Miller Electric TM-353E manual Safety Precautions for Servicing, Symbol Usage, Servicing Hazards

SECTION 1 – SAFETY PRECAUTIONS FOR SERVICING

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1-1. Symbol Usage

Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols.

YMarks a special safety message.

.Means NOTE; not safety related.

This group of symbols means Warning! Watch Out! possible ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards. Consult symbols and related instructions below for necessary actions to avoid the hazards.

1-2. Servicing Hazards

WARNING

The symbols shown below are used throughout this manual to call attention to and identify possible hazards. When you see the symbol, watch out, and follow the related instructions to avoid the hazard.

Only qualified persons should service, test, maintain, and repair this unit.

During servicing, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

1.Do not touch live electrical parts.

2.Stop engine or turn OFF welding power source and wire feeder, and disconnect and lockout input power using line disconnect switch, circuit breakers, or by removing plug from receptacle before servicing unless the procedure specifically requires an energized unit.

3.Insulate yourself from ground by standing or

working on dry insulating mats big enough to prevent contact with the ground.

4.Do not leave live unit unattended.

5.When testing a live unit, use the one-hand method. Do not put both hands inside unit. Keep one hand free.

6.Disconnect input power conductors from

deenergized supply line BEFORE moving a welding power source.

SIGNIFICANT DC VOLTAGE exists after removal of input power on inverters.

7.Turn Off inverter, disconnect input power, and discharge input capacitors according to instructions in Maintenance Section before touching any parts.

STATIC ELECTRICITY can damage parts on circuit boards.

1.Put on grounded wrist strap BEFORE handling boards or parts.

2.Use proper static-proof bags to store, move, or ship PC boards.

FIRE OR EXPLOSION can result from placing unit on, over, or near combustible surfaces.

1. Do not place unit on, over, or near combustible surfaces.

2. Do not service unit near flammables.

FLYING PIECES OF METAL or DIRT can injure eyes.

1.Wear safety glasses with side shields or face shield during servicing.

2.Be careful not to short metal tools, parts, or wires together during testing and servicing.

HOT PARTS can cause severe burns.

1.Do not touch hot parts bare handed.

2.Allow cooling period before servicing welding gun or torch.

EXPLODING PARTS can cause injury.

1.Failed parts can explode or cause other parts to explode when power is applied to inverters.

2.Always wear a face shield and long sleeves when servicing inverters.

ELECTRIC SHOCK HAZARD from incorrect use of test equipment.

1.Turn Off welding power source and wire feeder or stop engine before making or changing meter lead connections.

2.At least one meter lead should be a self-retaining spring clip such as an alligator clamp.

3.Read instructions for test equipment.

HIGH-FREQUENCY RADIATION can interfere with radio navigation, safety

services, computers, and communications equipment.

1.Have only qualified persons familiar with electronic equipment perform this installation.

2.The user is responsible for having a qualified electrician promptly correct any interference problem resulting from the installation.

3.If notified by the FCC about interference, stop using the equipment at once.

4.Have the installation regularly checked and maintained.

5.Keep high-frequency source doors and panels tightly shut, keep spark gaps at correct setting, and use grounding and shielding to minimize the possibility of interference.

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