Daihen Inverter OTC WEE BEE 400

Warning: This procedure requires trained personnel with PPE!

CAUTION: Do not turn on the power switch of welding power source when the connector of printed circuit board is disconnected.

Printed circuit board PCB7 present?

Is the number printed on the printed circuit board the same as the number indicated on the connector?

Is the connector inserted firmly to the end?

Choose the type of service done

Issues found during the replacement

Sign off on the inverter parts replacement

This section explains the periodical inspection of the welding power source. Check the items in the table below every three (3) to six (6) months.

1) Grounding wire and Each 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 deterioration, damage or other abnormality in consumable parts of the welding torch. Abnormality in consumable parts can prevent smooth wire introduction.

3) Cleaning inside the welding power source

• Blow with dry compressed air from the front slit (ventilation hole) to the back side to remove dust inside the welding power source.

Dust accumulating on the heat sink of transistor and rectifier may prevent heat radiation, adversely affecting the transistor. Also, accumulation of dusts between the winding of transducer could deteriorate insulation.

4) Cleaning inside the welding power source (When an abnormal temperature error code is displayed)

• Dust accumulating on the fin or winding of heat sink can cause insufficient heat radiation.

WARNING: The customer MUST NOT perform the withstand voltage test. If necessary, contact your dealer.

Insulation resistance measurement should be conducted by qualified persons or persons familiar with the welding machine.

CAUTION: Conducting insulation resistance measurement by customer may result in injury or equipment failure.

When measuring insulation resistance and testing withstand voltage, follow the steps below.

Disconnect the input power cable and grounding cable from the disconnect switch and short-circuit the input terminal.

Short-circuit the positive (+) and the negative ( - ) sides of the output terminal.

Unground all the case grounding cables (line No.80, total of 6 positions) and insulate them with insulation tape.

For DR1, short-circuit the AC side and positive (+) output side and the AC side and negative ( - ) output side respectively.

For DR2, short-circuit between the anode and the cathode.

Warning: This inspection requires trained personnel with PPE!

Ensure to follow the instructions below to prevent electric shock or fire caused by the damage on polycarbonate resin.

When cleaning the welding power source, do not expose the cooling fan directly to compressed air.

When using a vacuum cleaner to remove powder dust accumulating on the welding power source, do not vacuum between the rotating part of cooling fan and the main body.

If there is any abnormality in the plastic parts such as front and rear panels, immediately stop the use and contact your dealer.

Perform periodical maintenance and repair damaged parts if any before use.

Maintenance, inspection and repair should be performed by qualified persons or persons familiar with the Welding power source.

Before starting maintenance and inspection, make sure to cut the input power with the disconnect switch in the box connected with the welding power source and wait three minutes or more.

During maintenance and inspection, take an appropriate measure to prevent turning on the input power.