11
Troubleshooting table
Welding defects
Problem
Cause
Remedy
• The line fuses burn out and close the line
circuit breaker
• Wrong connection
• Check and follow the instructions for con-
nection
• Short circuit on fan motor
• Repair or replace the motor
• Short circuit on auxiliary transformer wind-
ing
• Check and, if necessary, replace the trans-
former
• The line fuses burn out when the torch but-
ton is pressed
• Wrong connection of the voltage change
connector
• Check and follow the instructions for con-
nection
• Wrong connection of the voltage change
connector
• Check and follow the instructions for con-
nection
• Short circuit on main transformer winding
• Replace transformer
• The line fuses burn out after working for
some time
• Defective circuit
• Replace circuit
•
• Fuses not high enough capacity
• Use fuses of adequate capacity for the line
absorption (see table)
• The welder does not emit current
• Wrong connection
• Check and follow the instructions for con-
nection
• Line fuses burnt out
• Find the cause and replace
• Circuit open on welding cables
• Check the welding cables for breakage
• Welding current unsteady
• Variations of voltage on the line
• Check the line voltage with a voltmeter
• Section of connecting cables too small
• Replace with cables of adequate section
• Loose connections
• Check connections to the power mains and
welding circuit and tighten if necessary
• Welding current insufficient
• Missing power supply phase
• Check the power mains
•
The wire does not advance
• Fuse interrupted
• Electronic control circuit defective
• Gearmotor broken
• Drive roller worn
• Wire-guide sheath defective
• Control point worn
• Replace
• Replace
• Control and replace
• Replace
• Control and replace if necessary
• Replace
Problem
Cause
Remedy
• Porosity (external or internal)
• Defective wire
• Change wire
• Insufficient gas flow
• Adjust flow
• Defective flow meter
• Check flow meter
• Frost on reducer
• Check preheater
• Defective solenoid
• Check
• Wire guide nozzle clogged
• Clean nozzle
• Gas flow holes clogged
• Clean with jets of air
• Drafts of air
• Screen the workplace
• Withdrawal cracks
• Wire or piece dirty or rusty
• Replace wire or clean piece
• Bead too small
• Increase current
• Bead too concave
• Reduce voltage
• Bead too penetrating
• Reduce voltage and current
• Lateral incisions
• Pass speed too high
• Slow down
• Current too low and voltage too high
• Increase wire speed and reduce voltage
• Excessive splashing
• Voltage too high
• Adjust voltage
• Wire guide nozzle clogged
• Clean nozzle
• Torch tilted too much
• Tilt correctly
