Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual

Also see for AquaEdge 19XR series: Installation instructions Start-up, operation and maintenance instructions

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Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual Manual pdf 51 page image

51Table 6 — Protective Safety Limits and Control Settings (cont)Default Screen Freeze — When the chiller is in analarm state, the default ICVC display “freezes,” that is, it stopsupdating. The first line of the ICVC default screen displays aprimary alarm message; the second line displays a secondaryalarm message.The ICVC default screen freezes to enable the operator tosee the conditions of the chiller at the time of the alarm. If thevalue in alarm is one normally displayed on the default screen,it flashes between normal and reverse contrast. The ICVC de-fault screen remains frozen until the condition that caused thealarm is remedied by the operator. Use ICVC display andalarm shutdown record sheet (CL-13) to record all values fromdefault screen freeze.Knowledge of the operating state of the chiller at the time analarm occurs is useful when troubleshooting. Additional chillerinformation can be viewed on the status screens and theISM_HIST screen. Troubleshooting information is recorded inthe ALARM HISTORY table, which can be accessed from theSERVICE menu.To determine what caused the alarm, the operator shouldread both the primary and secondary default screen messages,as well as the alarm history. The primary message indicates themost recent alarm condition. The secondary message givesmore detail on the alarm condition. Since there may be morethan one alarm condition, another alarm message may appearafter the first condition is cleared. Check the ALARM HISTO-RY screen for additional help in determining the reasons for thealarms. Once all existing alarms are cleared (by pressing thesoftkey), the default ICVC display returns to normaloperation.MONITORED PARAMETER STATE LIMIT COMMENTSOVERLOAD TRIP 217 Any LOAD CURRENT PHASE > 108% for Exces-sive Time PeriodPreset Alarm, Force ACTIVE DEMANDLIMIT in MAINSTAT screenLOCKED ROTOR TRIP 218 Motor Locked Rotor Amps exceeded Preset AlarmEXCESSIVE AMPS 208 PERCENT LOAD CURRENT > 110% for 30 sec. Preset AlarmACCELERATION FAULT (FULLVOLTAGE) 203 PERCENT LOAD CURRENT >100% at 10 secafter 1CR closes (across the line)Preset Alarm, PERCENT LOAD CUR-RENT = AVERAGE LOAD CURRENT/MOTOR RATED LOAD AMPSACCELERATION FAULT(REDUCED VOLTAGE)203 PERCENT LOAD CURRENT >150% at 20 secafter 1CR closes (reduced voltage)Preset Alarm, PERCENT LOAD CUR-RENT = AVERAGE LOAD CURRENT/MOTOR RATED LOAD AMPS203 PERCENT LOAD CURRENT >100% at 45 secafter 1CR closes (reduced voltage)Preset Alarm, PERCENT LOAD CUR-RENT = AVERAGE LOAD CURRENT/MOTOR RATED LOAD AMPSAMPS NOT SENSED 202 PERCENT LOAD CURRENT < 15% w/1M/2MclosedPreset Alarm, PERCENT LOAD CUR-RENT = AVERAGE LOAD CURRENT/MOTOR RATED LOAD AMPSAMPS WHEN STOPPED 205 Amp signal > 10% w/1M/2M open preset alarmFAILURE TO STOP204 1M/2M contacts fail to open Shunt trip, if equipped205 MOTOR AMPS WHEN STOPPED ( Amps > 10%w/ 1CR OFF ) Shunt trip, if equippedSTARTS LIMIT EXCEEDED 100 More than 8 starts in 12 hours Preset Prestart AlertLOW CHILLED WATER FLOW 229CHILLED LIQUID DELTA P < EVAP FLOW DELTAP CUTOUT OR EVAPORATOR APPROACH >EVAP APPROACH ALERT AND EVAP REFRIGLIQUID TEMP < EVAP REFRIG TRIPPOINT + 1OR CALC EVAP SAT TEMP < EVAP REFRIGTRIPPOINTOptional Alarm With ICVC DSABLEFLOW DELTA P DISPLAY in SETUP1screen Optional Alarm, All limits configu-rable in SETUP1 screenLOW COND WATER FLOW 230CONDENSER LIQUID DELTA P < COND FLOWDELTA P CUTOUT OR CONDENSER APPROACH> CONDENSER APPROACH ALERT OR CON-DENSER PRESSURE > COND PRESS OVER-RIDE + 5Optional Alarm With ICVC DSABLEFLOW DELTA P DISPLAY in SETUP1screenHIGH APPROACH -EVAPORATOR 162 EVAPORATOR APPROACH > EVAP APPROACHALERT and startup completeConfigure EVAP APPROACH ALERT inSETUP1 screenCONDENSER 163 CONDENSER APPROACH > COND APPROACHALERT and startup completeConfigure COND APPROACH ALERT inSETUP1 screenVFD - HIGH VFD SPEED 245 ACTUAL VFD SPEED > VFD SPEED OUTPUT +10%Preset Alarm, Must be outside +10%threshold for 30 sec.STARTER TRANSITION - 2MSTART/RUN FAULT 201 ISM 2M aux contact not closed after 20 sec fromstart Reduced voltage starters onlyGROUND FAULT 220 GROUND FAULT CURRENT > GROUND FAULTAMPSConfigure GROUND FAULT AMPS inISM_CONF screenOPTIONAL LIMITS - SPARETEMPERATURE 158/159 SPARE TEMPERATURE > or < SPARE TEMPLIMITOptional Alarm/Alert, Confirure SPARETEMP ENABLE and SPARE TEMP LIMITin SETUP1 screenGUIDE VANE POSITION 253During startup: ACTUAL GUIDE VANE POSITIONvalue> 4% after 4 minutes of closing; After startupcomplete and running: (AGV) POSITION value >103% or < -1%; (AGV) POS voltage input < 0.045volts or > 3.25 voltsPreset AlarmHIGH CONDENSER WATERFLOW 254 CONDENSER WATER DELTA P > CONDENSERHIGH FLOW DELTA P LIMIT for more than2 minutes.Optional Alarm. Configure COND HIFLOW DEL P LIMIT in SETUP1 screenVARIABLE DIFFUSEROPERATION 247 Detects discharge pulses caused by incorrect dif-fuser position.Preset Alarm. Transducer measurespulses, no on-screen pressure reading. Nocalibration needed.RESET