Miller Electric manual Troubleshooting, Circuit Diagram For AA40GBU/Gas Box Left Hand

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4-3. Troubleshooting

	Trouble	Remedy


	Electrode wire feeding stops or feeds er-	Readjust hub tension and drive roll pressure.
	ratically during welding.
	ratically during welding.	Change to correct size drive roll.
		Change to correct size drive roll.

		Clean or replace dirty or worn drive roll.

		Incorrect size or worn wire guides.

		Replace contact tip or liner. See gun Owner’s Manual.

		Remove weld spatter or foreign matter from around gun nozzle opening.

		Check and secure motor plug connection.

		Have Factory Authorized Service Agent check drive motor.

	Motor runs slowly.	Reduce load.

		Check for correct input voltage.

	Motor runs at full speed regardless of	Have Factory Authorized Service Agent check digital wire drive motor Tachometer board and encoder.
	wire speed setting.

SECTION 5 − ELECTRICAL DIAGRAM

221 660-A

Figure 5-1. Circuit Diagram For AA40GBU/Gas Box (Left Hand)

OM-227 674 Page 18

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Contents Description OM-227 674BProcesses File Advanced Manufacturing SystemsFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer unIncendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures graves’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaquesOverall Dimensions And Mounting Hole Layout SpecificationsAdapter Bracket Typical Equipment Location Installing Drive RollsInstallation RemovalInstalling PD Continuous Wire Guides Installing PD continuous wire guides with PD drive rollsInstalling Non-PD Old Style Wire Guides Installing wire guides with non- PD old-style drive rollsInstalling gun with Accu-Mate connection Installing Welding GunInstalling gun without Accu- Mate connection Mounting Motor And Connecting Gas Hose And Weld Cable Drive motor must be isolated from weld potentialPlug Connections Threading Welding Wire And Adjusting Pressure Drive Setting PowerjogBrush Inspection And Replacement Routine MaintenanceDisconnect power before maintaining Troubleshooting Circuit Diagram For AA40GBU/Gas Box Left Hand− Parts List Drive Assembly, Wire Drive Assembly, Wire -1Item 219Guides for Old Style Drive Service SupportOwner’s Record Miller Electric Mfg. Co