8-3
Maintenance and Inspection
Chapter 8
8.2 Daily Inspection
This section explains the daily inspection of the welding power source. Perform daily inspection for the
following items in the table.
Front and rear panel of the welding power source is made from polycarbonate resin. To prevent from
electric shock or fire caused by the damage on polycarbonate resin, ensure to follow the instructions
below.
• Before performing daily inspection, refer to " 8.1
Precautions for Maintenance and
• If there is dirt on plastic parts, soak a soft cloth in water, alcohol or neutral detergent,
wring it well and wipe off the dirt.
Do not use organic detergent or chemical agent. Doing so may cause crack (breaking)
and degrade the strength.
• If there is any abnormality in the plastic parts such as front and rear panels,
immediately stop the use and contact your dealer.
Daily inspection item
Content
Status of the grounding cable
• Check that the grounding terminal on the back of the welding power source is
securely grounded. (If it is not grounded, electric shock/failure/malfunction may
occur.)
Status of cables
(Primary power cable for facility side,
cables for base metal side/torch side,
torch cable, voltage detection cable,
etc.)
• Check that there is no abnormal heat generation in cable connections.
• Check that cable connections are not loose.
• Check that there is no problem in the insulation method between the cables and
base metal.
• Check that cables are not cut or damaged.
Appearance of the welding power
source
• Check that there is no abnormality such as crack in plastic parts of the welding
power source.
Noise/vibration/odor generated from
the welding power source
• Check that there is no sound of metal, abnormal vibration or burnt odor inside
the welding power source.
Status of the cooling fan
• Check that the cooling fan smoothly rotates when the power switch is turned on.
(There should not be sound of metal, abnormal vibration or burnt odor.)
While the cooling fan is rotating, air is ventilated from the slits on the front and
rear of the welding power source.
Status of the operation panel/torch
switch
• Check that the keys on the operation panel and the torch switch work normally.
Status of the primary power voltage for
facility side
• Check that there is not large fluctuation in the primary power voltage.
