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STEALTH DIGI-TIG 320 AC/DC PULSE
28
DATE
MAINTENANCE CHECKS
Monthly
Use dry compressed air to clear the inside of arc welding machine. Pay
examination particular attention to clear any dust on radiator, main voltage transformer,
inductance, IGBT module, the fast recover diode and PCB, etc.
Check the arc welding machine bolt. If loose, tighten. Replace if worn. Scrape
off any rust to ensure it works efficiently.
Quarterly
Check the actual current accords with the displaying value. If not, they should
examination be reconfigured. The actual current value can be measured by the adjusted
plier-type ampere meter.
Annual
Measure the insulating impedance among the main circuit, PCB and case.
examination If it is below 1M
Ω
, insulation may be damaged and should be repaired or
replaced.
5.2 Troubleshooting
• Before arc welding machines are despatched from the factory, they have already been
carefully checked. Do not allow anyone unauthorised to make any alterations to the
equipment.
• Maintenance work must be carefully undertaken. If any wire becomes loose or
misplaced, it may be a potential danger to the user.
• Only authorised professional maintenance personnel should overhaul the machine.
• Ensure the power switch is shut off before you switch on the mains supply to the
machine.
• If a problem persists and no authorised professional maintenance personnel is
available, contact your supplier.
If there are minor problems with the DIGI-TIG 200 AC/DC PFC MV welding machine,
consult the following chart:
S/N
PROBLEM REASON
SOLUTION
Power light is damaged or
Turn on the power source,
poor connection
Check and repair Pr7
1
fan works but power pilot
lamp is not on
Power transformer damaged
Repair or change transformer
Control PCB fails
Repair or replace control Pr4
Fan is blocked
Clear blockage
Turn on the power source,
2
power lamp is on but fan
Fan start capacitor damaged
Change capacitor
does not work
Fan motor damaged
Change fan