Troubleshooting - ESAB Warrior 350i MV CC Instruction Manual

7 TROUBLESHOOTING

7 TROUBLESHOOTING
Try these recommended checks and inspections before contacting an authorized service
technician.
Type of fault
No arc.
The welding current is interruppted during
welding.
The thermal protection trips frequently.
Poor welding performance.
"Err" on display in open circuit mode
0463 441 101
Corrective action
• Check that the mains power supply
switch is turned on.
• Check that the mains, welding and
return cables are correctly connected.
• Check that the correct current value is
set.
• Check the mains power supply
miniature circuit breaker (MCB) and
fuses.
• Check whether the overloading
protection has deployed (indicated on
the front).
• Check the mains power supply MCB
and fuses.
• Check that the return cable is correctly
fastened.
• Make sure that you are not exceeding
the rated data for the power source (i.e.
that the unit is not being overloaded).
• Make sure that the operating
temperature for the power source is not
exceeded. (See the TECHNICAL DATA
chapter of this manual.)
• Check that the inside of the power
source is thoroughly cleaned from dust.
(See the MAINTENANCE chapter of
this manual.)
• Check that the welding and return
cables are correctly connected.
• Check that the correct current value is
set.
• Check that the correct wire or electrode
is used.
• Check the mains power supply MCB
and fuses.
• Check the gas pressure in the
equipment connected to the power
source.
• Check the mains power supply MCB
and fuses.
• Check that the specified voltage is
equal to the nominal mains voltage.
• Restart the power source with the main
switch.
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