Crown RC5500:
Shuts off randomly

I have a RC5500 that shuts off randomly gives code 724 and 726. Have checked the circuits all are ok. Access 3 was replaced at an earlier date.not sure what direction to go. Any help would great.
  • Posted 12 May 2021 06:00
  • Discussion started by Tommy_Norris
  • Texas, United States
Tommy Norris
Showing items 1 - 2 of 2 results.
I would check CAN wiring between access 1,3 & 7. also check distribution board for any open circuits, I've had the circuits break where it goes from the circuit board to the black plastic terminals
  • Posted 19 May 2021 00:37
  • Reply by Triggs
  • California, United States
Test battery voltage, be sure that the RC has a strong battery, test voltage while travelling and while lifting. More than a 20% volts drop while running a motor is a red flag, Weak battery.

I would make sure that all the Power Cable that attach to the Access controllers are definitely tight, no loose bolts.

Next, take a good look at the SB 350 of the RC and the battery, be sure that the Power Tips are seated properly within the SB 350's.

Test the Keyswitch for voltage drops and for resistance; lots of techs ignore the age of Keyswitches and Ignition Switches.

Go to the Distribution Board and remove and blow out the K1 Relay. It might be very dirty or the coil might be very weak or have an open winding.

If the RC has more than 3,000 Hours, I would just replace the K1 anyway, that is a lot of hours.
  • Posted 18 May 2021 20:55
  • Reply by LaGrange
  • Missouri, United States
Strong in mind, Strong in Health.

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