Lincoln Electric LN-9 SVM127-A Service Manual page 76

F-18
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The SET and actual speed meter
readings match within a few IPM,
but both are in error.
SET speed and actual speed meter
readings do NOT match within a
few IPM. One or both readings
may be erratic.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
METER FUNCTION PROBLEMS
1. Contact your local Lincoln
Authorized
Facility.
1. Contact your local Lincoln
Authorized
Facility.
CAUTION
LN-9 Wire Feeder
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Check to make sure the slotted
Field Service disc in the tach housing is
secure and aligned.
2. Perform the Meter Circuit
Accuracy Test.
3. The control board may be faulty.
Replace.
1. Check the Volts - Speed meter
Field Service selector switch and the associ-
ated wiring.
Diagram.
2. Check the SET - Actual switch
and the associated wiring. See
the Wiring Diagram.
3. Perform the Meter Circuit
Accuracy Test.
F-18
Observe Safety Guidelines
See the Wiring