Lincoln Electric IM718 POWER WAVE AC_DC - Manual (Page 33)

E-3 TROUBLESHOOTING E-3
POWER WAVE AC/DC
Observe all Safety Guidelines detailed throughout 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
Thermal LED is lit.
Machine won ’ t weld, can ’ t get any
output. (CR1 will not pull in.)
1. Machine ’ s thermostat has
opened. Check for proper fan
operation. There are two main
fans in the PowerWave AC/DC.
One machine is located in the
lower portion of the machine
which should be running when-
ever the machine is on. The
other fan is located in the upper
portion of the machine and only
runs when the machine is trig-
gered. Check for material block-
ing intake or exhaust louvers, or
for excessive dirt clogging coo-
ing channels in machine.
2. DC Bus PC board thermostat
has opened check for excessive
load on 40VDC supply.
3. Be sure process does not
exceed duty cycle limit of the
machine.
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 out-
put 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 authorized
Lincoln Electric Field Service
facility.
4. This problem will normally be
accompanied by an error code.
Error codes are displayed as a
series of red and green flashes
by the status light. See
"Troubleshooting the Power
Wave / Power Feed System
Using the Status LED" section
of this text.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.