Lincoln Electric SF7000 Operator's Manual page 17

SF7000, SF9000, SF12000, SF15000, SF19000, SF20000
PROBLEMS
(SYMPTOMS)
Motor does not start - Fan does not
function.
Motor makes a humming sound, but does
not function. Extraction capacity insuf-
ficient or no extraction at all.
Motor stops automatically. Fan does not
function.
Extraction capacity insufficient or no
extraction at all.
For troubleshooting of the variable frequency drive, see the corresponding manual.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
No mains voltage.
Mains cord defective.
Loose contacts.
Motor uses 2 phases instead of 3.
Motor defective.
Inverted direction of rotation of the motor.
Fan dirty.
False air is being sucked.
Filter of the connection filter system is
saturated.
VARIABLE FREQUENCY DRIVE
CAUSE
Fan:
E-2
TROUBLESHOOTING
RECOMMENDED
COURSE OF ACTION
Check the mains voltage.
Repair or replace the mains cord.
Repair the contacts.
Repair the phase connection.
Repair or replace the motor.
Change the direction of rotation.
Clean the fan.
Check or replace the sealing.
Replace the filter in the connected filter
system.