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MDR 710 Card LED Diagnostic information 
Skill required to complete this article: Case Conveyor ~ MDR and level is Beginner.


 MDR 710 Card LED Diagnostic information 



 MDR  710 Control card



The control card has a blinking LED to indicate status.

The LED turns OFF for 0.5 seconds for every blink. Each blink is separated by the LED turning ON for 0.5 seconds. Count the number of times the LED turns OFF to determine the error code.

The table below defines the meaning of each error code. If there are multiple errors, the error codes will appear in the order they occurred, separated by the LED turning ON for 3 seconds.

For example, the following would indicate a Photo-eye Error occurred, followed by a Roller Thermal Fault error.

Each BLINK is OFF for 0.5 sec and ON for 0.5 sec. ON for 3 sec. - OFF - ON for 3 sec.- OFF/ON - OFF/ON -OFF/ON - OFF - repeat The following table describes how to interpret the control card status.


Blinking #





None required


Photo Eye Error

Clean the reflector. Check the eye alignment.


Jam Time Error

Clear the zone if jammed. Check if the polarity setting of photo-eye is correct, NPN versus PNP


Control Card Thermal Fault

Check to see if there is adequate ventilation.

Check to see if the roller is jammed or overloaded.

Check product weight. Check loading on decline beds with slider pans.

Make sure the ambient air temperature is less than 125°F.

If the card has shut off due to reaching an internal temperature of 167°F, allow the card to cool to 158°F and it will automatically reset.


Roller Thermal Fault

The drive roller stops when its internal temperature reaches 212° F.

Let the drive roller cool. When its internal temperature is below 194° F, it will restart.

Check if the roller connector is plugged in.


Roller Lock/Overcurrent Fault

Check if the zone is clear. Check if the power roller is locked by tape or debris or over-current by heavy load.

The roller will attempt to start after a ten second delay


Power Low-Voltage Error

Check to see if the voltage is below 21.5VDC.

Check to see if the power supply is overloaded.

Check the dip switch settings and voltage on the power supply.


Slave Card Error (Master mode)

Check the error status of the Slave card error indicator and resolve.


Short to Ground Fault



Hall Sensor Fault

Check motor connector and wires for any short/open connections.


Related items


Internal Notes


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Reason for confidentiality



[Section is meant for a brief reason for any data recorded in Internal Notes above, or any reason that the general article cannot be released to the public. Can be updated to #Validated once reused and agreed by KCS Contributor]

***If there is information in this section prior to migration to SalesForce, then it may NOT be published. This information will be fully visible along with all information above.***



Information in this document is subject to change without notice and does not represent a commitment on the part of Intelligrated. This information is typical of the questions and general advice given; however, your particular case and circumstances may produce different results or require different recommendations. Therefore, use of this information is not a suitable replacement for contacting Intelligrated Technical Service engineering for specific recommendations and solutions to your application.


No part of this article may be reproduced or transmitted in any form or by any means including recording, or information storage and retrieval systems, for any purpose without the express written permission of Intelligrated. All information contained within the article is private and confidential and the sole property of Intelligrated.


In no event, shall Intelligrated be liable for any damages whatsoever including, without limitation, damages for loss of business profits, business interruption, loss of business information, or other pecuniary loss, even if Intelligrated has been advised of the possibility of such damages. Because some states do not allow the exclusion or limitation of liability for consequential or incidental damages, the above limitation may not apply to you.


Template updated 2022-09-20 kwk Pending approval

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 Article Info
 Article ID:  KB-11589
 Published on  2/27/2023
 Last Modified on  2/27/2023
 Last Modified by  Nikhil Mandakhalikar
 Original URL:
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