Zapi COMBI AC1 User Manual

- If no problem are found on the motors, the problem is inside the
controller.
3) “VMN HIGH”
Cause 1:
Before switching the LC on, the software checks the power bridge: it turns on
alternatingly the Low side Power Mosfets and expects the phases voltage to
decrease down to -BATT. If the phases voltage do not decrease, this alarm
occurs.
Cause 2:
This alarm may occur also when the start up diagnosis is overcome, and so
the LC is closed. In this condition, the phases’ voltages are expected to be
lower than 1/2 Vbatt. If it is higher than that value, fault status is entered.
Troubleshooting:
A) If the problem occurs at start up (the LC does not close at all), check:
- Motor internal connections (ohmic continuity)
- Motor power cables connections
- If the motor connection are OK, the problem is inside the controller
B) If the problem occurs after closing the LC (the LC closed and then opens
back again), check:
- Motor connections
- If motor phases windings/cables have leakages towards truck frame
- If no problem are found on the motors, the problem is inside the
controller
4) “POWER MOS SHORTED”
Cause:
Before switching the LC on, the software checks the power bridge: it
turns on alternatingly the Low side and High side Power Mosfets and expects
the phases voltage to decrease down to –BATT (increase up to +Batt). If the
phases voltage do not follow the comands, this alarm occurs.
Troubleshooting:
This type of fault is not related to external components; replace the controller.
5) “COIL SHORT HW KO”
Cause:
The hardware circuits which manages short circuits protection of LC and EB
coils has a problem.
Troubleshooting:
This type of fault is not related to external components; replace the controller.
6) “COIL SHORTED”
Cause:
This alarm occurs when there is a short circuit of one of the coils connected
to outputs of the Combiac1 (LC coil or EB coil). After the overload condition
has been removed, the alarm exits automatically by releasing and then
enabling a travel demand.
Troubleshooting:
A) The typical root cause for this error code to be displayed is in the harness
or in the load coil. So the very first check to carry out concerns
connections between controller outputs and loads.
B) In case no failures/problems have been found externally, the problem is
in the controller, which has to be replaced.
7) “DRIVER SHORTED”
Cause:
AEQZP0BA – COMBI AC1 - User Manual Page - 67/86

Zapi COMBI AC1 Specifications

General

Brand	Zapi
Model	COMBI AC1
Category	Inverter
Language	English