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7-7.
Status/Trouble Lights
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Difficulty establishing a pilot arc may indicate consumables need to be cleaned or replaced.
Light
Power
Pressure/Cup/Temp
Power
Power
Pressure
Pressure
Pressure
Cup
Cup
Cup
Cup
Temperature
Temperature
Temperature
For system troubleshooting see Section 7-8.
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Complete Parts List is available at www.MillerWelds.com
Condition
On
Off
Flashing rate is steady for 15 seconds or until
torch trigger is pressed again, whichever
comes first.
Repetitive flashing rate of two quick cycles,
then a one second pause.
On
Flashing rate is steady for 15 seconds or until
torch trigger is pressed again, whichever
comes first.
Repetitive flashing rate of two quick cycles,
then a one second pause for a 15 second
period.
On
Flashing rate is steady for 15 seconds or until
torch trigger is pressed again, whichever
comes first.
Repetitive flashing rate of two quick cycles,
then a one second pause for a 15 second pe-
riod or until torch trigger is pressed again,
whichever comes first.
Repetitive flashing rate of three quick cycles,
then a one second pause for a 15 second pe-
riod or until torch trigger is pressed again,
whichever comes first.
On
On (indefinitely).
Flashing rate is steady (indefinitely).
Status/Possible Causes
Input power is okay.
When Power light is on, system is normal if
these lights are off.
Input power below 88 volts AC, but has re-
turned to normal.
Input power is below 88 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 tight-
ened, 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 dur-
ing pilot arc possibly due to being stuck.
Check consumables.
Power source overheated (see Section 4-7).
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.
Stalled or locked fan. Clean or replace as
needed.
OM-253555 Page 31