Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual

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

Contents

102Table 16 — Alarm and Alert Messages (cont)I. CHILLER PROTECTIVE LIMIT FAULTS (cont)*[LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., set point predefined or selected by the operator as an override, alert, oralarm condition. [VALUE] is the actual pressure, temperature, voltage, etc., at which the control tripped.ICVCFAULTSTATEPRIMARYMESSAGESECONDARYMESSAGE PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY233 PROTECTIVE LIMITHIGH MOTORTEMPERATURE233Comp Motor WindingTemp [VALUE] exceededlimit of [LIMIT]*.Check motor sensors wiring and accuracy.Check motor cooling line and spray nozzle forproper operation, or restrictions.Check for excessive starts within a short timespan.234 PROTECTIVE LIMITHIGH BEARINGTEMPERATURE234Comp Thrust BrgTemp [VALUE] exceededlimit of [LIMIT]*.Check oil heater for proper operation.Check for low oil level, partially closed oil supplyvalves, or clogged oil filter.Check oil cooler refrigerant thermal expansionvalves.Confirm that TXV bulb is secured in place andinsulated.Check for sensor wiring and accuracy.This fault can result from extended operation at lowload with low water flow to the evaporator orcondenser.235 PROTECTIVE LIMITHIGH CONDENSERPRESSURE235Condenser Pressure[VALUE] exceeded limit of[LIMIT]*.Check for high condenser water temperatures, lowwater flow, fouled tubes.Check for division plate/gasket bypass.Check for noncondensables.Check transducer wiring and accuracy.236 PROTECTIVE LIMITCOMPRESS SURGE/LOW SPEED236Compressor Surge:Check condenser water tempand flow.Check for high condenser water temperatures, lowwater flow, fouled tubes.Check for division plate/gasket bypass.Check for noncondensables.Check surge prevention parameters in OPTIONSscreen. Increase VFD Increase Step in SETUP2.Check VFD Minimum Speed in SETUP2 screen.237 PROTECTIVE LIMITSPARE SAFETYDEVICE237Spare Safety Device. Spare safety input has tripped or factory installedjumper is not present on TerminalBlock 1 (TB1).238 PROTECTIVE LIMITEXCESSIVE COMPRSURGE238Compressor Surge:Check condenser water tempand flow.Check for high condenser water temperatures, lowwater flow, fouled tubes.Check for division plate/gasket bypass.Check for noncondensables.Check surge prevention parameters in OPTIONSscreen.Check cooling tower control settings and perfor-mance to design/selection temperatures across theentire operating range of the chiller.Check cooler approach and water flow.239 PROTECTIVE LIMITTRANSDUCERVOLTAGE FAULT239Transducer VoltageRef [VALUE] exceeded limitof [LIMIT]*.Check that CCM transducer voltage reference isbetween 4.5 v and 5.5 v.Check that pressure transducers are not shorted toground. This fault is normally declared the first timean ICVC is powered up if it was downloaded withsoftware when it was not connected to a CCM.Call Carrier Service.240 PROTECTIVE LIMITLOW DISCHARGESUPERHEAT240Check for Oil in OrOvercharge of Refrigerant.Check for oil loss or excessive refrigerant. If oil levelis low, refrigerant charge may be too low resultingin ineffective oil reclaim. Excessive refrigerantcharge may cause liquid carryover into compressor.Check calibration of evaporator pressure and con-denser pressure sensors.Check calibration of compressor discharge tem-perature sensor.241 PROTECTIVE LIMIT RECTIFIEROVERCURRENT 241Rectifier OvercurrentFault: Check VFD Status. Check for high water temperatures or changes inwater flow rates.242 LOSS OFCOMMUNICATIONWITH CCM MODULE 242Loss of Communica-tion With CCM, CheckComm. Connectors.Check wiring and control power to CCM.Confirm that all CCM SW1 switches are in the“OFF” position.243 POTENTIALFREEZE-UPEVAP PRESS/TEMPTOO LOW 243Evaporator RefrigTemp [VALUE] exceededlimit of [LIMIT]*.Check for proper refrigerant charge.Check float valve operation.Check for proper fluid flow and temperature.Confirm that condenser water enters bottom rowof condenser tubes first.Check Evaporator Refrigerant Temperaturesensor.Check for division plate gasket bypass.Check for fouled tubes.244 POTENTIALFREEZE-UPCOND PRESS/TEMPTOO LOW244Condenser RefrigTemp [VALUE] exceededlimit of [LIMIT]*.Condenser water too cold or chiller shut down withbrine below 32 F in cooler so equalization tempera-ture in chiller approached 32 F.Check condenser pressure transducer.Check refrigerant charge.