Zapi ACE0 2mC User Manual

Page – 128/155 AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual
Troubleshooting
- Check that the battery has the same nominal voltage of the inverter.
- Check the battery voltage, if it is out of range replace the battery.
- If the battery voltage is ok, replace the logic board.
VKEY OFF SHORTED (MDI/LED code = 20)
Cause
At key-on, the logic board measures a voltage value of the KEY input that is
constantly out of range, below the minimum allowed value.
Troubleshooting
- Check that the battery has the same nominal voltage of the inverter.
- Check the battery voltage, if it is out of range replace the battery.
- If the battery voltage is ok, replace the logic board.
VMN HIGH (MDI/LED code = 31)
Cause 1
Before switching the LC on, the software checks the power bridge: it turns on
alternatively the low-side power MOSFETs and expects the phase voltages
decrease down to -B. If the phase voltages are higher than a certain
percentage of the nominal battery voltage, this alarm occurs.
Cause 2
This alarm may also occur when the start-up diagnosis has succeeded and
so the LC has been closed. In this condition, the phase voltages are
expected to be lower than half the battery voltage. If one of them is higher
than that value, this alarm occurs.
Troubleshooting
- If the problem occurs at start-up (the LC does not close), check:
- motor internal connections (ohmic continuity);
- motor power cables connections;
- if the motor connections are OK, the problem is inside the controller.
Replace it.
- If the alarm occurs while the motor is running, check:
- motor connections;
- that the LC power contact closes properly, with a good contact;
- if no problem is found, the problem is inside the controller. Replace it.
VMN LOW (MDI/LED code = 30)
Cause 1
Start-up test. Before switching the LC on, the software checks the power
bridge: it turns on alternatively the high-side power MOSFETs and expects
the phase voltages increase toward the positive rail value. If one phase
voltage is lower than a certain percentage of the rail voltage, this alarm
occurs.
Cause 2
Motor running test. When the motor is running, the power bridge is on and
the motor voltage feedback tested; if it is lower than expected value (a range
of values is considered), the controller enters in fault state.
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;

Zapi ACE0 2mC Specifications

General

Brand	Zapi
Model	ACE0 2mC
Category	Inverter
Language	English