No strange vibration, buzzing noise, and smell are generated from the welding power source.
(2) No excessive heat is generated from the cable connections.
(3) Fan functions properly when the power switch is turned on.
(4) The switches properly function.
(5) Connection and insulation of cables are securely made.
(6) Cables are not broken or damaged.
(7) Fluctuation of power source voltage is not large.
(8) Case Earth is surely connected. (Disconnection of the Case Earth may result in failure or
malfunction of the equipment.)
(9) There is no trouble in crack and the like on the front panel.