b. Reverse meter leads and reading should be 50 ohms
or less. To test for ammeter harnessing, place meter
across terminals TB1-7 and TB1-8, reading should
be approx. 1 ohm.
E. TEST FOR MOTOR CONNECTION
1. For permanent-magnet motors such as EH-10, EH-
11, check for continuity between TB1-13 and TB1-14.
Reading should be approx. 5 ohms.
2. For shunt-wound motors such as EH-2, EH-3, check
for continuity between P7-A and P7-B. Reading
should be approx. 500 ohms.
3. Check for shorts between TB1-13 and ground stud;
check for continuity between P7-B and ground stud.
Both readings should be infinity.
F. RESULTS
If any of the readings do NOT correspond with the read-
ings above, DO NOT APPLY POWER. Instead, check
all connections between components until the problem
is found and corrected.
If all readings correspond with the readings above, place
"MLS" switch in the OFF position and re-install the printed
circuit boards inside the control. UEC-8 is now ready
for operation.
G. LED INDICATOR LIGHTS
There are three LED indicator lights mounted on the PC
boards that will help in setting up the equipment and in
troubleshooting. Two of the lights are located on the
Logic Board (675330) and one on the Reversible Gov-
ernor Board (675332).
In setting up the equipment, the indicating light (REV-
LED) on the Reversible Gov. Board (675332) is of main
concern. (Refer to Fig. 5)
1. The control and wire feeder should be set up such
that when the inch switch is depressed in the down
position the motor should be feeding forward. If the
motor feeds in the reverse direction, reverse the yel-
low and gray armature leads at TB1-13 and TB1-14.
2. To double check motor setup, perform this final test:
Depress inch up switch and see if indicating light on
the Reversible Gov. Board is dimly lit. The unit should
not be operated if the indicating light is not on.
The other two lights are located on the logic board (Fig.
6) and marked C-DET and V-DET. These lights will be
illuminated only when welding currents and welding volt-
ages are detected.
