Its called PMT (Pulse Monitor Trip) your #1 Rec is turning on but not off. Most of the time it is either the #2 or #5 Rec that is bad. Well as long as none of the wiring or the connector to back of the card is messed up. If you arn't sure which ones I am talking about I can send you a picture. They should cost you under $50 each and they are next to each other sometimes it is prudent to just change both out. When doing so you want to unplug the battery and there is a large capicator on the panel you want to short the 2 terminals on it out with a wrench or screw driver before messing with it. The #2 and #5 look the same, a black block about 1" x 1-1/2" with 2 screws and push on tab
The part numbers are #2 Hyster 368919, #5 Hyster 368918
I have a picture of them but I don't know how to send it on here.
They cause 90% of the #1 not turning off which is your problem