Surface of auto-transformer housing feels hot
Permitted duty cycle exceeded
Turn mains switch of the auto-transformer to "O" position, allow au-
to-transformer to cool
The connected welding machine is drawing too much current
Check the current consumption of the connected welding machine
Unsuitable installation location
Change installation location (ensure air can move unhindered
through openings in housing)
Ambient temperature too high
Reduce ambient temperature or change installation location
Housing interior dirty
Open auto-transformer and clean with compressed air
Mains voltage too high
Check voltage and correct mains supply
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Asymmetric output voltage
Incorrectly connected mains cable/mains plug
Connect the mains cable neutral and phase conductors correctly/
attach a new mains plug/ contact After-Sales Service (replace the wi-
ring terminal)
Mains switch - break/contact fault
Contact After-Sales Service (replace the mains switch)
Damaged mains cable/PE conductor break/faulty wiring terminal
Replace mains cable/contact After-Sales Service (replace wiring ter-
minal)
Auto-transformer connected asymmetrically
Connect auto-transformer symmetrically
Wiring terminal - break/contact fault
Contact After-Sales Service (fix/replace the wiring terminal)
Cause:
Remedy:
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