Maintenance And Inspection - YASKAWA MOTOWELD-T300D Instructions Manual

11 Maintenance and Inspection

• Before maintenance or inspection, or wiring, be sure to turn OFF the switch in the primary side
switch gear and put up a warning sign. (ex. DO NOT TURN THE POWER ON.)
Failure to observe this warnig may result in electric shock or injury.
• For internal inspection immediately after using the welder, the capacitor in the power supply may
be charged. Wait for approx. five minutes and remove the cover for inspection.
Failure to observe this warnig may result in electric shock or injury.
• Maintenance and inspection must be performed by specified personnel.
Failure to observe this caution may result in electric shock or injury.
Perform periodical maintenance and inspection for safe and efficient operatoins of the
welder.
Remove connectors MX2, MX3, and MX11 from the printed board (MX), connector MD1 from the
IMPORTANT
printed board (MD5), and output plus terminal R40 (2W10k) before performing the withstand voltage
test. If they are not removed and voltage is applied, the parts are destroyed. After completion of
the test, reconnect them properly. These printed boards (MX) and (MD5) are mounted on the
compartment barrier. R40 can be removed by using a FASTIN-FASTON terminal (trademark of
AMP Inc.).
■ Daily Inspection Items
Check the following:
• The switches operate without fail.
• The cooling fan rotates smoothly by turning ON/OFF the power supply switch and
exhausts the air from the rear face.
• There is no abnormal vibration, beat, or odor.
There is no leakage of cooling water or gas.
• The cable connecting section is not excessively heated.
• The welding cable and its connecting section is not excessively heated.
• There is no part where the connection cable is damaged, resulting in imperfect
insulation.
Note: Insulation resistance between the torch electrode and the base
metal must exceed 20 MΩ.
• Each connecting section is tightened securely.
• Water flows when the water cooled torch is used.
WARNING
CAUTION
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