Table of Contents
Advertisement
E-2
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Thermal light comes on
Meter doesn't light up
Has output in
No gas & no hi-freq
Stick mode
but no output
in Tig mode
Gas & hi-freq are o.k.
No output in both Stick and Tig
modes
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.
TROUBLESHOOTING
POSSIBLE
CAUSE
OUTPUT PROBLEMS
1. Thermal shut down. Dirt and dust
may have clogged the cooling
channels inside machine; air
intake and exhaust louvers may
be blocked; welding application
may exceed recommended duty
cycle. Wait until machine cool
down and thermal light goes out.
Blow out machine with clean, dry
low pressure air; check air intake
and louvers; stay within recom-
mended duty cycle.
2. Bad thermostat or its connections
1. Losing AC supply to Control PC
board
2. Loosing input to machine
3. Faulty Control PC board
1. Faulty trigger or hand/foot Amptrol
or connections.
2. Faulty Protection PC board or
bad connection to Control PC
board
3. Losing trigger supply to Control
PC board
1. Faulty Control PC board
1. Bad connection at P4 of Control
PC board
2. Faulty Control PC board
CAUTION
PRECISION TIG 275
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of
misadjustment
have
checked and the problem persists,
Contact
your
local
Authorized Field Service Facility.
E-2
been
Lincoln
Advertisement
Table of Contents
Troubleshooting
