Saturday, 28 June 2014

Check treadmill LED controller status PF905 PF906 LIEO | Support for York, Technofit, Raleigh Power Runner, Trimmaster, Trimline

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How to analyse electronic problems in treadmills


1. Verify if the controller is faulty:
a. when the treadmill only works for a while or is not working at all, first of all check the status of the green LED on the controller. If the green LED continues to blink, it means that the controller must be replaced with a new one;

b. if the green LED stays off all the time, it means that the controller has no problem and is working properly. At this point you should check that the computer and all the wiring are all ok, in particular that the wiring is not broken. Where necessary, cross-checking with a new computer and wiring.

Restart the treadmill every time you run a test. You should also check the speed sensor and replace if necessary.


2. Treadmill board LED meanings

LED1 (green LED)

1. The code:
a. 1 flash ... reading the trigger
b. 3 flashes ... the power KO, replace the card
c. 4 flashes ... current overload, turn off and on again
d. 5 flashes ... overload of motor voltage
and. 6 flashes ... successful software installation
f. 8 flashes ... the motor voltage is lower than the expected value after giving the start command

2. Overload Indicator: This green LED lights when the current is above the set value during operation. If the overload continues for 3 ~ 5 seconds, the treadmill will turn off and the green LED flashes 4 times. Turn the treadmill off and on again.



LED2 (red LED)
Speed ​​Indicator: This red LED lights when you change the value of the speed of travel (either increasing or decreasing) and turns off when it reaches the desired value. 

LED3 (red LED)
Tilt Indicator: This red LED lights when you operate the incline on the treadmill (both
upward and downward) and turns off when it reaches the desired value.



Buy at below links quality and convenient treadmill controllers and motors
  1. Treadmill controller 220 to 240 VAC input (Europe / Asia / Australia)
  2. Treadmill controllers 110-120 VAC input (North America) 
  3. Treadmill motor 


35 comments:

  1. I am repairing treadmills since 4 years and till now I had collected like 40 of those boards with the same exact problem
    3 flashes and relay opening after 3.2.1 go
    I figure it out that from one of the pins of the PIC controller is not getting out 5V to trigger a transistor for 12V to open the relay
    is it the PIC broken or something else is causing the issue and the board just stay in a secure mode or something like that
    maybe the IGBT burn away and it reads it ????
    not support from ENDEX at all
    I try to contact them many times without success
    Thank you for any comments

    ReplyDelete
    Replies
    1. Hi Honey,

      if it's a PF controller as in the picture I confirm it's likely to be IGBT broken.
      By the way PF is an ENDEX compatible controller. But I think Endex controllers are far better than the PF/LIEO controllers.
      Where are you located? I'm looking for electronic repairs around. Write me at tec@partsfortreadmill.com

      Delete
    2. you must check 390 kohm resistor which is used to check on the capacitor (big one) voltage.

      B.Buyukguzel

      Delete
  2. hi sir i have a pf-906 trade mill board i replace the main transistor 2 times but it keep burning ever time(sgw30n60)...  is there another something to replace... before start the green led light  keeps blink 3 times and after start it keeps blinking 8 times.. plz hope u reply soon?

    ReplyDelete
  3. Please check the motor. If the motor has some electrick leaks, it depends on the motor.
    You can also test the controller with a 220V bulbe to be connected to m- and m+ terminals instead of the motor.
    Other tipp is to check capacitors, if it leaks, may bring problems to transistors.

    ReplyDelete
  4. hi sir i replaced the transistor and the big capacitor and i connect the connectors and gave power but did not run it and i check the green light it blinks 3 times it means the power ko. replace the card what it means ? i cannot understand sir? plz can u explain it to me?

    ReplyDelete
  5. I have a treadmill with pf905 controller, it's working, when reached 6miniutes it's off automatically and indicated e - 1

    ReplyDelete
  6. Hi Mohamed,

    make the following test. Test treadmill with NOBODY on it at speed 8 km/h,
    if it stops, it's a controller fault.

    if it works, but it stops when somebody on treadmill, it's MOTOR fault or problem with running belt (too old, no lubrification)

    ReplyDelete
    Replies
    1. Thank you, very much sir, I solve the problem, with ur advice, and thanks again, good job,

      Delete
    2. I got another fault of my pf905 controller, it's not running smoothly, it's getting stuck, and if I put speed 9/8 it's working, if put low speed 3/4 it's not run, I replace the controller than working properly, cn u tell me how cn I repair the controller. Pls explain

      Delete
  7. Sorry this is very difficult to repair on PF905. The problem may be in the current limit, but old models of PF905 don't have the trimmer to regulate the limit. Usually we don't repair those moldels.

    ReplyDelete
  8. Hello! Does anyone know where I can find a schematic for a pf906 board? I need to replace a small diode but can't read the details of the old as its burnt.
    Thanks!

    ReplyDelete
  9. Hi all. Anyone have a schematic for the PF906 board? I need to repair one. Thanks!!!

    ReplyDelete
  10. sorry we don't have the schematics, according to my experience is better to replace the old PF906 (and also 901-902 and 905) with the new ones because repair is time consuming and most of the times is not reliable because:
    1) the old versions of PF don't have a trimmer to set the torque
    2) they used a poor quality glue which becomes conductive over time and this brings to random faults.

    ReplyDelete
  11. Thanks for the advice. Is there a way to tell if a to-be purchased board is a 'new one'? Here in Italy they are asking €225 So, if I'm going to have to pay that much I'd like to know I'm getting a newer one.

    ReplyDelete
  12. Hi Bryan, new ones have the trimmer for regulation, here you can buy the new pf906 but I'm not sure if they still have in stock
    http://ricambitapisroulant.salesource.it/power-first-pf906.html

    ReplyDelete
    Replies
    1. I'll go for it. Hopefully they have it in stock. Thanks again!

      Delete
    2. My treadmill has an optical speed sensor. Will the new board support it? I read somewhere that there are some with magnetic sensors?

      Delete
  13. Hi the controllers PF have two connectors one for magnetic and one for optic sensor. You'll use the optic and forget about the magnetic.

    ReplyDelete
  14. Hello
    I have with my PF905 also the problem that the board after ca 10sec starts 3x flashing. It is the new ohne with the trimmer.
    The following parts I have already exchanged.
    - IGBT,
    - main transistor,
    - the Elkos (4x 470yF + 2x 47yF + 1x1yF).

    The two large 400V Elkos and the ceramic capacitors I have not yet exchanged. Could it be due to these parts?

    The motor runs with 12V / 3A power supply! Can the board actually be tested in the removed state with 230V supply?
    Thank you very much

    ReplyDelete
  15. Hello
    I have with my PF905 also the problem that the board after ca 10sec starts 3x flashing. Its the new ohne with the trimmer.

    The following parts I have already exchanged:
    - IGBT,
    - main transistor,
    - the Elkos (4x 470yF + 2x 47yF + 1x1yF).

    The two large 400V Elkos and the ceramic capacitors I have not yet exchanged. Could it be due to these parts?

    The motor runs with 12V / 3A power supply!
    Can the board actually be tested in the removed state with 230V supply?
    Thank you very much

    ReplyDelete
  16. How are you testing the controller? With the original motor?
    I'd suggest to connect a bulb (220V incandescence) to the M- / M+, if the controller is repaired you should be able to light up with start and increase light with speed +.
    I don't think you can solve the problem by replacing the capacitors.

    In my opinion if it starts and after 10 seconds LED light, the most likely is that you have a short circuit in the motor. If you test the controller with the bulb you can make sure about this.

    ReplyDelete
  17. I am tested the Controller with the Original motor and with a 220V blub.
    But in both situations there is no voltage on M+ M-, when i pressed start or speed+

    When i turned on the main switch and nothing else (dont press the Start-Button ) the Controller also starts flashing after 10sec.

    ReplyDelete
    Replies
    1. Ok, so power to m+/m-. If you don't hear the relay clicking when you press start, it may be a cable or display problem.
      If you hear the click (power relay), maybe the controller chip is faulty. If the chip is faulty, it's better to replace controller.

      Delete
    2. Thank you for your quick answers and your help

      I checked the controller again today.
      When I press the Start button, I can't hear a click from the relay.
      The red LED (LED2) on the board lights up briefly (LED2) when I press the start button.
      So I check again tomorrow all cables and the display for possible damage.
      However, I do not quite know that the board always flashes 3x when i switched on (after 10 seconds) without a start command.
      Checks the main board when switched "power on" the function of the diplay board ??
      Unfortunately, I am a bit desperate, because I am now no longer sure whether a new board would solve my problem at all.

      I hope that tomorrow I can find a fault on the cables or display.
      Thank you very much

      Delete
  18. Hi there, I am working with a PF-906-06 PCB as in the link you showed: http://ricambitapisroulant.salesource.it/power-first-pf906.html

    However without the small PCB placed over U6.

    The fault is that the treadmill doesn't power up at all, no LED's flashing on this PCB and none of the Treadmill controls powering up. The two fuses in place on this PCB are fine. The only noticeable power on the treadmill is that the incline adjustment assembly sometimes makes an arcing sound (like a transformer with broken windings) when the treadmill has been off for a number of days, this sound will stop after around 30 seconds - 1 minute.
    I noticed that RLA2 has low resistance across the open switch (46.8kOhm), and D4 is short circuit (when in circuit).
    Would it be safe to say that this PCB is the source of the power issue on the treadmill? I'm 95% sure this is the case.
    Any information would be gratefully received!

    ReplyDelete
    Replies
    1. dear Pierce, I'd double check the small transformer on the controller, connected at TJ1 / TJ2.
      Unfortunately the old versions of the PF controllers (the ones without the trimmer on the U6) are not very reliable. Labs which work with us usually replace them at all without trying to repair, because often they require too much time.

      Delete
  19. >1M ohm Resistance across the open gate, I applied 30V 2.5A across the coil and my probe sparked on contact, I then went on to check the resistance of the coil and found it to be 0.5 Ohm.
    It would make sense now that it has been pointed out. The incline adjustment for the treadmill draws power through this relay, which would explain the buzzing sound. I may perhaps try changing this relay before ordering a new PCB, as, if this excessive power draw is lost, perhaps the power will return to the rest of the treadmill.
    Many thanks for your support, again, I appreciate any further information you may be able to give.

    ReplyDelete
  20. hi, i have a pf 905 controller, its working fine, but after 5 - 10 Min automatically power off. no display.

    ReplyDelete
    Replies
    1. try with nobody on the treadmill and max speed. Does it stop?

      Delete
  21. Hay, I have a treadmill and it was partially repaired. Now one connector is remaining without any connector. The machine is not powering up. How to solve this issue.

    ReplyDelete
    Replies
    1. Please send the picture of the cabling to aftersales@partsfortreadmill.com so that they can help you understand what the problem is.

      Delete
  22. My trendmil stop when it reached about 12mins and smell burn.the motor is fine not hot but the transformer is hot 110v

    ReplyDelete
  23. If the belt is more than 4 years old, you should replace the running belt with a low friction one.
    This problem happens because there is too much friction between running belt and running deck.
    All belts here are low friction belts: http://www.partsfortreadmill.com/index.php/parts-for-treadmill/belt-for-treadmill/

    ReplyDelete