Troubleshooting - ESAB Gun Master 400 Manual De Instrucciones

sectIon 4
step #3
•
install the switch and reposition handle and
switch housing.
•
reinstall switch housing mounting screws

4.5 - TROUBLESHOOTING

PROBLEM
poor Wire Feed
short tip Life
gun overheating
switch malfunctioning
Weld porosity
MounTing ScreWS
POSSIBLE CAUSE
• conduit liner clogged or kinked
• incorrect liner size or contact tip
• liner cut too short and not seating properly in gas diffuser
• drive rolls too tight resulting in scoring of welding wire
• welding wire dirty, rusty or too much cast
• drive rolls too tight resulting in scoring of welding wire
• welding wire dirty, rusty or too much cast
• uncoated wire being used, increasing usage
• wrong tip size
• over torch rated duty cycle
• loose retaining screw on quick connect block
• insufficient gauge power cable and/or ground cable
• loose connector cones and/or cone nuts
• gun being run beyond its amperage range
• electrical malfunction in power source
• bad connection of leads to switch terminals
• spatter built up between lever and switch housing
• contacts dirty in switch
• switch housing screws loose
• broken or worn switch lead
• spatter built up in nozzle blocking gas
• leaks in gas hose or improper connection
• o-rings on power pin are cut or damaged
• inner tube loose from connector cone
• poor wire feed (see above)
• improper shielding gas or welding wire
• rusty or poor quality welding wire
• parent metal rusty or contaminated or high in sulphur content
• flow improperly set
8
maIntenance
SWiTch houSing
SWiTch