Miller Big Blue 300 PRO Series, Owner'S Manual

Page: 42 / 76

Complete Parts List is available at www.MillerWelds.com
OM-259 355 Page 38
7-2. GFCI Receptacle Information, Resetting And Testing
!
Use GFCI protection when operat-
ing auxiliary equipment. If unit does
not have GFCI receptacles, use
GFCI-protected extension cord. Do
not use GFCI receptacle to power
life support equipment.
!
Unplug power cord before attempt-
ing to service accessories or tools.
1 120 V 20 A AC GFCI Receptacle
2 GFCI Receptacle Test Button
3 GFCI Receptacle Reset Button
4 GFCI Indicator Light (LED)
GFCI Receptacles
GFCI receptacles protect the user from
electric shock if a ground fault occurs in
equipment connected to the receptacle. A
ground fault occurs when electrical current
takes the shortest path to ground (which
could be through a person) rather than fol-
low its intended safe path.
If a ground fault is detected, the GFCI Reset
button pops out, and the circuit opens to
disconnect power to the faulty equipment.
A GFCI receptacle does not protect against
circuit overloads, short circuits, or shocks
not related to ground faults. Reset and test
GFCI receptacle according to the following
procedures.
Resetting/Testing GFCI Receptacle
!
Test GFCI monthly. See Testing
GFCI Receptacle.
!
Do not test or reset GFCI recept-
acles at idle speed/ low voltage or
the GFCI will be damaged and not
provide protection from electric
shock caused by a ground fault.
!
If LED blinks, stop using GFCI re-
ceptacle and have it replaced by a
Factory Authorized Service Agent.
Resetting GFCI Receptacles
If a GFCI fault occurs, stop engine and dis-
connect equipment from GFCI receptacle.
Check for damaged or wet tools, cords,
plugs, etc. connected to the receptacle.
Start engine and operate at Run (weld/
power) speed. Press GFCI Reset button.
Reconnect equipment to GFCI receptacle.
If GFCI Reset button pops out again, check
the equipment and repair or replace if faulty.
Testing GFCI Receptacles
GFCI testing must be done with engine
running at Run (weld/power) speed.
Start engine and operate at Run (weld/
power) speed.
Press the GFCI Test button. The GFCI Re-
set button should pop out.
Press the GFCI Reset button.
Have GFCI replaced by a Factory Au-
thorized Service Agent if any of the fol-
lowing occur:
GFCI does not trip when tested
LED blinks
GFCI does not reset.
1
2
3
4
RotGFCI1 2012 − 05
!
Test and reset GFCI only
at Run speed.