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TROUBLESHOOTING & REPAIR
INPUT CONTACTOR TEST (continued)
FIGURE F.12 – INPUT CONTACTOR CONNECTIONS
X1, #256
#255A
TEST PROCEDURE
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1.Disconnect the main input supply power to the machine.
2.With the 3/8” nut driver, remove the case top and input access cover.
3.Locate the three leads connected to the input contactor coil (X1/#256 and #255A). See Figure F.12.
4.Connect an AC voltmeter to the leads.
WARNING
ELECTRIC SHOCK can kill.
• Do not touch electrically hot parts.
5.Apply the correct
6.Check for 120 VAC at the contactor coil leads.
7.If the 120 VAC is NOT present, with the input power switch (SW1) on, check the switch and associated circuitry. See the Wiring Diagram. Also see the Control Board LED Chart. Relay CR2 may be faulty. See the Wiring Diagram. Perform the Control
Transformer (T2) Test.
8.If the 120 VAC IS present and the contactor does NOT activate, the input contactor is faulty. Replace the input contactor.
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