Resetting Overloads, Check the overload | Conair MPA, MPW manual

RESETTING OVERLOADS

The pump motor overload is located inside the unit’s electri- cal enclosure.

1 Disconnect and lockout the main power.

2 Open the electrical enclosure door. Turn the screw on the front panel counterclockwise to open.

3 Check the overload.

If the yellow button is out, the overload has tripped. Press the blue button to reset the overload. Verify that the overload trip point does not exceed the FLA for the pump.

REPLACING THE PUMP OVERLOAD

1

2

3

4

Disconnect and lockout the main power.

Open the electrical enclosure door. Turn the screw on the front panel counterclockwise to open.

Locate the pump overload module attached

to the pump motor starter.

Disconnect the three power leads from the over- load module to the pump motor. Note the placement of each lead and label as needed.

	5
MOTOR CON-	6
	7
	8
Motor overload	9
	9

Disconnect auxiliary wiring on the overload module.

Remove the overload module.

Loosen the three screws that connect the overload module to the motor con- tactor. Pull the overload module down to release it from the starter.

Reverse these steps to install the new overload module.

Set the module reset mode to M for manual.

Set the proper FLA trip point.

Do not exceed the FLA for the pump motor.

6-14TROUBLESHOOTING

microKool Portable Chillers

UGH004/0999

Image 70

Conair MPA, MPW manual Resetting Overloads, Check the overload, Locate the pump overload module attached

Contents

Page Date Manual Number UGH004/0999 Serial numbers Model numbers Table of Contents Introduction Troubleshooting 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 Compressors Specifications MPW Water Cooled Psi Pressure Specifications MPA AIR Cooled MPA-5 Freezing Points of Aqueous Ethylene Glycol Solutions Freeze Protection Requirements Installation Boxes UnpackingMicroKool Portable Chillers come fully assembled Make sure the installation area provides Preparing for InstallationInstall 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 sealant Connecting Main Power Supply Open the unit’s electrical enclosure Turn on the condenser water supply MPW Testing the InstallationApply power to the unit Units and check for leaks. If any leaks appear, stop Entering Setpoint Deviation Parameters Initial Setup Dip switch Configuration Changing Temperature Units Open the electrical enclosure Change Dip Switch 1 to Select a new passcode using Disconnect and lock out main power to the unitOpen the electrical enclosure Set dip switch 3 to on Setpoint adjustment buttons Open 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 button Set dip switch 5 to Press the RUN button to save the control point Installing Auto Start Feature Insert the two power leads from the device When Auto Start is enabled Set dip switch 4 to the on positionTo 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 address Operation PC-1 Control Features Setpoint display PC-2 Control Features Pumpdown On/Off To lower the control panel Positioning Control PanelTo raise and swivel the control panel To detach the PC-2 control panel Entering a Passcode Press Setpoint to select the parameter you want to change Starting the Chiller Enter the passcode To shut down the unit Press Stop Using Pumpdown FeatureStopping the Chiller Press Button to turn on Pumpdown Performing AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Inspect power cords, wires and electrical connections Quarterly every 3 months Cleaning Evaporators Cleaning Condensers Locate the fill port at Back of the chiller Refilling the TankTo fill the reservoir Checking Refrigerant Charge If the charge is low, recharge the system Press To shut down the chiller Set dip switches 3Performing System Tests Then open the electrical enclosure KEY/DISPLAY Test Press any key to display the first test menus Input TestConnect all inputs to the system Select the Input Test menu Connect 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 key Wait until the control displays don or bad Exit Calibration ModePress the up key to begin calibrating Press Select Index through test menus to the operating log Logging Operating HoursExit the Operating Hours Log Troubleshooting Verify that you have manuals for other equip Before BeginningFEW Words Messages shown on the control panel. These HOW to Identify Cause of a Problem Is the required water flow Supplied to the pumpMotor? Greater than the pump’s Is 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 units Freeze Stat Input is open Is there sufficient fluid Is the freezestat settingInstalled correctly? Flow through he evapora Is 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 mother Check 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, call Appendix A-2 SPI Commands Supported by Conair Microkool SPI Command Pairs SPI Status Words Status, Process Status, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5