Harbor Freight Tools 55167 Power switch 7a does not light when switched on, Troubleshooting

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Troubleshooting (continued)

Important!

Be CERTAIN to shut off the Welder, disconnect it from power, and discharge the torch to ground before adjusting, cleaning, or repairing the unit.

Power switch (7a) does not light when switched on

Possible Causes and Solutions

1.Unit is not connected to outlet properly or outlet is unpowered: Verify the voltage at the outlet and the connection to the outlet.

If voltage is not present at outlet, check circuit breaker/GFCI devices; if any are tripped, determine and remedy cause before resetting. Verify that the circuit is designed to supply the required input amperage as detailed on the Specifications table.

Power switch (7a) lights,

but welder does not function when switched on

Possible Causes and Solutions

1.Tripped thermal protection device:

Shut the welder’s switch to off and allow it to cool for at least 20 minutes.

Reduce duration or frequency of welding periods to help reduce wear on the welder. Refer to Duty Cycle section on page 15.

2.Faulty or improperly connected Trigger Switch (1c):

Check and secure/replace Trigger Switch (1c), according to the instructions outlined on page 14 of this manual.

3.Internal fuse blown:

Check/replace according to the following directions.

a.WARNING! Turn the welder OFF and unplug it before proceeding.

b.Press on the Cover Locking Spring (8), then lift the Cover (31) using Handle (30). Remove Left Side Panel (13).

c.Examine fuse on panel to see if metal wire inside is

broken or not. See illustration to the right.

Fuse

NOTE: The circuit board is very delicate and will be damaged if it is not supported while the fuse is being removed/replaced. If you are have any doubts about doing this without damaging the welder, have a qualified technician replace the fuse.

d.If the fuse is broken, carefully support the circuit board with a gloved hand while you remove the old fuse. Support the circuit board from behind while you install a new 2 Amp, 250 Volt fuse of the same type.

Never use another type or size fuse in this unit.

e.Reinstall the Left Side Panel (13), close the Cover (31), and test the unit for proper function before use.

If the steps above do not solve the problem or if the repairs involved are too

complex, contact a qualified technician.

SKU 55167

For technical questions, please call 1-800-444-3353.

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Contents Welder For technical questions and replacement parts, please callContents Work Area SpecificationsGeneral Safety Rules Save This ManualElectrical Safety Personal SafetyTool Use and Care Specific Safety Rules ServicePage Welding Produces toxic fumes and gasses Inhalation HazardPlug and Outlet Grounded Tools Tools With Three Prong PlugsSee Figure C Double Insulated Tools Tools With Two Prong PlugsProng Plug and Outlet Outlets for 2-Prong Plug See Figure C, nextFigure C Unpacking AssemblyInstalling the Wire Reel Wire Feed Roller Bracket Screws 45 Washers Trigger Switch Replacement Before You Start Welding OperationDo not Switch the Current While Welding Holding The Torch HartC EttingsS eldW Material Thickness Steel Weld Diagnosis Weld Penetration Weld Not Adhering ProperlyBend at joint Porosity Crooked/wavy bead Excessive SpatterInaccurate welding Maintenance Wiring Schematic Parts Lists and DiagramsPlease Read the Following Carefully Assembly Diagram Page Welding arc not stable TroubleshootingWire feed motor runs butwire does not feed properly Wire creates a bird’s nest During operationInternal fuse blown Power switch 7a does not light when switched onTroubleshooting Faulty or improperly connected Trigger Switch 1cWeak Arc strength Wire Feeds, but arc does not ignite