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TROUBLESHOOTING & REPAIR
INPUT CONTACTOR TEST (continued)
FIGURE F.4 – DC COIL INPUT CONTACTOR TEST POINT LOCATIONS
A
REMOVED)
A
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TEST FOR CONTACT CONTINUITY
1.Disconnect the main input supply power to the R3R machine.
2.Remove the two leads connected to the input contactor coil, #232A and #233A.
3.Using the external 120VDC supply, apply 120VDC to the terminals of the input con- tactor coil. If the contactor does NOT acti- vate, the input contactor is faulty. Replace the input contactor.
4.With the contactor activated, check the con- tinuity across the contacts. (Zero ohms or very low resistance is normal). See Figure F.4. If the resistance is high, the input con- tactor is faulty. Replace.
5.When the contactor is NOT activated, the resistance should be infinite or very high across the contacts. If the resistance is low, the input contactor is faulty. Replace the input contactor.
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