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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Mechanical Troubleshooting
Brand: Hyster - Model: J40ZT
Number of messages: 5

START MESSAGE:
rob_w
Alberta, Canada
M#  J40zt  S# J160n02587d
Controller, ZAPI  Dualac2&HP

One error code shows up on rare occasions. # 12 Low voltage to steer sensor I think.....

This unit during normal use even at full charge seems to get confused on how to control the operation of each drive motor. While driving straight on motor might decide to stop all together or start turning in a rev. direction as if it was being steered fully in one direction. The back up alarm does go off some times, evvvven though the direction is in FWD.

Steer POT. was replace and the problem did go away for a month or so.

The problem shows up mostly while going up a ramp in the warehouse.

Battery and charger have been fully inspected with no faults found.

Anyone seen this or have any ideas?

Cheers
Rob

Posted 3 Dec 2008 11:51 AM Reply  Report this message
REPLIES: Sort replies by
kevin_k
dumfriesshire, United Kingdom

mack sure the wires to the steer pot are not under pressure when you close the panel lid .they can get hanged up on the power cables when the cover dropps down into position . also how did you setup the steering pot.

Posted 4 Dec 2008 03:51 AM Reply  Report this message
JasonSpencer
Ontario, Canada

I have a quick question to go along with your responce. Could you please explain the proper way to set up and learn the pot when a new one is installed?

Thanks in advance

Modified 6 Dec 2008 03:23 AM
by poster.
Reply  Report this message
mike_n
Alberta, Canada
Have you checked the motor encoder outputs?
They should be able to cause most of those symtoms.

If memory serves, they are 80 count encoders.

Posted 6 Dec 2008 07:43 AM Reply  Report this message
Ehsan_P
Tehran, Iran
Dear Rob,

  Alarm #12 is for EEPROM Config KO.
Each time that you replace or re-install the steering sensor or the chopper (Motor Driver). You have to connect to the drive by console and adjust the steering sensor for it. For Bi-Motor fork lifts, some times it could become damage driver of one side if the steering sensor is not adjusted correctly.
I do not know if you have solved your problem or not. But I think the best solution could be done by having a programming console and check and adjusting every thing step by step. Let me know if you need more info or details.

Best Regards,


-------------------------
Ehsan

e_parvizi@yektafan.com


Posted 22 Dec 2008 02:22 AM Reply  Report this message


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