Conair MPW, MPA manual Insufficient setpoint/process deviation

Page 41

PERFORMING AN AUTO TUNE

5

Press Run and (the Setpoint Select button) simultaneously to begin the Auto Tune.

The Actual display will flash “At” and the current process temperature to indicate that an Auto Tune is underway.

If Auto Tune is successful, the controller automatically starts controlling using the new PID parameters.

If you press the STOP button or a fault occurs during the Auto Tune, the control enters stop mode and Auto Tuning immediately terminates. The actual display stops flashing “At.” If a fault occurred, the control will display the appro- priate error message.

ERROR MESSAGE

 

ERROR DESCRIPTION

 

 

 

 

 

 

 

 

 

Insufficient setpoint/process deviation.

 

 

 

 

 

 

 

 

 

 

A t

 

 

 

d E v

 

 

 

 

 

 

 

 

If the absolute value of (setpoint - process

 

 

 

 

 

 

 

 

 

value) is less than 25° F. The Auto Tune can-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

not be started until the temperature

 

 

 

 

 

 

 

 

 

difference is at least 25° F.

 

 

 

 

 

 

 

 

 

Auto Tune timed out. Auto Tune will time out

 

 

 

 

 

 

 

 

 

 

 

A t

 

 

 

t I

 

 

 

 

 

 

 

 

 

if a stable process value cannot be obtained

 

 

 

 

 

 

 

 

 

5 minutes into the tune, or if the tuning

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

process takes longer than 30 minutes. If this

 

 

 

 

 

 

 

 

 

error occurs, verify that you followed every

 

 

 

 

 

 

 

 

 

requirement under “To ensure a successful

 

 

 

 

 

 

 

 

 

Auto Tune” and perform a second tune.

 

 

 

 

 

 

 

 

 

Invalid PID constants were generated.

 

 

A t

 

 

 

b a d

 

 

 

 

 

 

 

 

 

The most likely causes of this error is a tune

 

 

 

 

 

 

 

 

 

 

started inappropriately or an external ele- ment (i.e., loose thermocouple) that upset the process while tuning was in progress. Verify that you followed every requirement under “To ensure a successful Auto Tune” and perform a second tune.

UGH004/0999

microKool Portable Chillers

OPERATION 4-9

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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 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 buttonsFollow 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 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 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 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 menuSelect 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 the up key to begin calibrating Exit Calibration ModeWait until the control displays don or bad Press SelectExit the Operating Hours Log Logging Operating HoursIndex through test menus to the operating 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 motherLocate 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
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