Conair MPW, MPA manual Is the thermocouple, Loose?

Page 61

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 automatically shuts down.

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

SHUT DOWN ALARMS

Alarm

Possible cause Solution

Lo SAF

Actual temperature of water supplied to the process is below the programmed 10° F safety limit.

Has the compressor contactor failed closed?

Has the unloader valve failed?

Has the freezestat failed?

Check phase continuity through the compressor con- tactor. If the contactor has failed, replace it. See

REPLACING THE COMPRESSOR CONTACTOR.

See CHECKING THE UNLOADER

VALVE.

❒Check the freezestat setting. It should be set to cut out at 5° F above the freeze point of the process fluid solution.

❒Check for improper freezes- tat installation. Verify the freezestat sensor bulb is

well insulated and inserted into the piping well.

If the freezestat is properly installed and set, it may have

failed See REPLACING THE

FREEZESTAT.

Pbr

Err

Is the thermocouple

Check for a loose thermocou-

loose?

ple or loose wire connections

 

to the thermocouple.

The thermocouple

 

 

 

in the process

Has the thermocouple

Check the thermocouple and

return line failed.

failed?

replace if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the thermocouple

Check for a loose thermocou-

 

 

 

 

 

 

 

 

 

 

 

PbS

 

 

 

Err

 

 

 

 

 

 

 

 

 

loose?

ple or loose wire connections

 

 

 

 

 

 

 

 

 

The thermocouple

 

to the thermocouple.

 

 

 

 

 

 

in the process

Has the thermocouple

Check the thermocouple and

supply line failed.

failed?

replace if necessary.

UGH004/0999

microKool Portable Chiller

TROUBLESHOOTING 6-5

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Contents Page Date Manual Number UGH004/0999 Serial numbers Model numbers Introduction Table of ContentsTroubleshooting Introduction HOW Guide is Organized Purpose User GuideYour Responsibility AS a User Read this SO no ONE Gets Hurt Page Description CHILLER? What is the MicrokoolTypical Applications 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 Boxes UnpackingMicroKool Portable Chillers come fully assembled Make sure the installation area provides Preparing for InstallationInstall plumbing for process and cooling lines Install pipe to the rear of the chiller Connecting Process Water Supply LinesRemove the shipping pipe plug from the female Coat the pipe threads with thread sealantOpen the unit’s electrical enclosure Connecting Main Power SupplyApply power to the unit Testing the InstallationTurn on the condenser water supply MPW Units and check for leaks. If any leaks appear, stopEntering Setpoint Deviation Parameters Dip switch Configuration Initial SetupOpen the electrical enclosure Change Dip Switch 1 to Changing Temperature UnitsOpen the electrical enclosure Set dip switch 3 to on Disconnect and lock out main power to the unitSelect a new passcode using Setpoint adjustment buttonsOpen the electrical Press the RUN button to save the passcodeFollow Steps 1 through 5 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 FeatureWhen Auto Start is enabled Set dip switch 4 to the on positionTo disable Auto Start Activating SPI Communication Apply power to the chiller Enter the passcode, if necessaryConnect the host machine to the chiller Enter the node addressOperation Setpoint display PC-1 Control FeaturesPumpdown On/Off PC-2 Control FeaturesTo raise and swivel the control panel Positioning Control PanelTo lower the control panel To detach the PC-2 control panelPress Setpoint to select the parameter you want to change Entering a PasscodeEnter the passcode Starting the ChillerStopping the Chiller Using Pumpdown FeatureTo shut down the unit Press Stop Press Button to turn on PumpdownPerforming 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 EvaporatorsLocate the fill port at Back of the chiller Refilling the TankTo fill the reservoir If the charge is low, recharge the system Checking Refrigerant ChargePerforming System Tests Set dip switches 3Press To shut down the chiller Then open the electrical enclosureKEY/DISPLAY Test Connect all inputs to the system Input TestPress any key to display the first test menus Select the Input Test menuConnect all outputs to the system Output TestSelect the Output Test menu Disabling or Enabling Output Monitors Select the OM Enable/Disable menuSave changes and exit the output menu Release the Setpoint key Calibrating Temperature SensorsPress the up key to begin calibrating Exit Calibration ModeWait until the control displays don or bad Press SelectIndex through test menus to the operating log Logging Operating HoursExit the Operating Hours Log Troubleshooting FEW Words Before BeginningVerify that you have manuals for other equip Messages shown on the control panel. TheseCause of a Problem HOW to IdentifyMotor? Supplied to the pumpIs the required water flow Greater than the pump’sLoose? Is the thermocoupleLevel Switch fuse Has the indicated device Ply wire leads becomeHas one of the main sup Disconnected?Compressor Refrigerant pressure is either too low or too high Shut Down AlarmsAll models Air-cooled unitsInstalled correctly? Is the freezestat settingFreeze Stat Input is open Is there sufficient fluid Flow through he evaporaCable? Is something wrong withSystem Alarms Chiller Will not Power UP If fuses continue to fail Checking Replacing FusesOn the front panel counterclockwise to open Replace the fuse. The fuses are located on the motherCheck the overload Resetting OverloadsLocate the pump overload module attached Replacing the Motherboard Replacing Compressor Contactor Reverse this procedure to install the new conRemove and discard the old 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
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