HELI G Series Operation & Service Manual page 102

CONTACTOR
37
CLOSED
CONTACTOR
38
OPEN
53 STBY I HIGH
CAPACITOR
60
CHARGE
alternately, and expect phase
voltage can be equated to the
cathode voltage, if one phase
voltage is higher than 10% of the
nominal battery voltage (80 v
system, rated voltage of 80 v),
the failure will occur;
Case 2: this fault may occur
when the startup has
self-diagnosed successfully and
the main contactor coil is closed.
In this case, the phase voltage is
expected to be less than half the
value of the battery voltage, and
if one phase is above this value, a
fault will occur.
Before driving the main
contactor coil, the controller will
check whether the main
contactor is adherent. The
controller will drive the power
bridge for tens of milliseconds to
try to discharge the capacitor
group. If the voltage of the
capacitor group does not reduce
the voltage of the key port by
20%, this fault will occur.
The controller drives the main
contactor coil, but the contactor
contacts do not appear to be
engaged. To detect this, the
controller plugs a DC current
into the motor and checks the
voltage of the power capacitor. If
the power capacitor is
discharged, the main contactor
coil is disconnected
When standby, the current sensor
detects that the current is not
zero
The controller capacitor charging
system is involved. When the key
switch is closed, the controller
tries to charge the power
capacitor and check whether the
capacitor is fully charged within
the specified time. If the
99
resistance);
(2) whether the motor wire is
well connected;
(3) if there is no external
problem and the motor wire is
well connected, the problem
may appear inside the
controller, it is recommended to
replace the controller;
Case 2 solution:
(1) check whether the motor
wire is well connected;
(2) check whether the contact
of the main contactor is in good
condition;
(3) if there is no external
problem and the motor wire is
well connected, the problem
may appear inside the
controller. It is recommended
to replace the controller
Check the contact of the main
contactor. It is recommended to
replace the main contactor
1. The main contactor contact
is not working, it is
recommended to replace the
contactor;
2. If there is no problem with
the contactor, it is suggested to
contact the controller
manufacturer
The current sensor or current
feedback loop is damaged. It is
recommended to replace the
controller
1. Check whether there is an
external load (such as the
headlamp) connected in
parallel with the charging
capacitor, thus causing the
current of the charging
capacitor to be pulled down;