Compressor | Conair MPW, MPA specs

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

Compressor

The compressor overload has tripped.

NOTE: This alarm is available only on models with semi- hermetic compressor sizes 15 Hp and above.

Is the correct voltage supplied to the motor on the compressor?

Is the overload faulty or set incorrectly?

Supply voltage should match the rating on the motor name plate. If voltage is correct, check wiring connections.

Disconnect the power and open the electrical enclosure for the compressor. Verify that the overload is set to trip at the proper amperage, which should not exceed the FLA. Manually trip and reset the overload. If the problem con- tinues, replace the overload.

Is the compressor faulty? Replace the compressor if supply voltage, wiring and overload settings are correct, but the pump continues to draw excessive current.

Oil Safety Alarm

The Oil Safety input is open.

NOTE: This alarm can be present only on models with compressor sizes 15 Hp and above.

Oil level in the compres- sor is low, or the input has failed.

See PERFORMING SYSTEM TESTS

and perform an INPUT TEST. If the input is OK, call Conair service.

UGH004/0999

microKool Portable Chiller

TROUBLESHOOTING 6-7

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Conair MPW, MPA manual Compressor

Contents

Page Date Manual Number UGH004/0999 Serial numbers Model numbers Introduction Table of Contents Troubleshooting Introduction Purpose User Guide HOW Guide is OrganizedYour Responsibility AS a User Read this SO no ONE Gets Hurt Page Description What is the Microkool CHILLER?Typical Applications HOW IT Works Water Cooled HOW IT Works AIR Cooled High Efficiency Compressors Features Psi Pressure Specifications MPW Water Cooled MPA-5 Specifications MPA AIR Cooled Freeze Protection Requirements Freezing Points of Aqueous Ethylene Glycol Solutions Installation Unpacking BoxesMicroKool Portable Chillers come fully assembled Preparing for Installation Make sure the installation area providesInstall plumbing for process and cooling lines 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 female Open the unit’s electrical enclosure Connecting Main Power Supply Units and check for leaks. If any leaks appear, stop Testing the InstallationApply power to the unit Turn on the condenser water supply MPW Entering Setpoint Deviation Parameters Dip switch Configuration Initial Setup Open the electrical enclosure Change Dip Switch 1 to Changing Temperature Units Setpoint adjustment buttons Disconnect and lock out main power to the unitOpen the electrical enclosure Set dip switch 3 to on Select a new passcode using Press the RUN button to save the passcode Open the electricalFollow Steps 1 through 5 Select a new control point using the Display button Selecting Temperature Control Point Press the RUN button to save the control point Set dip switch 5 to Insert the two power leads from the device Installing Auto Start Feature Set dip switch 4 to the on position When Auto Start is enabledTo disable Auto Start Enter the node address Apply power to the chiller Enter the passcode, if necessaryActivating SPI Communication Connect the host machine to the chiller Operation Setpoint display PC-1 Control Features Pumpdown On/Off PC-2 Control Features To detach the PC-2 control panel Positioning Control PanelTo raise and swivel the control panel To lower the control panel Press Setpoint to select the parameter you want to change Entering a Passcode Enter the passcode Starting the Chiller Press Button to turn on Pumpdown Using Pumpdown FeatureStopping the Chiller To shut down the unit Press Stop Performing AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Quarterly every 3 months Inspect power cords, wires and electrical connections Cleaning Condensers Cleaning Evaporators Refilling the Tank Locate the fill port at Back of the chillerTo fill the reservoir If the charge is low, recharge the system Checking Refrigerant Charge Then open the electrical enclosure Set dip switches 3Performing System Tests Press To shut down the chiller KEY/DISPLAY Test Select the Input Test menu Input TestConnect all inputs to the system Press any key to display the first test menus Output Test Connect all outputs to the systemSelect the Output Test menu Select the OM Enable/Disable menu Disabling or Enabling Output MonitorsSave changes and exit the output menu Release the Setpoint key Calibrating Temperature Sensors Press Select Exit Calibration ModePress the up key to begin calibrating Wait until the control displays don or bad Logging Operating Hours Index through test menus to the operating logExit the Operating Hours Log Troubleshooting Messages shown on the control panel. These Before BeginningFEW Words Verify that you have manuals for other equip Cause of a Problem HOW to Identify Greater than the pump’s Supplied to the pumpMotor? Is the required water flow Loose? Is the thermocouple Disconnected? Ply wire leads becomeLevel Switch fuse Has the indicated device Has one of the main sup Compressor Air-cooled units Shut Down AlarmsRefrigerant pressure is either too low or too high All models Flow through he evapora Is the freezestat settingInstalled correctly? Freeze Stat Input is open Is there sufficient fluid Cable? Is something wrong with System 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 open Resetting Overloads Check the overloadLocate the pump overload module attached Replacing the Motherboard Reverse this procedure to install the new con Replacing Compressor ContactorRemove and discard the old contactor Checking Unloader Valve Replacing the Freezestat From outside the United States, call WE’RE Here to Help Appendix A-2 SPI Command Pairs SPI Commands Supported by Conair Microkool Status, Process SPI Status Words Status, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5