Zapi AC-2 User Manual download pdf (Page 77)

AF2ZP0CE - ACE2 350/450 - User Manual Page - 77/83

27) LOGIC FAILURE #2

Cause:

Fault is in the hardware section of the logic board which manages the

phase’s voltage feedback.

Troubleshooting:

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

is necessary to replace the ACE2 logic board.

28) CONTACTOR DRIVER

Cause:

The MC coil driver is not able to drive the load. The device itself or its driving

circuit is damaged.

Troubleshooting:

This type of fault is not related to external components; replace the ACE2

logic board.

29) AUX DRIVER OPEN

Cause:

The EB/AUX coil driver is not able to drive the load. The device itself or its

driving circuit is damaged.

Troubleshooting:

This type of fault is not related to external components; replace the ACE2

logic board.

30) ENCODER ERROR

Cause:

This fault is signalled in following conditions: the frequency supplied to the

motor is higher than 40 Hz and the signal feedback from the encoder has a

jump higher than 40 Hz in few tens mSec. This condition is related to a

malfunctioning of the encoder.

Troubleshooting:

- Check both the electric and the mechanical encoder functionality, the

wires crimping.

- Check the encoder mechanical installation, if the encoder slips inside its

compartment raising this alarm condition.

- Also the electromagnetic noise on the sensor bearing can be a cause for

the alarm. In these cases try to replace the encoder.

- If the problem is still present after replacing the encoder, the failure is in

the controller.

31) WRONG RAM MEMORY

Cause:

The algorithm implemented to check the main RAM registers finds a wrong

contents: the register is “dirty”. This alarm inhibit the machine operations.

Troubleshooting:

Try to switch the key off and then on, if the alarm is still present replace the

ACE2 logic board.

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Zapi AC-2 User Manual Page 77

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