Question/Problem

 MDR 710 Card LED Diagnostic information 

 

Environment

 MDR  710 Control card

 

Answer/Solution

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 #	Situation	Action
0	Normal	None required
1	Photo Eye Error	Clean the reflector. Check the eye alignment.
2	Jam Time Error	Clear the zone if jammed. Check if the polarity setting of photo-eye is correct, NPN versus PNP
3	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.
4	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.
5	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
6	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.
7	Slave Card Error (Master mode)	Check the error status of the Slave card error indicator and resolve.
8	Short to Ground Fault
9	Hall Sensor Fault	Check motor connector and wires for any short/open connections.

 

Related items

 

https://honeywellprod.sharepoint.com/teams/productdocs/Shared%20Documents/Hardware/MDR/MDR%20710%20WWL%20Maintenance%20Manual.pdf#search=MDR

 

Internal Notes

 

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Reason for confidentiality

 

#NotValidated

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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.

 

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Template updated 2022-09-20 kwk Pending approval