HELI CQD16X1, Operation & Service Manual

Page: 76 / 105

72
- Check the connection between the power cable
and battery positive and negative pole and the
connection between the main contactor and
controller’s -BATT
、
+BATT. Connect with screw
and the tighten torque is 13Nm÷15Nm.
- If pressure drop is not detected on electric supply
circuit, fault will occurs each time when the key
switch is on. Fault may occur on controller
hardware, change the controller.
2
233
POWER MOS
SHORTED
Power MOS
short circuit
Before the main contactor is closed, the software will
check the electric bridge and convert it to MOS lower
end power and the phase voltage is reduced to -BATT
（
increase to +BATT
） ，
if the change of phase voltage
disagrees with instruct, fault occurs and change the
controller.
2
235
HANDBRAKE Hand brake
switch fault
When travelling request is sent out, hand brake input
signal is valid.
The possible causes are:
Damage of hand brake switch or wiring is incorrect;
The hand brake switch is all right. In TESTER menu,
the hand brake is ON all the time, change the controller.
2
236
CURRENT GAIN Current gain
fault
The max. current gain parameter is factory setting
value. It means the max, current adjusting parameter
program is not yet operated.
Remedy: HELI technician set the correct program on
current gain parameter.
2
237
ANALOG INPUT Analog signal
input fault
When A/D input by all analog signal is converted into a
fixed value, the fault occurs. Delayed time exceeds
400 millisecond. The fault is used to detect A/D
converter fault or analog signal conversion.
Fault analysis: if fault exists all the time, change the
controller.
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238
WRONG
ZERO VOLTAGE
Zero voltage
fault
VAM high terminal voltage feedback voltage is very
higher or lower than 2.5V, that means the controller
circuit is broken.
Check the following items:
Motor inner side connection
Motor power cable connection
Drain current between motor and truck external case
If motor is well connected, the interior of the controller
has fault, change the controller.
2
239
SAFETY
OUTPUT
Safety output
fault
Safety output drive short circuit
Check if there is short circuit between A19 and –BATT
or low impedance discourages output. Logic card