Lincoln Electric IM558 Synergic 7 and 7H Water Cooled - Manual (Page 41)

E-10 TROUBLESHOOTING E-10
SYNERGIC 7 & 7H
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(S)
RECOMMENDED
COURSE OF ACTION
23. Display is blank a. Power source is OFF.
b. Feeder supply fuse or circuit
breaker at power source is blown
or tripped.
c. Display or Control PC board is
bad
a. Turn ON power source.
b. Check input cable and feeder unit for
short in 41 and 42 circuit. Check for
shorted motor. Replace fuse or reset
circuit breaker.
c. Observe LED mounted on Control PC
board. It should blink on and off at a
controlled rate of 1 second ON and 1
second OFF. If so, then replace
Display PC board. If not, replace
Control PC board. (See Procedure
for Replacing PC boards)