LCD displays

at startup.

Fuse blown out.

Failure in input power.

1.Replace with fuses of same

specifications.

2.Check power lines.

LCD displays

but no resp-

onse in

welding.

10A fuse blown out.

Replace with fuses of same

specifications.

Power

indicator

lights up

but no

welding

spark.

Air pressure too low.

Increase air pressure.

Parameters for welding current set

too low.

Increase welding current.

Excessive gap between lower surface

of welding electrode and batteries.

Adjust the gap between batteries

and the surface of welding electrode

to about 3-4mm.

Wires connecting welding switch

broken.

Connect wires in compliance with

Fig.2 and Fig.4.

Optoelectronic switch damaged.

Replace optoelectronic switch.

If working indicator does not light

up or flicker, it may be caused by

power interference.

Switch power off and switch it on again.

In welding,

it is easy

to ignite

and even

burn battery

casing

Pressure for welding

electrode too low.

Increase welding pressure.

Foreign matter on the lower side of

welding electrode.

File the surface of welding

electrode even

and smooth with a small file.

Incorrect welding material.

Use proper welding material.