Maintenance And Checking - Panasonic YC-400TX Manual

10. Maintenance and Checking

Periodic maintenance and checking are recommended for safe use of the welder. The primary switch box (or
no-fuse breaker) must be turned off when checking internal or external terminals.
10.1 Daily check list
Take adequate countermeasures or contact dealer if any abnormality is found through the following
checks:
① Is there any unusual vibration, buzzing or smell?
② Does any cable connection show signs of unusual heat?
③ Does the cooling fan rotate smoothly when the power switch is turned on？
④ Is any switch malfunctioning?
⑤ Is the method of cable connection or insulation correct?
⑥ Is any section of cable damaged?
10.2 Checking by every 3-6 months
Electric connection
Check whether any fixing screw on the input and output side of cable connection is loose or providing
insufficient contact, and for any insulation problems.
Grounding conductor
Confirm whether or not the case of the machine is fully grounded.
Inside of the machine
If the heat ink is covered with dust, its heat radiation becomes inefficient, resulting in undesirable effects on
semi-conductors, transistors etc. Also, if dust accumulates between the windings of the transformer, it may
cause degradation of insulation. Clean every part of the machine by blowing compressed dry air removing the
top and side panels or the welder at least once every six months. If the top or side panel is removed, replace it
correctly before operating again. Care should be taken because transformers and semi-conductors are likely to
burn out due to inefficient cooling effect if the machine is operated without remounting these panels.
When checking the inside of the machine after use, wait approximately five minutes after turning off the switch
of the switch box and the power switch until discharge of capacitors in power supply of the machine is
completed.
10.3 Adjustment of high frequency
Do not touch the spark electrode at normal time.
(The electrode spacing of the spark electrode is adjusted to 1.2mm). Polish electrode if its surface shows
extreme unevenness or dirt, and adjust electrode spacing to 1.2± 0.1 mm. The spark electrode is located on
the PC board TSM9494□.
10.4 Care Points Concerning Insulation Pressure Test and Measurement of
Insulation Resistance
As numerous transistors and semi-conductor components are used in this machine, careless insulation
pressure tests and measuring of the machine.
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