Lincoln Electric IDEALARC CV-300 Service Manual page 45

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TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
The meter does not light.
machine operates properly.
The meter display reading is incor-
rect.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call
216-383-2531 or 1-888-935-3877
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
FUNCTION PROBLEMS
The 1. The meter board may be faulty.
Contact your local Lincoln
Authorized Field Service Facility.
1. The meter voltage reading may
be different then the actual arc
voltage because the CV-300
meter is measuring voltage at
the machine's output terminals.
There may be a voltage drop in
the welding cables.
CAUTION
IDEALARC CV-300
RECOMMENDED
COURSE OF ACTION
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 pre-
sent at leads #208 and #210,
then check the continuity (zero
ohms) of the leads between
plugs J4 and J7. See wiring dia-
gram.
3. If the leads and connections are
good and the voltage is NOT
correct, then the control board
may be faulty. Replace.
1. Check the continuity
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.
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(zero