Description

ZAPI AC0 Controller fault code

1) CAPACITOR CHARGE

MDI-PRC Code = 60

– Cause: In working condition, a resistance connected between the key

and the Rail Capacitors, keeps the Rail Capacitors charged

before the Main Contactor closes.When the voltage on the Rail

Capacitors (measured on the phase V) is low and does not

increase when the main contactor is opened this alarm occurs.

– Remedy: Three possibilities:

– Another device, connected in parallel with the Rail

Capacitors, has a failure

– At least a motor phase is not connected to the controller orbroken.

– A Power failure or a Logic Failure occured in the controller.

In this case it is necessary to substituite the controller.

2) VMN HIGH  MDI-PRC Code = 31

– Cause: Before to switch the main contactor on, the SW turns on

sequencely the Bottom side Power Mosfets and expects the

phase V voltage falls to GND value. If the phase V remains

high level this alarm occurs.

– Remedy: Two possibilities:

– At least a motor phase is not connected to the controlleror broken.

– A Power Failure (e.g. a Bottom side Power Mosfet

opened) or a Logic Failure occured in the controller.

In this case it is necessary to substituite the controller

3) VMN LOW  MDI-PRC Code = 30

– Cause: Before to switch the main contactor on, the SW turns on

sequencely the Top side Power Mosfets and expects the phase

V voltage increases toward the rail capacitor value. If the phase

V does not increases this alarm occurs.

This alarm may occur also when the initial diagnosis is

overcome, and so the Main Contactor is expected to be

closed.Then, when the operator asks the truck moving but the

+Batt terminal of the controller is lower voltage than the Battery

voltage, this alarm occurs (Main Contactor has lost the

contactation although it is closed).

– Remedy: If the problem occurs before the Main Contactor closes,

probably a Power failure (e.g. a Bottom side Power Mosfet

short circuited or a Top side Power Mosfet broken) or a Logic

Failure occured in the controller. If the problem occurs when the

operator turns the truck moving the problem is the Battery

positive is not connected to the +Batt terminal of the controller

(check the continuity of the main contactor).

If the problem occurs permanently it is necessary to substituitethe controller.

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