EZKontrol ESC beeping 6 times on startup

[Phrogz]

I bought a 72V 5kW BLDC Motor with a 400A 72V EZkontrol controller. Finally got it hooked up to batteries (and power switch, and accelerator potentiometer) this weekend. When switched on, I get a light and 6 beeps from the controller. I can connect to the controller via Bluetooth and the iOS app, but I don't see the majority of the settings described in the manual.

I've found online (I think) that 6 beeps means mosfet protection. What does this mean? What is it being protected from? How do I debug this and fix it? Have I missed some critical wiring? The batteries are supplying ~80V, but the specs say the controller should top out at 95V, so that shouldn't be the issue.

Additionally, is there another app that, for example, does the learning mode described in the documentation?

I have a short video of the setup and behavior here: https://youtu.be/Orf2QBU2NOA

Not shown in the video: we tried twisting the accelerator potentiometer to see if maybe the motor would turn despite the error; it did not.

[Campbell3d]

From what I can tell 6 beeps from the manual is for motor overheating, but since your motor isn't running, you might need to lower the max phase current.

You are currently not using the EZkontrol tuning app, what you have is just the version for monitoring speed.

For android, download https://www.goldenmotor.com/apps/EZ-Tune.apk

Haven't done it, but for apple I believe you have to download from wechat. Check their video for download instructions. https://www.youtube.com/watch?v=BOG8MIpbnWI

Once you install the app, then you can adjust parameters like the max phase current. Also check your battery settings to make sure you are within range of the overvoltage protection. Since your motor is also a golden motor, in theory, you do not need to self learn. But if you continue to have issues, the self learn button is in the application. When you first hit the button, be sure to follow the on screen instructions and give it time.

[Bikemad]

Hi andto the forum.

6 beeps would definitely indicate a MOSFET protection error if it was the older style GM VEC controller, but your controller is the newer EZ-kontrol type. 

According to the EZkontrol Users Manual the 6 beeps indicate a "Motor Overtemperature" error.
As your video also shows an indicated motor temperature of 300°C, I'm guessing there may be a problem with either the Motor's temperature sensor or its wiring.

Unfortunately, I have no experience with the EZkontrollers or their programming software/Apps so I don't know if it's possible to temporarily disable the motor temperature protection to enable the motor to be quickly tested before locating the cause of the excessively high temperature reading.

Double check the temperature sensor wiring from the motor (the Black and White wires on the Hall Sensor connector).
According to the data sheet for the KTY84-130 temperature sensor it should have a resistance of between 970 and 1030 Ohms at 100°C (measured between the black and white wires on the motor with the Hall connector disconnected.)
I would expect the resistance to be lower than 600 Ohms (if your motor temperature is also at the same 6°C that's showing for the controller temperature) if the motor temperature sensor is working correctly.


                         Temperature (°C)

Hopefully it will be something very simple like a loose connection.



Alan
 
EDIT: Temperature/Resistance Curve Added