Carrier 19XL specifications Benshaw, Inc. Solid-State Starter Troubleshooting Guide, RV1, Scr

Page 84

Table 11 Ð Benshaw, Inc. Solid-State Starter Troubleshooting Guide

PROBLEM

 

PROBABLE CAUSES

 

AREA OF CORRECTION

AK board phase correct not

1.

L1 and L3 switch phases

1.

Switch incoming phases L1 and L3 at top of CD1 or CB1.

on.

 

reversed.

 

 

 

2.

Missing phase voltage.

2.

Check for missing phase voltage.

 

3.

Improper line voltage.

3.

Verify proper line voltage applied against synchronizing transformer

 

 

 

 

voltage.

AK board relay not on.

Ribbon cable not properly

Check ribbon cable for proper seating. Replace board if necessary.

 

seated.

 

 

AK board power

1.

Improper line voltage.

1.

Make sure proper line voltage is present at primary synchronizing

+15 vdc not on.

 

 

 

transformer.

 

2.

Transformer malfunction.

2.

Check synchronizing transformer secondary voltage as follows: On

 

 

 

 

the BC board, measure from TB11-1 to TB11-2 and TB11-1 to

 

 

 

 

TB11-3. Both readings should be within 30 to 36 vac. On the BC

 

 

 

 

board, measure from TB11-1 to TB11-4 and TB11-2 to TB11-4. Both

 

 

 

 

readings should be within 18 to 24 vac. Replace synchronizing

 

 

 

 

transformer if voltages are not within the speci®ed tolerances.

1L boards LEDs not on.

1.

A short exists between line

1.

Remove power and check resistance with ohmmeter.

 

 

and load terminals.

 

Locate and remove stray wire strands if required.

 

2.

An SCR is shorted in the

2.

Remove power. Use ohmmeter to measure the resistance or each

 

 

phase assembly.

 

SCR phase assembly from anode to cathode. The reading should

 

 

 

 

be 50,000 ohm or greater. If not, replace phase assembly.

BC board over-temperature

1.

Temperature switch not

1.

Disconnect power and check for continuity between TB11-10 and

LED (L3) on prior to run

 

functioning properly.

 

TB11-11. If no continuity exists, the overtemperature switch is not

command.

 

 

 

functioning properly. Replace defective switch if necessary.

 

2.

BC board not functioning

2.

Make sure BC board is functioning properly. Replace board if

 

 

properly.

 

necessary.

BC board LEDs on prior to run

BC board not functioning

Board not functioning properly. Replace board, if necessary.

command.

properly.

 

 

BC board LEDs not on after

1.

Phase assembly malfunction.

1. Remove power and check SCRs. Ohmmeter reading of each SCR

run command but before

 

 

 

gate to cathode resistance at terminals is 8 to 20 ohm. If not,

starter reaches full voltage.

 

 

 

replace the phase assembly.

 

2.

BC board not functioning

2.

Replace board, if necessary.

 

 

properly.

 

 

1L board LEDs remain on after

Imbalance between phases

Check for loose SCR gate lead or open SCR gate. Replace phase

starter reaches full voltage.

exists in motor terminal voltages.

assembly, if necessary.

BC board run LED (L5) not lit.

BC board not functioning

Measure 24 vdc at TB11-8 to TB11-4. If voltage is present, replace

 

properly.

board. If not present, replace relay 1CR.

AK board power applied, run

AK board not functioning

Replace board.

command given, starter at full

properly.

 

 

voltage, but aux LED not lit.

 

 

 

 

1L boards LEDs lit.

Motor terminal voltage phase

Check motor terminal voltages for imbalance between phases. If an

 

imbalance exists.

imbalance exists, check for loose SCR gate or open SCR gate.

 

 

 

Replace phase assembly, if necessary.

BC board LED L4 and L5

BC board not functioning

Replace board.

not lit.

properly.

 

 

BC board LED L3 lit.

1.

FU5 and FU6 fuses not

1.

Check fuses FU5 and FU6. Replace if necessary.

 

 

functioning properly.

 

 

 

2.

Phase assembly not

2.

Verify that bypass is pulling in by measuring the voltage drop

 

 

functioning properly.

 

across the contacts. The reading should be 50 mV or less.

 

 

 

 

Replace phase assembly, if necessary.

 

3.

Fan not functioning properly.

3.

Verify fan operation on each phase for 200 amp units. Replace

 

 

 

 

fan, if necessary.

BC board L2 lit.

SCR phases not functioning

Measure resistance from anode to cathode for each SCR phase

 

properly.

assembly. Replace shorted phase, if necessary.

BC board L1 lit.

Motor lead grounded.

Megger motor to test for motor lead going to ground.

Start command given.

Motor does not begin rotation.

Turn `Starting Torque' potentiometer RV2 clockwise until motor

 

 

 

rotation begins.

Motor does not reach full

Ramp up setting is not correct.

Turn `Ramp' potentiometer RV1 counterclockwise. Restart motor

speed within 25 seconds.

 

 

and verify that motor reaches full speed within 25 seconds.

115 vac missing from LL1

1.

CB2 is not on.

1.

Verify CB2 is on.

and LL2.

2.

Fuse no. 4 (FU4) blown.

2.

Check FU4 for continuity. Replace, if necessary.

 

SMM not responding.

1.

CB4 is not on.

1.

Verify CB4 is on.

 

2.

Potentiometer RV1 needs

2.

Adjust potentiometer RV1 for 24 vac at SMM terminals J3-23 and

 

 

adjustment.

 

J3-24.

 

 

 

LEGEND

 

 

AK

Ð

Vendor Board Designation

L1, L3

Ð

Terminal Board

BC

Ð

Vendor Board Designation

LL1, LL2

Ð

Control Power Terminals

CB

Ð Circuit Breaker

RV1

Ð Line Voltage Signal Calibration

CD

Ð Disconnect Switch

SCR

Ð Silicon Control Recti®er

CR

Ð Control Relay

SMM

Ð Starter Management Module

FU

Ð Fuse

TB

Ð Terminal Board

LED Ð Light-Emitting Diode

84

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Contents Introduction Abbreviations and ExplanationsChiller Familiarization Refrigeration CycleMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Take-Apart Rabbet Fit Connector Cooler In/Out Temperature SensorsCondenser In/Out Temperature Sensors Cooler Pressure Schrader FittingLubrication Cycle Refrigerant Motor Cooling and Oil Cooling CyclesLubrication System Starting Equipment Unit-Mounted Solid-State Starter OptionalDenitions ControlsMajor PIC Components Panel Locations PIC Component Panel19XL Controls and Sensor Locations Pressure Transducer, TypicalPower Panel with Options Control and OIL Heater Voltage Selector S1LID Operation and Menus Fig GeneralSelect − Example of Point Status Screen Status01 Override OperationsExample of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Setpoint Example of Set Point ScreenDescription Range Units Reference Point Name Alarm History LID ScreensExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 2 Ð STATUS02 Display Screen Example 3 Ð STATUS03 Display ScreenExample 4 Ð Setpoint Display Screen MenuExample 5 Ð Configuration Config Display Screen Example 6 Ð LEAD/LAG Configuration Display ScreenECW Control Option ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Example 8 Ð SERVICE2 Display Screen Spare Alert EnableExample 9 Ð SERVICE3 Display Screen Menu ServiceExample 10 Ð Maintenance MAINT01 Display Screen Example 11 Ð Maintenance MAINT02 Display ScreenDischarge Temperature Bearing TemperatureExample 12 Ð Maintenance MAINT03 Display Screen Example 13 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 Lead/Lag Control ECWHgbp Hot Gas BypassPage Ice Build Control Cent CapacityPage Example of Attach to Network Device Screen To LOG onSTART-UP/SHUTDOWN/RECYCLE Sequence FigRecycle Restart Delta T Using the Optional Storage Tank and Pumpout Before Initial START-UPJob Data Required Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature F Ð HCFC-22 Pressure Ð Temperature CÐ HFC-134a Pressure Ð Temperature F Ð HFC-134a Pressure Ð Temperature CTemperature Pressure Page Inspect Wiring Check Optional Pumpout Compressor Water PipCheck Starter MECHANICAL-TYPE StartersBenshaw, Inc. Solid-State Starter Power Stack BENSHAW, INC. SOLID-STATE StarterPower Up the Controls and Check the Oil Heater Set Up Chiller Control CongurationLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Amps Correction Factors For 19XL Motors Volt Motor CodeCharge Refrigerant into Chiller 19XL Chiller Equalization Without PUMP- OUT UnitControl Test Menu Functions Tests to be Devices Tested PerformedRefrigerant Charges 19XL Total Refrigerant ChargeCooler SizeInitial START-UP Dry Run to Test Start-Up SequenceCheck Rotation Check Oil Pressure and Compressor Stop Calibrate Motor CurrentOperating Instructions Operator DutiesTo Stop the Chiller Plant Pumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout CompressorTransfer Refrigerant from Storage Tank to Chiller TstatChillers with Isolation Valves Transfer the Refrigerant from Chiller to Storage TankGeneral Maintenance Test After Service, Repair, or Major Leak Ð IfReturn Refrigerant to Normal Operating Conditions Weekly Maintenance Guide Vane Actuator LinkageScheduled Maintenance Check Safety and Operating Controls MonthlyTo Change the OIL Compressor Bearing and Gear Mainten Inspect the Heat Exchanger TubesOptional Pumpout System Controls Troubleshooting Guide MAINT01 MAINT02MAINT03 MAINT04Shutdown with ON/OFF/RESET-OFF Timing OUT or Timed OUTRecycle Shutdown Normal or AUTO.-RESTARTAutorestart in Progress LOW Chilled Water Normal RUN with RESET, TEMPERATURE, or Demand Compressor Jumpstart and Refrigerant ProtectionNormal RUN Overrides Active Alerts OUT-OF-RANGE Sensor FailuresLimited Chiller Protect Limit Faults Protective LimitChiller Alerts Spare Sensor Alert MessagesOther PROBLEMS/MALFUNCTIONS DESCRIPTION/MALFUNCTION Probable CAUSE/REMEDYÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Control Modules Module AddressInput Options Module Starter Management Module SMM Fig Processor Module Psio FigOptions Module Installation Switch Options Setting ModuleTypical Benshaw, Inc. Solid-State Starter internal View Page Page Benshaw, Inc. Solid-State Starter Troubleshooting Guide Problem Probable Causes Area of CorrectionRV1 SCRHeat Exchanger Data Additional Data for Marine WaterboxesCooler CondenserWaterbox Cover Weights CoolersCondensers 1034 kPaCompressor/Motor Weights Compressor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances Compressor Assembly Torques Description TorqueFt-lb ``ZCLR COMComm EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic PMR POTGFR 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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