B-8
OPERATION
B-8Terminal Strip Connections
Terminal strip TS2 located behind the hinged control
panel on the front of the power source supplies
110-115V AC. A 15 amp circuit breaker protects this
circuit. Note that this 110-115V AC is also available in
the 14-pin connector on the Domestic and Export
models.
To gain access to the terminal strips simply remote
the #10 sheet metal screws from the perimeter of the
welder nameplate. Tilt panel forward so it rests in a
horizontal position. See Table showing Front View of
14-Pin Connector Receptacle for lead number func-
tions.
Machine and Circuit Protection
The power source is thermostatically protected with
proximity thermostats against overload or insufficient
cooling. One thermostat is located on the nose of the
center bottom primary coil and a second thermostat is
attached to the lead connection the secondaries.
Both thermostats are connected in series with 2-4 cir-
cuit. If the machine is overloaded, the primary ther-
mostat will open, the output will be zero, and the
amber thermal protection light will be on.
The fan will continue to run. The secondary thermo-
stat will open either with an excessive overload or
insufficient cooling. The output will be zero and the
amber protection light will be off.
115VAC GFCI RECEPTACLE
(Codes 11038 and higher)
The GFCI receptacle is located near the output studs
and protected by a 15 amp circuit breaker.
Testing the GFCI Receptacle
a.) 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 the power is ON. If there
is no power, go to Troubleshooting.
b) Press the TEST button in order to trip the
device.This should stop the flow of electricity, mak-
ing the lamp or radio shut OFF. Note that the
RESET button will pop out. If the power stays on,
go to troubleshooting. If the power goes OFF, the
GFCI is working properly. To restore power, press
the RESET button.
c) 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.
DC-400