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57 PB

COMPONENT TESTING

Replace the Electronic Control Board

Replace the User Interface

1.UnplugtheUnit

2.RemovetheFrontCover.(RefertoRoutineMaintenance,Figure401)

3.Removethe4cornerscrewsfromtherearoftheuserinterface.

4.Inspectribboncableforobvioussignsofdamage.

5.Ifribboncableisdamaged,ordamageissuspected,disconnectcablefromUserInterfaceandControlBoard.

6.Payingcarefulattentiontotheribboncablerouting,removetheoldcableandreplacewithanewribboncable.

7.Connectribboncabletothepowerboardanduserinterfaceasrequired.

8.InstallnewUIusingthe4screws.

9.Plugintheunitandverifycontroloperation.(RefertoOperationSection)

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or

installation. Extreme care must be used, if it

becomes necessary to work on equipment with

power applied.

Failure to do so could result in serious injury or

death.

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or

installation. Extreme care must be used, if it

becomes necessary to work on equipment with

power applied.

Failure to do so could result in serious injury or

death.

1.Unplugtheunit

2.RemovetheFrontCover(refertoRoutineMaintenance,Figure401)

3.Removetheunitfromthesleeve.(RefertoFigure502)

4.Removethedischargesensor(takenoteoftheroutingforreinstallation).

5.Ifnecessary,cutwiretiesandremoveone(1)screwelectronicholdertocreateslackinwiring.

6.Removethefour(4)circuitBoardpinsusingneedlenosepliersorothersuitabletool.

7.Installthecontrolboardusingfour(4)newcircuitboardpins.

8.Reinstallthecontrolboardpanel,securewiringasrequired.

9.InstalltheFrontCover(refertoRoutineMaintenance,Figure401

10.Plugintheunitandtesttheunitforproperoperation.Refertooperationsection.

Friedrich Kuhl+ KEQ08A11A User Manual

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