 2 C 36 F to 21 1 C 70 F for water cooling applications Lan ma Chil kewn li ari d un Tamprnr teen Lying Ren 160 54 Ol GBO 15 Range The programmed SETPOINT can be reset offset upwards by an analogue signal 0 20 mA 4 20 mA 0 10 Vdc or 2 10 Vdc in the analogue remote mode or PWM signal in digital remote mode The offset RANGE may be programmed to 5 6 C 10 F or 11 1 C 20 F 11 1 C is the default RANGE For example if the SETPOINT is programmed for 7 C and the programmed RANGE is 5 6 C then the remote device can set the leaving chilled liquid temperature setpoint over the range 7 to 12 6 D Additionally a remote GPIC device in ISN remote mode can define the setpoint through a serial data stream 16 160 54 Ol GBO Cycling Offset Shutdown Defines the leaving chilled liquid temperature at which the unit will shutdown on a LEAVING CHILLED LIQUID LOW TEMPERATURE The OFFSET below SETPOINT can be programmed between 0 56 C 1 F and 35 6 C
57. r DC link voltage setpoint This setpoint is determined by the filter logic board via the sensing of the three phase input line to line voltage This setpoint is set to the peak of the sensed input line to line voltage plus 32 volts not to exceed 760 volts and it varies with the input line to line voltage If this shutdown occurs occasionally the likely cause is a severe dip in the input line voltage HARMONIC FILTER DC BUS VOLTAGE IMBALANCE The filter DC link is filtered by large electrolytic capacitors rated for 450 Vdc These capacitors are wired in series to achieve a 900 Vdc capability for the DC link It is important the voltage is shared equally from the junction of the centre or series capacitor connection to the negative bus and to the positive bus This centre point should be approximately 1 2 of the total DC link voltage ul YORK HARMONIC FILTER 110 INPUT CURRENT OVERLOAD The three phases of RMS filter current are monitored and if any one of the three phases continuously exceeds a given threshold for 7 seconds a unit shutdown is performed and this message is displayed The maximum permissible continuous RMS current ratings for the harmonic filter are Model Current A 351 292 HP 128 503 419 HP 176 790 658 HP HARMONIC FILTER LOGIC BOARD POWER SUPPLY The low voltage power supplies on the filter logic board have decreased below their permissible operating range The filter logic board receives its
58. riod or during the first 15 seconds of System Run OR m Anytime after the first 30 seconds of System run the differential oil pressure was lt the OIL PRESSURE SETPOINT with the speed command from the microprocessor board at 60 Hz for 5 seconds CONTROL PANEL POWER FAILURE A control power failure has occurred If the power failure duration was lt the duration of the applicable Coastdown period 150 seconds the remainder of the Coastdown is performed upon restoration of power The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position This message can indicate a CYCLING in orange characters auto restart after power failure or SAFETY in red characters manual restart after power failure shutdown depending upon control panel configuration NOTE The control panel is configured for auto restart or manual restart after power failure by a qualified Service Technician Models with Mod A Solid State Starter only MOTOR OR STARTER CURRENT IMBALANCE While the unit was loaded to gt 80 Full Load Amps FLA the motor current in phase A B or C was gt or lt 30 of the average of all three phase currents for 45 seconds This condition is not checked for the first 45 seconds of System Run NOTE To allow the unit to run in abnormal conditions this check can be disabled by a qualified Service Technician using manual 160 54 M1
59. rrent PULLDOWN DEMAND TIME Pulldown Demand Time Specifies the period of time that pulldown demand limiting will be active during unit startup Remote Analog Input Range Flash Memory Card version C MLM 01 01 or later Defines the signal range applied for remote reset of the leaving Chilled Liquid Temperature Setpoint and Current Limit Setpoint in the analogue remote mode The value should be programmed for 0 10Vdc if the remote signal is 0 10 Vdc or 0 20 mA If the remote signal is 2 10 Vdc or 4 20 mA the value must be programmed for 2 10 Vdc ul YORK 8 1 SETUP SCREEN Maran EEL i epii Fermp Opera kin ETI me p jae ji i selene To Ant Rene A wl Ls Fives Faure Paci ant ja j quid Tyre Tiamis Ermin E ai a mi Mempaga The SETUP SCREEN displays general configuration parameters as set by the microprocessor board jumpers and program switches In addition it allows the real time clock to be enabled setting of the time and date and specification of the time format Set Date Used to specify the present date the date is critical to logging system shutdowns accurately and for utilising the scheduling capabilities The day month and four digit year using leading zeroes as necessary must be entered Set Time Used to specify the present time the time is critical to logging system shutdowns accurately and for utilising the scheduling capabilities The hour and minute desired using
60. rt signal CYCLING SHUTDOWN AUTO RESTART The unit is shut down on a CYCLING shutdown The cause of the shutdown is still in effect and displayed in the SYSTEM DETAILS The unit will automatically restart when the CYCLING condition clears SAFETY SHUTDOWN MANUAL RESTART The unit is shut down on a SAFETY shutdown The cause of the shutdown is still in effect and displayed in the SYSTEM DETAILS The unit can be started after the SAFETY condition clears and the COMPRESSOR switch has been cycled to the STOP RESET O position SYSTEM PRELUBE A unit start has been initiated and the pre start lubrication is being performed The Pre lube duration is either 50 seconds or 180 seconds The standard Pre lube duration is 50 seconds The Pre lube duration is set by the microprocessor board program switch and must never be changed by anyone other than CAUTION a qualified Service Technician i gt 160 54 Ol GBO 27 SYSTEM RUN The unit is running under the condition displayed in the SYSTEM DETAILS SYSTEM COASTDOWN The unit has shutdown and the post run lubrication is being performed On electric motor drive applications the post lube duration is 150 seconds A START INHIBIT The Post lube duration is set by the microprocessor board program switch and must never be changed by anyone other than a qualified Service Technician The unit is prevented from being st
61. system shutdown The SCR trigger control uses circuitry to detect the loss of any one of the three input phases The trigger will detect the loss of a phase within one half line cycle of the phase loss This message is also displayed every time power to the VSD is removed or if the input power dips to a very low level VSD HIGH DC BUS VOLTAGE The VSD s DC link voltage is continuously monitored and if the level exceeds 745 Vdc a bus over voltage shutdown is initiated If this shutdown occurs it will be necessary to check the level of the 460 Vac applied to the drive The specified voltage range is 414 to 508 Vac If the incoming voltage is in excess of 508 Vac the voltage should be reduced to within the specified limits VSD LOGIC BOARD POWER SUPPLY This shutdown is generated by the VSD logic board and it indicates that the low voltage power supplies for the logic boards have dropped below their allowable operating limits The power supplies for the logic boards are derived from the secondary of the 120 to 24 Vac transformer which in turn is derived from the 480 to 120 Vac control power transformer This message usually means the power to the VSD has been removed il YORK VSD LOW DC BUS VOLTAGE If the DC link drops below 414 Vdc or 500 Vdc for 60 Hz applications the drive will initiate a system shutdown A common cause for this shutdown is a severe dip in the incoming power to the drive Monitor the incoming thr
62. t is gt 80 of the programmed 100 unit Full Load Amps The average is calculated as la lb lc lave 3 The imbalance is calculated as la lave Ib lave lc lave 2 lave LCSSS PHASE X SHORTED SCR Flash memory Card version C MLM 01 04 or later x 100 A shorted SCR in phase A B or C designated as X in the message has been detected by the LCSSS logic trigger board The voltage across each SCR in monitored to detect the shorted condition The shorted condition must exist for 5 seconds in order to annunciate the fault This check is disabled while the unit is running The unit can be started after the condition has been corrected and the COMPRESSOR switch is cycled to the STOP RESET O position LCSSS OPEN SCR An open SCR has been detected by the LCSSS logic trigger board The open condition must exist for 5 seconds in order to annunciate the fault The unit can be started after the condition has been corrected and the COMPRESSOR switch is cycled to the STOP RESET O position This check is disabled when the unit is shut down NOTE LCSSS PHASE ROTATION In certain applications local power supply conditions could interfere with the open SCR detection technique The check should be disabled by a qualified Service Technician using manual 160 54 M1 Flash memory Card version C MLM 01 04 or later The LCSSS logic trigger board has detected the three phase
63. the VIEW ACCESS LEVEL when the unit is powered on This screen shows the main operating values enables system access and permits further navigation to the sub screens The Login Logout key is used to enter exit the OPERATOR and SERVICE ACCESS LEVEL from the VIEW ACCESS LEVEL The Print key should be used to obtain a hard copy print of the current system status The Warning Reset key is used at OPERATOR SERVICE ACCESS LEVEL to acknowledge and reset WARNING messages displayed in yellow refer to Section 10 for details of display messages and their meaning The Message Clear key is used at SERVICE ACCESS LEVEL to clear SAFETY or CYCLING shutdown messages displayed in red and orange refer to Section 10 for details of display messages and their meaning Conderen Liquid lesmperaiure wa porate min ES ow BERTE System key see Section 2 Evaporator key see Section 3 Condenser key see Section 4 Compressor key see Section 5 Oil Sump key see Section 6 Motor key see Section 7 Setpoints key see Section 8 History key see Section 9 ud YORK 2 SYSTEM SCREEN NL ur E ilan a Midir Tier nite rc u A sima Tr Put arl repra Al KT LI 4 E oni Lal ratar Lined ewar lire La ait roa Airman rid The SYSTEM SCREEN displays pressures and temperatures for the evaporator condenser compressor and oil system Electrical load and current limit are also shown 160 54 Ol GBO THT
64. the last 5 seconds of the System Pre lube period The differential oil pressure is the difference between the output of the sump oil pressure transducer system low pressure and the output of the pump oil pressure transducer system high pressure The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position OIL HIGH DIFFERENTIAL PRESSURE The differential oil pressure increased to gt 620 5 kPa 90 PSID while the oil pump was running The differential oil pressure is the difference between the output of the sump oil pressure transducer system low pressure and the output of the pump oil pressure transducer system high pressure The unit can be restarted after the differential oil pressure decreases to lt 620 5 kPa 90 PSID and the COMPRESSOR switch is cycled to the STOP RESET O position OIL PUMP PRESSURE TRANSDUCER OUT OF RANGE The pump oil pressure transducer system high pressure is indicating a pressure that is lt 0 kPa 0 PSIG or gt 2172 kPa 315 PSIG This is outside the normal operating range of the transducer This generally indicates a defective transducer The unit can be restarted after the transducer is indicating a pressure that is within range and the COMPRESSOR switch is cycled to the STOP RESET O position OIL SUMP PRESSURE TRANSDUCER OUT OF RANGE The sump oil pressure transducer system low pressure is indicating a pressure that is lt 0
65. tic PRV operation is resumed and this message automatically clears when the motor current decreases to the ALLOW OPEN threshold Q NOTE The thresholds are different for the various motor starter applications To allow field calibration of the CM2 current module and SSS logic board special thresholds are applied when logged in at SERVICE access level An example of current limit is as follows m Unit FLA is 100 Amps Current Limit Setpoint is 50 Thresholds 50 Amps inhibit PRV open 52 Amps PRV begin closing m 51 Amps PRV stop closing m 49 Amps allow automatic PRV control ul YORK 10 2 2 Start Inhibit Messages ANTI RECYCLE XXMIN SEC The unit is inhibited from starting because the 30 minute anti recycle time has not yet elapsed Time remaining is displayed VANE MOTOR SWITCH OPEN The unit is inhibited from starting because the PRV are not fully closed MOTOR CURRENT gt 15 FLA The control panel has detected a compressor motor current of a magnitude that is gt 15 of the unit FULL LOAD AMPS for 10 continuous seconds while the unit is shutdown As long as this condition exists the oil pump is turned on Normally this indicates a failure of the motor starter control panel start circuits or motor current feedback circuits After motor current is no longer detected a SYSTEM COASTDOWN is performed The unit can be started after motor current is no longer detected the SYSTEM COAS
66. tomatically restart upon completion of SYSTEM COASTDOWN LCSSS LOW PHASE X TEMPERATURE SENSOR The LCSSS logic trigger board has detected that the temperature of the starter phase A B or C designated as X in the message Silicon Controlled Rectifier SCR module has decreased to lt 2 8 C 37 F This would generally indicate a disconnected or defective sensor If all three SCR modules are indicating a temperature of lt 2 8 C 37 F the SCR Module cooling pump turns on This is accomplished by disconnecting all three sensors e NOTE This feature allows Service Technicians to run the cooling pump while filling the cooling system by disconnecting plugs P2 P3 and P4 in the LCSSS ul YORK LCSSS RUN SIGNAL The LCSSS receives two start signals from the control panel simultaneously one via the serial communications link and one via the start relay TB6 24 in the control panel If they are not received within 5 seconds of one another a CYCLING SHUTDOWN is performed and this message is displayed This generally indicates defective wiring LCSSS INVALID CURRENT SCALE SELECTION There is an invalid compressor motor current scale jumper combination installed on the LCSSS logic trigger board J1 The jumper combination determines allowable 100 Motor FLA Setpoint range 33L FLA A 35 to 260 65 to 510 65 to 510 215 to 1050 Refer to manual 160 00 O2 for valid jumper configurations CAUTIO
67. tpoints and limits The Decimal key provides accurate entry of setpoint values The key allows entry of negative values and AM PM selection during time entry The V Check key is provided as a universal Enter or Accept key to confirm changes made The X key is provided as a universal Cancel key to reject changes made Cursor Arrow keys 4 gt A W are provided to allow movement on screens which contain a large amount of entry data In addition these keys can be used to scroll through history and event logs ul YORK Setpoint Programming Setpoint values are used to control the unit and devices connected to the system Setpoints can be numeric values such as 7 for the Leaving Chilled Liquid Temperature or an Enable or Disable function The following procedure applies when programming setpoints m Press the desired setpoint key and a dialogue box appears displaying the present value the upper and lower limits of the programmable range and the default value m When the dialogue box begins with the word ENTER the numeric keys should be used to enter the desired value Leading zeroes are not necessary If a decimal point is necessary press the key Pressing the A key sets the entry value to the default for that setpoint Pressing the W key clears the present entry The 4 key is a backspace key and causes the entry point to move back one space m If the dialogue box begins with SE
68. ty probe has decreased to lt 10 C 50 F during System Run or the last 10 seconds of System Pre lube WATCHDOG SOFTWARE REBOOT The microprocessor board s software Watchdog initiated a microprocessor reset because it detected that a part of the unit operating program was not being executed The result of this reset is a SAFETY SHUTDOWN and re initialisation of the program This generally indicates a severe power disturbance or impending microprocessor board failure The unit can be restarted after the COMPRESSOR switch is cycled to the STOP RESET O position ul YORK 10 4 1 Safety Shutdown Messages Models with MOD B Solid State Starter LCSSS SHUTDOWN REQUESTING FAULT DATA The LCSSS logic trigger board has shutdown the unit but the control panel has not yet received the cause of the fault from the LCSSS via the serial communications link The LCSSS shuts down the unit by opening the motor controller LCSSS stop contacts K1 relay located on the logic trigger board and connected between TB6 16 and TB6 53 in the control panel The microprocessor board in the control panel then sends a request for the cause of the fault to the logic trigger board over the serial communications link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages LCSSS HIGH INSTANTANEOUS CURRENT The LCS
69. ult from the LCSSS via the serial communications link The LCSSS shuts down the unit by opening the motor controller LCSSS stop contacts K1 relay located on the logic trigger board and connected between TB6 16 and TB6 53 in the control panel The microprocessor board in the control panel then sends a request for the cause of the fault to the logic trigger board over the serial communications link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages 34 160 54 Ol GBO LCSSS STOP CONTACTS OPEN See LCSSS SHUTDOWN REQUESTING FAULT DATA If the microprocessor board in the control panel does not receive the cause of a starter initiated shutdown within 20 seconds of the shutdown it is assumed it is not available and that message is replaced with this message The unit can be started when the Motor Controller LCSSS Stop Contacts close A missing interlock jumper between the LCSSS logic trigger board J1 1 and J1 12 will also produce this message NOTE Jo LCSSS POWER FAULT The LCSSS logic trigger board has detected that the compressor motor current in one or more phases has decreased to lt 10 of the motor FLA for a minimum of 1 line cycle This check is inhibited during the first 4 seconds of SYSTEM RUN and until the motor current is gt 25 of the motor FLA The unit will au

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