American Dryer Corp MLS-460 manual Fuse 4 on Main Electrical Panel Faulty Switches, Wiring Diagram

•Release the REVERSE Push-button

•Does PLC (Programmable Logic Controller) input L.E.D. #18 go “OFF”?

•If the answers to these questions are “YES,” wiring to the PLC is correct.

•If any answer to these questions is “NO,” refer to Probable Causes below

•Tumbler Forward Switch --- PB1

For quick check of the wiring of PB1 to the PLC (Programmable Logic Controller) perform the following test with the control voltage “ON” (“green” button).

•Press the FORWARD Push-button.

•Does PLC (Programmable Logic Controller) input L.E.D. #17 light?

•Release the REVERSE Push-button.

•Does PLC (Programmable Logic Controller) input L.E.D. #17 go “OFF”?

•If the answer to these questions are “YES,” wiring to the PLC (Programmable Logic Controller) is correct.

•If the answer to these questions are “NO,” refer to Probable Causes below

a. PROBABLE CAUSES;

1)FUSE 4 ON MAIN ELECTRICAL PANEL

2)FAULTY SWITCHES

3)WIRING BACK TO PLC (Programmable Logic Controller)

b.POSSIBLE SOLUTIONS;

1)Check fuse blown indicator on fuse 4; replace fuse, if necessary and retest.

2)Check switches using an OHM meter; replace if necessary, and retest.

3)Refer to MLS-460 Pendant associated wiring diagrams for detailed assembly and wiring information. Check ALL circuits back to PLC (Programmable Logic Controller).

•MLS-460 PENDANT ASSEMBLY DIAGRAM

•MLS-460 ANNUNCIATOR, PENDANT, and UPPER RTD’S (Resistive Temperature Device)

WIRING DIAGRAM

•“EMERGENCY STOP” (E-Stop) SWITCH --- PB6

If the “EMERGENCY STOP” (E-Stop) switch (pendant) does not respond:

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