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E-4
TROUBLESHOOTING
E-4
POWER WAVE® 655/R
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
CAUSE
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Thermal LED is lit.
Machine won’t weld, can’t get any
output. (CR1 will not pull in.)
Arc loss fault on robot
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 lou-
vers, or for excessive dirt clog-
ging 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 lou-
vers.
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.
Possibly caused by wire feeding
problem. Possible caus-
es/solutions are:
1. Problem - Conduit leading to the
wire feeder has bends or twists,
which can reduce the wire feed
speed.
Solution - Remove bends and
twists from conduit.
2. Problem – Conduit leading up to
the wire feeder from the wire reel
is too long.
Solution – Use a shorter length of
conduit
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.