Lincoln Electric IM917 POWER WAVE 405M - Manual (Page 33)

E-5 TROUBLESHOOTING E-5
POWER WAVE® 405M
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
CAUSE RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Thermal LED is lit.
Machine wonʼt weld, canʼt get any
output.
1. Fan thermostat has opened.
Check for proper fan operation.
(Fan should run whenever output
power is on.) Check for material
blocking intake or exhaust louvers,
or for excessive dirt clogging cool-
ing channels in machine. Blow air
in rear louvers to remove dirt
around the fan.
2. Secondary rectifier or Choke ther-
mostat has opened. After machine
has cooled, reduce load, duty
cycle, or both. Check for material
blocking intake or exhaust louvers.
3. DC Bus PC board thermostat has
opened check for excessive load
on 40VDC supply.
1. Input voltage is too low or too
high. Make certain that input volt-
age 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” sec-
tion.
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 condi-
tion 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.