20 – Mastertig MLs™ 2300 aCDC / 0743 © keMppi oy
3.5. ERROR CODES
The machine always checks its operation automatically during start-up and reports any failures
detected. If failures are detected during start-up, they are shown as error codes on the control panel
display.
Err3: Overvoltage or undervoltage
The machine has stopped the welding because it has detected momentary voltage spikes or
continuous mains over- or under-voltage dangerous to the machine. Check the quality of the
supply network.
Err4: Power source overheating
The power source has overheated. The cause may be one of the following:
• The power source has been used for a long time at maximum power.
• The circulation of cooling air to the power source is blocked.
• The cooling system has experienced a failure.
Remove any obstacle to air circulation, and wait until the power source fan has cooled down the
machine.
4. MAINTENANCE
Watch out for mains voltage when handling electric cables!
Degree and circumstances of machine utilisation should be taken into consideration when planning
product maintenance. Careful use and preventive maintenance help to avoid unnecessary production
disturbances and breaks. Check the condition of the welding and connection cables daily. Do not
use damaged cables.
4.1. REGULAR MAINTENANCE
4.1.1. Every sixth months
NOTE! Disconnect the plug of the machine from the mains socket and wait for ca. 2 minutes
(capacitor charge) before removing the casing plate.
The following maintenance operations should be carried out at least every sixth months:
• Electric connections of the machine - clean any oxidised parts and tighten any loose
ones. NOTE! You must know the correct tension torques before you start repairing the
connections.
• Clean the inner parts of the machine from dust and dirt e.g. with a soft brush and a vacuum
cleaner. Do not use compressed air because there is the danger that the dirt is packed even
more tightly in the gaps of the cooling proles. Do not use a pressure washer.
Only an authorised electrician may repair the machine.
4.1.2. Service contract
KEMPPI service workshops make special service contracts with customers about regular
maintenance. All parts are cleaned, checked and if necessary, repaired. Also the operation of
welding machine is tested.
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