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13) COIL SHORTED 76
When the key is turned on, the microprocessor tests the overloads protection circuit
of the contactor driver. If a problem is detected, this alarm is generated. Possible
causes:
a) Failure within the contactor coil.
b) Incorrect wiring.
c) Failure of the protection circuit.
14) CONTACTOR DRIVER 75
This alarm is generated if there is a problem with the Main Contactor. Possible
causes:
a) The Main Contactor coil driver is open-circuit.
c) Defect in the Main Contactor coil voltage feed back circuit.
15) CONTACTOR CLOSED 37
This check is made before closing Main Contactor. It checks that the driver is not
open. Possible causes:
a) the contactor’s power poles are not welded.
b) This alarm could be generated if the line contactor is opened, but there is a
problem within the field circuit.
16) FORW + BACK 80
This check is made continuosly. The Alarm is generated when forward and reverse
directions are requested simultaneously. Possible causes:
a) Incorrect Wiring.
b) Welding or failure of a direction switch.
c) Incorrect operation from the operator.
17) BATTERY LOW 66
This Alarm is generated when the battery becomes 90% discharged from the
nominal value. If there is the alarm and the battery is not discharged, check the
battery value in the “Tester” menu of the console; if it is incorrect, re-adjust via the
“Adjustment” menu.
18) STBY I HIGH 53
This test is made during the initial diagnosis and in standby. The test verifies that
the currents are zero. This alarm disables the machine. Possible causes:
a) Defective current sensor.
b) Feed back circuit failure or logic failure or power unit failure.
19) BRAKE DRIVER KO 2
The alarm is present when there is a problem on the electrobrake driver. Possible
causes:
a) driver in short-circuit
b) driver broken, cannot drive the brake;
c) current feedback circuit for the brake coil faulted
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