Troubleshooting; Maintenance - Draper 63669 Manual

9.

TROUBLESHOOTING

9.1 TROUBLESHOOTING
WARNING: For your own safety, turn the switch off and remove the plug from the power supply socket.
PROBLEM
Wire not feeding despite
wire feed pulley turning.
Interrupted or disruptive
wire supply.
Electric arc turned off.
Welder suddenly stops
working after longer
operation.
IMPORTANT: Please note all repairs/service should be carried out by a qualified person.

10. MAINTENANCE

10.1 MAINTENANCE
Regular inspection and cleaning reduces the necessity
for maintenance operations and will keep your tool in
good working condition.
Warning: Remove the plug from the power supply.
Periodically the welder must be checked as detailed
below.
• Check the torch cable and ground cable connections.
• Clean the contact tip and the gas shroud with an iron
brush. Replace if worn.
• Clean the outside of the welder with a damp cloth.
• Every time the wire spool is replaced:
• Check the alignment, cleanliness and state of wear
of the wire roll.
• Remove any metal powder deposited on the wire
feeder mechanism and then dry with compressed air.
• Occasionally test to ensure the thermal cut-out
device is operating correctly, i.e. weld for an
extended period or on a maximum duty cycle.
• Check the condition of the warning labels.
• Replace any worn parts.
• If the replacement of the supply cord is necessary,
this has to be done by the manufacturer or his agent
to avoid a safety hazard.
POSSIBLE CAUSE
Dirty current nozzle (contact tip).
Wire feed pulley set too tight.
Too low clamping pressure of the
wire feed pulley.
Damaged current nozzle.
Burnt current nozzle.
Dirty driving gear torch liner.
Cut on worn driving gear.
Poor contact between earth
clamp and part to be welded.
Short circuit between current
nozzle and gas supply pipe.
Too loose current nozzle.
Welder has overheated due to
too long use and the thermal
protection has activated.
– 10 –
REQUIRED ACTION
Clean.
Loosen.
Increase the clamping pressure.
Replace.
Replace
Clean.
Replace.
Tighten the pliers and check them,
remove paint and rust.
Clean or replace the current and gas
nozzle, remove dirt, paint and rust.
Tighten the current nozzle firmly.
Let the welder cool down.
The welder must be correctly ventilated during tool
operation. Avoid blocking the air inlets and vacuum the
ventilation slots regularly.
Do not use solvents or fuels to clean the product. When
not in use, store the product in a safe, dry place.