Lincoln Electric IDEALARC CV-305 - Manual (Page 39)

FUNCTION PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
The meter does not light. The
machine operates properly.
1. The meter board may be faulty.
Contact your local Lincoln
Authorized Field Service
Facility.
1. Check for 5 VDC from lead
#208(+) to lead #210(-) at plug
J7 located on the meter board.
If the correct voltage is present
the meter board may be faulty.
Replace.
2. If the correct voltage is NOT
present at leads #208 and
#210, then check the continuity
(zero ohms) of the leads
between plugs J4 and J7. See
wiring diagram.
3. If the leads and connections
are good and the voltage is
NOT correct, then the control
board may be faulty. Replace.
The meter display reading is incor-
rect.
1. The meter voltage reading may
be different then the actual arc
voltage because the CV-305
meter is measuring voltage at
the machine's output terminals.
There may be a voltage drop in
the welding cables.
1. Check the continuity (zero
ohms) of the leads between plug
J7 on the meter board and plug
J4 on the control board.
2. Check for loose or faulty con-
nections on the feedback leads
#219, #218, #213B, #214B and
#224B. See wiring diagram.
3. Check the connections at the
shunt. See wiring diagram.
4. The meter board may be faulty.
Replace.
5. The control board may be faulty.
Replace.
TROUBLESHOOTING & REPAIR F-7 F-7
IDEALARC® CV-305
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