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9. MAINTENANCE
The arc welding equipment should be routinely maintained according to the manufacturer’s recommendations.
Cover should be closed and properly fastened when the welding equipment is in operation. The arc welding equipment
should not be modified in any way, except for those changes and adjustments covered in the manufacturer’s instructions. In
particular, the spark gaps of arc striking and stabilising devices should be adjusted and maintained according to the
manufacturer’s recommendations.
Before carrying out any internal checking or repair work, check that the power source has been disconnected from
the electrical installation by locking and guard devices. Ensure and avoid accidental connection of the plug to a socket.
Voltages are high and dangerous inside the machine.
In spite of their robustness, the power sources require some regular maintenance. Each 6 months (more often in
dusty surroundings):
- The machine must be blown through with dry, oil free compressed air.
- Check for continuity all electrical connections.
- Check the connection of cables and flat top.
Check the good state, insulation and connection of all equipment and electrical accessories: plugs and flexible
supply cables, conduits, connectors, extension cables, sockets on the power source, ground clamp and electrode holder.
These connections and mobile accessories are marked according to standards, if consistent with the safety rules. They
should either be controlled by accredited firms.
-Repair or replace all defective accessories
-Check periodically that the electrical connections are tightened and do not heat.
Maintenance works of electrical equipment must be entrusted by qualified people.
DAMMAGE REPARATIONS
POSSIBLE CAUSES
CHECK
YELLOW AND RED INDICATORS ARE OFF = NO SUPPLY
ON/OFF main switch is OFF
Switch it ON
Power supply cable is cut
Check cable and connections
No main supply
Check circuit breaker and fuses
Defective ON/OFF main switch
Replace the switch
YELLOW AND RED INDICATORS ON = INPUT VOLTAGE OVER RATED
LIMIT
Input voltage > 265V
Check supply voltage
Power source connected to 2 phases
Connect the machine to proper voltage (230V)
YELLOW INDICATOR ON = WARMING UP
Duty cycle over rated (if ambient > 25°C)
Let the machine cool, it will automatically start again
Insufficient cooling air
Clean the air inlets
Very dusty machine
Open the generator and blow it through
Fan doesn’t start
Replace the fan
IMPROPER WELDING
Wrong electrode polarity
Use the right polarity according to the indications of
electrode’s manufacturer
Dirtiness in the weld parts
Clean and eventually degrease the weld parts
