Thanks for your replies. We have followed Lifters advice and all is well at the moment. We will take extra care with the batteries in the future.

It's interesting though , that Nissan will not issue any information with regard to this card. They seemed to now about the problem when we explained what had happened and said the only solution was to buy a new card at a cost of £2500.

It seems Nissan believe they can make a lot of money from your own mistakes.

Thanks again for all your help.

I agree with Lifter.
We too have found these systems poor.

I presume the model is a CWP02 we have a few of these on hire and have had the same problem. We have tried repairing the boards and aftermarket transistors but usually not successfully. We believe the main cause is when the battery gets low and the truck is held on lock or hits something it spikes the transistor which then blows the board. Fit a curtis guage to the machine to enusure hydraulic cut out when the battery charge is low the guage on the truck is not all that reliable. Fit the 100amp transistors the latest ones if the originals were the 75amp type.

If you have only had the unit for 18 months (I'm guessing as this is the only time reference you give) and based on you being a small company you have low hours then you need to chase up Nissan.

Manufacturers as far as possible build in safety systems to protect the various circuits, but this can sometimes either be overlooked, not upto the job, or simply not possible, economically or design wise.

Having said the above sometimes there are some issues which occur which can be related to the application, but I am not sure yours is one of them by the sounds of it.

If your machine is only 18 months old and the hours are reasonable then I would suggest pushing the agent who sold the unit harder for either complete or partial cost recovery of a new part. If you still have no sucess, and you are only dealing with a Distributor or even lower on the chain a sub-dealer it could be worth contacting Nissan themselves. You can find a UK contact name on the Nissan Forklift Europe website under Distributors......just an idea.