4000 Switch Machine - Alstom

Amplifier FaultThe Amplifier fault function monitors the condition of the Amplifier. An amplifier fault canindicate several problems:1. Shorted power leads: Check the field terminations. Reset the Amplifier.2. Amplifier overheated: Turn off the switch machine for several minutes, then reset theAmplifier.3. Motor Overheated: Turn off the switch machine for several minutes, then reset theAmplifier.4. Under-voltage Condition: Check switch machine supplied voltage and verify it is withinspecification.5. Short in internal wiring harness.6. Faulty Amplifier: Reset the Amplifier. If that doesn’t work, replace the Amplifier.There are three methods to reset the amplifier for an overload or amplifier fault.Note: The amplifier fault LED will remain lit until the amplifier is reset.1. There is a reset switch on the side of the amplifier. This switch can be used if power issupplied to the amplifier.2. The amplifier is reset by removing power from the system and a switch call is issued.3. The amplifier is reset by calling the machine to move in the opposite direction, (i.e. if themachine reaches the current limit in the normal direction, the amplifier is reset by callingthe machine to the reverse direction).A motor fault can only be cleared by depressing the amplifier reset switch while supply power isapplied to the amplifier.Amplifier FuseThere is a 1-amp, 3AG fuse located on the bottom of the amplifier. This fuse is in series with thelow-voltage control input on the amplifier. The fuse protects the amplifier from hooking up thehigh-voltage motor power to the low-voltage control in the 4-wire configuration.P2444, Rev. Jan/07 5-6ALSTOM Signaling Inc.