Carrier 19XL specifications Chiller Protect Limit Faults, Protective Limit

Page 73

Table 9 Ð LID Primary and Secondary Messages and Custom Alarm/Alert Messages

with Troubleshooting Guides (cont)

K. CHILLER PROTECT LIMIT FAULTS

Excessive numbers of the same fault can lead to severe chiller damage. Seek service expertise.

PRIMARY MESSAGE

SECONDARY MESSAGE

ALARM MESSAGE/PRIMARY CAUSE

ADDITIONAL CAUSE/REMEDY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check discharge temperature immediately. Check sen-

PROTECTIVE LIMIT

HIGH DISCHARGE

CMPD [VALUE] exceeded limit of

sor for accuracy; check for proper condenser ¯ow and

temperature; check oil reservoir temperature. Check

TEMP

[LIMIT]*. Check discharge temperature.

 

condenser for fouled tubes or air in chiller. Check for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

proper guide vane actuator operation.

PROTECTIVE LIMIT

LOW REFRIGERANT

ERT [VALUE] exceeded limit of [LIMIT]*.

Check for proper amount of refrigerant charge; check

for proper water ¯ow and temperatures. Check for

TEMP

Check evap pump and ¯ow switch.

 

proper guide vane actuator operation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check motor temperature immediately. Check sensor

PROTECTIVE LIMIT

HIGH MOTOR

MTRW [VALUE] exceeded limit of

for accuracy. Check for proper condenser ¯ow and

[LIMIT]*. Check motor cooling and

temperature. Check motor cooling system for restric-

TEMPERATURE

 

solenoid.

tions. Check motor cooling solenoid for proper opera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tion. Check refrigerant ®lter.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check for throttled oil supply isolation valves. Valves

PROTECTIVE LIMIT

HIGH BEARING

MTRB [VALUE] exceeded limit of

should be wide open. Check oil cooler thermal expan-

sion valve. Check sensor accuracy. Check journal and

TEMPERATURE

[LIMIT]*. Check oil cooling control.

 

thrust bearings. Check refrigerant ®lter. Check for ex-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cessive oil sump level.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check power to oil pump and oil level. Check for dirty

 

 

OILPD [VALUE] exceeded limit of

®lters or oil foaming at start-up. Check for thermal

 

 

overload cutout. Reduce ramp load rate if foaming

 

 

[LIMIT]*. Check oil pump and

 

 

noted.

 

 

transducer.

PROTECTIVE LIMIT

LOW OIL PRESSURE

NOTE: This alarm is not related to pressure switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

problems.

 

 

Low Oil Pressure [OPEN]*. Check oil

Check the oil pressure switch for proper operation.

 

 

Check oil pump for proper pressure. Check for exces-

 

 

pressure switch/pump and 2C aux.

 

 

sive refrigerant in oil system.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

NO MOTOR CURRENT

CA

 

 

 

 

 

 

 

P Loss of Motor Current: Check

Check wiring: Check torque setting on solid-state

 

 

 

 

 

 

 

starter. Check for main circuit breaker trip. Check

sensor.

 

 

power supply to PSIO module.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

POWER LOSS

V

 

P Power Loss: Check voltage

 

supply.

Check 24-vdc input sensor on the SMM; adjust potenti-

 

 

PROTECTIVE LIMIT

LOW LINE VOLTAGE

V

 

P [VALUE] exceeded limit of

ometer if necessary. Check transformers to SMM.

[LIMIT]*. Check voltage supply.

Check power to PSIO module. Check distribution bus.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Consult power company.

PROTECTIVE LIMIT

HIGH LINE VOLTAGE

V

 

 

P [VALUE] exceeded limit of

[LIMIT]*. Check voltage supply.

 

 

 

 

PROTECTIVE LIMIT

LOW CHILLED

EVFL Flow Fault: Check evap pump/¯ow

 

WATER FLOW

switch.

Perform pumps Control Test and verify proper switch

 

PROTECTIVE LIMIT

LOW CONDENSER

CDFL Flow Fault: Check cond pump/

operation. Check all water valves and pump operation.

WATER FLOW

¯ow switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the high-pressure switch. Check for proper con-

 

 

High Cond Pressure [OPEN]*. Check

denser pressures and condenser water¯ow. Check for

 

 

switch, oil pressure contact, and water

fouled tubes. Check the 2C aux. contact and the oil

PROTECTIVE LIMIT

HIGH CONDENSER

temp/¯ow.

pressure switch in the power panel. This alarm is not

PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

caused by the transducer.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High Cond Pressure [VALUE]: Check

Check water ¯ow in condenser. Check for fouled

 

 

tubes. Transducer should be checked for accuracy.

 

 

switch, water ¯ow, and transducer.

 

 

This alarm is not caused by the high pressure switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

1CR AUX CONTACT

1CR

 

 

 

 

 

 

 

AUX Starter Contact Fault: Check

1CR auxiliary contact opened while chiller was run-

FAULT

1CR/1M aux contacts.

ning. Check starter for proper operation.

 

PROTECTIVE LIMIT

RUN AUX CONTACT

RUN

 

 

 

 

 

 

AUX Starter Contact Fault Check

Run auxiliary contact opened while chiller was running.

FAULT

1CR/1M aux contacts.

Check starter for proper operation.

 

PROTECTIVE LIMIT

CCN OVERRIDE STOP

CHIL

 

 

 

 

 

S

 

S CCN Override Stop while

CCN has signaled chiller to stop. Reset and restart

 

 

 

 

 

 

when ready. If the signal was sent by the LID, release

in LOCAL run mode.

 

 

the Stop signal on STATUS01 table.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

SPARE SAFETY

SRP

 

 

 

 

PL Spare Safety Fault: Check

Spare safety input has tripped or factory-installed

DEVICE

contacts.

jumper not present.

 

PROTECTIVE LIMIT

EXCESSIVE MOTOR

CA

 

 

P [VALUE] exceeded limit of

Check motor current for proper calibration. Check

[LIMIT]*. High Amps; Check guide vane

AMPS

guide vane drive and actuator for proper operation.

 

drive.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

EXCESSIVE COMPR

Compressor Surge: Check condenser

Check condenser ¯ow and temperatures. Check con-

SURGE

water temp and ¯ow.

®guration of surge protection.

 

PROTECTIVE LIMIT

STARTER FAULT

STR

 

 

 

FLT Starter Fault: Check starter

Check starter for possible ground fault, reverse rota-

for fault source.

tion, voltage trip, etc.

 

 

PROTECTIVE LIMIT

STARTER OVERLOAD

STR

 

 

 

 

 

 

FLT Starter Overload Trip: Check

Reset overloads and reset alarm. Check motor current

 

 

 

calibration or overload calibration (do not ®eld-calibrate

TRIP

amps calibration/reset overload.

 

overloads).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTIVE LIMIT

TRANSDUCER

V

 

REF [VALUE] exceeded limit of

Check transformer power (5 vdc) supply to trans-

[LIMIT]*. Check transducer power

VOLTAGE FAULT

ducers. Power must be 4.5 to 5.5 vdc.

 

supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*[LIMIT] is shown on the LID as the temperature, pressure, voltage, etc., set point prede®ned or selected by the operator as an override, alert, or alarm condition. [VALUE] is the actual temperature, pressure, voltage, etc., at which the control tripped. [OPEN] indicates that an input circuit is open.

NOTE: See Legend on page 68.

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations IntroductionRefrigeration Cycle Chiller FamiliarizationMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Cooler In/Out Temperature Sensors Take-Apart Rabbet Fit ConnectorCondenser In/Out Temperature Sensors Cooler Pressure Schrader FittingRefrigerant Motor Cooling and Oil Cooling Cycles Lubrication CycleLubrication System Unit-Mounted Solid-State Starter Optional Starting EquipmentControls DenitionsMajor PIC Components Panel Locations PIC Component PanelPressure Transducer, Typical 19XL Controls and Sensor LocationsControl and OIL Heater Voltage Selector S1 Power Panel with OptionsGeneral LID Operation and Menus FigSelect Override Operations − Example of Point Status Screen Status01Example of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Example of Set Point Screen SetpointLID Screens Description Range Units Reference Point Name Alarm HistoryExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 3 Ð STATUS03 Display Screen Example 2 Ð STATUS02 Display ScreenExample 4 Ð Setpoint Display Screen MenuExample 6 Ð LEAD/LAG Configuration Display Screen Example 5 Ð Configuration Config Display ScreenECW Control Option ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Spare Alert Enable Example 8 Ð SERVICE2 Display ScreenExample 9 Ð SERVICE3 Display Screen Menu ServiceExample 11 Ð Maintenance MAINT02 Display Screen Example 10 Ð Maintenance MAINT01 Display ScreenDischarge Temperature Bearing TemperatureExample 13 Ð Maintenance MAINT04 Display Screen Example 12 Ð Maintenance MAINT03 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page ECW Lead/Lag ControlHgbp Hot Gas BypassPage Cent Capacity Ice Build ControlPage To LOG on Example of Attach to Network Device ScreenSequence Fig START-UP/SHUTDOWN/RECYCLERecycle Restart Delta T Before Initial START-UP Using the Optional Storage Tank and PumpoutJob Data Required Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature C Ð HCFC-22 Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Ð HFC-134a Pressure Ð Temperature FTemperature Pressure Page Check Optional Pumpout Compressor Water Pip Inspect WiringMECHANICAL-TYPE Starters Check StarterBENSHAW, INC. SOLID-STATE Starter Benshaw, Inc. Solid-State Starter Power StackSet Up Chiller Control Conguration Power Up the Controls and Check the Oil HeaterLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Volt Motor Code Amps Correction Factors For 19XL Motors19XL Chiller Equalization Without PUMP- OUT Unit Charge Refrigerant into ChillerControl Test Menu Functions Tests to be Devices Tested Performed19XL Total Refrigerant Charge Refrigerant ChargesCooler SizeDry Run to Test Start-Up Sequence Initial START-UPCheck Rotation Calibrate Motor Current Check Oil Pressure and Compressor StopOperating Instructions Operator DutiesTo Stop the Chiller Plant Operating the Optional Pumpout Compressor Pumpout and Refrigerant Transfer ProceduresTransfer Refrigerant from Storage Tank to Chiller TstatTransfer the Refrigerant from Chiller to Storage Tank Chillers with Isolation ValvesTest After Service, Repair, or Major Leak Ð If General MaintenanceReturn Refrigerant to Normal Operating Conditions Guide Vane Actuator Linkage Weekly MaintenanceCheck Safety and Operating Controls Monthly Scheduled MaintenanceTo Change the OIL Inspect the Heat Exchanger Tubes Compressor Bearing and Gear MaintenOptional Pumpout System Controls Troubleshooting Guide MAINT02 MAINT01MAINT03 MAINT04Timing OUT or Timed OUT Shutdown with ON/OFF/RESET-OFFNormal or AUTO.-RESTART Recycle ShutdownAutorestart in Progress LOW Chilled Water Compressor Jumpstart and Refrigerant Protection Normal RUN with RESET, TEMPERATURE, or DemandOUT-OF-RANGE Sensor Failures Normal RUN Overrides Active AlertsLimited Protective Limit Chiller Protect Limit FaultsSpare Sensor Alert Messages Chiller AlertsDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Other PROBLEMS/MALFUNCTIONSTemperature Voltage Resistance Drop Ð Thermistor Temperature F vs Resistance/Voltage DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Module Address Control ModulesInput Options Module Processor Module Psio Fig Starter Management Module SMM FigOptions Module Switch Options Setting Module InstallationTypical Benshaw, Inc. Solid-State Starter internal View Page Page Problem Probable Causes Area of Correction Benshaw, Inc. Solid-State Starter Troubleshooting GuideRV1 SCRAdditional Data for Marine Waterboxes Heat Exchanger DataCooler CondenserCoolers Waterbox Cover WeightsCondensers 1034 kPaCompressor Weights Compressor/Motor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances Description Torque Compressor Assembly TorquesFt-lb ``ZCOM CLRComm EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic POT PMRGFR HPSTypical Wye-Delta Unit Mounted Starter Wiring Schematic Index Index Copyright 1996 Carrier Corporation

19XL specifications

The Carrier 19XL is a highly regarded commercial heating and cooling solution, designed to provide optimum performance and energy efficiency in various applications. This rooftop unit is engineered to meet the diverse needs of businesses, making it an ideal choice for those requiring reliable climate control in their facilities.

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In summary, the Carrier 19XL is an exceptional choice for commercial heating and cooling needs. With its energy-efficient features, advanced technology, and durable construction, it stands out as a reliable solution for businesses looking for sustainable climate control options.
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