Miller Electric 350, 350P manual Measuring Input Capacitor Voltage, Significant DC voltage can

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6-3. Measuring Input Capacitor Voltage

3

1

		!	Significant DC voltage can
			remain on capacitors after
			unit is Off. Always check ca-
			pacitors as shown to be sure
			they have discharged before
			working on unit.
	3	Turn Off welding power source and
	3	disconnect input power.
		disconnect input power.
		Remove case.
		1	Input Capacitor C3 Terminals
	2	2	Input Capacitor C4 Terminals
		3	Voltmeter
		Check input capacitors as shown.
		Measure the dc voltage across the
		positive (+) and negative (−)
		terminals until voltage drops to near
		0 (zero) volts.
		Proceed with job inside unit.
		Reinstall case when finished.

Tools Needed:

5/16 in

221 044-A / Ref. 803 550-A

OM-1327 Page 42

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Contents Description OM-1327Processes File MIG GmawFrom Miller to You Table of Contents − Maintenance &TROUBLESHOOTING − ProgrammingElectric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burnsWelding can cause fire or explosion Fumes and Gases can be hazardousARC Rays can burn eyes and skin Flying Metal or Dirt can injure eyesFalling Unit can cause injury Welding Wire can cause injuryFire or Explosion hazard Moving Parts can cause injuryEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings About Implanted Medical DevicesUNE Décharge Électrique peut entraîner la mort Symboles utilisésIndique des instructions spécifiques LES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion Risque D’INCENDIE OU D’EXPLO LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-1327 Specifications Duty Cycle And OverheatingConnecting To Weld Output Terminals Volt-Ampere CurveInstalling Work Clamp Installing Welding Gun/Cable HolderInstalling Welding Gun Connecting Spoolmatic 15A Or 30A Gun XR Edge guns prior to serial no Connecting XR Edge, XR-A Gun, XR-A Python, Or XR Aluma-ProGun End Gun Liner Wire Outlet Guide Be sure to trim liner to proper extensionPolarity Changeover Information Setting Gun Polarity For Wire Type11/16 Installing Gas Supply Rear PanelInput Voltage Installing Wire Spool and Adjusting Hub TensionElectrical Service Guide Min Input Conductor Size In AWGSelecting Input Voltage 200/230/460 Volt Models Only 18 in 457 mm for airflow Selecting a Location And Connecting 3-Phase Input PowerTools Needed = GND/PE Earth Ground =GND/PE Earth Ground Selection a Location And Connecting 1-Phase Input PowerDisconnect Device Input Power Connections L1L2Threading Welding Wire For MIG Gun Hold wire tightly to keep It from unravelingPressure4321 Indicator Scale 150 mmTurn welding power source Off Threading Welding Wire Through XR GunsFor XR-A Pistol Gun Pulse Indicator Light MIG ModeJog Mode ControlsMIG Gun-On-Demand Pulse MIG Mode Voltage AdjustmentWeld Status Pulse MIG Gun-On-DemandWeld Parameters For MillerWelds.comWeld Parameters For Pulse Mode WeldMIG Welding Mode Weld Bead Setting OM-1327Pulse MIG Welding Mode Low Setting High SettingTimers Crater Fill display can be turned To exit this menu, press the Setup 1 button OM-1327 Setting Hot Start Aluminum Pulse Only ParametersManual Hot Start Mode Rmpt − Ramp TimeSetting Crater Fill Recommended Crater Parameters Recommended Crater Fill Parameters19ga 20ga 05mm 0.9mm System Reset Motor Calibration Function Set Up Push Motor Torque SUP Or Reset rES = Check = Change ~ = Clean = Replace Routine MaintenanceDisconnect power OverheatingSignificant DC voltage can Measuring Input Capacitor VoltageWorking on unit Changing Drive Roll and Wire Inlet Guide Displays a jog wire feed speed OM-1327 Help DisplaysTip Save Jog XXX Wire Feed SpeedHelp MM 350PConnect work clamp to get good metal to metal contact TroubleshootingTemperatures are within acceptable limits see -2and Unit is in an overheated condition see SectionOM-1327 − Electrical Diagram 224 242-B Circuit Diagram For 460V/575V Models 223 926-B Drive Roll And Wire Guide Kits Page Page Your distributor also gives ServiceSupport For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s