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F-7
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The Beeper (Piezoelectric Buzzer) cannot be
heard – machine operating normally.
The welding parameters that were
saved in memory are different
when recalled.
The water cooler does not turn on.
The machine beeps without the
keys being pressed.
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.
TROUBLESHOOTING
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Background noise may be too loud for user
to hear beeper.
1. Make certain that a remote control unit is
not connected. When a remote control unit is
used, the weld parameters are set by the
remote control potentiometers.
1. Make sure that the water cooler has been
enabled. Refer to the Setup Overlay descrip-
tion in the Operation Section of this manual.
2. The cooler's circuit breaker may have tripped.
3. If the water cooler is enabled but generates
insufficient coolant pressure, the machine will
beep loudly and the water cooler will shut
down. In this case, prime the water cooler.
Refer to the Setup Overlay description in the
Operation Section of this manual.
If the water cooler is enabled and the pres-
sure switch inside the water cooler opens (due
to inadequate coolant pressure), the machine
indicates this by beeping. This happens
regardless of the overlay placed on the
machine. In this case do the following:
1. Turn the machine off and on a couple of
times and see if the beeping continues. If the
pressure dropped momentarily then turning
the machine off and on eliminates the beep-
ing. A momentary pressure drop could be due
to someone stepping on the water cooler
hose, for example.
2 Check the water cooler and accessory
hoses for kinks, internal obstructions or block-
age, or ruptures. If such problems were found
then correct them and turn the machine off
and on to check if the beeping has been elimi-
nated.
3. Check the water cooler fluid level. Low coolant
level could cause the pressure to drop.
4. Prime the water cooler. Refer to the Setup
Overlay section of this manual for instructions.
CAUTION
POWER WAVE 450
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of misadjustments have been
checked and the problem per-
sists, contact your local Lincoln
Authorized Field Service Facility.
F-7
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Table of Contents
Troubleshooting
