It is a Yale truck, 38VDC. I doubled checked the accelerator pot and it is all good. Linkages are good, condition is good, pin located good and the travel is good.
I also tried aKevin_K's suggestion of adjusting it so that the voltage was below 3.6VDC at start and it gave the same error code 07. I also tried it at 0.1VDC increments down all the way to 1.5VDC but still error code 07.
I have checked the wiring right through and it is all good. I suspect a faulty controller. When I decided to open up the controller and found that it has water droplets on the inside of the casing and looks like the boards have been water damaged. I have found a company in the US which repair these for only $275 but I have since been told that we are getting a new folklift so I won't be spending any more time on the broken Yale one.
Thanks again for your help
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