ESAB ESP-101 Instruction Manual download pdf (Page 44)

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8 MAINTENANCE

BE SURE THAT THE WALL DISCONNECT SWITCH OR WALL

CIRCUIT BREAKER IS OPEN BEFORE ATTEMPTING ANY

INSPECTION OR WORK INSIDE OF THE UNIT.

8.1 General

If this equipment does not operate properly, stop work immediately and investigate

the cause of the malfunction. Maintenance work must be performed by an

experienced person, and electrical work by a trained electrician. Do not permit

untrained persons to inspect, clean, or repair this equipment. Use only

recommended replacement parts.

8.2 Inspection and cleaning

Frequent inspection and cleaning of the ESP-101 cutting machine is recommended.

Some suggestions for inspecting and cleaning are as follows:

1. Check work cable to work piece connection.

2. Check safety earth ground at workpiece and at power source chassis.

3. Check heat shield on torch. It should be replaced if damaged.

4. Check the torch electrode and cutting tip for wear on a daily basis.

Removespatter, replace if necessary.

5. Make sure cable and hoses are not damaged or kinked.

6. Make sure all plugs, fittings, and ground connection are tight.

7. With all input power disconnected, and wearing proper eye and face protection,

blow out the inside of the cutting power supply using low-pressure

drycompressed air.

WATER OR OIL ACCASIONALLY ACCUMULATES IN COMPRESSED

AIR LINES. BE SURE TO DIRECT THE FIRST BLAST OF AIR AWAY

FROM THE EQUIPMENT TO AVOID DAMAGE TO THE UNIT.

8. Occasionally bleed water from the filter beneath the air regulators.

8.3 IGBT handling & replacement

Since IGBT gates are insulated from any other conducting region, care should be

taken to prevent static build up, which could possibly damage gate oxides. All IGBT

modules are shipped from the factory with conductive foam contacting the gate and

emitter sense pins.

Always ground parts touching gate pins during installation. In general, standard ESD

precautions application to FETs should be followed.

Other handling precautions that should also be observed are as follows:

S Use grounded work station with grounded floors and grounded wrist straps when

handling devices.

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ESAB ESP-101 Instruction Manual Page 44