Crown RC5500:
Error Code 756

I keep getting the error code 756 and cannot find what it is for the life of me. Anyone able to help?
Thanks in advance!
  • Posted 2 Apr 2019 16:32
  • Discussion started by damjan_m
  • British Columbia, Canada
Damjan
Showing items 1 - 5 of 5 results.
go figure it's the left motor....
thanks for response..
  • Posted 16 Jun 2019 06:13
  • Reply by werthy1
  • Ohio, United States
Bad encoder on the drive motor if it is spinning the right speed. Most of the time it's the motor itself that needs replacing. The motors encoder is not reading right ( low RPM) or is reading right if the lift motor barely moves, so the controller is putting more voltage to it thus the higher amps. The RH motor can be changed without removing the mast unless you have a quad mast then it must come off.
  • Posted 16 Jun 2019 02:26
  • Modified 16 Jun 2019 02:29 by poster
  • Reply by Zerk
  • Arkansas, United States
I have the same code and am wondering if there is a definitive test to determine if its the drive motor or the drive unit.... going through analyzer I read the ECR1 as 3558 RPM ECR2 as 265 RPM, and M1 amps are 44, and M2 amps are 334 after 10 seconds of run time with (wheels off ground and steer wheels straight).
  • Posted 15 Jun 2019 09:06
  • Reply by werthy1
  • Ohio, United States
Hey JCM1!

Thanks so much for that info - it definitely helped, and was able to have the code disappear and then proceeded to recalibrate the handle successfully. The interesting thing is now the unit doesn't really move forward or backwards at all.. almost as if it's not getting enough juice, but checking with my voltameter it is showing consistently ~37.. I have the service guy coming in the A.M. but was hoping that I was able to figure it out myself.
If you have any other suggestions, shoot! If not, it's ok - I appreciate your help thus far and will give an update once all is well!

Cheers!
  • Posted 3 Apr 2019 15:52
  • Reply by damjan_m
  • British Columbia, Canada
I have gotten this code before when the drive unit is going bad and beginning to slip. In the features menu check F 27 and set to disable and see if the code goes away. That detects slip between the drives. I've usually had to replace the sub-assembly after this code pops up. Good luck
  • Posted 3 Apr 2019 00:34
  • Reply by JMC1
  • Iowa, United States

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Featured Business
NC Nielsen
Leading forklift dealer in Denmark of both new and second hand forklift trucks and terminal tractors.
Machinery-onQ Listings
Komatsu FD30T14
  • KomatsuFD30T14
  • 2000 | Used - Sale
  • Netherlands
  • EUR 5,750
Linde H30D01
  • LindeH30D01
  • 2011 | Used - Sale
  • Netherlands
  • EUR 8,500
Mitsubishi FD35A
  • MitsubishiFD35A
  • 1998 | Used - Sale
  • Netherlands
  • EUR 5,250
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2007 | Used - Sale
  • Japan
Nissan FGJ02A30U
  • NissanFGJ02A30U
  • 1998 | Used - Sale
  • Netherlands
  • EUR 4,750
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2006 | Used - Sale
  • Japan
Toyota 02-5FD35
  • Toyota02-5FD35
  • 1994 | Used - Sale
  • Netherlands
  • EUR 6,750
TCM FD40Z2
  • TCMFD40Z2
  • 1981 | Used - Sale
  • Netherlands
  • EUR 4,750
Denka DL21
  • DenkaDL21
  • 2008 | Used - Sale
  • Netherlands
  • EUR 16,500
Grove MZ82C
  • GroveMZ82C
  • 1998 | Used - Sale
  • Netherlands
  • EUR 12,750
Featured Business
Tarching Nippon (M) Sdn Bhd
Importer and exporter with over 30 years vast experience in the industry.
Machinery-onQ Listings
TCM FD40Z2
  • TCMFD40Z2
  • 1981 | Used - Sale
  • Netherlands
  • EUR 4,750
Komatsu FD30T14
  • KomatsuFD30T14
  • 2000 | Used - Sale
  • Netherlands
  • EUR 5,750
Linde H30D01
  • LindeH30D01
  • 2011 | Used - Sale
  • Netherlands
  • EUR 8,500
Toyota 02-5FD35
  • Toyota02-5FD35
  • 1994 | Used - Sale
  • Netherlands
  • EUR 6,750
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2006 | Used - Sale
  • Japan
Mitsubishi FD35A
  • MitsubishiFD35A
  • 1998 | Used - Sale
  • Netherlands
  • EUR 5,250
Nissan FGJ02A30U
  • NissanFGJ02A30U
  • 1998 | Used - Sale
  • Netherlands
  • EUR 4,750
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2007 | Used - Sale
  • Japan
Denka DL21
  • DenkaDL21
  • 2008 | Used - Sale
  • Netherlands
  • EUR 16,500
Grove MZ82C
  • GroveMZ82C
  • 1998 | Used - Sale
  • Netherlands
  • EUR 12,750