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  1. S

    Motor cut off under load and speed

    What are the black and white wires from the LED Display for? What should I connect them to?
  2. S

    Motor cut off under load and speed

    I bought a new LED Display and a new controller. When I connected my new LED Display with my NEW controller, the LED did not power up. See attached photos. To narrow down the problem, I did the following:- 1) I connected my NEW LED Display with my OLD controller, it didn’t powered up too, 2)...
  3. S

    Motor cut off under load and speed

    I checked the Hell wires, they are good, no loose connections. Even when I disconnect the hall wires from the motor to the controller, the motor still works but the problem of motor cutting off and then cutting in still exists. Should I change the controller and see how? PS : I saw on the...
  4. S

    Motor cut off under load and speed

    Besides the 3 phase wires connected from the controller to the motor, there is a bundle of 5 wires, the Hall sensor wires, yes, they are connected. Was it silent prior to a year ago? Not so noticeable prior to 1 year ago. If your display does show current or power, try lifting the back wheel...
  5. S

    Motor cut off under load and speed

    Yes, I'll check it and probably get a new controller. You don't suspect motor problem?
  6. S

    Motor cut off under load and speed

    No, the controller doesn't get warm in almost all riding conditions. The power cut is a sudden one, no slowing down or whatsoever, in any case the power will gradually reduce to zero during when the bicycle reaches about 35 kmh, this is due to the speed limiter, I have no issue with that.
  7. S

    Motor cut off under load and speed

    Now you ask me about the motor, I realise, yes, the motor does give out whizzing sound when it is under load, not particularly loud but noticeable if the road traffic is light, I can hear it. This sound came only in the past 1 year, or thereabout. Could it be motor going to fail? In any case...
  8. S

    Motor cut off under load and speed

    My controller is brainpower, 36V, 250/350W, maximum current is 13A. The combined mass of bicycle and rider is 117 kg. Terrain wise is mainly flat, city riding, with slopes less than 5 degree gradient. Undersized it may seem, but I have been using this controller for over 3 years, it didn't...
  9. S

    Motor cut off under load and speed

    Alright, let me rephrase it. Before I ride, I switch on the battery, and the display turn on (with lights on the display, power indicator etc). As a starts to pedal, the power assist comes in (I only have PAS, no throttle), but after between 5 to 8 secs, the power cut off (it loses power, the...
  10. S

    Motor cut off under load and speed

    Hi E-HP, thank you for your reply. I don't quite get what you mean by "cycling the battery". What I encountered is this. When I start pedalling, the battery will cut in, but after about 5 sec (sometime longer, sometime shorter but it never go beyond 10 sec), the motor will cut off. Then after...
  11. S

    Motor cut off under load and speed

    Hi, finally I bought a brand new battery, 36V, 13Ah, Panasonic cells. However, the same problem exists. The motor will cut off after 5 to 10 sec after cut in, without any apparent reasons. I suspect it is due to too much current being drawn from the battery but I'm not really sure, it cuts off...
  12. S

    Are all LCD display compatible?

    Thanks for the replies. My current LCD was caught in a heavy rain, now it is functioning intermittently, that's why I want to replace it with a cheaper one. Looks like I have to get back the same LCD. Just wonder what will happen if my current model is phased out in future.
  13. S

    Are all LCD display compatible?

    Hi, currently I'm using this LCD as shown in photo 1. I intend to change it to S800 LCD as shown in photo 2. Both have 5 wires of various colours, but they are not connected in the same sequence. I wonder if they are compatible, in other words, can I replace my current LCD with S800 LCD? The...
  14. S

    How should I connect the ignition switch cum voltmeter to the controller?

    Hi E-HP, Just to close the case and let everyone knows, I followed what you said plus reading the instructions. I connected the ignition wire from the ignition cum voltmeter switch to the thin red wire of the controller. I left the purple wire from the controller free, that's, I didn't...
  15. S

    Motor cut off under load and speed

    I am not confident to open up the battery with the warning sign on the battery. I guess I'll just bear with it until I get the most mileage out of the life of the battery and then replace the whole battery. Thanks again for the advice.
  16. S

    Motor cut off under load and speed

    I've tried and connected the battery to the charger for 3 days 2 nights but the outcome is the same. Is there any other things I can do?
  17. S

    Motor cut off under load and speed

    OIC, thanks for the explanation. I'll do it right away and get back to you the outcome.
  18. S

    Motor cut off under load and speed

    Thanks for the advice. Just wondering, the BMS of the battery will stop the charger from charging once the battery is fully charged so what is the use for leaving the charger on for a few days?
  19. S

    Motor cut off under load and speed

    Hi all, I have a new issue with my ebike. The motor power cuts off when it : 1) hits a speed of 36 kmh or 2) it goes up a slight slope, even with speed lower than 36 kmh. From the forums here and without during any test, it seems that it is the battery or rather, the BMS of the battery, cutting...
  20. S

    How should I adjust the parameters of this controller?

    Yes, it is this one! Thank you so much for the very swift reply. Have a nice day. :bigthumb:
  21. S

    How should I adjust the parameters of this controller?

    How do I adjust the parameters of this controller? If someone has already posted in other threads, please direct me to that these too. Thank you in advance. :)
  22. S

    How should I connect the ignition switch cum voltmeter to the controller?

    Hi E-HP, The controller has arrived. When I measure the voltage between the purple and red wire, the red wire is 48V, purple wire 0 V. My battery is 48V. Please explain to me how to connect it. Thank you. I don't dare to connect my ignition switch cum voltmeter to the controller yet as I...
  23. S

    three speed switch problem (no fast speed)

    Wow, that's insightful. I didn't know that back emf can cause as much as 20% speed loss. Thank you.
  24. S

    three speed switch problem (no fast speed)

    Hi, sorry to ride on this thread the 3-speed switches. I'm just wondering, what exactly does the controller do when we switch to high speed? Does it : 1) activate a higher voltage to increase the rpm of the motor? How can it do that, when the MAXIMUM voltage going to the motor is limited by...
  25. S

    How should I connect the ignition switch cum voltmeter to the controller?

    I've not bought the controller yet. :| I'll update you one once I bought and received it.
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