Everlast PowerMTS 251Si Operator's Manual page 13

Section 1
of the welder. Welding parameters can be infinitely and
continuously adjusted throughout the range, offering
instant welding response for maximum control.
Installation. The basic construction of the PowerMTS
251Si is rugged and durable. It is considered ideal for
circumstances where portability is of concern. Critical
components are protected by coatings to make the
welder environmentally resistant and has a water in-
gress rating of IP21S, (the standard in the welding indus-
try to protect from vertically dripping water). However,
some common-sense care should be exercised to make
sure that the welder offers the safest and best perfor-
mance. Please note the following items regarding safe
and proper operations to ensure best service and re-
sults while welding:
1) Do not use the welder in damp or wet areas. Per-
spiration and other forms of water in contact with
the body can increase the risk of electrocution.
2) Do not use the welder in extremely corrosive envi-
ronments. To maintain optimum power transfer,
check main connections, clamps and cables fre-
quently to ensure that components are not corrod-
ed. Excessive dirt, corrosion and oxidation can re-
sult in an unstable arc and excessive heat build-up.
If the work clamp becomes corroded or damaged,
be sure to replace it with a heavy-duty work clamp
rated for at least 300 amps. If your work clamp
appears to become extremely hot while welding,
and all connections are clean and secure, replace
the work clamp.
3) Store the welder covered with a moisture and fire
resistant material.
4) If used on a mobile cart, strap or fix the welder to
the cart so that accidental overturn is not likely.
Duty Cycle/Overcurrent/Under Voltage/Overvoltage
Warnings. Thanks to a dual cooling fan design, the
PowerMTS 251Si has a duty cycle rating of 40% at 250
Amps while welding in MIG and TIG mode and a rating
of 40% @ 200 Amps while welding in stick mode. The
duty cycle rating is the amount of time (expressed as a
percentage) out of 10 minutes the unit can weld with-
out a rest. For MIG, the unit is capable of welding 4
minutes out of every 10 minutes at the maximum out-
put of 250 Amps. For the balance of the 10 minute peri-
od, the unit should be allowed to rest and cool while
running. This rating is based off a 40° C maximum tem-
perature. If the unit's duty cycle has been exceeded, the
Stop LED will come on and unit will cease welding out-
put. An error code of "E04"will be displayed If a duty
Introduction and Specifications
cycle event has occurred. Allow the unit to run and cool
for 15 minutes. After 15 minutes of cooling the unit
while switched on without welding, cycle the power
switch to reset the unit. In the event of an overcurrent,
the welding output will cease and the "Stop" LED will
come on and an error code of EO2 will be displayed. In
duty cycle and overcurrent events, the wire may contin-
ue to feed without output. Overcurrent events can be
caused by too low of supply voltage, running on under-
sized extension cords, too large of wire diameter, too
high of settings for wire diameter, too high of input
voltage, or internal or external electrical fault. When
an overcurrent has occurred, turn the machine off im-
mediately, then check and remedy the fault before
switching the welder back on. Under or over voltages
will also trigger the Stop LED. The error code of E01 will
be displayed. This is likely a result of a poor power sup-
ply, a long extension cable, or from running off of a
generator that is malfunctioning.
Note: If a generator is going to be used with this unit,
please make sure that it is certified by it's manufactur-
er to be "clean power," which is normally stated as
less than 5% THD ( Total Harmonic Distortion). For
proper operation with a generator, make sure you
have at least a minimum 9,000 watts of surge capabil-
ity and 6500 watts of continuous rated output capabil-
ity.
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