Lincoln Electric SVM153-A service manual Engine Starting Diagnostic Chart

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F-13	TROUBLESHOOTING & REPAIR	F-13
ENGINE STARTING DIAGNOSTIC CHART

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Starting

ENGINE

Upon placing the RUN/STOP switch in the “RUN” position, you should hear a “click” near the engine. This is the FUEL SOLENOID engaging. It should stay engaged. You should also see all 5 ENGINE WARNING LIGHTS come on for about 5 seconds and then go off. Then, operate the START button. ENGINE WARNING LIGHTS WILL COME BACK on then off again. All gauges should be in the NORMAL operating ranges. About 30 seconds after starting the engine, the “inihibit” circuit which prevents ENGINE SHUTDOWN will turn-off. Engine should remain running.

Is the BATTERY

Is there FUEL? charged ENOUGH to N Did engine START? start the ENGINE?

N

N

Y

CORRECT

that problem.

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Does the PULL COIL		Y	Is the SOLENOID	Y	Is the BATTERY	Y
read .3 ohms?			LINKAGE bound-up?		charged?
	N		N		N

Look at wires 224, 262, 405, 270, 5T, 402, 232, 236a, &

236.Also, 403, 232M or 265.

Are the BATTERY

CABLES properly N connected?

N

CORRECT

that problem.

Did you hear the

FUEL SOLENOID

engage?

Y

MAY HAVE ENGINE

PROBLEMS.

MAY HAVE WEAK FUEL					Did engine
SOLENOID OR BAD	N	Did 1 of the WARNING			REMAIN running after
				N
PERIPHERAL PCB.		lights come on?			the 30 second
					INBHIT timer?
			Y

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PERIPHERAL PCB

Look at wires 224,

Did the

Does the HOLD COIL

FUEL SOLENOID

OK

MAY BE BAD.

OK

262

Y

N

read 21 ohms?

engage and REMAIN

engaged?

PERIPHERAL PCB or

BATTERY PCB MAY BE

CORRECT

BAD. ALSO, THE PULL

Y

that problem.

COIL PCB.

Check the WARNING

Look at wires 243,

PERIPHERAL PCB

247, 248, 245,

Did all 5 ENGINE

OK

OK

MAY BE BAD.

LIGHTS.

232f, 232g, 232e,

N

WARNING LIGHTS

232p, 252 & 253.

come on?

Y

CORRECT

that problem.

PERIPHERAL PCB		Did all 5 ENGINE
	N
MAY BE BAD.		WARNING LIGHTS
		go OFF?

CORRECT

that problem.

Y

COMMANDER 500