Fronius VarioStar 1500 Instructions De Service page 91

Troubleshooting
Insufficient penetration when spot welding
(continued)
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
The following faults can only be rectified by After-Sales Service. Please contact After-
Sales Service, quote the power source serial number and give a detailed account of the
fault.
Unsteady arc, severe spattering, pores in the welding material
Cause:
Remedy:
Wirefeed speed cannot be adjusted
Wirefeeder motor not running
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
No arc after torch trigger is pressed
Mains switch is ON, ready indicator is lit up, wirefeeder running
Cause:
Remedy:
Operating mode selector switch does not function
Cause:
Remedy:
spot-welding time too short
increase spot-welding time using the spot-welding adjuster
spot welding power too low
move stage switch to next higher setting (possibly use CO2 as shielding
gas)
wirefeed speed too low
increase wirefeed speed
WARNING! Operating the equipment incorrectly can cause serious injury and
damage. The following faults must only be rectified by Fronius-trained quali-
fied personnel! Pay particular attention to the "Safety rules" section.
phase missing from mains side
check mains fuses, mains socket and plug, voltage on power source main
contactor; change contactor if necessary
faulty wirefeed speed adjuster
replace MR26A PCB
control faulty
replace MR26A PCB
wirefeeder motor faulty
replace wirefeeder motor
main contactor or stage switch is faulty
replace contactor/stage switch
control or switch faulty
replace MR26A PCB
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