Zapi AC-2 User Manual download pdf (Page 75)

AF2ZP0CE - ACE2 350/450 - User Manual Page - 75/83

phases voltage to increase toward the rail capacitor value. If the phases

voltage is less than 66% of the rail capacitor voltage, this alarm occurs.

Cause 2:

Motor running test. When the motor is running, power bridge is ON, the motor

voltage feedback is tested; if it is lower than commanded value (a window of

values are considered) fault status is entered.

Troubleshooting:

- If the problem occurs at start up (the LC does not close at all), check:

- Motor internal connections (ohmic continuity)

- Motor power cables connections

- Motor leakage to truck frame

- If the motor connections are OK, the problem is inside the controller,

replace it.

- If the alarm occurs during motor running, check:

- Motor connections

- If motor phases windings/cables have leakages towards truck frame

- That the LC power contact closer properly, with a good contact

- If no problem are found on the motors, the problem is inside the

controller, replace it.

18) STBY I HIGH

Cause:

The current transducer or the current feedback circuit is damaged in the

controller.

Troubleshooting:

This type of fault is not related to external components so, when it is present,

it is necessary to replace the controller.

19) WRONG 0 VOLTAGE

Cause:

At start-up the high resolution VMN feedback is not comprised in a permitted

window of values centred around 2,5V. The circuit is damaged in the

controller.

Troubleshooting:

It is suggested to check:

- Motor internal connections (ohmic continuity)

- Motor power cables connections

- Motor leakage to truck frame

- If the motor connections are OK, the problem is inside the controller,

replace the logic board

20) CONTACTOR CLOSED

Cause:

Before driving the MC coil, the controller checks if the contactor is stuck. The

controller drives the bridge for some tens milliseconds, trying to discharge the

capacitors bank. If the capacitor voltage does decrease by 20% of the key

voltage the alarm is generated.

Troubleshooting:

It is suggested to verify the power contacts of LC; to replace the LC is

necessary.

21) HARDWARE FAULT 20

Cause:

Before driving the MC coil, the controller checks if the Mosfets drivers are

turned of by a not active (alarm status) Watch-dog signal. If they are not

turned of then the alarm is generated.

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Zapi AC-2 User Manual Page 75

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