SECTION 8 − SAFETY PRECAUTIONS FOR SERVICING
Protect yourself and others from injury — read and follow these precautions.
8-1. Symbol Usage
DANGER! − Indicates a hazardous situation which, if not avoided, will result in death or serious injury. The possible hazards are shown in the adjoining symbols or explained in the text.
Indicates a hazardous situation which, if not avoided, could result in death or serious injury. The possible hazards are shown in the adjoining symbols or ex- plained in the text.
NOTICE − Indicates statements not related to personal injury.
.Indicates special instructions.
This group of symbols means Warning! Watch Out! ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards. Consult sym- bols and related instructions below for necessary actions to avoid the hazards.
8-2. Servicing Hazards
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 test, maintain, and repair this unit.
During servicing, keep everybody, especially children, away. |
ELECTRIC SHOCK can kill.
DDo not touch live electrical parts.
DTurn Off welding power source and wire feeder
and disconnect and lockout input power using line disconnect switch, circuit breakers, or by removing plug from re- ceptacle, or stop engine before servicing unless the procedure spe- cifically requires an energized unit.
DInsulate yourself from ground by standing or working on dry insulat- ing mats big enough to prevent contact with the ground.
DDo not leave live unit unattended.
DIf this procedure requires an energized unit, have only personnel familiar with and following standard safety practices do the job.
DWhen testing a live unit, use the
DDisconnect input power conductors from deenergized supply line BEFORE moving a welding power source.
SIGNIFICANT DC VOLTAGE exists after removal of input power on inverters.
DTurn Off inverter, disconnect input power, and discharge input capacitors according to instructions in Troubleshooting Section be- fore touching any parts.
STATIC (ESD) can damage PC boards.
DPut on grounded wrist strap BEFORE handling
boards or parts.
D Use proper
FIRE OR EXPLOSION hazard.
DDo not place unit on, over, or near combustible surfaces.
DDo not service unit near flammables.
FLYING METAL or DIRT can injure eyes.
DWear safety glasses with side shields or face shield during servicing.
DBe careful not to short metal tools, parts, or wires together during testing and servicing.
HOT PARTS can cause severe burns.
DDo not touch hot parts bare handed.
DAllow cooling period before working on equipment.
DTo handle hot parts, use proper tools and/or wear heavy, insulated welding gloves and clothing to prevent burns.
EXPLODING PARTS can cause injury.
DFailed parts can explode or cause other parts to explode when power is applied to inverters.
DAlways wear a face shield and long sleeves when servicing inverters.
SHOCK HAZARD from testing.
DTurn Off welding power source and wire feeder or stop engine before making or changing me- ter lead connections.
DUse at least one meter lead that has a self- retaining spring clip such as an alligator clip.
DRead instructions for test equipment.