No. P30051
―68―
12. MAINTENANCE AND TROUBLESHOOTING (continued)
12.1 Carrying out Maintenance on the Welding Power Source
(1) Periodical checking
(2) Periodically check the welding power source to ensure the safety of the equipment and
the efficiency of work.
•
Daily checking the followings:
-
No strange vibration, buzzing noise, and smell are generated from the welding power
source.
-
No excessive heat is generated from the cable connections.
-
Fan functions properly when the power switch is turned on.
-
The switches properly function.
-
Connection and insulation of cables are surely made.
-
There are no break in cables.
-
Fluctuation of power source voltage is not large.
-
Case Earth is surely connected. (Disconnection of the Case Earth may result in failure
or malfunction of the equipment.)
-
There is no trouble in crack and the like on front panel.
•
Checking the followings each three to six months:
-
There is no damage inside the torch.
-
There are no loose connections or no poor contacts caused from rust, on input side of
the welding power source and output side of the cables.
-
There is no trouble with insulation.
-
The welding power source is properly grounded.
-
Built-up dust on the transistor or the cold plate on the rectifier may affect the equipments.
Take off the cover of the welding power source once a half year, then remove dust by
blowing moisture-free compressed air on each part.
-
The dust protective filter located on the inlet of the fan does not clog, which may result in
damage to the welding power source. Be sure to inspect it periodically.
12.2 Precaution for Replacement of the Printed Circuit Board
•
Make sure that the connector number
inscribed on the printed circuit board
matches the number marked on the
connector.
•
Turn off the control power switch and line
disconnect switch before carrying out
maintenance on the welding power source,
and wait three minutes until the capacitors
inside the welding power source discharge.
•
This welding power source uses a high-
frequency inverter system, be careful of
accidental connection of the line disconnect
switch at input side.
•
Surely connect the connectors until the connector clicks. Failure to do so may result in
damage to the printed circuit board and the welding .
•
With the connectors disconnected, do not turn on the power switch on the front panel.
•
Do not use organic solvent such as thinner, trichloroethylene, gasoline, etc., to clean the
plastic cover and carrying handle of the welding machine. Deformation and flaw may
result from the adherence of the organic solvent.
NOTE: Match the number on the printed
circuit board with that on the connector.
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