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circuit break of motor coil.
(2) If actuation of main contactor is rigid and if there is
any wearing on contact?
(3) Change the controller .
Cause：During startup, the low-end voltage of MOS tube
is 10% higher than that of normal battery voltage or the
phase voltage is higher than 1/2 of battery voltage.
Possible cause：
(1) The wiring of motor is incorrect or there exists
problem in motor circuit . Check if three-phase connection
of motor is correct, if there is any leakage of electricity on
the ground and circuit break of motor coil. (2) Change the
controller
When the coil of main contactor is closed, the controller
should first check if the contact of main contactor is
adhered. Try to discharge the capacitance. If the
capacitance voltage is reduced by 20% of the battery
voltage, the fault possibly appears.
(1) Suggest to check if the contact of contactor is adhered
or change the contactor.
Logic card drives the coil of main contactor, but the
contactor does not close, possible causes:
(1) Mechanical fault and locking etc of contactor.
(2) Poor contact of contactor.
(3) If contactor works normally, change the controller.
The signal output by current sensor detected by
micro-control system exceeds the scope allowed for
non-operation current. The trouble has nothing to do with
the peripheral parts, so the controller needs to be changed.
When the electric lock is switch on, inverter will charge
the capacitance through power resistance and check if
capacitance is fully charged within the time stipulated,
otherwise, the capacitance voltage remains 20% lower
than battery voltage, the inverter will give alarm and the
main contactor will not close.
Possible causes：
(1) Peripheral equipment, e.g. DC-DC, motor or other
equipment etc interfere with the charging process of
controller and these interferences need to be eliminated.
(2) The charging resistance is disconnected, there is fault
on charging circuit and power module ,so controller needs
to be changed.
In case that total power is allowed, the temperature of
controller exceeds 85℃( it relates to the parameter
“ MAXIMUM CURRENT”.)
Their corresponding relations are as follows: Parameter
set alarm temperature
MAXIMUM CURRENT=50% 96℃
MAXIMUM CURRENT=60% 94℃
MAXIMUM CURRENT=70% 92℃
MAXIMUM CURRENT=80% 90℃
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