Overload Protection | Miller Electric 300 P instruction

8-9. Overload Protection

3 7

4

56

	Y Stop engine.
	. When a circuit breaker, supple-
		mentary	protector,	or	fuse
		opens, it usually indicates a
		more serious problem			exists.
		Contact	Factory	Authorized
		Service Agent.
	1	Fuse F1
	F1	protects the stator exciter wind-
	ing from overload. If F1 opens, weld
	and generator power is low or stops
	entirely.
	2	Circuit Breaker CB1 (Not
		Shown)
	3	Supplementary Protector CB2
	4	Supplementary Protector CB3
	5	Supplementary Protector CB7
	6	Supplementary Protector CB8
	7	Circuit Breaker CB9
	CB1 protects the engine battery cir-
	cuit. If CB1 opens, the engine will not
	crank. CB1		automatically		resets
1	when the fault is corrected.

CB2 protects the engine wiring har- ness. If CB2 opens, the engine will not crank.

CB3 protects part of the weld control wiring harness. If CB3 opens, weld and generator power output stops.

CB7 protects the 115 volt ac output to remote receptacle RC14. If CB7 opens, 115 volt output to RC14 stops.

CB8 protects the 24 volt ac output to remote receptacle RC14. If CB8 opens, 24 volt output to RC14 stops.

Press button to reset supplementary protector.

CB9 protects the throttle solenoid against overload. If CB9 opens, the engine does not automatically idle down. Check the linkage and sole- noid. CB9 automatically resets.

803 562 / 803 566

OM-4433 Page 37

Image 41

Miller Electric 300 P manual Overload Protection

Contents

Processes OM-4433218 314KDescription File Engine Drive From Miller to You Table of Contents Warranty Arc Welding Hazards Symbol Usage Engine Hazards Compressed Air Hazards California Proposition 65 Warnings Principal Safety StandardsEMF Information Radiation can cause interference − Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer LES Fumées ET LES GAZ peuvent être dangereux DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un in- cendie ou une explosionDES Pièces Chaudes peuvent provoquer des brûlures graves LE Bruit peut affecter l’ouïe ’AIR Comprimé peut provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électrique Pour les moteurs à essence LE Soudage À L’ARC risque de provoquer des interférencesPour les moteurs diesel Boulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone Std − Definitions− 50 h Std Manufacturer’s Rating Label Symbols And Definitions Dimensions, Weights, And Operating Angles − SpecificationsWeld, Power, And Engine Specifications MIG Mode Stick ModeTIG Mode Volt-Ampere Curves Exceeding duty cycle can damage unit and void warranty Curve shows typical fuel use under weld or power loadsFuel Consumption Duty Cycle And Overheating 150 125 100 AC Generator Power Curve Installing Welding Generator − InstallationSee -2for lifting eye rating See -2for mounting information Grounding Mounting Welding Generator Tools Needed 1/2 Installing Exhaust PipeStop engine and let cool Point exhaust pipe in desired di Connecting The Battery Activating The Dry Charge Battery If ApplicableDo not overfill battery cells Close door after connecting battery Engine Prestart Checks Coolant Recovery TankFuel Do not use gasoline. Gasoline will damage engine Oil Stick and TIG Welding Connecting To Weld Output TerminalsMIG and Fcaw Welding Stop engine 150 ft 200 ft 250 ft Selecting Weld Cable Sizes350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Stop engine before Socket Information Connecting To Remote 14 Receptacle RC14 Front Panel Controls See Section − Operating Welding Generator Description Of Front Panel Controls See Section Process/Contactor Switch Settings Process/Contactor Switch Lift-Arc Start Method Touch Lift-ArcStart ProcedureDo not Strike Like a Match Lift-Arc t TIG Remote Voltage/Amperage Control At least once a month, run engine at Generator Power Receptacles− Operating Auxiliary Equipment Routine Maintenance − Maintenance & Troubleshooting Maintenance Label By the warranty Servicing Air CleanerTo clean air filter Do not clean housing with air hose Servicing Engine Cooling System Inspecting And Cleaning Optional Spark Arrestor MufflerStop engine and let cool. Reinstall cleanout plug Maximum Adjusting Engine Speed On Standard ModelsDo not set engine speed higher Stop engine. Close door Weld/Power Speed Adjust- ment Engine Speed AdjustmentEngine Speed No Load Rpm max 62.6 Hz 1250 rpm 41.6 Hz To change oil and filter Servicing Fuel And Lubrication SystemsTo replace primary canister fuel filter To drain water from fuel system Overload Protection Replace Damaged Brushes Checking Generator Brushes Help 25 Display Voltmeter/Ammeter Help DisplaysHelp 20 Display Welding Troubleshooting Engine Generator Power Check for obstructed throttle solenoid Material Thickness Reference Chart Circuit Diagram For Welding Generator − Electrical Diagrams 219 228−D Welding Generator − RUN-IN ProcedureWetstacking Procedure at less than Run-In Procedure Using Load BankStop engine Do not touch hot exhaust From flammables Do not Perform Bank/grid Run-In Procedure Using Resistance GridFrom flammables Do not perform run-in Has this symbol − Generator Power GuidelinesSelecting Equipment Grounding Generator To Truck Or Trailer Frame How Much Power Does Equipment Require? Grounding When Supplying Building SystemsEarth ground if supplying Use ground device as stated Electrical codes Approximate Power Requirements For Farm/Home Equipment Approximate Power Requirements For Industrial MotorsIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running Watts Contractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor Equipment How Much Power Can Generator Supply? Power Required To Start MotorSingle-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 = Starting Amperage Typical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord Possible 108 -2 107 101 102 103 100 104 106 105 − Parts List109 81 Fig 7372 71 67 66 65 PC3 Dia Part Description Quantity Mkgs Batt Panel, Front w/Components -1Item Panel, Front w/Components FUEL/HM Control Panel Generator Rectifier Assembly Wiring Harnesses Support ServiceYour distributor also gives Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s