Maintenance Schedule; Overload Protection; Overheating; Motor Fuse F1 - MAC TOOLS MW165 Owner's Manual

SECTION
4-
MAINTENANCE & TROUBLESHOOTING
AA
WARNING
ELECTRIC SHOCK
can
kill.
Do not touch live electiical parts.
Turn Off
welding
power
source,
and discc
Input
power before inspecthg, maintaining,
servicing.
HOT PARTS
can cause severe
burns.
Allow cooling period before maintaining
or
servicing.
MOVING PARTS
can cause
injury.
Keep
away from
moving
parts.
Keep
away from
pinch points
such
as
drive rolls.
eshooting
to be performed
swam8.2~ 2/93
A. Overheating
Table 4-1. Maintenance Schedule
Thermostat TP1
protects
the unit from damage due to overheating. If main transformer
gets too hot, TP1 opens and
weld
output stops,
but fans keep running to
cool transformer. Wait several minutes before
trying
to
weld.
B. Motor Fuse Fl
If Fl opens, wire drive motor shuts
down. Replace
Flit open.
Reinstall wrapper and handle, and
latch door.
Tools Needed:
lime Maintenance
Before each
use.
Tighten all connections. Check gun and clean nozzle.
After each spool of wire. Blow
out
gun liner. Clean and check wire drive parts; replace
as
necessary.
Every 3 months.
Tape
or
replace cracked cables; clean and tighten connections. Replace
unreadable labels.
Every 6 months. Blow out
or
vacuum
inside of unit.
4-1. Overload Protection
I
~r1.~jj(~ READ
Sectio
SAFETY
n
4 befor
BLOCKS
at start of
e
proceeding.
____
AA
CAUTION
STATIC ELECTRICITY
can
damage parts
on
circuit boards.
Put
on
grounded wnst
strap BEFORE
handling
boards
or parts.
twam5.1~
9191
Turn Ott
and unplug unit. Unlatch
door,
remove
handle, and
remove
door/wrapper.
1 Circuit Board PCi
2 Fuse Fl (See
Parts List For
Rating)
Figure 4-1. Fuse Fl Location
~3
3/8 in
Ref. 91-801 785
OM-185 356 Page 9