USER MANUAL - 15 - YF-68E/A0NOTES BEFORE CHECKINGWARNING!Blind experiment and careless repair may lead to more problems and make formal check andrepair more difficult. When the machine is electrified, the bared parts contain life-threateningvoltage. Any direct and indirect touch will cause electric shock, and severe electric shock will leadto death.WARNING!Connected welding machine to dynamotor directly will damage machine. The heavy voltagepulse which is produced by dynamotor will burn out machine when machine connectedto dynamotor, only can use asynchronous dynamotor whose frequency and voltage both aresteady. Because of connecting welding machine to dynamotor directly lead to damageand malfunction, which is not in guarantee.NOTICE: In the period of guarantee maintenance, if user makes wrong check and repair for malfunctionof welding/cutting machines without our permission, the free maintenance guarantee offered will be invalid