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- Check wiring on the MAIN ENCLOSURE PANEL (Refer to the ADS-464 Main Panel Wiring
Diagram)
- Check wiring associated with Solenoid Junction Box.
- See troubleshooting procedures associated with the Solenoid Junction Box.
3b) Input L.E.D. (light emitting doide) not illuminating correctly on the PLC (Programmable Logic Controller)
indicates that the signal to the PLC input is missing or the PLC is defective.
- Check FUSE 2 on the main electrical panel
- Check wiring back to the tumbler junction box
- Check wiring back to the rear controls
- Check PLC
- Refer to blueprints
- Main electrical panel diagram
- Tumbler Jjunction box wiring PLC (Programmable Logic Controller) diagram
- Rear panel controls wiring diagram
- Re-test; verify that the signal is operational
3.0 “DOOR Open” Problem
A “DOOR OPEN” message is generated by either the heater, load, or unload doors. The following information
will address the load and unload doors signals, since they are associated with the tumbler junction box.
a) PROBABLE CAUSES;
1. WIRING BACK THE PLC (Programmable Logic Controller)
DS1-B=LOAD DOOR SWITCH
DS2-B=UNLOAD DOOR SWITCH
b) POSSIBLE SOLUTIONS;
1. For quick check of LOAD and UNLOAD signals of the PLC perform the following:
- Remove factory air from the dryer
- With the Control Voltage “ON”, open the LOAD doors and locate the LOAD door switch actuator
- Cycle the switch by hand and have someone watch PLC input indicator #6. It should go “ON”
when the switch is down.