Lincoln Electric IM557 manual No control of wire feed, Ters on wire feeder display do not, Board

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E-4	TROUBLESHOOTING	E-4

	Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

7. No control of wire feed.	a. Problem with serial communications.	a. If WFS and preset Volts/Trim parame-
		ters on wire feeder display do not
		match those on power source display,
		see Problem 14.
	b. Defective wire feed motor tach or	b. Measure voltage across pin 2 (+) of J3
	control PC Board.	and pin 3 (-) of J3 on PC board with
		motor running. If voltage is 1.5-3.5V
		then replace control PC board (see
		Procedure for Replacing PC Boards).
		If not, then replace tachometer.

8. No wire feed, solenoid, or arc volt- a. Faulty gun or gun trigger switch.	a. Remove gun. Check continuity
age. LED display indicated	between trigger pins with trigger
Synergic 7 has input power.	closed. If no continuity repair or
	replace gun.
b. Defective control PC board or	b. Remove gun. Check voltage across
gun connector.	trigger sockets on gun connector.
	If voltage > ± 11 VDC then gun is
	defective.
	If voltage is < ± 11 VDC then check
	the voltage across pin 2 (+) and pin 8
	(-) of connector J1 on control PC
	board.
	If the voltage is still < ± 11 VDC then
	replace control PC board. (See
	Procedure for replacing PC boards).
	Otherwise, either the gun connector or
	wiring harness is faulty.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

SYNERGIC 7 & 7H

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Contents Synergic 7 and 7H Safety Mar ‘95Electric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Mar. ‘93Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationTable of Contents Type K631-3 K631-4 Wire Speed Range InstallationTechnical Specifications Synergic 7 and 7H Size & Weight Without Wire Stand With K377 Wire StandGeneral Description Standard FeaturesWire Drive Features Recommended Processes and EquipmentControl Features Y P a D a N D D I S P L a Y Description RUN-IN WFSSafety Precautions Electric Shock can killSteel Wire Sizes Roll Procedure to Install Drive Roll and Guide TubesWire Feed Drive Roll and Guide Tube Kits Aluminum Wire SizesFor GMA Gun Cables Gun Cable Connection Wire Feeder to GunGun and Cable Assemblies Gmaw GunsGmaw Shielding Gas Shut off shielding gas supply when not in useSynergic 7 Water Connections for Water- Cooled Guns Cylinder may explode if damagedElectrical Installation Warning Current Optional Features InstallationWork Cable 60% Duty Cycle Up to 100 ft Length 30mInstallation Operation Mode SelectionPower-Down Save Operating InstructionsPreset voltage/trim may be adjusted Display Control KeysCold Feed Procedure Selector Switch Step Trigger Mode SelectionDual Procedure Remote Control K1449-1 Memory Ammeter SelectionWire Loading Figure B.1a Threaded Locking CollarInnershield Coils Cut the tie wires at this time To remove the wire reel from its shaft, graspKnob so it seats into the shaft when released Coil tie wiresFeeding Electrode READI-REELS a K438 READI-REEL Adapter Must be UsedIdle Roll Pressure Setting Gas Guard Regulator SettingMaking a Weld Wire Reel ChangingWire Feed Overload Protection Explanation of Prompting Error Messages Grounding Lead ProtectorAccessories Optional FeaturesUniversal Wire Reel Stand K1524-1 60 LB .2 KG Coil Adapter K1504-1READI-REEL Adapters MISC. Options K179 type vacuum unit not recommended for use with SynergicAvoiding Wire Feeding Problems MaintenanceMaintenance Routine Maintenance1TROUBLESHOOTINGE-1 Locate Problem SymptomTroubleshooting Ing WeldingIng and gas flow rate is proper ReplaceDefective wire feed motor tach or No control of wire feedTers on wire feeder display do not Connector J1 on control PCSpeed does not change when Run-in and weld speeds are set Wire feed motor runs and solenoid Power source is defectiveWiring harness or Control PC Or there may be a problem withProblem with wire feeder harness Meters on wire feeder display doNot match those on power Remote control kit must be usedTroubleshooting Display. If not, refer to Problem Dure switch Be connectedBetween procedures a and B Wiring harness, or Control boardSwitch between procedures a Local dual procedure switchDual procedure switch is used to Faulty communication betweenTroubleshooting HXX Procedure for Replacing PC Boards Electric Shock can kill Diagrams Wiring Diagram SynergicInput Connection Diagram Electric Shock Can KillDimension Print W I R E R E E L S T a N DSynergic 7 & 7H Synergic 7 & 7H Synergic 7 & 7H Synergic 7 & 7H Precaucion Warnung