BossWeld MST195, Руководство пользователя

Страница: 39 / 44

39
Issue
Power indicator is not lit,
fan does not work and no
output current
Power indicator is lit, fan
works, no output current
Over temperature indicator
is on, no output current
Output current is not stable.
Hot Welding Clamp
Excessive Spatter
Porosity - small cavities or
holes resulting from gas
pockets in weld metal
Possible Reason
• Welder is not plugged into
power supply
• Circuit breaker may have
operated
• Main power switch may not be
in the ON position
• Output connectors may be
disconnected or damaged
• Welding cables or earth clamp
not connected properly
• Duty cycle of the unit has
been exceeded. .
• Earth clamp connection loose
• Mains Voltage is not constant
• Loose welding cables
• Leads reversed
Welding clamp rated current is
too small,
• Wire feed speed set too high
• Voltage too high
• Wrong polarity set
• Stick out too long
• Contaminated base metal
Contaminated MIG wire
• Inadequate gas flow or too
much gas flow
• Worn contact tip
• Wrong gas
• Inadequate gas flow or too
much gas flow
• Moisture on the base metal
• Contaminated base metal
• Contaminated MIG wire
• Loose gas connection
Suggested Remedy
• Check that the welder is plugged into the
240V mains outlet and is switched on.
• Check that the mains fuse or breaker has not
operated.
• Check that the main switch on the rear of the
unit is in the on position.
• Check output connectors are connected
properly and are not damaged
• Check connections and that workpiece is free
of paint and rust at connection point
• Allow the unit to cool for 20 minutes
• Check earth clamp is connected to work piece
properly.
• Change the Main Supply to an alternative
• Check the welding connectors are tight in the
sockets.
• Check Leads are not reversed and c/_
Replace with larger size welding clamp.
• Select lower wire feed speed
• Select a lower voltage setting
• Select the correct polarity for the wire being
used
• Bring the torch closer to the work
• Remove materials like paint, grease, oil, and
dirt, including mill scale from base metal
• Use clean dry rust free wire. Do not lubricate
the wire with oil, grease etc
• Check the gas is connected, check hoses, gas
valve and torch are not restricted. Set the gas
flow between 6-12 l/min flow rate. Check hoses
and fittings for holes, leaks. Protect the welding
zone from wind and drafts
• Change contact tip.
• Check that the correct gas is being used
• Check the gas is connected; check hoses,
gas valve and torch are not restricted. Set the
gas flow between 10 - 15 l/min flow rate. Check
hoses and fittings for holes, leaks etc. Protect
the welding zone from wind and drafts
• Remove all moisture from base metal before
welding
•Remove materials like paint, grease, oil, and
dirt, including mill scale from base metal
• Use clean dry rust free wire. Do not lubricate
the wire with oil, grease etc.
Check and tighten connection.
TROUBLE SHOOTING