I have an electric AC truck serial is e12029.
It has 2 Danahar AC motion controllers fro traction and lift.
Truck drives ok when i pull the lift levers it throws up error code E0 and the truck judders as if the motor is trying to turn but cannot, however you can see the lift juddering and forks moving up very slowly.
Battery is ok, there are no earth leakages that i can pick up on the motor cables or the battery.
What i have found is that the connection to the motors the 3 motor cables are full of corrosion and rust, but cannot get to it as the back of the truck need to come off for me to get to the pump motor.
Now i have dropped a clamp meter on the motor cables and there is no current draw, even though the motor shakes the whole truck there is absolutely no current draw.
is this likely to be another encoder related issue??
Showing items 21 - 35 of 35 results.
Hi martins.
We have gone through all the different procedures. We know its not a motor issue because we transfered the cables lightwiring everything across with the traction motor and the the fault still persisted.
We know its not the main power board as we swapped it around with the traction.
We know its not the main PCb as we tried it on another truck and works and the one off the other trucks does not work on this truck.
We swapped the encoders twice, and even when we swapped it with the traction side the fault remained.
At this moment we are thinking something to do with the valve block as everything else seems ok, even the motor connected to the pump can be rotated so we dont think the pump is seized either.
The mechanical engineer is going to check the valve block next.
hello my friend
check transistors and other sinals. becouse you have the same voltage the battery in U V W in the motor in any position with AC multimeter. is possible change the cables in the motor, the motor invert rotation.
well see the other components, the current sensors, transistors,board control gates. well sorry my opinion, but when we not have any information about machine...!!! anything goes
Hi Mate
Tried the updated settings and still no different. let me know if your toyota contacts come back with anything on this, would be greatly appreciated.
Ill ask around my fellow BT / Toyota colleagues & see if any of them have come across this issue.
Hi Mate
Yes we changed the main AC controllers around.
We tried a different Main PCB.
We tried another encoder.
We tried swapping the motor.
Running out of ideas but will check the settings again with the info you have emailed.
E0 = Material handling main circuit error, its the main controller that triggers this code.
Sent you an email with the service book update that contains this new error code & also some troubleshooting info.
Hi again
Still having problems with this workshop toyota. We had another truck in so tried the card on the other truck and the card works ok...now we dont know what other tests we can do still truck hydraulics slow and error EO.
Hi Powerlifter
email me will pass on the details to you as i have passed it on into the trade. They are due to advertise it next week, if you are interested you can arrange something with them.
Hey Montaz you still got that four wheel steer for sale?
Hi again
Ok today checked motors and wired the traction motors for pump controller circuit and the fault transfered to traction motor.
So that eliminates the pump motor.
The only thing left now is the logic card, unless someone has one final test?
You may be right as i recall a few months ago on a jungheinrich ac traction motor rotating very slowly and juddering the truck. Jungheinrich tech reported it to be an encoder fault but it was not, so when i went in put the clamp meter on windings and it was drawing excessive current even though motor was hardly turning.
Motor winding was down. Going to check monday morning and will update.
Thanks once again
could be a stator winding problem. continuity should be exactly the same between any of the three terminals. without a megger its the only test i know of. maybe someone else knows a better way.
Can anyone shed some light on this truck problem i am having.
We replaced the encoder sensor and the problem still persists. We then changed the pump controller with the traction controller and still no difference.
At this stage I was clutching at straws and swapped the ac pump motor outside 2 windings around, still no difference.
I have exactly the same problem with a AC hyster J2.00xm the only difference being originally the hyster threw up an error code stating it was an encoder fault, after replacing the encoder the fault no longer appears but pump is very slow.
Any advice would be appreciated, perhaps its something to do with the new encoders?
Thank You will look at again tuesday possibly and try change unit just to eliminate or confirm unit.
yes, it's likely to be an encoder problem but can be a controller problem. on many of those units the danaher controllers are interchangeable between pump and drive
Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.
If you are having trouble using the Discussion Forums, please contact us for help.