American Dryer Corp. ADS-464 - Manual (Page 79)

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2a) PLC (Programmable Logic Controller) Output Signal Defective
3a) Motor Circuit Wiring
b) PROBABLE SOLUTIONS;
1b) Verify that all motor protection devices (manual starters) have their “START” buttons pushed in. If
any device has tripped, reset it and restart the dryer. If the same devices continue to trip:
• Verify current setting
• Check circuit
• Check motor
• Re-test
2b) Verify that the associated output L.E.D. (light emitting diode) on the PLC (Programmable Logic
Controller) is active. Verify that the associated output signal protection fuse is good. Check associated
PLC output circuit wiring to associated motor starter coil (“A” terminals).
3b) Re-test
4b) Check associated motor starter circuit wiring to and from motor starters, and to the associated motors
themselves. Refer to the ADS-464 Main Panel Wiring Diagram; re-test.