Manuals / Conair / Kitchen Appliance / Refrigerator

Conair MPW Shut Down Alarms, Possible cause Solution, GPM=2.4 x chiller ton capacity, The Tank

Models: MPW MPA

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THE TANK.

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.

SHUT DOWN ALARMS

Alarm

Possible cause Solution

Refrigerant Pressure

Refrigerant pressure is either too low or too high.

High refrigerant pressure

Is the temperature of the condenser supply air or water too high?

Load conditions may be too high for proper operation.

Air-cooled chillers will not work properly if the ambient air temperature is above 100° F (38° C).

Water-cooled chillers will not work properly if the condenser water supply temperature is above 85° F (29° C). Check cooling tower operation, if a tower supplies the water.

	Is the refrigerant over-	Contact a certified refrigerant
	charged?	technician for servicing.

Low Water Alarm

Process fluid in the chiller tank is at the minimum level.

Is there enough fluid in the tank?

Check the fluid level by look- ing at the tank level sight glass at the rear of the chiller. Add fluid, if necessary. See FILLING

THE T ANK .

Freeze Stat Alarm

The Freeze Stat Input is open.

Is there sufficient fluid	Check for incorrect pump rota-
flow through he evapora-	tion and closed valves in the
tor?	process circuit. Verify required
	GPM rating for the chiller:
	(GPM=2.4 x chiller ton capacity)

Is the freezestat setting	Setting should be 10° F (5° C)
too high?	below the operating tempera-
	ture, and at least 5° F (2° C)
	above the freezing point of the
	process fluid.

Is the freezestat sensor	Check that the sensor bulb is
installed correctly?	well insulated and inserted
	completely into piping well.

UGH004/0999

microKool Portable Chillers

TROUBLESHOOTING 6-9

Image 65

Conair MPW, MPA manual Shut Down Alarms, Possible cause Solution, GPM=2.4 x chiller ton capacity, The Tank

Contents

Page Date Manual Number UGH004/0999 Serial numbers Model numbers MAINTENANCE INSTALLATIONTABLE OF CONTENTS INTRODUCTIONTROUBLESHOOTING MAINTENANCE . . . . . . . . . . . . . . .continuedPARTS/DIAGRAMS DIAGNOSTICSPurpose of the User Guide How the guide is organized INTRODUCTIONYour responsibilities as a user ATTENTION Read this so no one gets hurtYOUR RESPONSIBILITY AS A USER PURPOSE OF THE USER GUIDEHOW THE GUIDE IS ORGANIZED READ THIS SO NO ONE GETS HURT WARNING Electrical shock hazardPage Water-cooled models How it works Air-cooled models Features What is the microKool chiller? Typical applications How it worksSpecifications Water-cooled Specifications Air-cooled DESCRIPTIONTYPICAL APPLICATIONS WHAT IS THE MICROKOOLCHILLER? HOW IT WORKS WATER COOLED Typical air-cooled plumbing diagram HOW IT WORKS AIR COOLEDHigh Efficiency Compressors FEATURESMolded Plastic Reservoirs Water ConnectionsDimensions inches mm SPECIFICATIONS MPW WATER COOLEDWeight lb kg SPECIFICATION NOTESPerformance characteristics SPECIFICATIONS MPA AIR COOLEDDimensions inches mm SPECIFICATION NOTESEthylene Glycol, % by weight Freezing Points of Aqueous Ethylene Glycol SolutionsFREEZE PROTECTION REQUIREMENTS Freeze Protection Requirements by Unit Set TemperatureUnpacking the boxes Preparing for installation INSTALLATIONConnecting the water supply Connecting the main power Testing the installation Entering setpoint deviation parametersBOXES You are now ready to begin installationUNPACKING THE Make sure the installation area provides PREPARING FOR INSTALLATIONInstall plumbing for process and cooling lines 1 Position the chiller as close to the process machine as possible2 Install pipe to the rear of the chiller CONNECTING PROCESS AND WATER SUPPLY LINESTools for installation 1 Remove the shipping pipe plug from the female4 Connect the power wires to the terminals CONNECTING THE MAIN POWER SUPPLYIMPORTANT! Before initiating power to the unit 1 Open the unit’s electrical enclosureshould perform this procedure TESTING THE INSTALLATIONApply power to the unit Replace the access panelENTERING SETPOINT DEVIATION PARAMETERS WARNING Electric shock hazard INITIAL SETUPDip switch Configuration Change Dip Switch 1 to Disconnect and lock out main power to theCHANGING TEMPERATURE UNITS Open the electrical enclosureSet dip switch 3 to ON Disconnect and lock out main power to the unitand switches 5 and Close the electrical enclosure and restoreClose the electrical enclosure and restore power to the unit Set dip switch 3 to OFFPress the RUN button to save the passcode Open the electricalSet dip switches 3 and Disconnect and lockout power to the unitSet dip switch 5 to the 5 Close the electrical enclosure and restore power to the unitINSTALLATION Press the RUN button to save the control pointthe main power supply Turn off power to the unit4 Insert the two power leads from the device INSTALLING THE AUTO START FEATURE3-14 IMPORTANT AlwaysINSTALLING THE FEATURE6 Set dip switch 4 to the ON position When Auto Start is enabledACTIVATING SPI COMMUNICATION 2 Apply power to the chiller 3 Enter the passcode, if necessary3-16 1 Connect the host machine to the chillerStarting the chiller Stopping the chiller Using the PC-2 pumpdown PC-1 control features PC-2 control featuresOPERATION Positioning the control panel Entering a passcodeAlarm PC-1 CONTROL FEATURESSetpoint adjustment buttons Setpoint displayPumpdown On/Off PC-2 CONTROL FEATURESSetpoint adjustment buttons AlarmTo raise and swivel the control panel POSITIONING THE CONTROL PANELTo lower the control panel To detach the PC-2 control panelPress Setpoint to select the parameter you want to change ENTERING A PASSCODEPress again to enter the passcode 2 Make sure the chiller tank is full of fluid STARTING THE CHILLER3 Turn on the water supply to the chiller MPW 4 Enter the passcodeSTOPPING THE CHILLER USING THE PUMPDOWN FEATURETo shut down the unit 1 Press Stop Press the4 Restore power to the unit Enable Auto TuneDisconnect and lock out main power to the unit PERFORMING AN AUTO TUNEb a d PERFORMING AN AUTO TUNEInsufficient setpoint/process deviation Invalid PID constants were generatedPage Maintenance schedule Cleaning evaporators Cleaning condensers MAINTENANCEFilling the tank Checking refrigerant charge Performing system tests Key/Display Test Input Test Output Test Disabling or enabling5-2 MAINTENANCE PREVENTATIVE MAINTENANCE SCHEDULEPREVENTATIVE MAINTENANCE SCHEDULE Quarterly every 3 monthsAnnually every 12 months CLEANING CONDENSERS CLEANING EVAPORATORSTo clean the evaporator cleaning chemicalsDESCRIPTION section for information on glycol mix- tures REFILLING THE TANKLocate the fill port at 2 the back of the chiller If the charge is low, recharge the system CHECKING REFRIGERANT CHARGESet dip switch 6 to ON Set dip switches 3 andPERFORMING SYSTEM TESTS then open the electrical enclosureKEY/DISPLAY TEST Enable Test ModePress any key Press any key to clear all displaysConnect all inputs to the system INPUT TESTPress any key to display the first test menus Select the Input Test menu5-10 OUTPUT TESTConnect all outputs to the system Select the Output Test menuDISABLING OR ENABLING OUTPUT MONITORS Select the OM Enable/Disable menuPress the Setpoint to select the next output Save changes and exit the output menuCALIBRATING TEMPERATURE SENSORS 1 Enable Test Mode5-12 Release the Setpoint key7 Wait until the control displays “don” or “bad.” 6 Press the up key to begin calibratingPress Select 9 Exit Calibration Mode5-14 LOGGING OPERATING HOURSIndex through test menus to the operating log Exit the Operating Hours LogBefore beginning A few words of caution How to identify the cause TROUBLESHOOTINGof a problem Shut down alarms Warning alarms System alarmsFind the wiring, plumbing and other diagrams Before you begin troubleshootingIf an alarm is present, note any indicator lights BEFORE BEGINNINGTHE CAUSE OF A PROBLEM HOW TO IDENTIFYA problem can trigger three types of alarms When an Alarm condition occursSHUT DOWN ALARMS Possible cause SolutionAlarm Hi SAFPossible cause Solution Lo SAFSHUT DOWN ALARMS AlarmPossible cause Solution PHS ErrSHUT DOWN ALARMS AlarmSHUT DOWN ALARMS Possible cause SolutionAlarm Is the overload faulty or set incorrectly?Possible cause Solution SHUT DOWN ALARMSAlarm Refrigerant pressure is either too low or too highPossible cause Solution SHUT DOWN ALARMSAlarm GPM=2.4 x chiller ton capacityAlarm WARNING ALARMSPossible cause Solution Solution SYSTEM ALARMSCause ERR ERRSymptom CHILLER WILL NOT POWER UP6-12 Possible cause SolutionCHECKING AND REPLACING FUSES Disconnect and lockout the main powerTo replace a blown fuse If fuses continue to fail1 Disconnect and lockout the main power RESETTING OVERLOADSDisconnect auxiliary wiring on the overload module Set the module reset mode to M for manual9 Reconnect the terminal blocks and wires to the new board Disconnect and lockout the main power supplySet dip switches 7 and 8 to the correct unit type REPLACING THE MOTHERBOARDDisconnect the wires from the compressor con Reverse this procedure to install the new conREPLACING THE COMPRESSOR CONTACTOR 6-16CHECKING THE UNLOADER VALVE 1 Clear any alarms and restart the chiller 2 Watch for the followingDisconnect freezestat unit wires from their ter Disconnect and lockout the power supplyReverse the process to install the new unit. Be REPLACING THE FREEZESTATWE’RE HERE TO HELP HOW TO CONTACT CUSTOMER SERVICEBEFORE YOU From outside the United States, callAPPENDIX A-2 EQUIPMENT GUARANTEE PERFORMANCE WARRANTY WARRANTY LIMITATIONSAPPENDIX B-1 SPI COMMANDS SUPPORTED BY THE CONAIR MICROKOOLSPI Command Pairs Status, Process SPI STATUS WORDSAPPENDIX B-2 CHILLER SPI COMMANDSAPPENDIX B-3 Status, MachineCHILLER SPI COMMANDS SPI STATUS WORDSCHILLER SPI COMMANDS APPENDIX B-4SPI STATUS WORDS Status, MachinePC-1 Wiring Diagram . . . . . . . .PD-2 PARTS/DIAGRAMSPC-2 Wiring Diagram . . . . . . . .PD-4 Parts Lists . . . . . . . . . . . . . . . .PD-6UGH004/0999 PD-2PC-1 WIRING DIAGRAM PC-1 CIRCUIT BOARD PD-3PC-1 CIRCUIT BOARD JUMPERUGH004/0999 PD-4PC-2 WIRING DIAGRAM PC-2 CIRCUIT BOARD PD-5PC-2 CIRCUIT BOARD JUMPER