Crown SC4510-50:
No display on power up

Hello,

After changing the battery on this lift, the display no longer lights up on power up. I had engaged the manual parking brake release in order to maneuver the lift for the battery swap. When turning the key there is a short startup alarm for about 1 second (it previously lasted 4-5 seconds if I remember correctly). The parking brake alert works when off the seat. Back up alarm still sounds when putting in reverse. There is no power to anything besides lights and horn - truck doesn't move.

Any help is appreciated

John
  • Posted 19 Dec 2024 06:02
  • Discussion started by john_johnson
  • Florida, United States
miami, florida
Showing items 1 - 4 of 4 results.
Event code -45 on an SC4000 means the traction motor armature did not turn on/receive power.
What is the serial number for the unit?
  • Posted 20 Dec 2024 05:06
  • Reply by DyslexicNerd_01
  • Wisconsin, United States
I was moving wires around looking for anything broken or damaged running along drivers side by brake pedal and now display turns on but I only have hydros. When I apply throttle I get "-45" error. I'll check the manual when I get back.
  • Posted 20 Dec 2024 03:25
  • Reply by john_johnson
  • Florida, United States
miami, florida
I was mistaken -the alarm stays on indefinitely. I don't know if that changes the diagnosis or not.
  • Posted 19 Dec 2024 06:32
  • Reply by john_johnson
  • Florida, United States
miami, florida
I would try to replace the k1 relay on the distribution board. My guess is the beep stops when you release the key from the start position. This still allows all the lights and alarms to work, but keeps the access 1 off disabling all functions.
  • Posted 19 Dec 2024 06:09
  • Reply by DyslexicNerd_01
  • Wisconsin, United States

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