Kemppi MLS 2500 - Manual (Page 18)

1 – Master MLs™ 500, 503, 3500, 3503, Mastertig MLs™ 3000, 3003, 4000, 4003 / 0649 © keMppi oy
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 profiles. 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.
4.2. TROubLESHOOTINg
Power On light is not lit.
There is no power in the machine.
• Check mains fuses, replace blown fuses.
• Check mains cable and plug, replace defect parts.
The machine is not welding properly.
There are plenty of spatters during welding. Weld joint is porous or power supply is insufficient.
• Check welding settings and adjust if needed.
• Check gas flow and gas hose connection.
• Check that earth clamp is properly fastened and that earth cable has no defects. Change the
position if necessary and replace defect parts.
• Check welding torch cable and connector. Tighten the connection and replace defective
parts.
• Check the consumable parts of welding torch. Clean and replace defect parts.
• Check mains fuses, replace blown fuses.
Power source overheat indicator light is lit.
Power source is overheated.
• Check that there is enough free space behind the machine for cooling air circulation.
• Check cooling unit for water circulation, cleanliness of heat exchanger and air grate. Add
cooling liquid if necessary.
For further information and assistance, contact your nearest Kemppi service workshop.