H motors not starting

[h-elsner]

If is not updated to latest firmware can cause the motors not starting?

No.
If you can't start motors when GPS is switched off then you are one of the unlucky guys then have the well known problem with flight controller. The IMU runs out of BIAS and cannot calibrated anymore. Thus the pre-flight check fails and motors will not start.
The four main symptoms for this case are:

1. GPS status stuck in “Acquiring”. The drone cannot be armed anymore.
2. Motors will also not start when GPS was switched off. This unusual behavior can be used as quick test to identify the fault.
3. Altitude on ST16 shows some meters below zero and did not initialize. The pressure sensor’s height estimate is OK, near zero at this time.
4. The “Yaw” output in the GUI is slowly rotating while sensor values from accelerometer and gyroscope are also plausible and do not change constantly in one direction as Yaw is doing.

Solution:

• In rare cases GPS lock came after very long time (~4h) and faster at next try.
• Sometimes it helps to downgrade the flight controller firmware. Not in all cases an upgrade to latest firmware is successful after that, but sometimes this is possible.
• The ultimate solution is to replace the flight controller module (MCU-board).

Proper accelerometer and compass calibration is always needed before and during trouble shooting.

br HE

 

[sr.loucaorf]

No.
If you can't start motors when GPS is switched off then you are one of the unlucky guys then have the well known problem with flight controller. The IMU runs out of BIAS and cannot calibrated anymore. Thus the pre-flight check fails and motors will not start.
The four main symptoms for this case are:

1. GPS status stuck in “Acquiring”. The drone cannot be armed anymore.
2. Motors will also not start when GPS was switched off. This unusual behavior can be used as quick test to identify the fault.
3. Altitude on ST16 shows some meters below zero and did not initialize. The pressure sensor’s height estimate is OK, near zero at this time.
4. The “Yaw” output in the GUI is slowly rotating while sensor values from accelerometer and gyroscope are also plausible and do not change constantly in one direction as Yaw is doing.

Solution:

• In rare cases GPS lock came after very long time (~4h) and faster at next try.
• Sometimes it helps to downgrade the flight controller firmware. Not in all cases an upgrade to latest firmware is successful after that, but sometimes this is possible.
• The ultimate solution is to replace the flight controller module (MCU-board).

Proper accelerometer and compass calibration is always needed before and during trouble shooting.

br HE

Thanks for the fast reply .
Where I can buy Mcu-board?

 

[h-elsner]

Where are located? Best address is John: https://yuneecskins.com

br HE

 

[sr.loucaorf]

Where are located? Best address is John: https://yuneecskins.com

br HE

Iam from Cyprus...

 

[Pier2162]

I suggest also to check hardware monitor onto the ST16 to be sure that position of throttle stick is at zero when released.
Motors should not start if throttle is out of zero.