Fronius VarioStar 1500 Instructions De Service page 90

Troubleshooting
No arc after torch trigger is pressed
(continued)
Mains switch is ON, ready indicator is lit up, wirefeeder running
Cause:
Remedy:
Cause:
Remedy:
Cause:
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Torch and hosepack become very hot
Cause:
Remedy:
Mains fuse or automatic circuit breaker trips when torch trigger is pressed
Mains switch is ON, ready indicator is lit up, wirefeeder running
Cause:
Remedy:
Unsatisfactory interval welding result
Cause:
Remedy:
Irregular quality of welding points when spot welding
Cause:
Remedy:
Cause:
Remedy:
operating mode selector switch set to „feeder inching"
select a different operating mode
open circuit in a mains phase
replace mains fuse, check plug, socket and mains cable
earth connection open or not connected properly
check earthing cable and terminal
fault in the power cable in the welding torch
change hosepack
main contactor or stage switch is faulty
contact After-Sales Service
design dimensions of the torch are not sufficient for the task, or the duty
cycle has been exceeded
note the duty cycle and loading limit / use more robust type of torch
fuse/automatic circuit breaker too weak (or wrong type)
use correct fuses as described in technical data / use automatic circuit
breaker with „U" characteristic
interval welding time t1 and/or interval pause t2 set incorrectly
set interval welding time t1 and interval pause t2 correctly using relevant
adjusters
sheets are not lying flush one on top of the other
press the sheets firmly together
surface of workpiece is very dirty
clean surfaces of sheets to be welded
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