Panasonic Inverter controlled GMAW DC Power Source YD-400VP1YHD

(1) Unscrew two eyebolts and two bolts from the top panel to remove the top panel.

• Before removing the top panel, remove dust and iron particles from the top panel if any.

• Remove the top panel only for internal inspection. Do not remove side plates to prevent dirt and dust to get into the power source.

• Compared to the lower part, the upper part of the power source is designed as less likely dirt and dust to get into it. Do not perform inspection work in dust laden atmosphere, such as immediately after blowing off dust.

• After inspection work, make sure to put cover back in place.;

• Daily inspection is very important to make the most of performance of the product and to ensure safety of daily operation.

• Check the items shown in the following table as daily check and clean/replace parts if needed.

• As replacement parts, make sure to use our genuine parts for Panasonic welding machines to keep its performance and functions.;

Precautions in performing withstand voltage test and insulation resistance measurement

This product uses semiconductor components, such as transistor. Executing withstand voltage test or insulation resistance measurement casually may cause serious physical injury or mechanical failure. If necessary, contact Panasonic representatives.

● Attention to Panasonic representatives (About withstand voltage test and insulation resistance measurement) Prior to conducting withstand voltage test and insulation resistance test, prepare the following items and also connect ground wire (cross section: about 1.25 mm2).

Draw out the input power cable from the power box, and short the connecting terminals of the cable.

Output terminal of welding power source

Disconnect the cables connected to the output terminal except one for welding main circuit, and then short circuit the output terminals with conductor cable.

Disconnect all connecting cables and signal wires for external devices from jig terminal, welding torch, wire feeder connector, communication connector and so on.

Mainly check the following points.

• Signs of odor, tarnish and heat generation

• Items that are difficult to check in daily inspection;

• Check equipment, such as fuse holder, for wear or damage.

• Check installation of equipment for looseness.

• Check LEDs if they function (turns on/off) correctly.

• Check if cooling fan rotates smoothly.

• Check that input ground connections are secured at power source.

• Check that ground connections are secured at base metal.