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Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

TROUBLESHOOTING

DEFECT

CAUSES

SUGGESTIONS

Spark will not start

Bad clamp connection.

Inverter printed circuit is

defective.

Check clamp connection.

Contact your nearest

CLARKE dealer.

No output voltage Overheated machine (the

red LED should be on).

Wait for thermal cutout to

be reset.

Internal relay has failed.

Contact your nearest

CLARKE dealer.

Inverter printed circuit is

defective.

Contact your nearest

CLARKE dealer.

Wrong output

current

Current selector control is

defective.

Contact your nearest

CLARKE dealer.

Low power supply voltage.

Check the mains distribution

system.

Porosity of welds

Acid electrode on steel

with high sulphur content.

Electrode oscillates too

much.

Workpieces are too far

apart.

Workpiece being welded is

cold.

Use basic electrode.

Move edges to be welded

closer together. Move slowly

at the beginning.

Cracks in weld

Material being welded is

dirty (e.g.oil, paint, rust,

oxides).

Not enough current.

Clean workpiece before

welding is an essential

method of achieving neat

weld beads.

Limited

penetration

Low current, high welding

rate, reversed polarity.

Electrode inclined in

position opposite to it's

movement.

Ensure operating

parameters are regulated

and improve preparation of

work pieces.

Profile defects

Welding parameters are

incorrect.

Pass rate is not related to

operating parameter

requirements.

Electrode not inclined

constantly while welding.

Follow basic and general

welding principles.