Carrier 17EX specifications Chiller Protect Limit Faults

Page 90

Table 12 Ð LID Primary and Secondary Messages and Custom Alarm/Alert Messages

with Troubleshooting Guides (cont)

L. 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

PROTECTIVE LIMIT

HIGH DISCHARGE TEMP

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

Check discharge temperature immediately. Check sen-

 

 

Check discharge temperature.

sor for accuracy; check for proper condenser ¯ow and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

temperature; check oil reservoir temperature. Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condenser for fouled tubes or air in chiller. Check for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

proper guide vane actuator operation.

PROTECTIVE LIMIT

LOW REFRIGERANT TEMP

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

Check for proper amount of refrigerant charge; check

 

 

Check evap pump and ¯ow switch.

for proper water ¯ow and temperatures. Check for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

proper guide vane actuator operation.

PROTECTIVE LIMIT

HIGH MOTOR TEMPERATURE

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

Check motor temperature immediately. Check sen-

 

 

Check motor cooling and solenoid.

sor for accuracy. Check for proper condenser ¯ow and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

temperature. Check motor cooling system for restric-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tions. Check motor cooling solenoid for proper opera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tion. Check refrigerant ®lter.

PROTECTIVE LIMIT

HIGH BEARING TEMPERATURE

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

Check for throttled oil supply isolation valves. Valves

 

 

Check oil cooling control.

should be wide open. Check oil cooler thermal ex-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pansion valve. Check sensor accuracy. Check jour-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nal and thrust bearings. Check refrigerant ®lter. Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for excessive oil sump level.

PROTECTIVE LIMIT

LOW OIL PRESSURE

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

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

 

 

Check oil pump and transducer.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

load cutout. Reduce ramp load rate if foaming noted.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: This alarm is not related to pressure switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

problems.

 

 

Low Oil Pressure [OPEN]*. Check oil

Check the oil pressure switch for proper operation.

 

 

pressure switch/pump and 2C aux.

Check oil pump for proper pressure. Check for ex-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cessive 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.

 

 

sensor.

Check for main circuit breaker trip. Check power sup-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ply to PSIO module.

PROTECTIVE LIMIT

POWER LOSS

V

 

 

P Power Loss: Check voltage

 

 

 

supply.

Check 24-vac input on the SMM (terminals 23 and

PROTECTIVE LIMIT

LOW LINE VOLTAGE

V

 

 

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

24). Check transformers to SMM. Check power to PSIO

 

 

Check voltage supply.

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 WATER FLOW

EVFL Flow Fault: Check evap pump/¯ow

Perform pumps control test (from CONTROL TEST

 

 

switch.

 

 

table) and verify proper switch operation. Check all

PROTECTIVE LIMIT

LOW CONDENSER WATER FLOW

CDFL Flow Fault: Check condenser pump/

water valves and pump operation.

 

 

¯ow switch.

 

 

 

PROTECTIVE LIMIT

HIGH CONDENSER PRESSURE

High Cond Pressure [OPEN]*: Check switch,

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

 

 

oil pressure contact, and water temp/¯ow.

denser pressures and condenser water ¯ow. Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

oil pressure switch in the power panel. This alarm is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

not caused by the transducer.

 

 

High Cond Pressure [VALUE]*: Check switch,

Check water ¯ow in condenser. Check for fouled tubes.

 

 

water ¯ow, and transducer.

Transducer should be checked for accuracy. This alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is not caused by the high pressure switch.

PROTECTIVE LIMIT

HIGH CONDENSER PRESSURE

High Cond Pressure [VALUE]*: Check switch,

Check water ¯ow in condenser. Check for fouled tubes.

 

 

water ¯ow, and transducer.

Transducer should be checked for accuracy. This alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is not caused by the high pressure switch.

PROTECTIVE LIMIT

1CR AUX CONTACT FAULT

CR

 

 

 

 

AUX Starter Contact Fault: Check

1CR auxiliary contact opened while chiller was run-

 

 

1CR/1M aux contacts.

ning. Check starter for proper operation.

PROTECTIVE LIMIT

RUN AUX CONTACT FAULT

RUN

 

 

 

 

AUX Starter Contact Fault: Check

Run auxiliary contact opened while chiller was run-

 

 

1CR/1M aux contacts.

ning. Check starter for proper operation.

PROTECTIVE LIMIT

CCN OVERRIDE STOP

CHIL

 

 

 

 

S

 

S CCN Override Stop while in

CCN has signaled chiller to stop. Reset and restart

 

 

LOCAL run mode.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the Stop signal on STATUS01 table.

PROTECTIVE LIMIT

SPARE SAFETY DEVICE

SRP

 

 

 

 

PL Spare Safety Fault: Check

Spare safety input has tripped or factory-installed jumper

 

 

contacts.

not present.

PROTECTIVE LIMIT

EXCESSIVE MOTOR AMPS

CA

 

 

 

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

Check motor current for proper calibration. Check guide

 

 

High Amps; Check guide vane drive.

vane drive and actuator for proper operation.

PROTECTIVE LIMIT

EXCESSIVE COMPR SURGE

Compressor Surge: Check condenser wa-

Check condenser ¯ow and temperatures. Check con-

 

 

ter temp and ¯ow.

®guration of surge protection.

PROTECTIVE LIMIT

STARTER FAULT

STR

 

 

 

 

FLT Starter Fault: Check starter for

Check starter for possible ground fault, reverse rota-

 

 

fault source.

tion, voltage trip, etc.

PROTECTIVE LIMIT

STARTER OVERLOAD TRIP

STR

 

 

 

FLT Starter Overload Trip: Check

Reset overloads and reset alarm. Check motor cur-

 

 

amps calibration/reset overload.

rent calibration or overload calibration (do not ®eld-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

calibrate overloads).

*[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.

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Coupling Maintenance Motor Maintenance Piping Check Relief Devices Inspect WiringOCCPC01S Input Service Congurations Inspect Water PipingContents Introduction Abbreviations17EX Chiller Familiarization Performance CertifiedTypical 17EX Chiller Components OIL Cooling Cycle Lubrication CycleStarters Refrigeration, Cycle17EX Compressor Lubrication Cycle Controls DenitionsPIC Component Panel Location Temperature Sensors See Fig Pressure TransducersMajor PIC Components Panel Locations Processor Sensor Input/Output Module Control Center17EX Controls and Sensor Locations LID PICPsio Equip GND Ð GRDTewac LID Operation and Menus Fig PROCESSOR/SENSOR INPUT/OUTPUT Module PsioGeneral LID Service Screen YES or no , on or OFF , etc. to select the desired state Override OperationsDefault Screen 17EX LID Menu StructureEquipment Configuration Service TableAlarm History Control TestHgbp Ð Hot Gas Bypass CCNCarrier Comfort Network LIDChws SetpointChwr HgbpExample 1 Ð STATUS01 Display Screen Description Range Units Reference Point Name Alarm HistoryLID Display Data Menu Status SelectExample 2 Ð STATUS02 Display Screen Example 3 Ð STATUS03 Display ScreenMenu Status Example 4 Ð STATUS04 Display Screen Example 5 Ð Setpoint Display ScreenMenu Example 6 Ð Configuration Config Display Screen ECW Control OptionICE Build Termination Example 7 Ð LEAD/LAG Configuration Display Screen LAG =2, Standby =3Example 8 Ð SERVICE1 Display Screen Example 10 Ð SERVICE3 Display Screen Example 9 Ð SERVICE2 Display ScreenSpare Alert Enable Menu ServiceDischarge Temperature Example 11 Ð Maintenance MAINT01 Display ScreenExample 12 Ð Maintenance MAINT02 Display Screen Bearing TemperatureExample 13 Ð Maintenance MAINT03 Display Screen Example 14 Ð Maintenance MAINT04 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page ECW Cent Capacity ICE Build Setpoint Example of Attach to Network Device Screen To Access the Service Screens Example of Holiday Period ScreenSTART-UP/SHUTDOWN Recycle Sequence FigPage Equipment Required Before Initial START-UPJob Data Required MotorPage 17EX Leak Test Procedures Temperature F Ð HFC-134a Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Temperature CDehydration Cold Trap Inspect Wiring Check Optional Pumpout Compressor Water Pip900 500 901 7000 1000 7001-14500 2500 External Gear Pre-Start Checks Recommended Motor Fastener Tightening TorquesExternal Gear Lubrication System Check Starter Mechanical StartersSOLID-STATE Starters Set Up Chiller Control Conguration Input the Design Set Points Ð To modify the setInput the Local Occupied Schedule OCCPC01S Change the LID Configuration if Necessary Surge Limiting orT1/P1 Full Load Points T2/P2 Load Surge Prevention Occurs TOO Soon Occurs TOO Late Increase P1 by Decrease P1 by50% Control Test Menu Functions Charge Refrigerant into ChillerInitial START-UP Tests to be Devices Tested PerformedDry Run to Test Start-Up Sequence Check Motor RotationInitial Motor START-UP Page Flange Nut Tightening Torques Low Speed Couplings Only To Prevent Accidental Start-Up Ð The PIC can be Calibrate Motor Current Demand SettingCheck Oil Pressure and Compressor Stop General RecommendationsStarting the Chiller Operating InstructionsOperator Duties Stopping the ChillerPumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout CompressorPlant Chiller Serial No Chiller Model No Refrigerant Type Rear View RLA Valve ConditionGeneral Maintenance Return Chiller to Normal Operating ConditionsContact Seal Maintenance Refer to Ð Checking Guide Vane Linkage Ð Refer to FigContact Seal Page Chiller Alignment Checking Preliminary AlignmentMeasuring Angular Misalignment Elevation Alignment Formula Adjusting Angular Misalignment in Plan HOT Alignment CheckCorrecting Parallel Misalignment DowelingCheck Safety and Operating Controls Monthly Weekly MaintenanceScheduled Maintenance Changing the Oil FiltersCompressor OIL 17EX Chiller Oil SpecicationsPumpout Typical Float Valve Arrangement Sleeve Bearings Page Motor Riggings Inspect the Heat Exchanger Tubes Troubleshooting Guide Controls for Optional Pumpout CompressorPage MAINT03 MAINT01MAINT02 MAINT04Oilt 1CR AUXOilpd PICStarts Limit Exceeded Autorestart in ProgressPotential FREEZE-UP FaultOperation Failure to StopRunning Ð Temp Control Running Ð Demand LimitedChiller Protect Limit Faults Alert Sensor Fault AlertLOW OIL Pressure Autorestart PendingDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Possible Cause Ð Item NO.s External Gear Troubleshooting GuideProblem Possible Cause ActionÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Temperature Voltage Resistance DropModule Address Module SwitchControl Modules Input Options ModuleProcessor/Sensor Input/Output Module Psio Fig Starter Management Module SMM FigGRD Four-In/Two-Out Module Fig Installation of NEW Psio ModuleSwitch Setting Options Module Options ModulePhysical Data and Wiring Schematics 4-In/2-Out ModuleCondenser Total Weight Condenser Charge Additional Cooler WeightsWeight Vessel SIZE² 100Drive Component Weights Additional Condenser WeightsCompressor Weight and Elbow Weight 101Ð Total Motor Weight, English lb Ð Total Motor Weight, SI kg102 Approximate Refrigerant HCFC-134a Charge Marine Waterbox Cover WeightsNIH Waterbox Cover Weights 103Auxiliary Systems, Electrical Data Relief Valve Locations and Data104 Compressor Fits and Clearances 105106 Clearance Type DescriptionMeasure Tabulation Ð Impeller Clearances Open-Drive Compressors 10717FX 108 Press 109Temp Tewac110 111 112 113 GeneralT1-T4 114GND Ð Ground Terminal StripIndex Index Index Index Index Copyright 1997 Carrier Corporation

17EX specifications

The Carrier 17EX is recognized as an innovative air conditioning solution that combines efficiency with advanced technology. This model is designed to meet the increasing demands of residential and commercial cooling needs while maintaining environmental consciousness.

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