HELI CPD20 - Page 46

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17
LOGIC
FAILURE #3
Logic card
failure 3
Current protection function failure of logic card: change
the controller.
18
LOGIC
FAILURE #2
Logic card
failure 2
Circuit failure of phase voltage feedback hardware on
logic card. Change the controller.
19
LOGIC
FAILURE #1
Logic card
failure 1
The failure produced when the function of low or over
voltage acts. In 24V system, the voltage detected by
controller exceeds 45V or lower than 9V. In 48V system,
the voltage detected by controller exceeds 65V or lower
than 11V. Possible causes:
(1) Check if there is short circuit in the electric circuit
system such as DC-DC and brake coils etc or if the input
power supply contact of controller is good.
(2) If the battery voltage is excessively low or high.
(3) Check B+ and B and see if the power cable on the
wiring terminal of contactor etc is tightly fixed.
(4) If the voltage calibration parameter of controller is in
consistent with actual voltage.
(5) There is circuit fault of overvoltage protection
hardware on logic card, change the controller.
30
VMN LOW
Low VMN
Cause：The high-end voltage of MOS during startup is
66% smaller than the capacitor voltage or this voltage is
smaller than the required value in the operation of motor.
Possible causes:
(1) Wiring of motor is incorrect or there is circuit problem
in motor. Check if three-phase connection of motor is
correct, if there is any leakage of electricity on ground and
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 .
31
VMN HIGH
High VMN
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
37
CONTACTOR
CLOSED
Adhesion of
contactor
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.
38
CONTACTOR
OPEN
Contactor
open
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.
53
STBY I HIGH
High standby
The signal output by current sensor detected by