Hobart Welding Products HWC-115A manual Troubleshooting, Trouble Remedy

4-2. Troubleshooting

	Trouble	Remedy
Pressing gun trigger does not ener-		Secure plug PLG4 in 115 volts ac receptacle (see Sections 2-5).
gize weld control or welding wire.
		Secure gun plug in Gun Control receptacle RC3 on weld control (see Section 2-2).
		Check fuse F1 and replace if necessary (see Section 4-1).
		See Troubleshooting Section of gun and/or welding power source Owner’s Manual.
For models without optional contactor		Secure plug PLG5 in 5 pin receptacle on welding power source (see Section 2-6).
control: Pressing gun trigger feeds
wire but does not energize welding		See Troubleshooting Section of welding power source Owner’s Manual.
wire.
For models with optional contactor		See Troubleshooting Section of welding power source Owner’s Manual.
control: Pressing gun trigger feeds
wire but does not energize welding
wire.
Pressing gun trigger energizes wire,		See Troubleshooting Section of gun Owner’s Manual.
but wire does not feed.
Erratic weld output.		Secure plug PLG4 in 115 volts ac receptacle (see Sections 2-5).
		Secure gun plug in Gun Control receptacle RC3 on weld control (see Section 2-2).
		Secure plug PLG5 in 5 pin receptacle on welding power source (see Section 2-6).
		See Troubleshooting Section of gun and/or welding power source Owner’s Manual.
Wire feeds erratically.		See Troubleshooting Section of gun Owner’s Manual.
Wire feed speed does not switch from		Check reed relay, and replace if necessary.
run-in speed to weld wire feed speed.
Wire feeds, but burns back.		Readjust ramp-up speed potentiometer R70 on motor control board PC1 (see Section 2-3).
No gas flow.		Check gas hose and connections, and replace if necessary (see Section 2-2).
Wire does not feed, and is not ener-		Connect voltage sensing lead to workpiece (see Section 2-3).
gized.

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