OM-229 158 Page 28
SECTION 8
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SAFETY PRECAUTIONS FOR SERVICING
Protect yourself and others from injury — read and follow these precautions.
8-1. Symbol Usage
OM-___ - Date, safety_ihtm 2010
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03
DANGER!
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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
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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 service, test, maintain, and re-
pair this unit.
During servicing, keep everybody, especially children, away.
ELECTRIC SHOCK can kill.
Do not touch live electrical parts.
Turn Off induction heating power source and
disconnect and lockout input power using line
disconnect switch, circuit breakers, or by removing plug from recep-
tacle, or stop engine before servicing unless the procedure specifi-
cally requires an energized unit.
Insulate yourself from ground by standing or working on dry insulat-
ing mats big enough to prevent contact with the ground.
Do not leave live unit unattended.
If this procedure requires an energized unit, have only personnel
familiar with and following standard safety practices do the job.
When testing a live unit, use the one-hand method. Do not put both
hands inside unit. Keep one hand free.
Disconnect input power conductors from deenergized supply line
BEFORE moving an induction heating power source.
SIGNIFICANT DC VOLTAGE exists in inverter
power sources AFTER removal of input power.
Turn 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.
Put on grounded wrist strap BEFORE handling
boards or parts.
Use proper static-proof bags and boxes to
store, move, or ship PC boards.
FIRE OR EXPLOSION hazard.
Do not place unit on, over, or near combustible
surfaces.
Do not service unit near flammables.
FLYING METAL or DIRT can injure eyes.
Wear safety glasses with side shields or face
shield during servicing.
Be careful not to short metal tools, parts, or
wires together during testing and servicing.
INDUCTION HEATING can burn.
Do not touch hot parts bare handed.
Allow cooling period before handling parts on
equipment.
Do not touch or handle induction head/coil during operation.
Keep metal jewelry and other metal personal items away from
head/coil during operation.
To handle hot parts, use proper tools and/or wear heavy, insu-
lated welding gloves and clothing to prevent burns.
EXPLODING PARTS can injure.
Failed parts can explode or cause other parts to
explode when power is applied to inverters.
Always wear a face shield and long sleeves
when servicing inverters.
SHOCK HAZARD from testing.
Turn Off induction heating power source be-
fore making or changing meter lead connec-
tions.
Use at least one meter lead that has a self-
retaining spring clip such as an alligator clip.
Read instructions for test equipment.
FALLING EQUIPMENT can injure.
Use lifting eye to lift unit only, NOT running
gear, gas cylinders, or any other accessories.
Use equipment of adequate capacity to lift and
support unit.
If using lift forks to move unit, be sure forks are long enough to
extend beyond opposite side of unit.
Follow the guidelines in the Applications Manual for the Revised
NIOSH Lifting Equation (Publication No. 94
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110) when manu-
ally lifting heavy parts or equipment.
