Conair MPW, MPA manual HOW to Identify, Cause of a Problem

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Most chiller malfunctions are indicated by an illuminated alarm light and error codes displayed on the control panel.

HOW TO IDENTIFY

A problem can trigger three types of alarms:

●Shut Down Alarms: The chiller detected a problem that caused it to shut down automatically to prevent equipment damage or personal injury.

●Warning Alarms: The chiller continues to operate, but warns of a problem that could lead to a condition that will shut down the unit.

●System Errors: The system error codes indicate a non- recoverable problem with the microprocessor control.

When the chiller control detects a problem, the red Alarm light is activated and the RUN/STOP light changes from green to flashing red.

THE CAUSE OF A PROBLEM

A status light that turns from green to red indicates an alarm condition.

When an Alarm condition occurs:

1 Press to silence any optional audible alarm.

◆The RUN/STOP light changes from flashing red to steady red.

2 Note any indicator lights or error messages to

help determine the cause of the problem.

3 Find the alarm or error code in the diagnostics tables in the TROUBLESHOOTING section of this manual.

4	Press	Stop	to clear the alarm and shut down
	the chiller		to correct the problem.

	Press	Run	to resume normal operation after

the problem is corrected.

WARNING:

Disconnect and lock out the main power source before opening the chiller or its electrical enclosure for servicing. Disconnect water supply lines as needed.

UGH004/0999

microKool Portable Chillers

TROUBLESHOOTING 6-3

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Contents Page Date Manual Number UGH004/0999 Serial numbers Model numbers Introduction Table of ContentsTroubleshooting Introduction Your Responsibility AS a User Purpose User GuideHOW Guide is Organized Read this SO no ONE Gets Hurt Page Description Typical Applications What is the MicrokoolCHILLER? HOW IT Works Water Cooled HOW IT Works AIR Cooled High Efficiency Compressors FeaturesPsi Pressure Specifications MPW Water CooledMPA-5 Specifications MPA AIR CooledFreeze Protection Requirements Freezing Points of Aqueous Ethylene Glycol SolutionsInstallation MicroKool Portable Chillers come fully assembled UnpackingBoxes Install plumbing for process and cooling lines Preparing for InstallationMake sure the installation area provides Coat the pipe threads with thread sealant Connecting Process Water Supply LinesInstall pipe to the rear of the chiller Remove the shipping pipe plug from the femaleOpen the unit’s electrical enclosure Connecting Main Power SupplyUnits and check for leaks. If any leaks appear, stop Testing the InstallationApply power to the unit Turn on the condenser water supply MPWEntering Setpoint Deviation Parameters Dip switch Configuration Initial SetupOpen the electrical enclosure Change Dip Switch 1 to Changing Temperature UnitsSetpoint adjustment buttons Disconnect and lock out main power to the unitOpen the electrical enclosure Set dip switch 3 to on Select a new passcode usingFollow Steps 1 through 5 Press the RUN button to save the passcodeOpen the electrical Select a new control point using the Display button Selecting Temperature Control PointPress the RUN button to save the control point Set dip switch 5 toInsert the two power leads from the device Installing Auto Start FeatureTo disable Auto Start Set dip switch 4 to the on positionWhen Auto Start is enabled Enter the node address Apply power to the chiller Enter the passcode, if necessaryActivating SPI Communication Connect the host machine to the chillerOperation Setpoint display PC-1 Control FeaturesPumpdown On/Off PC-2 Control FeaturesTo detach the PC-2 control panel Positioning Control PanelTo raise and swivel the control panel To lower the control panelPress Setpoint to select the parameter you want to change Entering a PasscodeEnter the passcode Starting the ChillerPress Button to turn on Pumpdown Using Pumpdown FeatureStopping the Chiller To shut down the unit Press StopPerforming AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Quarterly every 3 months Inspect power cords, wires and electrical connectionsCleaning Condensers Cleaning EvaporatorsTo fill the reservoir Refilling the TankLocate the fill port at Back of the chiller If the charge is low, recharge the system Checking Refrigerant ChargeThen open the electrical enclosure Set dip switches 3Performing System Tests Press To shut down the chillerKEY/DISPLAY Test Select the Input Test menu Input TestConnect all inputs to the system Press any key to display the first test menusSelect the Output Test menu Output TestConnect all outputs to the system Save changes and exit the output menu Select the OM Enable/Disable menuDisabling or Enabling Output Monitors Release the Setpoint key Calibrating Temperature SensorsPress Select Exit Calibration ModePress the up key to begin calibrating Wait until the control displays don or badExit the Operating Hours Log Logging Operating HoursIndex through test menus to the operating log Troubleshooting Messages shown on the control panel. These Before BeginningFEW Words Verify that you have manuals for other equipCause of a Problem HOW to IdentifyGreater than the pump’s Supplied to the pumpMotor? Is the required water flowLoose? Is the thermocoupleDisconnected? Ply wire leads becomeLevel Switch fuse Has the indicated device Has one of the main supCompressor Air-cooled units Shut Down AlarmsRefrigerant pressure is either too low or too high All modelsFlow through he evapora Is the freezestat settingInstalled correctly? Freeze Stat Input is open Is there sufficient fluidCable? Is something wrong withSystem Alarms Chiller Will not Power UP Replace the fuse. The fuses are located on the mother Checking Replacing FusesIf fuses continue to fail On the front panel counterclockwise to openLocate the pump overload module attached Resetting OverloadsCheck the overload Replacing the Motherboard Remove and discard the old contactor Reverse this procedure to install the new conReplacing Compressor Contactor Checking Unloader Valve Replacing the Freezestat From outside the United States, call WE’RE Here to HelpAppendix A-2 SPI Command Pairs SPI Commands Supported by Conair MicrokoolStatus, Process SPI Status WordsStatus, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5