Hobart Welding Products 700I, HP-70 Status/Trouble Lights, Checking Shield Cup Shutdown System

.A complete Parts List is available at www.MillerWelds.com

6-3. Status/Trouble Lights

. Difficulty establishing a pilot arc may indicate consumables need to be cleaned or replaced.

		V POWER
		PRESSURE
		CUP
		TEMP
Light	Condition		Status/Possible Cause
Power	On		Input power is okay.
Pressure/Cup/Temp	Off		When Power light is on, system is normal if these lights
			are off.
Power	Flashing rate is steady for 15 seconds or until torch trigger		Input power below 156 volts AC, but has returned to
	is pressed again, whichever comes first.		normal.
Power	Repetitive flashing rate of two quick cycles, then a one		Input power is below 156 volts AC.
	second pause.
Pressure	On		No or low [below 40 psi (276 kPa)] input pressure.
	Flashing rate is steady for 15 seconds or until torch trigger		Regulated pressure in the unit is low. Check torch for
Pressure	is pressed again, whichever comes first.		leaks. Check input pressure to unit is between 90 to 120
			psi (621 to 827 kPa).
Pressure	Repetitive flashing rate of two quick cycles, then a one		Regulated pressure in the unit is high. Check input pressure
	second pause for a 15 second period.		to unit is between 90 to 120 psi (621 to 827 kPa).
Cup	On		Torch cup is loose or off. Once cup is tightened, unit
			power must be cycled off and back on again.
Cup	Flashing rate is steady for 15 seconds or until torch trigger		No arc was established. Check consumables or torch.
	is pressed again, whichever comes first.
	Repetitive flashing rate of two quick cycles, then a one		No pilot arc established possibly due to a loss of current.
Cup	second pause for a 15 second period or until torch trigger		Check consumables.
	is pressed again, whichever comes first.
	Repetitive flashing rate of three quick cycles, then a one		Consumables in torch failed to separate during pilot arc
Cup	second pause for a 15 second period or until torch trigger		possibly due to being stuck. Check consumables.
	is pressed again, whichever comes first.
Temperature	On		Power source overheated (see Section 4-2). Stop cutting
			and allow unit to cool down.
Temperature	On (indefinitely)		Power source temperature sensors may have failed or
			ambient temperature is below -22°F (-30°C).
	Flashing rate is steady (indefinitely).		Power source temperature sensor provided inaccurate
Temperature			readings, but returned to normal. Unit power must be
			cycled off and back on again.

For system troubleshooting see Section 6-7 and Section 6-8.

6-4. Checking Shield Cup Shutdown System

. 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.

1

1Torch 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

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