Weiro ARC - 400SI, Operation Manual

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16
Repair and Maintenance
WARNING: Have a qualified electrician do the maintenance and trouble shooting work. Turn the input
power off, using the disconnect switch at the fuse box before working inside the machine.
1. Cautions:

Rivet equipment name tag on the specified area of the case, otherwise the inside parts will possibly
be damaged.
5. Connect welding cable to terminals firmly, otherwise the terminals will be burn out which will
cause the instability of welding process.
6. Avoid welding cable and control cable being broken, and prevent welding machine from being short
circuit.
7. Never let welding machine be bumped into or stacked up by heavy objects.
8. Ensure good ventilation
9. Under high temperature, if work with large current for long period, welder may shut down
automatically due to thermal protection acts .At this point, let the machine runs under open-load for
a few minutes, and it will be automatically recover.
10.Under high temperature, if work with large current for long period, welder may shut down
automatically due to air switcher trips. Cut off the power supply to the electricity switchboard on
frame, and wait for 5 minutes to turn on the air switcher on the power source fist then connect the
power supply to the electricity switchboard on frame. And leave the machine runs under open-load
condition for a while.
11.After welding, cut off the Argon gas supply and the power supply.
2. General maintenance

Remove dust from power resource with pressure air by qualified individuals every 3-6 months.
Check if the jointers are loose.

Check regularly if cables are worn out, knobs are loose, and components of panel are damaged.

Check regularly if cables are tightly connected to cable connecting terminals in case of terminals
being burnt out.

Clean and replace Contact Tip and Tungsten Electrode in time.
3. Procedure for regular checking prior to maintenance

Check if all front panel switches are on the proper positions.

Check if the input volt has the phase missing, and range are between 360~440V.

Check if the input cable is connected correctly and firmly with the power source.

Check if the ground lead is connected correctly and firmly.

Check if the welding cables are connected correctly and firmly.

Check if gas regulator is in good situation and gas flows out normally.
WARNING: Have a qualified electrician do the maintenance and trouble shooting work. Turn the input