Lincoln Electric IM852 CV ADAPTER - Manual (Page 17)

E-2 TROUBLESHOOTING E-2
CV ADAPTER
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS
RECOMMENDED
COURSE OF ACTION
With CV Adapter in CV position:
• Open circuit voltage is 60 to 70
volts and cannot be adjusted.
• Open circuit voltage cannot be
adjusted above 38 volts.
• Open circuit voltage can be
adjusted to 60-70 volts instead of
the normal maximum 36 to 48
volts.
No CV control of output voltage.
1. 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-400 and SAE-400
WELD’N AIR Engine Welders with
AC auxiliary output, disconnect one
side of flashing diode. On SAE-400
and
SAE-400 WELD’N AIR
machines above Code 8812 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.
2. 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.
1. Lower CV Adapter mode switch in
wrong position.
2. 2 amp fuse blown on CV Adapter
PC board — replace fuse.
3. Output not connected to the prop-
er output terminals. See manual
for proper connections.
4. Defective lower mode switch —
replace 3PDT toggle switch (Sl).
5. Defective relay — replace relay.
6. Defective CV Adapter PC board
— replace PC board.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
FUNCTION PROBLEMS