Conair MPA, MPW manual Performing AN Auto Tune

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PERFORMING AN AUTO TUNE

WARNING: Electric shock hazard

This equipment is powered by high voltage. Always disconnect and lock out the main power source before opening the unit or the electrical enclosure to modify factory settings. Failure to disconnect and lock out the main power source can result in severe personal injury.

You should perform an Auto Tune after the first two hours of operation and whenever process variables change (changes in condenser water pressure, piping or molds; large ambient swings; new setpoint temperature) to ensure that the control continues to obtain good approximations of the PID constants used to compensate for the thermal lag of the system.

To ensure a successful Auto Tune, verify that:

❒The Auto Tune feature has been enabled. Auto Tune is enabled or disabled via dip switch 2 on the motherboard.

❒The process value is stable. A fluctuating process value will fool the software into making inaccurate tuning deci- sions. The software waits 5 minutes for the process value to stabilize before it starts the Auto Tune process. If the process value still fluctuates after 5 minutes, the Auto Tune terminates and the control displays the “At ti” error.

❒The control is in STOP mode and the process value is in ambient temperature. This allows the software to obtain good approximations of process parameters, which are crit- ical for performing an accurate tune. If this requirement is not met, then a good tune cannot be guaranteed.

❒The setpoint/process deviation is at least 25° F. If the absolute value of setpoint - process temperature is not greater than or equal to 25° F, the Auto Tune will terminate. The control will display an “At dEV” error.

1	Press	Stop	to shut down the chiller.

2	Disconnect and lock out main power to the unit.

3	Enable Auto Tune.
3				8 7 6						5 4 3 2 1
				8 7 6						5 4 3 2 1
	Open the electrical enclosure.
	Open the electrical enclosure.
	Set dip switch 2 to ON.
	Close the electrical enclosure
	Close the electrical enclosure
	and restore power to the unit.

4 Restore power to the unit.

4-8OPERATION

microKool Portable Chillers

UGH004/0999

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Contents Page Date Manual Number UGH004/0999 Serial numbers Model numbers Table of Contents IntroductionTroubleshooting 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 Features High Efficiency CompressorsSpecifications MPW Water Cooled Psi PressureSpecifications MPA AIR Cooled MPA-5Freezing Points of Aqueous Ethylene Glycol Solutions Freeze Protection RequirementsInstallation Boxes UnpackingMicroKool Portable Chillers come fully assembled Make sure the installation area provides Preparing for InstallationInstall plumbing for process and cooling lines Connecting Process Water Supply Lines Install pipe to the rear of the chillerRemove the shipping pipe plug from the female Coat the pipe threads with thread sealantConnecting Main Power Supply Open the unit’s electrical enclosureTesting the Installation Apply power to the unitTurn on the condenser water supply MPW Units and check for leaks. If any leaks appear, stopEntering Setpoint Deviation Parameters Initial Setup Dip switch ConfigurationChanging Temperature Units Open the electrical enclosure Change Dip Switch 1 toDisconnect and lock out main power to the unit Open the electrical enclosure Set dip switch 3 to onSelect a new passcode using Setpoint adjustment buttonsOpen the electrical Press the RUN button to save the passcodeFollow Steps 1 through 5 Selecting Temperature Control Point Select a new control point using the Display buttonSet dip switch 5 to Press the RUN button to save the control pointInstalling Auto Start Feature Insert the two power leads from the deviceWhen Auto Start is enabled Set dip switch 4 to the on positionTo disable Auto Start Apply power to the chiller Enter the passcode, if necessary Activating SPI CommunicationConnect the host machine to the chiller Enter the node addressOperation PC-1 Control Features Setpoint displayPC-2 Control Features Pumpdown On/OffPositioning Control Panel To raise and swivel the control panelTo lower the control panel To detach the PC-2 control panelEntering a Passcode Press Setpoint to select the parameter you want to changeStarting the Chiller Enter the passcodeUsing Pumpdown Feature Stopping the ChillerTo shut down the unit Press Stop Press Button to turn on PumpdownPerforming AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Inspect power cords, wires and electrical connections Quarterly every 3 monthsCleaning Evaporators Cleaning CondensersLocate the fill port at Back of the chiller Refilling the TankTo fill the reservoir Checking Refrigerant Charge If the charge is low, recharge the systemSet dip switches 3 Performing System TestsPress To shut down the chiller Then open the electrical enclosureKEY/DISPLAY Test Input Test Connect all inputs to the systemPress 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 Calibrating Temperature Sensors Release the Setpoint keyExit Calibration Mode Press the up key to begin calibratingWait until the control displays don or bad Press SelectIndex through test menus to the operating log Logging Operating HoursExit the Operating Hours Log Troubleshooting Before Beginning FEW WordsVerify that you have manuals for other equip Messages shown on the control panel. TheseHOW to Identify Cause of a ProblemSupplied to the pump Motor?Is the required water flow Greater than the pump’sIs the thermocouple Loose?Ply wire leads become Level Switch fuse Has the indicated deviceHas one of the main sup Disconnected?Compressor Shut Down Alarms Refrigerant pressure is either too low or too highAll models Air-cooled unitsIs the freezestat setting Installed correctly?Freeze Stat Input is open Is there sufficient fluid Flow through he evaporaIs something wrong with Cable?System Alarms Chiller Will not Power UP Checking Replacing Fuses If fuses continue to failOn 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 WE’RE Here to Help From outside the United States, callAppendix A-2 SPI Commands Supported by Conair Microkool SPI Command PairsSPI Status Words Status, ProcessStatus, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5