Manuals / Conair / Kitchen Appliance / Refrigerator

Conair MPA, MPW Shut Down Alarms, Possible cause Solution, Continued on next page, All models

Models: MPW MPA

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SHUT DOWN ALARMS

SHUT DOWN ALARMS

The chiller has detected a problem that could lead to equipment damage or personal injury if it is not corrected.

◆The Alarm LED lights and the STOP/RUN LED flashes red.

◆The chiller turns off the compressor, but normal operation resumes after you clear the alarm or the problem corrects itself.

◆The control displays a red LED or alarm code indicating the source of the problem.

Alarm

Possible cause Solution

Refrigerant Pressure

Refrigerant pressure is either too low or too high.

WARNING:

The microKool should be tested and repaired only by qualified techni- cians equipped with the correct tools and trained in the mainte- nance and repair of electrical and refriger- ant systems used in industrial applications.

Low refrigerant pressure:

Is the refrigerant charge low?

Is the liquid refrigerant line restricted?

High refrigerant pressure

Has the water or air flow through the condenser become restricted?

(Continued on next page)

See CHECKING REFRIGERANT

CHARGE. Check for leaks in the refrigerant circuit. Contact a certified refrigerant technician to repair and recharge the sys- tem.

Check for closed valves or a plugged refrigerant line.

❒Verify that the liquid line shut-off valve is open.

❒Verify that the suction valve at the compressor is open.

❒Verify that the expansion valve is working properly.

Check for closed valves and obstructions, contaminants or dirt that may have blocked or restricted condenser efficiency.

All models:

❒Clean the condenser coils. See

CLEANING CONDENSERS.

Air-cooled units:

❒Remove any obstructions to air flow at the condenser air inlet and outlet.

❒Verify that the condenser fans are working. Confirm proper rotation and check for an elec- trical overload.

Water-cooled units:

❒Check for closed valves or plugged water supply lines.

❒Verify that the condenser water supply is working and that incoming water pressure is at least 25 psi.

6-8

TROUBLESHOOTING

microKool Portable Chillers

UGH004/0999

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Conair MPA, MPW Shut Down Alarms, Possible cause Solution, Refrigerant pressure is either too low or too high, All models

Contents

Page Date Manual Number UGH004/0999 Serial numbers Model numbers INSTALLATION MAINTENANCETABLE OF CONTENTS INTRODUCTIONMAINTENANCE . . . . . . . . . . . . . . .continued TROUBLESHOOTINGPARTS/DIAGRAMS DIAGNOSTICSINTRODUCTION Purpose of the User Guide How the guide is organizedYour responsibilities as a user ATTENTION Read this so no one gets hurtHOW THE GUIDE IS ORGANIZED PURPOSE OF THE USER GUIDEYOUR RESPONSIBILITY AS A USER WARNING Electrical shock hazard READ THIS SO NO ONE GETS HURTPage What is the microKool chiller? Typical applications How it works Water-cooled models How it works Air-cooled models FeaturesSpecifications Water-cooled Specifications Air-cooled DESCRIPTIONCHILLER? WHAT IS THE MICROKOOLTYPICAL APPLICATIONS HOW IT WORKS WATER COOLED HOW IT WORKS AIR COOLED Typical air-cooled plumbing diagramFEATURES High Efficiency CompressorsMolded Plastic Reservoirs Water ConnectionsSPECIFICATIONS MPW WATER COOLED Dimensions inches mmWeight lb kg SPECIFICATION NOTESSPECIFICATIONS MPA AIR COOLED Performance characteristicsDimensions inches mm SPECIFICATION NOTESFreezing Points of Aqueous Ethylene Glycol Solutions Ethylene Glycol, % by weightFREEZE PROTECTION REQUIREMENTS Freeze Protection Requirements by Unit Set TemperatureINSTALLATION Unpacking the boxes Preparing for installationConnecting the water supply Connecting the main power Testing the installation Entering setpoint deviation parametersUNPACKING THE You are now ready to begin installationBOXES PREPARING FOR INSTALLATION Make sure the installation area providesInstall plumbing for process and cooling lines 1 Position the chiller as close to the process machine as possibleCONNECTING PROCESS AND WATER SUPPLY LINES 2 Install pipe to the rear of the chillerTools for installation 1 Remove the shipping pipe plug from the femaleCONNECTING THE MAIN POWER SUPPLY 4 Connect the power wires to the terminalsIMPORTANT! Before initiating power to the unit 1 Open the unit’s electrical enclosureTESTING THE INSTALLATION should perform this procedureApply power to the unit Replace the access panelENTERING SETPOINT DEVIATION PARAMETERS Dip switch Configuration INITIAL SETUPWARNING Electric shock hazard Disconnect and lock out main power to the Change Dip Switch 1 toCHANGING TEMPERATURE UNITS Open the electrical enclosureDisconnect and lock out main power to the unit Set dip switch 3 to ONand switches 5 and Close the electrical enclosure and restoreSet dip switch 3 to OFF Close the electrical enclosure and restore power to the unitPress the RUN button to save the passcode Open the electricalDisconnect and lockout power to the unit Set dip switches 3 andSet dip switch 5 to the 5 Close the electrical enclosure and restore power to the unitPress the RUN button to save the control point INSTALLATIONthe main power supply Turn off power to the unitINSTALLING THE AUTO START FEATURE 4 Insert the two power leads from the device3-14 IMPORTANT AlwaysFEATURE INSTALLING THE6 Set dip switch 4 to the ON position When Auto Start is enabled2 Apply power to the chiller 3 Enter the passcode, if necessary ACTIVATING SPI COMMUNICATION3-16 1 Connect the host machine to the chillerPC-1 control features PC-2 control features Starting the chiller Stopping the chiller Using the PC-2 pumpdownOPERATION Positioning the control panel Entering a passcodePC-1 CONTROL FEATURES AlarmSetpoint adjustment buttons Setpoint displayPC-2 CONTROL FEATURES Pumpdown On/OffSetpoint adjustment buttons AlarmPOSITIONING THE CONTROL PANEL To raise and swivel the control panelTo lower the control panel To detach the PC-2 control panelPress again to enter the passcode ENTERING A PASSCODEPress Setpoint to select the parameter you want to change STARTING THE CHILLER 2 Make sure the chiller tank is full of fluid3 Turn on the water supply to the chiller MPW 4 Enter the passcodeUSING THE PUMPDOWN FEATURE STOPPING THE CHILLERTo shut down the unit 1 Press Stop Press theEnable Auto Tune 4 Restore power to the unitDisconnect and lock out main power to the unit PERFORMING AN AUTO TUNEPERFORMING AN AUTO TUNE b a dInsufficient setpoint/process deviation Invalid PID constants were generatedPage MAINTENANCE Maintenance schedule Cleaning evaporators Cleaning condensersFilling the tank Checking refrigerant charge Performing system tests Key/Display Test Input Test Output Test Disabling or enablingPREVENTATIVE MAINTENANCE SCHEDULE 5-2 MAINTENANCEAnnually every 12 months Quarterly every 3 monthsPREVENTATIVE MAINTENANCE SCHEDULE CLEANING EVAPORATORS CLEANING CONDENSERSTo clean the evaporator cleaning chemicalsLocate the fill port at 2 the back of the chiller REFILLING THE TANKDESCRIPTION section for information on glycol mix- tures CHECKING REFRIGERANT CHARGE If the charge is low, recharge the systemSet dip switches 3 and Set dip switch 6 to ONPERFORMING SYSTEM TESTS then open the electrical enclosureEnable Test Mode KEY/DISPLAY TESTPress any key Press any key to clear all displaysINPUT TEST Connect all inputs to the systemPress any key to display the first test menus Select the Input Test menuOUTPUT TEST 5-10Connect all outputs to the system Select the Output Test menuSelect the OM Enable/Disable menu DISABLING OR ENABLING OUTPUT MONITORSPress the Setpoint to select the next output Save changes and exit the output menu1 Enable Test Mode CALIBRATING TEMPERATURE SENSORS5-12 Release the Setpoint key6 Press the up key to begin calibrating 7 Wait until the control displays “don” or “bad.”Press Select 9 Exit Calibration ModeLOGGING OPERATING HOURS 5-14Index through test menus to the operating log Exit the Operating Hours LogTROUBLESHOOTING Before beginning A few words of caution How to identify the causeof a problem Shut down alarms Warning alarms System alarmsBefore you begin troubleshooting Find the wiring, plumbing and other diagramsIf an alarm is present, note any indicator lights BEFORE BEGINNINGHOW TO IDENTIFY THE CAUSE OF A PROBLEMA problem can trigger three types of alarms When an Alarm condition occursPossible cause Solution SHUT DOWN ALARMSAlarm Hi SAFLo SAF Possible cause SolutionSHUT DOWN ALARMS AlarmPHS Err Possible cause SolutionSHUT DOWN ALARMS AlarmPossible cause Solution SHUT DOWN ALARMSAlarm Is the overload faulty or set incorrectly?SHUT DOWN ALARMS Possible cause SolutionAlarm Refrigerant pressure is either too low or too highSHUT DOWN ALARMS Possible cause SolutionAlarm GPM=2.4 x chiller ton capacityPossible cause Solution WARNING ALARMSAlarm SYSTEM ALARMS SolutionCause ERR ERRCHILLER WILL NOT POWER UP Symptom6-12 Possible cause SolutionDisconnect and lockout the main power CHECKING AND REPLACING FUSESTo replace a blown fuse If fuses continue to failRESETTING OVERLOADS 1 Disconnect and lockout the main powerDisconnect auxiliary wiring on the overload module Set the module reset mode to M for manualDisconnect and lockout the main power supply 9 Reconnect the terminal blocks and wires to the new boardSet dip switches 7 and 8 to the correct unit type REPLACING THE MOTHERBOARDReverse this procedure to install the new con Disconnect the wires from the compressor conREPLACING THE COMPRESSOR CONTACTOR 6-161 Clear any alarms and restart the chiller 2 Watch for the following CHECKING THE UNLOADER VALVEDisconnect and lockout the power supply Disconnect freezestat unit wires from their terReverse the process to install the new unit. Be REPLACING THE FREEZESTATHOW TO CONTACT CUSTOMER SERVICE WE’RE HERE TO HELPBEFORE YOU From outside the United States, callEQUIPMENT GUARANTEE PERFORMANCE WARRANTY WARRANTY LIMITATIONS APPENDIX A-2SPI Command Pairs SPI COMMANDS SUPPORTED BY THE CONAIR MICROKOOLAPPENDIX B-1 SPI STATUS WORDS Status, ProcessAPPENDIX B-2 CHILLER SPI COMMANDSStatus, Machine APPENDIX B-3CHILLER SPI COMMANDS SPI STATUS WORDSAPPENDIX B-4 CHILLER SPI COMMANDSSPI STATUS WORDS Status, MachinePARTS/DIAGRAMS PC-1 Wiring Diagram . . . . . . . .PD-2PC-2 Wiring Diagram . . . . . . . .PD-4 Parts Lists . . . . . . . . . . . . . . . .PD-6PC-1 WIRING DIAGRAM PD-2UGH004/0999 PD-3 PC-1 CIRCUIT BOARDPC-1 CIRCUIT BOARD JUMPERPC-2 WIRING DIAGRAM PD-4UGH004/0999 PD-5 PC-2 CIRCUIT BOARDPC-2 CIRCUIT BOARD JUMPER