Status/Trouble Lights; Checking Shield Cup Shutdown System - Hobart AIRFORCE 700I User Manual

6-3. Status/Trouble Lights

.
Difficulty establishing a pilot arc may indicate consumables need to be cleaned or replaced.
Light
Power On
Off
Pressure/Cup/T emp
Flashing rate is steady for 15 seconds or until torch trigger
Power
is pressed again, whichever comes first.
Repetitive flashing rate of two quick cycles, then a one
Power
second pause.
Pressure On
Flashing rate is steady for 15 seconds or until torch trigger
Pressure is pressed again, whichever comes first.
Repetitive flashing rate of two quick cycles, then a one
Pressure
second pause for a 15 second period.
On
Cup
Flashing rate is steady for 15 seconds or until torch trigger
Cup
is pressed again, whichever comes first.
Repetitive flashing rate of two quick cycles, then a one
second pause for a 15 second period or until torch trigger
Cup
is pressed again, whichever comes first.
Repetitive flashing rate of three quick cycles, then a one
Cup second pause for a 15 second period or until torch trigger
is pressed again, whichever comes first.
On
Temperature
On (indefinitely)
Temperature
Flashing rate is steady (indefinitely).
Temperature
For system troubleshooting see Section 6-7 and Section 6-8.

6-4. Checking Shield Cup Shutdown System

1
.
A complete Parts List is available at www.MillerWelds.com
P O
V
P R
C U
T E
Condition
.
Power must be reset whenever the cup
shutdown system is activated. Always
turn Off power when changing or
checking consumables. Do NOT
overtighten torch shield cup. Gently
finger tighten cup onto torch.
W E R
E S S U R E
P
M P
Status/Possible Cause
Input power is okay.
When Power light is on, system is normal if these lights
are off.
Input power below 156 volts AC, but has returned to
normal.
Input power is below 156 volts AC.
No or low [below 40 psi (276 kPa)] input pressure.
Regulated pressure in the unit is low. Check torch for
leaks. Check input pressure to unit is between 90 to 120
psi (621 to 827 kPa).
Regulated pressure in the unit is high. Check input pressure
to unit is between 90 to 120 psi (621 to 827 kPa).
Torch cup is loose or off. Once cup is tightened, unit
power must be cycled off and back on again.
No arc was established. Check consumables or torch.
No pilot arc established possibly due to a loss of current.
Check consumables.
Consumables in torch failed to separate during pilot arc
possibly due to being stuck. Check consumables.
Power source overheated (see Section 4-2). Stop cutting
and allow unit to cool down.
Power source temperature sensors may have failed or
ambient temperature is below -22° F (-30° C).
Power source temperature sensor provided inaccurate
readings, but returned to normal. Unit power must be
cycled off and back on again.
1 Torch Shield Cup
Turn Power On and loosen shield
cup. If shutdown system works
properly, Cup light comes on. If not,
immediately turn Off power and
have Factory Authorized Service
Agent check unit.
If system works properly, retighten
cup and reset power.
Ref. 801 300-A
OM-244 013 Page 27