Conair MPA, MPW manual Is something wrong with, Cable?

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WARNING ALARMS

The chiller has detected a problem that could lead to a shut down condition if it is not corrected.

◆The Alarm LED lights.

◆The chiller continues operating.

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

Alarm

Possible cause Solution

Low Deviation

The actual temper- ature of fluid sup- plied to the process is lower than the setpoint deviation limit allows.

Is the low deviation tem- perature set too low?

Increase the low deviation limit setting. The recommend- ed setting is 2° F to 10° F below the process setpoint.

High Deviation

The actual temper- ature of fluid sup- plied to the process is higher than the setpoint deviation allows.

Is the low deviation tem- perature set too high?

Has the process fluid stopped flowing between outlet and inlet?

Is the unloader valve stuck open?

Increase the high deviation limit setting. The recommend- ed setting is 2° F to 10° F above the process setpoint.

Check for plugged pipes and closed valves. Clear any obstructions and open valves.

See CHECKING THE UNLOADER

VALVE.

SPI Communication

The SPI communi- cation link has failed.

Is the unit connected to a host machine?

Are the network address and baud rate correct?

If the chiller is not connected to a host device, set the SPI address to OFF.

❒Check the network address. The address may be set to any number from 32 to 254 (a hexadecimal integer between 20 and FE), as long as that number has not been assigned to another machine on the same network.

❒Make sure the baud rate (9600, 4800, 2400, or 1200) matches the host machine.

Is something wrong with	Check the communication
the cable?	cable condition and connec-
	tions. The cable must conform
	to SPI standards.

6-10TROUBLESHOOTING

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 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 Features High Efficiency CompressorsSpecifications MPW Water Cooled Psi PressureSpecifications MPA AIR Cooled MPA-5Freezing Points of Aqueous Ethylene Glycol Solutions Freeze Protection RequirementsInstallation Unpacking BoxesMicroKool Portable Chillers come fully assembled Preparing for Installation Make sure the installation area providesInstall plumbing for process and cooling lines Remove the shipping pipe plug from the female Connecting Process Water Supply LinesInstall pipe to the rear of the chiller Coat the pipe threads with thread sealantConnecting Main Power Supply Open the unit’s electrical enclosureTurn on the condenser water supply MPW Testing the InstallationApply power to the unit 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 toSelect a new passcode using Disconnect and lock out main power to the unitOpen the electrical enclosure Set dip switch 3 to on Setpoint adjustment buttonsPress the RUN button to save the passcode Open the electricalFollow 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 deviceSet dip switch 4 to the on position When Auto Start is enabledTo disable Auto Start Connect the host machine to the chiller Apply power to the chiller Enter the passcode, if necessaryActivating SPI Communication Enter the node addressOperation PC-1 Control Features Setpoint displayPC-2 Control Features Pumpdown On/OffTo lower the control panel Positioning Control PanelTo raise and swivel 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 passcodeTo shut down the unit Press Stop Using Pumpdown FeatureStopping the Chiller 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 CondensersRefilling the Tank Locate the fill port at Back of the chillerTo fill the reservoir Checking Refrigerant Charge If the charge is low, recharge the systemPress To shut down the chiller Set dip switches 3Performing System Tests Then open the electrical enclosureKEY/DISPLAY Test Press any key to display the first test menus Input TestConnect all inputs to the system Select the Input Test menuOutput 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 Calibrating Temperature Sensors Release the Setpoint keyWait until the control displays don or bad Exit Calibration ModePress the up key to begin calibrating Press SelectLogging Operating Hours Index through test menus to the operating logExit the Operating Hours Log Troubleshooting Verify that you have manuals for other equip Before BeginningFEW Words Messages shown on the control panel. TheseHOW to Identify Cause of a ProblemIs the required water flow Supplied to the pumpMotor? Greater than the pump’sIs the thermocouple Loose?Has one of the main sup Ply wire leads becomeLevel Switch fuse Has the indicated device Disconnected?Compressor All models Shut Down AlarmsRefrigerant pressure is either too low or too high Air-cooled unitsFreeze Stat Input is open Is there sufficient fluid Is the freezestat settingInstalled correctly? Flow through he evaporaIs something wrong with Cable?System Alarms Chiller Will not Power UP On the front panel counterclockwise to open Checking Replacing FusesIf fuses continue to fail Replace the fuse. The fuses are located on the motherResetting 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 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