Weldmatic 175 [internal wirefeeder] - BJH

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Operators Manual9 External Trouble ShootingIf the following checks do not identifythe fault condition, the equipmentshould be returned to a WIA Serviceagent. Phone 1300 300 884 for detailsof your nearest service agent.9 External Trouble ShootingPower source has no output and nowirefeed when gun switch is closed :‘OPERATE’ switch is not illuminated1 Check equipment is connected to afunctional mains power outlet. Test outletusing a known working appliance.‘OPERATE’ switch is illuminated1 The gun switch circuit may be incomplete.• Check the gun switch for continuitywith an ohm meter when the switchis pressed. Replace if faulty• Check the 2 pin receptacles in Euroadaptor are making contact with themating pins from the gun Euro end.2 Power source may have overheated.• The Weldmatic 175 welding powersource incorporates an in-builtover-temperature thermostatwhich will trip if the welding loadexceeds the operating duty cycle.The ‘OVERLOAD’ light will beilluminatedwhen the gun is switchedon. The thermostat will resetautomatically - do not switch theequipment off as the cooling fan willassist the resetting of the thermostat• If problem persists after the cool downperiod, call your WIA service agent.Power source has low weld output1 Check all electrical connections in thewelding current circuit, including weldcable, work clamp and gun/cable assembly.Circuit breaker trips during welding1 Check the rating of the mains supplycircuit breaker. The Weldmatic 175should be supplied from a 16 Amp orlarger circuit breaker.Unsatisfactory Welding Performanceand ResultsErratic arc characteristics caused by poorwirefeedErratic wirefeed is the MOST LIKELY cause offailure in all Gas Metal Arc Welding. It shouldtherefore be the first point checked whenproblems occur.1 Refer to the points in ‘Wirefeed’ inSection 82 Check if the consumable wire is slippingin the drive rolls. Replace the feed roll ifit is the incorrect size or is worn3 Check that gun cable liner is not tooshort and is fitted correctly. Refer topage 24 for fitting instructions.Constant poor arc characteristicsCheck that the:1 Correct polarity has been selected forwork and weld cables (refer page 8)2 Shielding gas is correct for theconsumable wire in use (refer page 10)3 Welding circuit is making good electricalconnection. Ensure that the work clampis securely tightened onto the work pieceso that good electrical contact is achieved16Quality • Reliability • Performance
Weldmatic 1754 All connections in the external weldingcircuit are clean and tight. Problems mayshow as hot spots5 Work piece surface is not contaminated.Water, oil, grease, galvanising, paint,or oxide layers can severely disturb thewelding arc and result in a poor weld.Porosity in weld caused by lack ofshielding gas1 Check that the correct gas flow rate hasbeen set (refer page 10)2 Check for leaks in the gas hose. Replaceif leaking3 Check for leaks in gun/cable assembly,eg. fractured gas hose, broken or missing‘O’ rings. Replace as required4 Check the gun nozzle is free from spatterand is firmly attached to the welding gunto ensure that no air is being drawn intothe shielded area.Model No CP122, Iss A 07/07 17
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Weldmatic 175 [internal wirefeeder] - BJH

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