TABLE IV. Troubleshooting Control (Figs. 7 and 8)
Symptom
Probable Cause
Remedy
Power-On Lamp atop Control does not
a. No primary power
a. Connect power cord
glow with main power switch ON
to primary source.
b. Defective fuse F101 or F102
b. Replace.
c. Defective lamp
c. Replace.
d. Defective switch
d. Replace,
No welding arc with power on and gun
a. Replace.
a. Defective control relay CR103
trigger depressed
b. Replace.
b. Defective control relay CR101
c. Defective wiring associated
c. Check continuity
with steps a, b, or c, above
and repair or re-
place.
d. Defective transformer T101
d. Replace.
a.
Replace.
No wire feed with power on and gun
a.
Defective control relay CR104
trigger or jog depressed
b.
Defective control relay CR105
b.
Replace.
c.
Replace
c.
Defective thyratron V101
d.
Defective amplifier V105
d.
Replace.
e.
Defective regulator V103, V104
e.
Replace.
f.
Replace.
f.
Defective rectifier V102
g.
Defective transformer T102
g.
Replace.
h.
Replace.
h.
Defective reactor SX101
Defective transformer T101
i.
Replace,
i.
a. Replace.
a, Defective control relay CR103
No wire feed with power on, wire
b. Replace neces-
selector switch SW102 in RUN-IN
b. Check steps b through i above
for wire jog condition
sary parts.
position, gun trigger depressed
a. Replace,
No wire feed with power on, wire
a. Defective control relay CR103
b. Replace
selector switch SW102 in SCRATCH-
b. Defective control relay CR102
C. Check steps b through i above
c, Replace neces -
START position, gun trigger de-
sary parts.
pressed, and wire electrode scratched
for wire jog condition
d. Replace.
d. Defective control relay CR101
on work
a. Replace.
No gas or water flows with power on,
a. Defective control relay CR103
b. Replace.
b. Defective time-delay relay
and gun trigger depressed
TDR101
c. Repair or re-
c. Defective wiring to gas or
place.
water solenoid in Wire Feeder
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