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No welding current
Mains switch is ON, indicator for selected operating mode is lit up, malfunction indicator
flashes
Cause: Fault in power module
Remedy: Switch machine off and back on again; if the error keeps on occurring -
send machine in for service
No welding current
After the machine is switched on, all indicators are permanently lit up (longer than 2
seconds)
Cause: Short-circuit (secondary side)
Remedy: Stop the short-circuit (disconnect the rod-electrode cable or earthing
cable from the current socket with the bayonet latch. If the error keeps on
occurring - send machine in for service
Poor ignition characteristics in rod-electrode welding
Cause: Wrong welding process selected
Remedy: Select the welding process "Rod-electrode welding" or "Rod-electrode
welding with CEL-electrode"
Arc sometimes breaks during welding
Cause: If the TIG welding process is selected, the TIG comfort-stop parameter is
set to too low a value
Remedy: In the set-up menu, set the TIG comfort-stop parameter to a higher value
Cause: Arc-burning voltage of electrode too high (e.g. grooved electrode)
Remedy: If possible, use different type of electrode or a machine capable of deliver-
ing greater welding current
Cause: Mains undervoltage
Remedy: Measure mains voltage on machine, increase the cross-sectional area of
the supply lead
Cause: Wrong welding process selected
Remedy: Select the "TIG welding" or "TIG pulsed arc welding" process
Rod-electrode sometimes sticks
Cause: "Arc-force" parameter (Rod-electrode welding) or "Characteristic" parame-
ter (Rod-electrode welding with CEL-electrode) is set to too low a value
Remedy: In the set-up menu, set the "Arc-force" parameter (or "Characteristic"
parameter) to a higher value
Mains fuse and/or safety cut-out has tripped
Cause: Mains fuse too weak; incorrect safety cut-out
Remedy: Insert correct fuse (see technical data)
Cause: Mains fuse is tripped under no-load conditions
Remedy: Machine should be serviced
Loud bang
in some cases the mains fuse or automatic circuit-breaker is tripped as well
Cause: Varistor (overvoltage protector) has been tripped; mains voltage error
Remedy: Replace the varistor - may only be done by skilled, trained personnel -
otherwise send machine to After-Sales Service
Troubleshooting
TP 1500, TP 1500
RC, TP 1500 TIG
(continued)