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OUTPUT PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
Machine is dead. No output - No
fan-No115VACatreceptacle.
1. Make sure that the input power
switch is in the "ON" position
and the machine is plugged in.
2. Check the input voltage at the
machine. Input voltage must
match the rating plate and volt-
age connection. Refer to
Reconnect Procedure in the
Installation section of this manu-
al.
3. Blown or missing fuses in the
input line.
4. CB-1 circuit breaker open.
1. Check the input power switch
and associated wires for loose
or faulty connections.
2. Perform the T1 Transformer
Test.
The fan runs normally. No output
from the machine in either Stick or
TIG modes.
1. Check for proper input voltages
per nameplate and voltage
reconnect configuration.
2. Check to make sure the polarity
switch is in the proper position
and functioning correctly.
1. Check for loose or faulty con-
nections on the heavy current
carrying leads. (polarity switch,
output choke output terminals
etc.)
2. Perform the T1 Transformer
Test.
3. Perform the SCR Bridge Test.
4. Check current control R1 for
proper operation. Normal
resistance is 10,000 ohms.
Also check associated leads
for loose or faulty connections.
5. The control board may be
faulty. Replace.
TROUBLESHOOTING AND REPAIR
F-4 F-4
PRECISION TIG® 225
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