Zapi AC-2 User Manual download pdf (Page 68)

Page - 68/72 ADEZP0DC - AC-2 FLASH INVERTER - User Manual

4) LOGIC FAILURE #2

Fault in the hardware section of the logic board which manages the phase' s

voltage feedback. Replace the logic board.

5) LOGIC FAILURE #3

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

current protection. Replace the logic board.

6) INCORRECT START

This alarm signals an incorrect starting sequence. Possible causes:

A) running microswitch failure;

B) error in sequence made by the operator;

C) incorrect wiring;

D) if the default persists, replace the logic.

7) ENCODER ERROR

Two consecutive readings of the encoder speed are too much different in

between: because of the inertia of the system it is not possible the encoder

changes its speed a lot in a short period. Probably an encoder failure has

occurred (e.g. one or two channels of the encoder are corrupted or

disconnected). Check both the electric and the mechanical encoder

functionality. Also the electromagnetic noise on the sensor bearing can be a

cause for the alarm.

8) CAPACITOR CHARGE

Follows the charging capacitor system:

When the key is switched ON, the inverter tries to charge the capacitors

through a power resistance and check if the capacitors are charged within a

timeout. If this is not true: an alarm is signalled; the main contactor is not

closed.

Possible reasons:

A) check if the charging resistance is opened.

B) The charging circuit has a failure.

C) There is a problem on the power modules.

9) VMN LOW, VMN HIGH

The test is carried out during initial diagnosis and in standby.

Possible causes:

A) problem with the motor connections or the motor power circuit; check if

the 3 phases are correctly connected; check if there's a dispersion of the

motor towards ground;

B) inverter failure, replace it.

10) PEDAL WIRE KO

This alarm is signalled if a fault is detected in the accelerator wiring (NPOT or

PPOT cable is interrupted).

11) VACC NOT OK

The test is made in standby. This alarm indicates that the accelerator voltage

is 1 V greater than the minimum value programmed by the PROGRAM

VACC function.

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Zapi AC-2 User Manual Page 68

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