Johnson Controls York YKEP Series Manual Download Page 1

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CENTRIFUGAL LIQUID CHILLER

WITH ECONOMIZER COMPRESSOR

CONTROL CENTER OPERATION

Form 160.77-02 (611)

Form 160.77-02 (1111)

R-134a

Issue Date:

November 15, 2011

MODEL YKEP

2700 - 3200 TON

LD15301a

Summary of Contents for York YKEP Series

Page 1: ...CENTRIFUGAL LIQUID CHILLER WITH ECONOMIZER COMPRESSOR CONTROL CENTER OPERATION Form 160 77 02 611 Form 160 77 02 1111 R 134a Issue Date November 15 2011 MODEL YKEP 2700 3200 TON LD15301a ...

Page 2: ... This individual shall also be familiar with and comply with all applicable governmental standards and regulations pertaining to the task in question SAFETY SYMBOLS The following symbols are used in this document to alert the reader to specific situations Indicates a possible hazardous situation which will result in death or serious injury if proper care is not taken Indicates a potentially hazard...

Page 3: ...NUMBER YKEP Installation Re assembly 160 77 N1 YKEP Unit Operation Maintenance 160 77 O1 YKEP Control Center Operation 160 77 O2 YKEP Unit Control Panel Renewal Parts 160 77 RP1 YKEP Installation Checklist 160 77 CL1 YKEP Startup Checklist 160 77 CL2 YKEP Wiring Diagram Field Connections 160 77 PW1 YKEP Wiring Diagram Unit Wiring and Field Control Modification 160 77 PW2 Liquid Cooled Solid State ...

Page 4: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 JOHNSON CONTROLS 4 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 5: ...en 42 Primary Compressor Screen 44 Primary Proximitor Calibration Screen 48 PRV Calibration Screen 50 Oil Sump Screen 52 Primary Variable Geometry Diffuser Screen 54 Primary Motor Screen EM Starter 56 Primary Motor Screen MV SSS 58 Primary Motor Screen MV VSD 60 Capacity Controls Screen with Hot Gas Fixed Speed 62 Capacity Controls Screen without Hot Gas Fixed Speed 64 Capacity Controls Screen Spe...

Page 6: ...ary Compressor Screen 44 FIGURE 26 Primary Proximity Calibration Screen 48 FIGURE 27 PrV Calibration Screen 50 FIGURE 28 Oil Sump Screen 52 FIGURE 29 Primary variable Geometry Diffuser Screen 54 FIGURE 30 Primary Motor Screen EM Starter 56 FIGURE 31 Primary Motor Screen MV SSS 58 FIGURE 32 Primary Motor Screen MV VSD 60 FIGURE 33 Capacity Controls Screen Fixed Speed with Hot Gas 62 FIGURE 34 Capac...

Page 7: ... the economizer compressor start is initiated The economizer compressor draws suction from the economizer vessel and discharges to the con denser The economizer compressor capacity is controlled to maintain the economizer pressure at a target value between the condenser and evapo rator pressures In this mode the chiller is econo mizing to gain refrigeration effect for the primary compressor and im...

Page 8: ...mperature at setpoint and the primary compressor is given a leaving chilled liquid temperature target 1 de gree F below the chiller setpoint to keep it fully loaded The economizer compressor is then con trolled to maintain the chiller programmed leav ing chilled liquid temperature setpoint using its PRV s As additional capacity is required the economizer compressor draws the economizer pressure lo...

Page 9: ... and the economizer compres sor is following its target economizer pressure as described in 2 above Atiming diagram of the compressors start sequence and shutdown is shown in Figure 3 on Page 9 Figure 3 YKEP CHILLER OPERATION SEQUENCE TIMING DIAGRAM LD16023 0 10 13 45 50 110 0 17 0 22 0 75 0 83 1 83 VANES CLOSED MAN OIL PUMP DISABLED AUTO ZEROING DIFFERENTIAL OIL PRESSURE TRANSDUCERS VANES CLOSING...

Page 10: ...ss while running Oil temperature is maintained to a target 50 F above condenser saturation temperature when the chiller is not running Electric oil heaters are operated by the control system to accomplish this At no time will the control allow the oil heaters to continue to operate with oil temperature above 160 F Oil return from the refrigerant system is accomplished with a single eductor block T...

Page 11: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 Section 1 YKEP Chiller Overview JOHNSON CONTROLS 11 1 Figure 4 YKEP CHILLER OIL MANAGEMENT SYSTEM LD16022 ...

Page 12: ...w suction pressure override the production of process water in the interests of keeping the chiller system online In cases of light load and low head the economizer compressor is dropped offline and the unit will be run with the primary compressor like a single stage YK chiller In cases of high load the economizer compressor is brought back online to perform the additional gas com pression The uni...

Page 13: ... pacity reductions are accomplished by opening the hot gas bypass valve This maintains the flow to the compressor by bypassing the discharge gas back to the compressor suction However the hot gas flow replaces the useful evaporation in the cooler since the compressor flow is at minimum Thus the net chilling capac ity is reduced albeit not efficiently The minimum suction flow or minimum com pressor...

Page 14: ...erride and anti surge conditions are satis fied the temperature control subsystem may dominate Since temperature control is the highest function as sociated with capacity control its task must be con current and compliant with all other subsystems and subsystem directives It controls the hot gas valve and pre rotation vanes in its attempt to maintain the chilled water temperature setpoint while ke...

Page 15: ...0 0 25 50 75 100 MVP2 MVP1 VANES VPD1 x VPD2 Figure 6 SYSTEM ANTI SURGE MAP LD15231 Anti Surge PRV Calculation The anti surge tuning values are based on estimated part load conditions and minimum vane signals re quired at these conditions to prevent unstable opera tion surging Compressor Differential Head Pressure Minimum PRV Signal Setpoint for Stable Operation High Head PD1 70 psid MVP1 8 Open L...

Page 16: ...Any required adjustments to the speed anti surge tuning should be performed before adjusting the PRV anti surge line Anti Surge Speed Tuning With the chiller running in automatic take the condensing conditions to the highest inlet tem perature attainable in the system without tripping on high discharge pressure Increase tower inlet temperature or reduce tower flow At the highest condensing tempera...

Page 17: ...d allows for manual adjustments to operational parameters Figure 8 CONTROL PANEL LD15303 OPERATOR INTERFACE Operators access the chiller control system through full color screens that display real time data from all control system sensor points see Figure 9 on Page 19 and are equipped with both sensor history log ging and complete alarm system trip history features YKEP CONTROL CENTER FEATURES The...

Page 18: ...lities of remote control and communications By providing a common networking protocol through the Modbus RTU YORK Chillers not only work well individually but also as a team This network protocol allows increased remote control of the chiller as well as 24 hour performance monitoring via a remote site In addition compatibility is maintained with the present network of BAS commu nications The chill...

Page 19: ... Temperature TE 102 Entering Condenser Water Temperature TE 103 Leaving Condenser Water Temperature TE 111 Evaporator Refrigerant Liquid Temperature TE 112 Primary Compressor Discharge Temperature TE 113 Economizer Compressor Discharge Temperature TE 114 Subcooled Refrigerant Liquid Temperature TE 140 Oil Sump Temperature VSDA Primary Compressor Main Oil Pump Drive Faulted SENSOR DESCRIPTION VSDB ...

Page 20: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 JOHNSON CONTROLS 20 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 21: ...description in this document will begin with a section entitled Overview which will describe the graphical elements on the screen and give a short CONTROL PANEL DISPLAY OVERVIEW The Red Lion display Figure 10 on Page 21 is high lighted by a 10 4 32k color VGA touch screen graphic display The touch screen buttons are resistive analog Eight membrane buttons are located on the left side of the panel ...

Page 22: ... with an initial access level of View This will allow the user to navigate to most screens and observe the values displayed there The user will not be allowed to change any values at the View level To change any values the user must return to the Home screen shown by default when power is applied to the sys tem and use the Login button located in the series of buttons on the display The user may a...

Page 23: ...keys are used to perform manual control func tions These may involve manual control of items such as the pre rotation vanes Other keys in this category are used to initiate stop processes such as calibrations or reports Free Cursor On screens containing many setpoints a specific blue touchscreen cell is assigned to each setpoint value At this point the blue touchscreen cell is pressed to bring up ...

Page 24: ...SUMP PRIMARY VARIABLE GEOMETRY DIFFUSER PRIMARY MOTOR EM PRIMARY MOTOR MVSSS PRIMARY MOTOR MVVSD CAPACITY CONTROLS ALARM HISTORY ECONOMIZER COMPRESSOR PRV CALIBRATE OIL SUMP ECONOMIZER VARIABLE GEOMETRY DIFFUSER ECONOMIZER MOTOR LCSSS ECONOMIZER CAPACITY ALARM HISTORY OIL SUMP CAPACITY CONTROLS CAPACITY TUNING ANTI SURGE CAPACITY LIMITS ECONOMIZER CAPACITY SETPOINTS LOG VIEWER SALES ORDER COMMUNIC...

Page 25: ...ry Motor is run ning Economizer Motor Run LED LED is illuminated when the Economizer Motor is run ning OVERVIEW The Home screen is the default display screen on the graphic display The primary values which must be monitored and controlled are shown on this screen The Home screen display depicts a visual representa tion of the chiller itself DISPLAY ONLY Primary Motor Load Displays the percentage o...

Page 26: ...E operation The START key will illu minate lighter green when the system start is enabled waiting for either a pre lube or a cycling shutdown to reset Soft Stop This key available only when the compressor is run ning initiates a Soft Shutdown A soft shutdown fully closes the pre rotation vanes prior to shutting down the compressor reducing compressor backspin at shutdown While the vanes are closin...

Page 27: ...rol and calibration are performed from here Oil Sump Advances to a detailed view of all the Primary and Economizer Oil Pump and Oil Sump parameters such as Auto Manual is performed from here control Oil Sump Temperature and Pressure Capacity Controls Advances to a detailed view of the chiller system con troller parameters This allows programming of the ca pacity tuning and the capacity limit value...

Page 28: ...perature of the oil in the sump pro vided by RTD TE 140 Oil Sump Pressure Displays the pressure in the oil sump provided by pressure transducer PE 140 OVERVIEW This screen gives a general system overview of com mon chiller parameters for the Evaporator Condenser and Economizer DISPLAY ONLY Speed Primary Compressor Motor speed when powered from an optional Variable Speed Drive Pri PRV Postion Displ...

Page 29: ... temperature of the condenser cooling liquid as it enters the condenser provided by RTD TE 102 Subcooler Temp Displays the temperature of the refrigerant at the subcooler provided by RTD TE 114 Subcooler Valve Displays the open percentage of the subcooler level con trol valve provided by actuator feedback LCV 114 LC114 Displays a proportional graphic of refrigerant liquid level in the condenser su...

Page 30: ...e Return Displays the temperature of the chilled liquid as the liq uid enters the evaporator provided by RTD TE 101 Evaporator Displays the present refrigerant pressure in the evapo rator provided by transducer PE 111 above the pres ent refrigerant temperature in the evaporator provided by RTD TE 111 PROGRAMMABLE None NAVIGATION Previous Returns the display to the previous screen Subcooler Causes ...

Page 31: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 Section 3 YKEP Control Panel Operation JOHNSON CONTROLS 31 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 32: ...hilled liquid as the liquid exits the evaporator provided by RTD TE 101 Condenser Pressure Displays the refrigerant pressure in the condenser pro vided by transducer PE 113 Evaporator Pressure Displays the present refrigerant pressure in the evapo rator provided by trasducer PE 111 MANUAL AUTO STATIONS SCREEN LD15555 Figure 19 MANUAL AUTO STATIONS SCREEN Hot Gas Valve Displays the open percentage ...

Page 33: ...or each depress hold for repeat Pri PRV Position Access Level Required OPERATOR Auto Manual This key allows auto or manual control of the primary compressor PRV When the Auto Manual key is grey the control is set to Auto and if they Auto Manual key is red the control is set to manual Open This key sends an open command to the primary com pressor PRV The primary compressor PRV will open 1 for each ...

Page 34: ... tuator LCV 114 Evaporator Pressure Displays the present refrigerant pressure in the evapo rator provided by transducer PE 111 SUBCOOLER SCREEN LD15413 Figure 20 SUBCOOLER SCREEN Condenser Saturation Temperature Displays the saturation temperature in the condenser as calculated from the voltage of the condenser pres sure transducer provided by PE 113 Subcooled Refrigerant Temperature Displays the ...

Page 35: ...otal range that Zone 1 tuning values are used For example entering 10 will define a 10 band around the setpoint where the steady state Zone 1 gains will be used Zone 1 is the steady state control loop gains when the process variable is near setpoint Zone 2 is the transient and more aggressive control loop gains when the process variable is far away from setpoint and needs to be returned to setpoin...

Page 36: ...ducer PE 111 Economizer Pressure Displays the present refrigerant pressure in the econo mizer provided by transducer PE 116 ECONOMIZER SCREEN LD15414a Figure 21 ECONOMIZER SCREEN Economizer Saturation Temperature Displays the saturation temperature in the economizer as calculated from the voltage of the economizer pres sure transducer provided by PE 116 Economizer Target Temperature Displays the t...

Page 37: ...efines Zone 1 and Zone 2 The Zone value is the Per centage of the total range that Zone 1 tuning values are used For example entering 10 will define a 10 band around the setpoint where the steady state Zone 1 gains will be used Zone 1 is the steady state control loop gains when the process variable is near setpoint Zone 2 is the transient and more aggressive control loop gains when the process var...

Page 38: ... the present setpoint to which the chiller is op erating whether controlled locally or remotely OVERVIEW This screen displays a cutaway view of the chiller evap orator All evaporator setpoints are maintained on this screen Animation of the evaporation process indicates whether the chiller is presently in a RUN condition Animation of the liquid flow indicates the chilled liq uid flow switch senses ...

Page 39: ...g chilled liquid temperature setpoint is the de fault value for this setting PROGRAMMABLE Local Chilled Setpoint Access Level Required OPERATOR This value allows the user to define the leaving chilled liquid temperature that is to be maintained by the chill er The temperature is programmable over the range of 38 0 F to 70 0 F water or variable range brine de pending on the brine concentration free...

Page 40: ...t pressure in the evapo rator provided by pressure transducer PE 111 HOT GAS SCREEN LD15415 Figure 23 HOT GAS SCREEN Condenser Saturation Temperature This display indicates the saturation temperature in the condenser as calculated from the voltage of the con denser pressure transducer provided by transducer PE 113 Discharge Temperature Displays the temperature of the refrigerant in a gas eous stat...

Page 41: ...to Manual key is grey the control is set to Auto and if they key is red the control is manual Open Access Level Required OPERATOR This key sends an open command to the Hot Gas Valve The Hot Gas Valve will increase 1 for each depress hold for repeat Close Access Level Required OPERATOR This key sends a close command to the Hot Gas Valve The Hot Gas Valve will decrease 1 for each depress hold for re...

Page 42: ...en if the Primary High Pressure Switch contacts are closed and displays a if the Primary High Pressure Switch contacts are open indicating a fault condition Primary Compressor High Discharge Pressure Cutout PSHH 113A OVERVIEW This screen displays a cutaway view of the chiller con denser All setpoints relating to the condenser side of the chiller are maintained on this screen Animation indicates co...

Page 43: ...ure Switch contacts are open Econ omizer Compressor High Discharge Pressure Cutout PSHH 113B PROGRAMMABLE None NAVIGATION Previous Returns the display to the previous screen Subcooler Causes an instant navigation to the Subcooler Screen Economizer Vessel Causes an instant navigation to the Economizer Vessel Screen Hot Gas Causes an instant navigation to the Hot Gas Screen Alarm History Causes an i...

Page 44: ...he temperature of the refrigerant vapor at discharge of the compressor before the refrigerant en OVERVIEW This screen displays a background cutaway view of the chillers primary compressor revealing the impeller and also shows all conditions associated with the com pressor The pre rotation vanes may be manually con trolled from the appropriate access level This screen also serves as a gateway to su...

Page 45: ...commanded to run provided by PWM1 Primary Motor Load Displays the motor current as a percentage of the Full Load Amps FLA value System Head Displays the chiller head pressure calculated as con denser pressure evaporator pressure Calculated Gas Flow Displays the volumetric flow rate of refrigerant through the primary compressor calculated from suction condi tions and compressor power This value is ...

Page 46: ...auses an instant navigation to view the Oil Sump Screen Primary Variable Geometry Diffuser Causes an instant navigation to view the Primary VGD Screen Primary Motor Causes an instant navigation to view the Primary Mo tor Screen Capacity Controls Causes an instant navigation to view the Capacity Con trols Screen Alarm History Causes an instant navigation to view the Alarm History Screen ...

Page 47: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 Section 3 YKEP Control Panel Operation JOHNSON CONTROLS 47 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 48: ...ion procedure OVERVIEW This screen displays a cutaway view of the chiller com pressor revealing the proximity probe sensor and pro vides the capability of calibrating the proximity probe sensor DISPLAY ONLY Thrust Prox Probe Position Displays the distance between the high speed thrust collar and the proximitor probe that is used to measure the position A positive number is in the forward direc tio...

Page 49: ...RY This button allows the tecnician to reset a tripped pri mary compressor proximitor probe under the direction from the Factory Technical Support Team NAVIGATION Previous Returns the display to the previous screen Oil Sump Causes an instant navigation to the Oil Sump Screen Alarm History Causes an instant navigation to the Alarm History Screen ...

Page 50: ... when the Primary Compressor is perform ing a calibration procedure OVERVIEW This screen displays a cutaway view of the chillers Primary and Economizer compressors revealing the pre rotation vanes and provides the capability of cali brating the pre rotation vanes for either Variable Speed Drive or Hot Gas Bypass applications DISPLAY ONLY Primary Potentiometer Displays the primary compressor Pre ro...

Page 51: ...llows the technician to define the proximitor probe maximum offset reference postion The value is the percent of the potentiometer full 0 to 10 VDC span that will be used as the operating range 100 indication Primary Calibration Access Level Required OPERATOR Start This button activates a proximitor probe calibration procedure to begin Cancel This button cancels the request for a proximitor cali b...

Page 52: ...splayed value includes offset pressure derived from auto zeroing during the system prelube If either of the transducers used to calculate this differential are out of range the display field will show XX X provided by transducer PE 140 OVERVIEW This screen displays a close up of the chiller oil sump and provides the operator with the oil sump operating levels such as pump frequency oil temperature...

Page 53: ...es when man ual pump is Enabled After ten minutes the display will revert to Disabled If a longer run time is desired the manual pump must be enabled again when the time has elapsed Manual oil pump control is only available when the chiller is stopped The Manual Pump key is not displayed during system prelube system run and system coastdown Run Pump Auto Access Level Required OPERATOR This key all...

Page 54: ...imum Stall Noise setpoint OVERVIEW This screen displays a cutaway view of the primary compressor revealing the diffuser gap and provides the capability of calibrating the diffuser gap for eliminat ing compressor stall conditions DISPLAY ONLY VGD Pressure Displays the primary compressor VGD pressure pro vided by transducer PE 149A VGD Motor Opening LED Illuminates when the Primary Compressors VGD i...

Page 55: ...quired SERVICE This key allows for programming the rate at which the VGD retracts opens Startup Access Level required SERVICE This key allows the technician to specify the VGD open retracted percentage at startup Cal Min Access Level Required SERVICE This key allows the technician to define the minimum potentiometer reading when the VGD is fully open re tracted This value is set automatically afte...

Page 56: ...ge of FLA to which the chiller will be limited during the specified pulldown limit time This value will overrride the Motor Current Limit value dur ing this time period This function is used to provide energy savings following a chiller start up OVERVIEW This screen displays all information pertaining to a Electro Mechanical Starter if equipped DISPLAY ONLY Primary Motor Run LED Illuminates when t...

Page 57: ...ired SERVICE P This key allows the technician to set the proportional gain for the demand limt I This key allows the technician to set the integral gain minutes per repeat for the demand limit D This key allows the technician to set the derivative gain for the demand limit Motor Lube Ack Access Level Required SERVICE This key allows the user to reset the runtime until next motor lube NAVIGATION Pr...

Page 58: ...communications link for troubleshooting Comm Check Errs Displays the number of cross checking errors from the SSS communications link for troubleshooting purposes OVERVIEW This screen displays all information pertaining to a Medium Voltage Solid State Starter if equipped DISPLAY ONLY Primary Motor Run LED Illuminates when the primary motor is commanded to run Full Load Amps Displays the motor curr...

Page 59: ...y savings following a chiller start up Pulldown Time Access Level Required OPERATOR This key allows the user to set a period of time for which the pulldown demand limit will be in effect after the chiller starts Motor FLA Access Level Required SERVICE This key allows the technician to specify the maximum amps at which the motor can operate Motor LRA Access Level Required SERVICE This key allows th...

Page 60: ...rter Input Voltage Displays the average of the 3 phase input voltage to the MV VSD provided by the MV VSD OVERVIEW This screen displays all information pertaining to a Medium Voltage Variable Speed Drive if equipped DISPLAY ONLY Primary Motor Run LED Illuminates when the primary motor is commanded to run VSD Cooling Fans Output LED Illuminates when the VSD cooling fans are command ed to run Precha...

Page 61: ...f FLA When the motor reaches this value the pre rotation vanes will NOT be permitted to open further If the motor current rises above this value the pre rotation vanes will close to reduce the current to this value Pulldown Demand Limit Access Level Required OPERATOR This key allows the user to specify the current limit as a percentage of FLA to which the chiller will be limited during the specifi...

Page 62: ...nded to open during startup OVERVIEW This screen displays the pertinent parameters associat ed with capacity control in relation to Leaving Chilled Liquid temperature current and pressure overrides and anti surge control DISPLAY ONLY TC 100 Leaving Temperature Control Leaving Chilled Liquid Temp Displays the temperature of the chilled liquid as it leaves the evaporator provided by RTD TE 100 Local...

Page 63: ... Control Displays the control percentage of the Hot Gas Bypass Valve HGV Control Displays the open percentage of the Hot Gas Bypass Valve provided by Hot Gas Valve Actuator TCV 100C Hot Gas Ramp Displays the percentage that the Hot Gas Valve is lim ited to during startup PROGRAMMABLE None NAVIGATION Capacity Tuning Access Level Required OPERATOR Causes an instant navigation to the Capacity Tuning ...

Page 64: ...ommanded to open OVERVIEW This screen displays the pertinent parameters associat ed with capacity control in relation to Leaving Chilled Liquid temperature current and pressure overrides and anti surge control DISPLAY ONLY TC 100 Leaving Temperature Control Leaving Chilled Liquid Temp Displays the temperature of the chilled liquid as it leaves the evaporator provided by RTD TE 100 Local Displays t...

Page 65: ...A Open LED Illuminated when the primary compressor PRV is opening Close LED Illumintated when the primary compressor PRV is closing PROGRAMMABLE None NAVIGATION Capacity Tuning Access Level Required OPERATOR Causes an instant navigation to the Capacity Tuning Screen Capacity Limits Access Level Required OPERATOR Causes an instant navigation to the Capacity Limits Screen Economizer Capacity Access ...

Page 66: ...es are commanded to open during startup OVERVIEW This screen displays the pertinent parameters associat ed with capacity control in relation to Leaving Chilled Liquid temperature current and pressure overrides and anti surge control DISPLAY ONLY TC 100 Leaving Temperature Control Leaving Chilled Liquid Temp Displays the temperature of the chilled liquid as it leaves the evaporator provided by RTD ...

Page 67: ...inated when the primary compressor PRV is opening Close LED Illumintated when the primary compressor PRV is closing Hot Gas Control Displays the control percentage of the Hot Gas Bypass Valve HGV Control Displays the open percentage of the Hot Gas Bypass Valve provided by TCV 100C Hot Gas Ramp Displays the percentage that the Hot Gas Valve is lim ited to during startup PROGRAMMABLE None NAVIGATION...

Page 68: ...are commanded to open during startup OVERVIEW This screen displays the pertinent parameters associat ed with capacity control in relation to Leaving Chilled Liquid temperature current and pressure overrides and anti surge control DISPLAY ONLY TC 100 Leaving Temperature Control Leaving Chilled Liquid Temp Displays the temperature of the chilled liquid as it leaves the evaporator provided by RTD TE ...

Page 69: ...alc Displays the calculated minimum vane position anti surge value TV 100A PRV Displays the open percentage of the Pre rotational Vanes provided by Primary Compressor PRV Pot ZE 100A Open LED Illuminated when the primary compressor PRV is opening Close LED Illumintated when the primary compressor PRV is closing Hot Gas Control Displays the control percentage of the Hot Gas Bypass Valve HGV Control...

Page 70: ...ram the integral gain minutes per repeat for the speed D Allows the technician to program the derivative gain for the speed OVERVIEW This screen displays the pertinent tuning parameters associated with primary capacity control in relation to Leaving Chilled Liquid Temperature and primary de mand limits DISPLAY ONLY TC 100 Leaving Chilled Controller PV Displays the Leaving Chilled Controller Proces...

Page 71: ...RATOR Allows the user to specify the current limit value as a percentage of FLA to which the chiller will be limited during the specified pulldown limit time This value will override the Motor Current Limit value during this time period This function is used to provide energy savings following chiller start up P Allows the technician to program the proportional gain for the primary compressor dema...

Page 72: ...rovides access to the Primary compressor anti surge control threshold setpoints It consists of a Pre rotation vane PRV control section and an option al speed control section for compressors employing a Variable Speed Drive VANE ANTI SURGE MAP The vane anti surge map defines the minimum PRV position permitted for surge free compressor opera tion as a function of differential pressure between the co...

Page 73: ...condition MSP1 Minimum speed to avoid surge at the pressure differen tial defined by SPD1 MSP2 Minimum speed to avoid surge at the pressure differen tial defined by SPD2 MSP3 Minimum speed to avoid surge at the pressure differen tial defined by SPD3 MSP4 Minimum speed to avoid surge at the pressure differen tial defined by SPD4 MSP5 Minimum speed to avoid surge at the pressure differen tial define...

Page 74: ...ot Gas P Allows the user to program the proportional gain for the Hot Gas Valve OVERVIEW This screen displays the pertinent tuning parameters associated with primary compressor capacity limits in relation to Low Suction Override and High Discharge Override DISPLAY ONLY PC 111 Low Suction Override PV Displays the Low Suction Override Process Variable PV pressure CV Displays the Low Suction Override...

Page 75: ...High Discharge Over ride Pressure Setpoint P Allows the user to program the proportional gain for the High Discharge Override I Allows the user to program the integral gain minutes per repeat for the High Discharge Override D Allows the user to program the derivative gain for the High Discharge Override NAVIGATION Previous Causes an instant return to the previous screen Capacity Tuning Access Leve...

Page 76: ...e temperature of the refrigerant in a gaseous state at discharge of the compressor before the refriger ant enters the condenser provided by RTD TE 113 OVERVIEW This screen displays a background cutaway view of the chillers Economizer Compressor revealing the impeller and also shows all conditions associated with the compressor The pre rotation vanes may be manu ally controlled from the appropriate...

Page 77: ... as condenser pressure minus economizer pressure System Head Displays the chiller head pressure calculated as con denser pressure evaporator pressure evaporator pres sure Economizer Runtime Displays the most recent runtime for the Economizer Compressor PROGRAMMABLE Auto Manual Access Level Required OPERATOR This key returns the Pre rotational Vane control to au tomatic or manual mode Open Manual A...

Page 78: ...hase A B C Displays the 3 phase input line current as measured and transmitted from the starter Temperature Phase A B C Displays the temperatures of the starter Silicon Con trolled Rectifier assemblies per phase OVERVIEW This screen displays all information pertaining to the Liquid Cooled Solid State Starter for the Economizer compressor DISPLAY ONLY Economizer Motor Run LED Illuminates when the e...

Page 79: ...can operate Voltage Range Access Level Required SERVICE This key allows the technician to specify the nominal line voltage range for or Disable overvoltage and un dervoltage shutdown protection The thresholds are set based on the nominal line voltage range Reset kWh Access Level Required SERVICE This key allows the technician to reset the cumulative kWh Motor Lube Ack Access Level Required SERVICE...

Page 80: ...en displays the pertinent parameters associat ed with the Economizer Capacity Control in relation to economizer saturation temperature and leaving chilled liquid temperature in boost mode and demand limit and anit surge overrides This screen also provides a means for a Service Technician to control the Econo mizer Compressor mode The Economizer compressor will be automatically brought online and d...

Page 81: ...re Control PV Displays Economizer Saturation Temperature Control Process Variable SP Displays the Economizer Temperature Setpoint IC 160B Demand Limit Motor FLA Displays the percentage of FLA Full Load Amps the Economizer Motor is currently drawing Limit SP Displays the Demand Limit Setpoint in percentage of Full Load motor current Min Start Displays the minimum PRV position commanded at the time ...

Page 82: ...s a convenient location for pro gramming the most common setpoints involved in the chiller control This screen also serves as a gateway to a sub screen for defining the setup of general system parameters DISPLAY ONLY HMI Rev Displays the current software version of the system graphics interface Ladder Rev Displays the current revision level to the ladder logic Remote SP Displays how Remote Setpoin...

Page 83: ...emote Start Allows the operator to select how the Remote Start Command is communicated Local Chilled Setpoint Allows the operator to program the Local Chilled Setpoint Restart Allows the operator to program the Chilled Liquid Re start temperature NAVIGATION Previous Returns the display to the previous screen Logviewer Causes an instant navigation to the Logviewer Screen Sales Order Causes an insta...

Page 84: ... This screen is available for view of the displayed set tings pertinent to the chiller configuration These pa rameters are critical to the operation of the control sys tem and are set at the Factory level before shipment and should not be changed FACTORY SETUP SCREEN LD15403 Figure 44 FACTORY SETUP SCREEN ...

Page 85: ...FORM 160 77 O2 ISSUE DATE 11 15 2011 Section 3 YKEP Control Panel Operation JOHNSON CONTROLS 85 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 86: ...dress of the Chiller WAN network port WAN Mask DisplaysthesubnetmaskoftheChillerWANnetworkport OVERVIEW This screen allows definition of the configurable com munications parameters of the Modbus RTU port The Modbus RTU Primary Starter Motor Monitor Port values are displayed here but are only configurable from the Service Level and should only be modified by a qualified YORK service technician The ...

Page 87: ...s RTU port is configurable for NODE Num ber and Baud Rate Refer to YKEP Wiring Diagram Unit Wiring and Field Control Modification Form 160 77 PW2 for wiring details NODE Define the node number for use with the Modbus port BAUD Define the baud rate of communication via the Modbus port DATA BITS Displays the number of data bits for the Modbus RTU RS 485 Port STOP BITS Displays the number of stop bit...

Page 88: ...is screen allows the user to browse through the his torical listings of system faults In order to get a more thorough reporting of the active system fault condi tions move to the sub screen Active Alarms DISPLAY ONLY Date Time Status Fault Displays the date and time the alarm ocurred and its current status Previous Returns the display to the previous alarm Next Returns the display to the next alar...

Page 89: ...urns the display to the previous screen Home Causes an instant navigation to the Home Screen screen OVERVIEW This screen allows the user to browse through the ac tive system alarms DISPLAY ONLY Active Alarms Displays the date time and active system fault PROGRAMMABLE ACTIVE ALARMS SCREEN LD15408 Figure 47 ACTIVE ALARMS SCREEN ...

Page 90: ...p This screen allows access to the last 5 system trips In or der to compare the time details of the active system fault conditions move to the Alarm History Screen and scroll through the time the shutdown ocurred DISPLAY ONLY Trip Date Displays the Month Day Year at which the trip oc curred Trip Time Displays the actual time the trip occurred Trip 1 Trip 5 Each key displays the peticular historica...

Page 91: ...le by and arrow keys to cancel and to accept Trend Pen Assignments are shown in Table 2 on Page 92 NAVIGATION Previous Returns the display to the previous screen OVERVIEW This screen displays as many as 8 Operator selected parameters for trending The operator assigns a spe cific parameter to a designated Pen with each being represented by a different color DISPLAY ONLY Allows the operator to insta...

Page 92: ... Temperature 26 Compressor Oil Sump Temperature 27 Primary Motor VSD speed in Hertz 28 Five Volt Supply 29 Hardwired Remote Demand Limit Setpoint 30 PRI VGD Pressure Sensor Intermediate Pressure 31 PRI VGD Stall Noise Level 32 PRI VGD Position 33 SEC VGD Pressure Sensor 34 SEC VGD Stall Noise Level 35 SEC VGD Position 36 Hot Gas Bypass Valve 37 Subcooler Variable Orifice Valve 38 Economizer Variab...

Page 93: ...are 10008 N13 0 7 7 DI_LS_VSDOilPumpFault 10009 N13 0 8 8 DI_HS_VSDOilPumpFault 10010 N13 0 9 9 DI_HSProxSwitch 10011 N13 0 10 10 DI_REMOTESTARTSTOP 10012 N13 0 11 11 DI_HardwireSafetyRelay 10013 N13 0 12 12 DI_LS_HighPressCutout 10014 N13 0 13 13 DI_HS_HighPressCutout 10015 N13 0 14 14 spare 10016 N13 0 15 15 spare 10017 N13 1 0 16 DO_OilHeater 10018 N13 1 1 17 DO_LSMtrStarter 10019 N13 1 2 18 DO...

Page 94: ...tatus 1 run 10063 N13 3 14 62 B_HSCompMtrIntlk Secondary Economizer motor Status 1 run 10064 N13 3 15 63 IF_Units 0 English PSI F 1 Metric BAR C 30200 F10 0 0 AI_IT160A Scaled PRIMARY Motor Current 30202 F10 1 1 AI_IT160B Scaled ECONOMIZER MOTOR Current 30204 F10 2 2 AI_PE111 Scaled Evaporator Refrig Pressure 30206 F10 3 3 AI_PE113 Scaled Condenser Refrig Pressure 30208 F10 4 4 AI_PE116 Scaled Eco...

Page 95: ...aled SEC VGD Stall Noise Level 30270 F10 35 35 C_HS_VGDPosition SEC VGD Position 30272 F10 36 36 AO_TCV100C Scaled Hot Gas Bypass Valve 30274 F10 37 37 AO_LCV114 Scaled Subcooler Variable Orifice Valve 30276 F10 38 38 AO_LCV116 Scaled Economizer Variable Orifice Valve 30278 F10 39 39 reserved reserved 30280 F10 40 40 PC_141A Cv PRI Comp VS Oil Pump Drive Control 30282 F10 41 41 PC_141B Cv SEC Comp...

Page 96: ...ours 30458 F11 29 29 C_HS_Runtime Secondary Economizer Compressor Runtime in Hours 30460 F11 30 30 PID_LC114 SP Subcooler Level Setpoint 30462 F11 31 31 YIAR_LS Time2NextStart_ Hour Antirecycle time to next start in hours 30464 F11 32 32 YIAR_LS Time2NextStart_ Min Antirecycle time to next start in minutes 10100 N12 0 0 0 ALM_ReplaceBattery WARNING REPLACE PLC BATTERY 10101 N12 0 1 1 ALM_HardwireN...

Page 97: ...P_LSMotorIntlk PRIMARY MOTOR STARTER INTERLOCK FAULT 10136 N12 2 4 36 TRIP_LS_ExcessStarts PRIMARY MOTOR EXCESS STARTS IN 24 HOUR PERIOD 10137 N12 2 5 37 TRIP_LSStarterFault PRIMARY MOTOR STARTER FAULT CONTACT 10138 N12 2 6 38 TRIP_LS_HighPressCu tout PRIMARY HIGH PRESSURE CUTOUT 10139 N12 2 7 39 TRIP_HS_HighPressCu tout SECONDARY HIGH PRESSURE CUTOUT 10140 N12 2 8 40 TRIP_ChilledFlow LOW CHILLED ...

Page 98: ...4 68 TRIP_HS_MotorLube TRIP ECONOMIZER MOTOR LUBRICATION RE QUIRED 10169 N12 4 5 69 ALARM SPARE W4 B5 10170 N12 4 6 70 ALARM SPARE W4 B6 10171 N12 4 7 71 ALARM SPARE W4 B7 10172 N12 4 8 72 ALARM SPARE W4 B8 10173 N12 4 9 73 ALARM SPARE W4 B9 10174 N12 4 10 74 ALARM SPARE W4 B10 10175 N12 4 11 75 ALARM SPARE W4 B11 10176 N12 4 12 76 ALARM SPARE W4 B12 10177 N12 4 13 77 ALARM SPARE W4 B13 10178 N12 ...

Page 99: ...117 AI_LE116 AL ECONOMIZER LEVEL SENSOR LOW 10218 N12 7 6 118 AI_LE116 ALL ECONOMIZER LEVEL SENSOR VERY LOW 10219 N12 7 7 119 AI_LE116 AH ECONOMIZER LEVEL SENSOR HIGH 10220 N12 7 8 120 AI_LE116 AHH ECONOMIZER LEVEL SENSOR VERY HIGH 10221 N12 7 9 121 AI_PE111 OOR EVAPORATOR PRESSURE OUT OF RANGE 10222 N12 7 10 122 AI_PE111 AL EVAPORATOR PRESSURE LOW 10223 N12 7 11 123 AI_PE111 ALL EVAPORATOR PRESSU...

Page 100: ...ALL REMOTE HARDWIRED SETPOINT OFFSET VERY LOW 10264 N12 10 4 164 AI_RST100 AH REMOTE HARDWIRED SETPOINT OFFSET HIGH 10265 N12 10 5 165 AI_RST100 AHH REMOTE HARDWIRED SETPOINT OFFSET VERY HIGH 10266 N12 10 6 166 AI_RST160 OOR REMOTE HARDWIRED DEMAND OFFSET OUT OF RANGE 10267 N12 10 7 167 AI_RST160 AL REMOTE HARDWIRED DEMAND OFFSET LOW 10268 N12 10 8 168 AI_RST160 ALL REMOTE HARDWIRED DEMAND OFFSET ...

Page 101: ...GH 10306 N12 12 14 206 AI_TE114 OOR SUBCOOLER DROPLEG TEMP OUT OF RANGE 10307 N12 12 15 207 AI_TE114 AL SUBCOOLER DROPLEG TEMP LOW 10308 N12 13 0 208 AI_TE114 ALL SUBCOOLER DROPLEG TEMP VERY LOW 10309 N12 13 1 209 AI_TE114 AH SUBCOOLER DROPLEG TEMP HIGH 10310 N12 13 2 210 AI_TE114 AHH SUBCOOLER DROPLEG TEMP VERY HIGH 10311 N12 13 3 211 AI_TE140 OOR OIL SUMP TEMP OUT OF RANGE 10312 N12 13 4 212 AI_...

Page 102: ... LOW 10349 N12 15 9 249 AI_ZE149B AH SECONDARY VGD POSITION HIGH 10350 N12 15 10 250 AI_ZE149B AHH SECONDARY VGD POSITION VERY HIGH 10351 N12 15 11 251 ZC_142A Prox_AL PRIMARY COMPRESSOR THRUST REVERSE ALARM 10352 N12 15 12 252 ZC_142A Prox_ALL PRIMARY COMPRESSOR THRUST REVERSE TRIP 10353 N12 15 13 253 ZC_142A Prox_AH PRIMARY COMPRESSOR THRUST FORWARD ALARM 10354 N12 15 14 254 ZC_142A Prox_AHH PRI...

Page 103: ...SS_HS Alarms 1 0 SEC SSS PHASE B INHIBIT HIGH TEMPERATURE 10389 N12 18 1 289 SSS_HS Alarms 1 1 SEC SSS PHASE C INHIBIT HIGH TEMPERATURE 10390 N12 18 2 290 SSS_HS Alarms 1 2 SEC SSS PHASE A HIGH TEMPERATURE 10391 N12 18 3 291 SSS_HS Alarms 1 3 SEC SSS PHASE B HIGH TEMPERATURE 10392 N12 18 4 292 SSS_HS Alarms 1 4 SEC SSS PHASE C HIGH TEMPERATURE 10393 N12 18 5 293 SSS_HS Alarms 1 5 SEC SSS PHASE A O...

Page 104: ...3 PC_141B PDSHHZero SECONDARY OILPRESSURE SENSORS WILLNOT ZERO 10434 N12 20 14 334 ALARM SPARE W21 B14 10435 N12 20 15 335 ALARM SPARE W21 B15 10436 N12 21 0 336 SSS_LS Alarms 0 0 PRI SSS FAULT spare word0 bit0 10437 N12 21 1 337 SSS_LS Alarms 0 1 PRI SSS FAULT spare word0 bit1 10438 N12 21 2 338 SSS_LS Alarms 0 2 PRI SSS FAULT PHASE LOSS 10439 N12 21 3 339 SSS_LS Alarms 0 3 PRI SSS FAULT STARTER ...

Page 105: ... 9 377 SSS_LS Alarms 2 9 PRI SSS SPARE W2 B9 10478 N12 23 10 378 SSS_LS Alarms 2 10 PRI SSS SPARE W2 B10 10479 N12 23 11 379 SSS_LS Alarms 2 11 PRI SSS SPARE W2 B11 10480 N12 23 12 380 SSS_LS Alarms 2 12 PRI SSS SPARE W2 B12 10481 N12 23 13 381 SSS_LS Alarms 2 13 PRI SSS SPARE W2 B13 10482 N12 23 14 382 SSS_LS Alarms 2 14 PRI SSS SPARE W2 B14 10483 N12 23 15 383 SSS_LS Alarms 2 15 PRI SSS SPARE W2...

Page 106: ...CHARGE DC BUS VOLTAGE IMBALANCE BL 10516 N12 26 0 416 VSD_LS Alarms 2 0 PRI VSD FAULT SINGLE PHASE INPUT POWER 10517 N12 26 1 417 VSD_LS Alarms 2 1 PRI VSD FAULT CONTACTOR FAULT 10518 N12 26 2 418 VSD_LS Alarms 2 2 PRI VSD FAULT LOSS OF COOLING FAN 10519 N12 26 3 419 VSD_LS Alarms 2 3 PRI VSD FAULT 105 MOTOR OVERLOAD CURRENT 10520 N12 26 4 420 VSD_LS Alarms 2 4 PRI VSD FAULT LOW DC BUS VOLTAGE 105...

Page 107: ...iquid Level 40213 N7 13 13 BAS_INT_Analogs 13 PRI Comp SEC Thrust Bearing Probe Gap 40214 N7 14 14 BAS_INT_Analogs 14 System Kilowatts 40215 N7 15 15 BAS_INT_Analogs 15 PRIMARY PRV Position 40216 N7 16 16 BAS_INT_Analogs 16 SECONDARY PRV Position 40217 N7 17 17 BAS_INT_Analogs 17 Hardwired Remote Chilled Water Setpoint 40218 N7 18 18 BAS_INT_Analogs 18 Chilled Water Out Temperature 40219 N7 19 19 ...

Page 108: ...15 BAS_INT_Calculated 15 LSR2 40416 N9 16 16 BAS_INT_Calculated 16 LSR3 40417 N9 17 17 BAS_INT_Calculated 17 LSR4 40418 N9 18 18 BAS_INT_Calculated 18 HSR1 40419 N9 19 19 BAS_INT_Calculated 19 HSR2 40420 N9 20 20 BAS_INT_Calculated 20 HSR3 40421 N9 21 21 BAS_INT_Calculated 21 HSR4 40422 N9 22 22 BAS_INT_Calculated 22 SS1 40423 N9 23 23 BAS_INT_Calculated 23 refrigerant pressure when chilled liquid...

Page 109: ...s been initiated and the pre start pri mary compressor lubrication is being performed A TIME REMAINING countdown will begin in the sys tem status bar The prelube duration is configured from the Oil Sump Screen The prelube duration must never be changed by anyone other than a qualified service technician System Running The chiller is running both the Primary and Econo mizer compressors are operatin...

Page 110: ...n those listed above occur the soft shutdown is terminated The control center will then perform a SYSTEM COASTDOWN WARNING MESSAGES WARNING Replace PLC Battery The PLC measures the battery voltage and activated this message when there is approximately 2 weeks of battery life remaining Always replace the PLC memory bat tery with the power ON or the control application will be lost WARNING Hardwire ...

Page 111: ...D This is generally indicates a defec tive sensor shorted or loose wire Leaving Chilled Liquid Temp Low The Leaving Chilled Liquid Temperature has de creased This message is generated as a warning of an impending cycle off if the leaving chilled liquid tem perature continues to lower to the programmed Shut down Temperature the unit will cycle off Leaving Chilled Liquid Temp Very Low The Leaving Ch...

Page 112: ...s than 60 Ohm or greater than 160 Ohm This is outside the normal operating range of the temperature RTD This is generally indi cates a defective sensor shorted or loose wire Secondary Discharge Temp Low This message is generated when there is a warning of low discharge superheat Secondary Discharge Temp Very Low This message is generated when there is a danger of a defective sensor Secondary Disch...

Page 113: ...es to less than 120 0 PSIG and the unit reset button pressed Low Chilled Water Flow This message is displayed if the evaporator water flow is less than the recommended minimum and there is a danger of freezing The unit has tripped TRIP Primary Motor Lubrication Required This message is generated to notify the motor is requir ing lubrication within 200 hours TRIP Communications Fault with Slot 1 Sl...

Page 114: ...Brine shutdown threshold is programmed at the YORK Factory The chiller can be started after the evaporator pressure increases to the restart threshold Evaporator Pressure Very Low The evaporator pressure as sensed by the Evapora tor Transducer has decreased to the Safety shutdown threshold trip of 25 PSIG For water cooling applica tions the safety shutdown threshold is a fixed value for the respec...

Page 115: ...f an impending trip of 180 PSIG Secondary Stall Sensor Very High The Secondary Stall Sensor has exceeded 200 PSIG Primary PRV Position Out of Range The Primary PRV Position Sensor is indicating a volt age that is less than 0 V or greater than 4 5 V This is outside the normal operating range of the position sen sor This is generally indicates a miscalibrated sensor loose or shorted wiring Secondary...

Page 116: ... calibration procedure is still in the pro cess of calibration Primary Compressor Proximitor Calibration Out of Range The Primary Compressor Prox Probe is indicating a voltage that is less than 0 4 V or greater than 4 4 V This is outside the normal operating range of the Primary Compressor Prox Probe This is generally indicates a defective proximity probe damaged coaxial cable or poor connection b...

Page 117: ...energize after the LCSSS has power SEC SSS Power Fault The liquid cooled solid state starter logic trigger board has detected that the compressor motor current in one or more phases has decreased to less than 10 of the FLA for a minimum of one 1 line cycle This check is inhibited during the first four 4 seconds of chiller operation and until the motor current is above 25 of the Job FLA SEC SSS Run...

Page 118: ...ontrolled Rectifier SCR in phase A B or C designated as X in the message has been detected by the Liquid Cooled Solid State Starter Logic Trigger Board The voltage across each SCR in monitored to detect the shorted condition The shorted condition must exist continuously for 5 seconds in or der to annunciate the fault This check is disabled while the chiller is running In order to initiate restart ...

Page 119: ...wn is performed This same shutdown is performed if the Liquid Cooled Solid State Starter does not receive a response from the con trol center after 3 consecutive read attempts to commu nicate with the Control Center after INITIALIZATION has been successfully completed The Control Center attempts to establish communications until successful Press the RESET button to clear the message Primary Oil Pu...

Page 120: ...er disconnect or isolation switch This micro switch advises the controller board of the status of this isolation switch If this switch provides indica tion that the main power disconnect was opened while the motor was running this fault will be generated Pri SSS Fault Power Fault Undercurrent one of the phases has dropped below 10 FLA for 2 cycles or Motor Current dropped to below 25 FLA for 1 2 s...

Page 121: ...r status Pri SSS Fault Ground Fault The ground fault current has been determined to have exceeded 50 of motor FLA for 3 seconds There is no device measuring current to ground This is done by looking at all three motor currents and calculating the instantaneous sum of all three Recognize that at any given time the current passing in the direction toward the motor must equal any currents coming back...

Page 122: ...X denotes the Power cell phase location A B or C and Y denotes the location of the cell within that phase U upper or L lower Pri VSD Fault Power Transformer High Temp The input power transformer will be supplied with three temperature sensor Klixons wired in series set to trip at 200 F Hammond as transformer manufac turer or 190 F Hitran as transformer manufacturer If any one of the three input po...

Page 123: ... Motor Over current Trip 2300 Volt 60Hz Model Peak Instantaneous Motor Over current Trip 3300 Volt 50 60Hz Models Peak Instantaneous Motor Over current Trip 4160 Volt 60Hz 6600 Volt 50 60Hz Models 500 250 182 145 600 301 219 173 700 366 257 203 800 401 292 231 900 471 329 261 1000 523 364 289 1250 653 455 362 1500 784 548 434 1750 915 639 506 2000 1022 728 579 2250 1153 805 639 2500 1309 912 723 T...

Page 124: ...Fault or if the auxiliary contact for the input disconnect switch is not in the proper state Input Contactor Open Fault the drive initiates a safety shutdown and the system control panel displays the mes sage PRI VSD FAULT CONTACTOR FAULT Pri VSD Fault Loss of Cooling Fan The unit contains dedicated fan motor thermal over loads for each of the cooling fan motors used within the drive The drive als...

Page 125: ... Although this message can be generated by either run signal being missing it is almost always due to the loss of the hardwired signal This is because the loss of the digital communications most likely will cause an ini tialization failure or serial communications message Pri VSD Fault Interlock Fault All doors that provide access to the areas that contain medium voltage are either mechanically in...

Page 126: ...Pri VSD Write Fail This message is generated when the checksum test failed at power up Check to see that the proper pro gram is loaded to the controller board Press the RE SET button to clear the message Pri VSD Read Trip After communications have been established if the Control Center does not receive a reply within 3 con secutive read attempts a shutdown is performed This same shutdown is perfor...

Page 127: ...1 Liters Second l s Length Feet ft 304 8 Meters m Inches in 25 4 Millimeters mm Weight Pounds lbs 0 4538 Kilograms kg Velocity Feet Second fps 0 3048 Meters Second m s Pressure Drop Feet of Water ft 2 989 Kilopascals kPa Pounds Square Inch psi 6 895 Kilopascals kPa Table 8 SI METRIC CONVERSION TEMPERATURE To convert degrees Fahrenheit F to degrees Celsius C subtract 32 and multiply by 5 9 or 0 555...

Page 128: ...ia USA 17405 1592 Subject to change without notice Printed in USA Copyright by Johnson Controls 2011 ALL RIGHTS RESERVED Form 160 77 O2 1111 Issue Date November 15 2011 Supersedes 160 77 O2 611 800 861 1001 www johnsoncontrols com ...

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