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E-4
TROUBLESHOOTING
E-4
POWER WAVE 455
Observe all Safety Guidelines detailed throughout this manual
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact your local authorized Lincoln Electric Field Service Facility for technical assistance.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Wire feeder won’t work. No lights,
apparently no power to wire feeder.
Thermal LED is lit.
Machine won’t weld, can’t get any
output. (CR1 will not pull in.)
1. Circuit breaker CB1 (on case
front) may have opened.
Reset.
2. Control cable between the
power source and wire feeder
is “open”. Check continuity on
all 5 leads from end to end in
the control cable.
3. Check for 40 volts DC on pins
D (+40) and E (common) of
the Wire Feeder Receptacle.
If 40 volts DC is not present,
and CB1 is reset, contact an
authorized Lincoln Electric
Service facility.
1. Fan thermostat has opened. Check
for proper fan operation. (Fan should
run whenever main power is on.)
Check for material blocking intake or
exhaust louvers, or for excessive dirt
clogging cooing channels in machine.
2. Secondary rectifier thermostat has
opened. After machine has cooled,
reduce load, duty cycle, or both.
Check for material blocking intake or
exhaust louvers.
1. Input voltage is too low or too high.
Make certain that input voltage is
proper, according to the Rating Plate
located on the rear of the machine.
2. If the Thermal LED is also lit, see
“Yellow Thermal LED is Lit” section.
3. Primary current limit has been
exceeded. Possible short in output
circuit. Turn machine off. Remove all
loads from the output of the machine.
Turn back on. If condition persists,
turn power off, and contact an autho-
rized Lincoln Electric Field Service
facility.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.