Troubleshooting - Lincoln Electric CV ADAPTER IM309-D Operator's Manual

D-2
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
1. With CV Adapter in CV position:
a. Open circuit voltage is 60 to
70 volts and cannot be adjust-
ed.
b. Open circuit voltage cannot be
adjusted above 38 volts.
c. Open circuit voltage can be
adjusted to 60-70 volts instead
of the normal maximum 36 to
48 volts.
2. On SA-250, open circuit voltage
remains at 5 to 10 volts and can-
not be adjusted.
3. No CV control of output voltage.
(1) These fuses are not on earlier units.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local
Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

TROUBLESHOOTING

COURSE OF ACTION
FUNCTION PROBLEMS
A. For Codes below 10400 and 10664 and 10665.
Check to see if DC field circuit is grounded to frame of welder. If grounded, remove
ground. Then check 1/8 (1) amp fuse on CV Adapter PC board and replace if blown.
(Grounded DC field circuit may or may not cause fuse to blow.) NOTE: On SAE-300,
SAE-400 and SAE-400 WELD'N AIR Engine Welders with AC auxiliary output, discon-
nect one side of flashing diode. On SAE-300, SAE-400 and SAE-400 WELD'N AIR
machines above Code 8812 or SAE-350 machines also disconnect SAE green lead from
CV Adapter lead 613.
NOTE: ON SAE UNITS BELOW CODE 9936, THE SAE GREEN
LEAD WAS RED.
Reconnect the above items after trouble is determined and resolved.
B. For Codes 10601,10602,10856,10884 and 10885.
Verify that the diodes in the lead between D1 negative and the ground
screw are not shorted and are oriented properly. Check 1/8 amp fuse
on CV adapter PC board and replace if blown.
A. Check to see if DC field circuit is grounded to frame of welder. If
grounded remove ground. Then check if either 5
in CV Adapter box is blown and replace if blown. (Grounded DC field
circuit may or may not cause fuse to blow.) Also check if 2 amp fuse
on CV Adapter PC board is blown and replace if blown.
A. Lower CV Adapter mode switch in wrong position.
B. On SA-200, SA-250, Classic I and Classic II, thermostat tripped. Wait
for machine to cool down.
C. 2 amp fuse blown on CV Adapter PC board — replace fuse.
D. Output not connected to the proper output terminals. See manual for
proper connections.
E. Defective lower mode switch — replace 3PDT toggle switch (Sl).
F. Defective relay — replace relay.
G.Defective CV Adapter PC board — replace PC board.
CAUTION
CV ADAPTER
RECOMMENDED
(1)
D-2
amp fuse mounted