Lincoln Electric 455 manual Exhaust louvers Machine won’t weld, can’t get any

E-4			TROUBLESHOOTING		E-4
		Observe all Safety Guidelines detailed throughout this manual
TROUBLESHOOTING GUIDE					Observe Safety Guidelines
				detailed in the beginning of this manual.
PROBLEMS			POSSIBLE AREAS OF		RECOMMENDED
(SYMPTOMS)			MISADJUSTMENT(S)		COURSE OF ACTION
				OUTPUT PROBLEMS
	Wire feeder won’t work. No lights,		1.	Circuit breaker CB1 (on case
	apparently no power to wire feeder.			front) may have opened.
				Reset.
			2.	Control cable between the
				power source and wire feeder
				is “open”. Check continuity on
				all 5 leads from end to end in
				the control cable.
			3.	Check for 40 volts DC on pins
				D (+40) and E (common) of
				the Wire Feeder Receptacle.
				If 40 volts DC is not present,
				and CB1 is reset, contact an
				authorized Lincoln Electric
				Service facility.
	Thermal LED is lit.		1.	Fan thermostat has opened. Check
				for proper fan operation. (Fan should
				run whenever main power is on.)
				Check for material blocking intake or	If all recommended possible areas
				exhaust louvers, or for excessive dirt
					of misadjustments have been
				clogging cooing channels in machine.
					checked and the problem persists,
			2.	Secondary rectifier thermostat has
					contact your local Lincoln
				opened. After machine has cooled,
				reduce load, duty cycle, or both.	Authorized Field Service Facility.
				Check for material blocking intake or
				exhaust louvers.
	Machine won’t weld, can’t get any		1.	Input voltage is too low or too high.
	output. (CR1 will not pull in.)			Make certain that input voltage is
				proper, according to the Rating Plate
				located on the rear of the machine.
			2.	If the Thermal LED is also lit, see
				“Yellow Thermal LED is Lit” section.
			3.	Primary current limit has been
				exceeded. Possible short in output
				circuit. Turn machine off. Remove all
				loads from the output of the machine.
				Turn back on. If condition persists,
				turn power off, and contact an autho-
				rized Lincoln Electric Field Service
				facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact your local authorized Lincoln Electric Field Service Facility for technical assistance.

POWER WAVE 455 STT