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I N S T R U C T I O N M A N U A L • M O D E L H 5 2 0 / H 5 4 0
21
OVERLOAD PROTECTION
There are two overload protection circuits – one for the power supply and one
for the hand gun – which will terminate the welding cycle when the system is
operated under adverse conditions, such as excessive wattage, voltage or
current, or a loose or failed horn/tip. The welding cycle will also be
automatically terminated if the hand gun contacts a grounded surface while
the power is on – the power supply will overload because it detects an
alternate ground path. The overload protection circuits will prevent damage to
internal system components.
If an overload condition exists, turn the power supply off (using the ON/OFF
switch) and wait for approximately 5 seconds. Then turn the power supply
back on. If the overload condition continues to exist, contact our Service
Department at 1-800-745-1105.
When the hand gun is
on, be sure to isolate it
from any grounded
surface to avoid
triggering an overload
condition as the
system detects an
alternate ground path.
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