American Dryer Corp. ADS-464 Manuale Utente

3a) Malfunctioning operator interface terminal or communications cable.

4a) Malfunctioning 24 volt DC power supply.

5a) Malfunctioning hi-limit temperature controller.

b. POSSIBLE SOLUTIONS;

1b) Verify that fuses 7, 8, 9, and 10 are good.

Check that ALL fuse holder L.E.D. (light emitting diode) indicators are not lit

• If ALL fuses are good, go to  paragraph #2b below, paragraph #3b below, paragraph #4b

• If a fuse is bad, check the corresponding circuit, replace the fuse and test

2b) Malfunctioning PLC (Programmable Logic Controller).

• If PLC power is off, a “LINE FAULT MESSAGE” will be displayed on the operator interface

terminal.

NOTE: Call the ADC Service Department at (508) 678-9000.

3b) Malfunctioning operator interface terminal.

• Check power supply voltage to the operator interface terminal.  It should be  24 volts DC.

• Check that the interface cable to both the PLC and the operator interface terminal are secure.

NOTE: Call the ADC Service Department at (508) 678-9000.

4b) Malfunctioning 24 volt DC power supply.

• Verify that the power supply’s red “ON” light is illuminated.

• Verify that 110 volt AC supply is available and correct.

• Verify that the 4-40 mA (4-40 milliampere) transmitters or operator interface terminal  are  not

causing the power supply to fail.

• If the previous checked items are “OK,” replace the power supply.

5b) Malfunctioning hi-limit temperature controllers (HLS1 or HLS2).

• HLS1 - exhaust temperature hi-limit

• HLS2 - intake temperature hi-limit

HLS1 and HLS2 are monitored by a six (6) channel hi-limit temperature controller that once
triggered must be  manually reset.