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C-1
MAINTENANCE
C-1
ELECTRIC SHOCK can kill.
• Have an electrician install and ser-
vice this equipment.
• Turn the input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
GENERAL MAINTENANCE
1. The fan motor has sealed bearings which require no
service.
2. In extremely dusty locations, dirt may clog the air
channels causing the welder to run hot. Blow out
the welder at regular intervals. The side panels can
be removed even when the machines are stacked.
POWER RECTIFIER REPLACEMENT
Refer to the troubleshooting section “Power Rectifier
Bridge Assembly Checking Procedure” if a rectifier fail-
ure is suspected.
NOTE: Since proper material and correct assembly
procedures are critical, field disassembly of the power
rectifier bridge sections can do more harm than good.
Return a defective rectifier bridge section (or the entire
bridge) to the factory for repairs.
TESTING THE GFCI RECEPTACLE
Turn the welder ON. Press the reset button fully. Plug
a lamp or radio into the GFCI (and leave it plugged in)
to verify that power is ON. If there is no power, go to
the TROUBLESHOOTING section.
Press the TEST button in order to trip the GFCI device.
This should stop the flow of electricity, making the lamp
or radio shut OFF. Note that the RESET button will pop
out. If the power stays on, go to the TROU-
BLESHOOTING section. If the power goes OFF, the
GFCI is working properly. To restore power, press the
RESET button.
Press the TEST button (then RESET button) every
month to assure proper operation.
NOTE: The GFCI receptacle is in a 115V circuit where
the neutral is floating with respect to ground.
Consequently, if a GFCI tester is plugged into the GFCI
receptacle, the tester will show that there is an “open
ground”. This indication of an “open ground” is normal
and the GFCI will function properly in the event of a
ground fault current as the GFCI is designed to do.
E500
WARNING