Valley FABRICATOR 251 Service Manual - Fabricator 251
7-2
August 22, 2008
FABRICATOR 251
SERVICE MANUAL
7.02 Initial Setup Conditions
Set the power supply controls and connect cables as
follows:
1. ON/OFF Switch to OFF Position
2. MIG GUN / SPOOL GUN SELECTOR SWITCH to MIG
GUN position
3. WIREFEED SPEED CONTROL to "4"
4. COARSE VOLTAGE SELECTOR SWITCH to position "1"
5. FINE VOLTAGE SELECTOR SWITCH to position "1"
6. WELD (SPOT/STITCH) TIMER CONTROL to minimum
7. WELD MODE SWITCH to position "2T"
8. DWELL STITCH TIMER CONTROL to minimum
9. BURNBACK CONTROL to minimum
10. Disconnect & Isolate the GUN POLARITY LEAD from
OUTPUT WELDING TERMINALS
11. Connect Work cable to (-) NEGATIVE OUTPUT
WELDING TERMINAL
12. Disengage PRESSURE ADJUST DEVICE so wire will
not feed (See figure 3-10)
7.03 Primary Power Test
A. Close primary disconnect device and observe the
following:
1. Green Indictor Lamp inside ON/OFF Switch
illuminates
B. Set ON/OFF Switch to ON position and observe the
following:
1. Fan turns on
2. Digital Display turns on.
The meter has two display modes: Voltage or
Amperage. If last displayed character on the left
is "A", depress the VOLTAGE / AMPERAGE
SELECTION Switch once. The left character will
change to "V".
This completes the Primary Power Test. If the above are
all correct then proceed to paragraph 'B'. If the above
does not function as noted then note the symptom and
proceed to Section 7.08 Primary Power Problems.