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Drum Forward and Reverse Function
c) PROBABLE CAUSES;
2.1 Rear panel disconnect plug
2.2 Defective switches
2.3 Wiring back to the main electrical enclosure
d) POSSIBLE SOLUTIONS;
1. If either the Drum forward or reverse functions (rear) do not respond.
- Verify that the rear panel controls disconnect plug is indeed connected. This disconnect plug allows
for the removal of the rear control panel for dryer servicing.
2. Defective Forward and Reverse Switch
- Shut power off at the main breaker and remove the rear panel and check switches using an OHM
meter; replace if defective
- Re-test
3. Wiring Back to Main Electrical Enclosure
- With the control voltage “ON” front panel green button
- Select “1” on the “O UNLOAD 1” switch located on the rear controls panel.
- Have someone PRESS either the forward or reverse buttons while you watch the input L.E.D.’s
(light emitting diodes) of the programmable controller. Do the associated L.E.D.’s light?
PLC PIN 20 = DRUM FWD., REAR PANEL
PLC PIN 21 = DRUM REV., REAR PANEL
- If “YES,” refer to section 2.2.3 A
- If “NO,” refer to section 2.2.3 B
3b) The L.E.D.’s illuminating on the PLC (Programmable Logic Controller) indicate that the wiring to
the PLC is correct.
- Check FUSE 2 on the main electrical panel
- Check wiring back to the tumbler junction box
- Check wiring back to the rear controls