Troubleshooting Guide - Lincoln LT-7 Troubleshooting Manual

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Troubleshooting Guide –
components. See Wiring Diagrams for troubleshooting of specific circuits.
PROBLEMS
(SYMPTOMS)
Wire does not feed. No inch up or
down. Wire does NOT feed when
start switch is activated.
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 electrical technical troubleshooting assistance before you proceed.Call 216-383-2531 or 1-800-
833-9353
TROUBLESHOOTING AND REPAIR
See Wiring Diagrams for location of specified
FIELD
COURSE OF ACTION
FUNCTIONAL PROBLEMS
1. Make sure the Power Switch
(S1) is on and functioning prop-
erly.
2. Check the circuit breaker locat-
ed on the front cover. If tripped
- reset. If circuit breaker repeat-
edly trips consult appropriate
("PROBLEMS (SYMPTOMS").
3. Open the front cover and inner
panel to check if any of the
LEDS on the printed circuit
boards are lit. If none of the
LEDS are lit, this is an indica-
tion that the LT7 is NOT receiv-
ing any power. Check the 2/10
amp fuse on the control board.
Also make sure that 115VAC is
being received on leads #531
and #532. See wiring diagram.
LT-7 TRACTOR
RECOMMENDED SHOP
COURSE OF ACTION
1. Check lights 1C and 1D on the
2. Press the inch up switch. Lights
3. If light 1D and 1E are lit and the
4. Perform the Wire Drive Motor
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual.
control board. If both lights are
lit at the same time replace the
control board.
1D and 1E, on the control board
should be lit. If they are NOT lit
the control board may be faulty.
wire drive motor does not turn
check the continuity of leads
#539, #541, #626 and #627
from the control board to the
wire drive motor.
Test .
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