FU1 fuse blowing - Technical Troubleshooting discussion in Forkliftaction's forums

Crown FC-4000:
FU1 fuse blowing

Hello all, I have a Crown FC-4020- 50 and it keeps blowing the FU1 fuse, sometimes the fuse will last a month and sometimes the fuse will last a few hours. I am hoping someone can point me in the right direction, I have not even started to diagnose the truck, so I am hoping to have a little bit of direction before I start spending a bunch of time on it.
As always thanks in advance, you all are a great help.

Posted 20 Sep 2019 07:06
Discussion started by DTucker
California, United States

D. Tucker

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I don't think that is the case but I will check it. I was thinking more along the lines of contactors getting stuck and causing a direct short.

Posted 25 Sep 2019 02:56
Reply by DTucker
California, United States

D. Tucker

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Check the condition of the battery. High amps in the drive circuit. Maybe the operator is pushing pallets? 36v truck Shouldn't drop below 30v under load.

Posted 24 Sep 2019 13:26
Reply by Ifixit
Pennsylvania, United States

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