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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Lifting machines
Discussion:  Linde H30D Error Codes
Number of messages: 8

Texas, United States
I have a 2007 Linde H30D that Im having issues with.  When I purchased the unit is was giving an error code of T231-T244. The unit starts and runs perfectly, the mast goes up and down but with the error code is displayed the foot controls will not work to make the machine drive forward or backwards.  I started and stopped the unit several times and finally the code didn’t display and it functioned correctly.  The guy I purchased it from said this happens intermittently so it will work sometimes and others it wont when the code is displayed.  I took it to a Linde dealer to have the issue resolved and we replaced the potentiometer switch for the pedals but that did not fix the issues.  Now they are telling me one of the computers is not original to the machine so they are not able to do diagnostics correctly.  They thought they could get a pass code from Linde to allow them to reprogram the computer to make all the VIN numbers match but are now saying Linde will not allow that and it will cost $2,400 for a new computer.  Any suggestions before I'm forced to buy the new computer??

Thank you!

Posted 28 Jun 2018 04:28 AM Reply  Report this message
REPLIES: Sort replies by
OR, Italy
Error 231 Traction
The control unit has recognized that the sum of the voltages (N1: 49, N1: 32) of the accelerator potentiometer (1B2) supplied by the working potentiometer and the control potentiometer gives an inadmissible value.

Effects on the cart:

Possible causes:
1. Defective throttle potentiometer (1B2).
2. Connections between the accelerator potentiometer (1B2) and control unit (N1: 1, N1: 32, N1: 49, N1: 61) defective.

Error 244 Traction
The control unit has recognized that without internal control the internal safety relay is closed.

Effects on the cart:

Possible causes:
1. Voltage peaks or drops in the voltage supply.
2. Defective control unit.

Posted 28 Jun 2018 05:51 AM Reply  Report this message
Auckalnd, New Zealand

Dont be mislead by what they are telling you.
What controller are they saying is not original?
If they changed the potentiometer and the fault is still there I would get them to check the gear arrangement in the pedals
Get them to do a continuity check on the 4 wires from the potentiometer to the controller.
If all is good then I would suspect the controller but highly unlikely.

Posted 28 Jun 2018 07:25 PM Reply  Report this message
Texas, United States
Thank you for the advise.  I'll have them check the gear arrangement and check continuity.  They said its the hydraulic controller, the one right under the seat beside the VW engine controller.  its towards the outside of the machine.

Posted 29 Jun 2018 04:00 AM Reply  Report this message

They must change the 3 plastic gears when installing a new potentiometer. The absolute slightest amount of play in them will create this problem.


Posted 29 Jun 2018 09:43 PM Reply  Report this message
Texas, United States
My Linde dealer came back saying this:

"The question we posed to KION/Linde was “is it was possible to swap the controllers between 393-01 trucks (H2X393R00879 & H2X393P01407).” Unfortunately, they are telling us that is not possible.

Now, the code T244 is referencing the safety relay. This relays is an internal component that is welded inside the controller (LHC), see below. So, if this relay fails then you have to replace the whole controller – this is where we are currently at."

I have a picture but the site wont let me post it...

Is it possible to solder a new relay on the board to keep from buying a replacement for $2,400?

Modified 4 Jul 2018 06:36 AM
by poster.
Reply  Report this message
Auckalnd, New Zealand
There are 2 safety relays in the controller
I'm sure you could get it fixed somewhere.
I'm also sure that you can use the controller from the the other machine you mentioned.
Nothing to lose I'm 99% sure it will work for you.

Posted 4 Jul 2018 05:47 PM Reply  Report this message
West Yorkshire, United Kingdom
I would be very suprised if controller isnt interchangable
Can you post part number of both? (390360-.-.-.-) we can then look at supersesion order
Did linde dealer plug into truck? Usually when safety relay goes down you get high error number in memory >400
While they had laptop on forklift did you notice if it showed asterixes where serial nimber should be?
I have had good success with TVH repairs on these controllers, usually in region of uk £400

Modified 5 Jul 2018 06:02 AM
by poster.
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