Lincoln Electric POWER WAVE 11124 - Manual (Page 54)

E-3 TROUBLESHOOTING E-3
POWER WAVE® AC/DC 1000
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
Observe all Safety Guidelines detailed throughout this manual
Machine won’t weld, can’t get any
output. (CR1 will not pull in.)
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(s). See "Status
Light" section of this document for
additional information.
Thermal LED is on.
1. Input voltage is too low or too
high.
2. Thermal Error.
3. Primary current limit has been
exceeded. (CR1 drops out when
output is initiated).
4. Inverter Fault - switch pc board,
contactor problem, etc.
1. Improper fan operation.
2. Switch Board or AC Output
Chopper board thermostat.
3. DC Bus PC board thermostat
4. Open thermostat circuit.
1. Make certain that input voltage is
proper, according to the Rating
Plate located on the rear of the
machine.
2. See "Thermal LED is ON" sec-
tion.
3. Possible short in output circuit.
Turn machine off. Remove all
loads from the output of the
machine. Turn back on, and acti-
vate output. If condition persists,
turn power off, and contact an
authorized Lincoln Electric Field
Service facility.
4. Contact your local authorized
Lincoln Electric Field Service
facility for technical assistance.
1. Check for proper fan operation.
(Fans should run whenever out-
put power is on.) Check for
material blocking intake or
exhaust louvers, or for excessive
dirt clogging cooing channels in
machine.
2. After machine has cooled,
reduce load, duty cycle, or both.
Check for material blocking
intake or exhaust louvers.
3. Check for excessive load on
40VDC supply.
4. Check for broken wires, open
connections or faulty ther-
mostats DC Bus, Switch, and AC
Chopper PC Board heat sinks.
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION