Schumacher 00-99-000985/1009 - Manuel (Page 13)

• 10 •
On-OFF – THerMal InDIcaTOr
To turn the power on to the welder, push the main switch to On. Your
welder has a lighted main switch. This light will come on if the welder has
overheated. The light indicates that a thermostat has shut off the power
within the welder. Once the welder has cooled, the thermostat will turn the
welder back on and the light will go out. Over heating is usually caused by
exceeding the welder duty cycle.
DuTY cYcle
The duty cycle rating of a welder is a measure of how long the welder
can weld and how long it must be rested and cool. It is expressed as
a percentage of ten minutes (the industry recognized cycle time) and
represents the maximum welding time allowed, with the balance of the ten
minute cycle required for cooling.
InTernal THerMal PrOTecTIOn
If you exceed the duty cycle of your welder, an internal thermal protector
will open and shut off all welder functions. If this ever happens to you,
do not shut off the welder! leave it turned on. after cooling a while, the
thermal protector will automatically reset and the welder will function
again. However, you should wait at least 10 minutes after the thermal
protector opens before resuming welding, even if the protector resets
itself sooner, or you may experience less than specified duty cycle
performance.
CAUTION! DO NOT CONSTANTLY EXCEED THE DUTY CYCLE OR
DAMAGE TO THIS WELDER WILL RESULT!
cOnnecT WelDer GrOunD
attach the ground clamp to the work piece making sure that the work
piece is cleaned of dirt, oil, rust, scale, oxidation, and paint at the point
of connection. It is best to connect the ground clamp directly to the work
piece and as close to the weld as possible. If it is impractical to connect
the ground clamp directly to the work piece, connect it to metal that is
securely attached to the work piece, but not electrically insulated from it.
also, make sure this other metal is of similar or greater thickness than that
of the work piece.
CAUTION!
RISK OF ELECTRONIC COMPONENT DAMAGE!
If the ground clamp is being connected to an automobile or other
equipment with on-board computer systems, solid state electronic
controls, solid state sound systems, etc., do not weld until disconnecting
the cable from the battery that is attached to chassis ground. Failure to do
so may result in electronic component damage!