Maintenance And Troubleshooting; Periodic Maintenance; Nonperiodic Maintenance - Nielsen CT4973 Original Instruction

Inverter mig/mag, flux, mma
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4. MAINTENANCE AND TROUBLESHOOTING

Only qualified persons should install,use or service this equipment. Protect yourself and others
from possible serious injury or death.
WARNING: Do not operate with covers removed.Disconnect input power before servicing.
Do not touch electrically live parts.
WARNING:
Before removing any screw on the machine for maintenance, power supply must be
disconnected from the electric lines and enough time should be allowed for capacitor discharging. During
maintenance, pay attention to the moving parts in the machine such as ventilator, wire feeding motor, rolls
and, wire spool.

4.1 PERIODIC MAINTENANCE

Once every three months
●Clean the labels on the m a c h i n e . R e p a i r o r replace the worn out labels.
●Repair or replace the worn out welding cables.
●Clean and tighten weld terminals.
●Check Gun, earth clamp and their cables.
●Check the main connections inside the machine.
Once every six months
Open the covers of the machine and clean with dry air.
NOTE: The above recommended maintenance periods are indicative according to our
general experience, these may vary from work shop to work shop and the conditions of the
welding site.

4.2 NONPERIODIC MAINTENANCE

Wire feeding rolls and the surrounding parts should be kept clean and the surface of
the drive rolls should definitely not be lubricated. Each time the wire is replaced, the
dirt accumulated on the mechanism must be cleaned with dry air .
●Contact tip and nozzle on the gun have to be cleaned regularly and changed if required.
Contact tips must be in good condition, longer tips generally give better results.
MAINTENANCE AND TROUBLESHOOTING
-15-

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