Card Reader Line Troubleshooting

You May have an Electrical Short if:

1. Card readers have power but no vend price, where they did before.
2. Card readers are completely blank with no LCD display showing.
3. Card reader displays will sporadically change to “See Attendant Temporarily Out of Service” then back to normal vend price.
4. A red “FAULT” light glows on the CCI Control Head near one of the ports (Local Reader, Lines 0-4).
5. Card reader program WCRD cannot stay stable and crashes multiple times until it gives up. This gray pop-up window recurs every 10-20 seconds lasting between 5-10 minutes:
   
   
   
   
6. Card readers receive low poll counts or generate a red line atop the welcome screen.
   1. Poll counts represent the health of communication between card readers and the computer. These counts should be refreshed and referred to often during the troubleshooting process. There are 9 columns in the WCRD section of Store Status, the most commonly used are PollCnt and RspOK.Pay attention to the fractions for these two columns; the number before a forward slash should be very close (if not equal) to its counterpart in the neighboring collumn. If this is not the case, (as illustrated below) be ready to test all cables near the low polls.
      
      BAD-->   GOOD--> 

MachID: Unit Address

Lin: Line number (0-4)

Sta: Machine Status (1-12) -> Learn More

PollCnt: Signals sent to card reader by the computer

RspOK: Signals sent to computer by the card reader

What to Know Before You Begin

1. Which computer has the Primary database? This one should not be turned off unless database responsibility has been failed over.
2. Which computer is running the card reader program WCRD in Master mode? The other computer(s) should be running WCRD in Backup mode.
3. Are all cables physically intact and fully seated in their proper locations? Spare card readers/cables and a Cat. 5 tester are recommended.
4. Are there two SeaPorts [4 RS232 jacks], a SeaLink [8 RS232 jacks], or a Control Head installed?
5. Has the Primary database or WCRD Master computer been rebooted recently? If not, it could be running low on memory and having trouble running its applications.
6. Was there a storm or power surge? If so, there could be damage to the computer or anything connected to it.
7. For Version 1 tall cabinets: Check the circuit breakers in X-Changer A. There are usually 4 of them (line is on circle is off). Verify they are on and have not tripped due to a power surge. If the power breakers are tripped, it may be caused by  one of the lines. To identify which line is causing the breakers to trip, unplug all lines an add back one line at a time to see which line causes the readers to lose communication, or the breaker to trip.
   
   
   
   

Begin Troubleshooting

Disconnect the link between X-Changers A and B. This crossover cable (C-1036) is thick and gray in color with RS232 (thumb screw) connections at either end, and can be unplugged from either Control Head. In the case of an older store, this cable will be located at the bottom of a green distribution board mounted vertically in the cabinet. This forces one computer to control vend prices only

Disconnect Line 0 at XB and use Windows Task Manager to end the process WCRD on XA; application KeepAGoin will restart WCRD. If a red light labeled "FAULT" is glowing, the control head device has detected an electrical short, and all cables on this line should be tested. For version 1 cabinets there is no fault light, and line 0 would be second from the top.

Poll counts give clues as to where the problem is; you will see a change in the level of communication. If not, try this method: Find the middle-most card reader and unplug both network cables so it loses power. For this example, readers on XB side will go blank. Reset power to the side being tested (unplug/replug line 0 at XA) to make sure electric current is refreshed after being disconnected from the other half of line 0. If readers show vend price on XA side after a few minutes, the problem is likely on XB side which was previously blank.

Plug the middle-most reader back in and repeat the process at the halfway point of the readers which were previously blank. If only a few come back to normal, the problem is probably with a cable that connects a functional reader to one that's out of order. Continue this way until you observe one connection that brings the entire line down, then test and/or replace that cable. Sometimes Cat. 5 ports on card readers stop working, always try both ports when testing.

An alternate way of doing the same thing is to connect one card reader at a time beginning with the "home run" back to the WCRD Master cabinet. If vend prices do not display with even one card reader connected, then the "home run" cable or a device inside the cabinet may be the issue...at which point you should fail WCRD over and try testing from the opposite direction. After adding a reader, be sure it loads prices and can pulse (start) equipment before moving on. As previously stated, a bad connection will eventually be made that prevents a new one from being added and/or takes the previously connected and functioning readers back out of service. 

After Faulty Items Have Been Repaired

1. Plug Line 0 back into XB (Backup WCRD computer) and make sure all connections to card readers are fully-seated.
2. Re-connect the crossover cable, then unplug Lines 0-4 on X-Changer A to make sure the readers will work on signal from crossover only.
3. Fail WCRD to the other computer and repeat the tests, making sure the store can run the Cat.5 lines alone, then through the crossover cable.
4. Test start the equipment again if desired.

Card Reader Problem Causes

1. Overheating from a build-up of lint.
2. RJ45 (Cat. 5) port corrosion damage.
3. Chemical vapor, sulfide or direct contact with water.
4. One reader having same unit address as another.

Related Guides

• Control Head Maintenance