Discussion:
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
  • By DTucker
  • joined 11 Jul'14 - 35 messages
  • California, United States
D. Tucker
Showing items 1 - 2 of 2 results.
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
  • By DTucker
  • joined 11 Jul'14 - 35 messages
  • California, United States
D. Tucker
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
  • By Ifixit
  • joined 30 Jan'17 - 174 messages
  • Pennsylvania, United States

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Upcoming industry events …
October 29-31, 2025 - Marina Bay Sands, Singapore
November 26-27, 2025 - Budapest, Hungary
April 8-10, 2026 - Jiangsu Province, China
Upcoming in the editorial calendar
WIRELESS CHARGING
Aug 2025
MANAGING MIXED FLEETS
Oct 2025
Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.
Manitou M50-4
Braeside, Melbourne, Victoria, Australia
Hire
UN Forklift MINI5TON-DIESEL-FORKLIFT
HANGZHOU, Zhejiang, China
New - Sale

PREMIUM business

Noblelift
Global leader and manufacturer of high quality electric, lithium-ion, and IC material handling equipment.
Upcoming in the editorial calendar
WIRELESS CHARGING
Aug 2025
MANAGING MIXED FLEETS
Oct 2025