American Dryer Corp. ADS-464 - Manual (Page 71)

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2. WIRING BACK TO THE PLC (Programmable Logic Controller), 0, 8
a) PROBABLE CAUSES;
1. CLOGGED LINT SCREEN OR LINT BAG
2. AIR PRESSURE SETTING
3. AIR PRESSURE SWITCH - PS3 OR WIRING BACK TO THE PLC (Programmable Logic
Controller)
b) POSSIBLE SOLUTIONS;
1. Perform preventive maintenance and screen cleaning procedures.
2. Set correct pressure settings.
3. For a quick check of the AIR PRESSURE SWITCH WIRING, perform the following:
- Run a drying cycle
- Does the pressure switch’s indicator come “ON”?
- If “YES,” switch and its adjustment
- If “NO,” check switch and its adjustment
- Verify that PLC (Programmable Logic Controller) input L.E.D. #5 comes “ON”
- Does L.E.D. #5 come “ON” when the switch is active?
- If “YES,” wiring is OK
- If “NO,” check:
- Switch, its setting and wiring
- Check wiring back to the base electrical junction box
- Check PLC (Programmable Logic Controller)
- Refer to blueprints: Main Electrical Panel Diagram, Base Junction Box Wiring Diagram
- Re-test; verify that the signal is operational