Lincoln Electric IDEALARC R3R-300 Service Manual page 45

F-11
FIGURE F.1 – AC COIL INPUT CONTACTOR CONNECTIONS
TEST PROCEDURE
1. Disconnect the main input supply power to
the machine.
2. With the 5/16" nut driver, remove the case
top and the reconnect panel cover.
3. Locate the two leads connected to the input
contactor coil, #233 and X1 #232 (top). See
Figure F.1 for location.
4. Connect an AC voltmeter to the leads.
Electric Shock can kill.
TROUBLESHOOTING & REPAIR
INPUT CONTACTOR TEST (continued)
WARNING
• With the input power on,
there are high voltages
inside the machine. Do
not reach into
machine or touch any
internal part of
machine while
power is on.
IDEALARC R3R
5. Apply the correct voltage to the machine
and turn the power switch (S1) ON.
6. Check for 120VAC at the contactor coil
leads.
If the 120VAC is NOT present, with the
power switch (S1) on, check the power
switch (S1), thermostat, and associated cir-
cuitry. See the Wiring Diagram. Also per-
form the Control Transformer (T2) Voltage
Test.
If the 120VAC is present and the contactor
does NOT activate, then the input contactor
is faulty. Replace the input contactor.
the
the
the
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