Description

ZAPI AC-2 Controller alarm code

12) STBY I HIGH

Test carried out in standby. Check if the current is 0. If not verified, an alarm

is signalled which inhibits machine operations. Possible causes:

1. A) current sensor failure;
2. B) logic failure: first replace the logic; if the defect persists, replace the power unit.

13) SEAT KO

This alarm is present in combi systems (traction + pump). The pump

compares the status of the seat input with the value transmitted by the

traction via CAN-BUS. The alarm is signalled if the two values are different in between.

14) DATA ACQUISITION

This alarm is signalled in the current gain acquisition phase. Wait the end of

the acquisition activity.

15) MAIN CONTACTOR ALARMS

In the combi system (pump + traction) the main contactor is driven by the

traction inverter. So the following description concerns the pump inverter

used independently from the traction inverter. In this configuration the pump

inverter manages its own main contactor.

COIL SHORTED

When the key is switched ON the µP checks the MC driver FF SR. If it

does not react in a correct way to the µP stimulus, the alarm is signalled.

Replace the logic board. The FF SR makes an hardware control of the

current in the MC coil. If this is too high, it opens the MC and the alarm is signalled.

Check if there are external shortcircuit and if the ohmic value of the MC is

correct; otherwise replace the logic.

–

DRIVER SHORTED

When the key is switched ON, the µP checks that the MC coil driver is

not shorted; if it is, this alarm is signalled; replace the logic board.

–

CONTACTOR DRIVER

When the initial diagnosis is finished, the traction logic closes the MC and

checks the voltage on the Drain of the driver. If this is not low, an alarm is signalled.

Replace the logic.

–

CONTACTOR OPEN

The main contactor coil has been driven by the logic board, but the

contactor does not close. Two possible reasons:

1. A) the wires to the coil are interrupted or not well connected.
3. B) the contact of the contactor is not properly working.

16) AUX OUTPUT KO

The µP checks the driver of the electromechanical brake. If the status of the

driver output does not correspond to the signal coming from the µP, the

alarm is signalled. Replace the logic.

17) HIGH TEMPERATURE

Inverter temperature is greater than 75 °C. The maximum current is reduced

proportionally to the temperature increase. The inverter stops at 100 °C.

If the alarm is signalled when the inverter is cold:

1. A) check the wiring of the thermal sensor;
2. B) thermal sensor failure;
3. C) logic failure.

Inquiry Us