Troubleshooting; General Remarks - Fronius VarioStar 1500 Instructions De Service

Troubleshooting

General remarks

Troubleshooting
Nothing happens when the torch trigger is pressed
Mains switch is ON, but indicators are not lit up
Cause:
Remedy:
Nothing happens when the torch trigger is pressed
Mains switch is ON, fault indicator is lit up
Cause:
Remedy:
Cause:
Remedy:
Nothing happens when the torch trigger is pressed
Mains switch is ON, ready indicator is lit up
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Unsteady arc, severe spattering, pores in the welding material
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
WARNING! An electric shock can be fatal. Before opening up the machine
- Move the mains switch to the "O" position
- Unplug machine from the mains
- Put up an easy-to-understand warning sign to stop anybody inadvertently
switching it back on again
- Using a suitable measuring instrument, check to make sure that electrical-
ly charged components (e.g. capacitors) have been discharged
CAUTION! Inadequate PE conductor connections can cause serious injury
and damage. The housing screws provide a suitable PE conductor connection
for grounding (earthing) the housing and must NOT be replaced by any other
screws which do not provide a reliable PE conductor connection.
there is a fault in the mains lead; the mains plug is not plugged in
check the mains lead, make sure that the mains plug is plugged in
power source overheated/overloaded
allow the power source to cool down
wirefeeder motor overloaded
check wire feed liner, contact tube and wirespool brake setting
torch control plug is not plugged in
plug torch control plug into torch control plug socket
faulty control cable or torch switch
replace control cable or torch switch
faulty control transformer fuse
replace fuse in line with details printed on it
no shielding gas
check the pressure regulator, gas hose, gas solenoid valve, torch con-
nection etc.
contact tube too large or worn out
change the contact tube
operating point not set correctly
adjust to obtain correct ratio between welding voltage and wirefeed speed
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