Troubleshooting Steps
CPC D-Box
Page 58 MDE-4318D Competitive Pump and CRIND (CPC) Hardware/Software Start-up and Service Manual · May 2010
Transmit LED (CR37) on CPC D-Box Board is not Lit
Try the following steps until the problem is resolved.
Note: These steps are not in sequential order.
• Ensure that the appropriate pump loop LED (transmit) is lit on the Dispenser Hub (refer to
“Troubleshooting Dispenser Hub LEDs”
on
). If not, verify the following:
- Forecourt installation programming is correct
- Dispenser Hub has obtained a download after the forecourt programming is complete.
If the Dispenser Hub is transmitting properly, perform the following:
• Check cable connectivity from Dispenser Hub to D-Box.
• Warmstart or cycle power at CPC D-Box.
• Verify if JP10 (34 mA) jumper is installed.
• Check voltage at D-Box power supply.
• Check voltage at D-Box power Board.
Receive LED (CR36) on CPC D-Box Board is not Lit
Try the following steps until the problem is resolved.
Note: These steps are not in sequential order.
• Check if loop back connector wires are reversed. Switch the wires and check if it resolves
the problem.
• Verify if the Forecourt Installation is correct.
• Verify if the JP10 (34 mA) jumper is installed.
• Verify if unused loop back connectors are either cut or jump jacks removed.
• If CR36 stays lit on the T20488-G2 when the Dispenser Hub system to CPC D-Box
two-wire cable is disconnected and reconnected, there is a short on one of the CAT
RS-485 pairs.
Slow/Sluggish Response to Customer Actions
If this problem occurs, the CAT Control Board or the Computer Base (Pump) could be
defective. Try the following steps until the problem is resolved.
Note: These steps are not in sequential order.
• Power fail or cycle power at the dispensers (refer to
on
• Ensure that the site is using the latest version of the Passport software for use with the
CPC interface.
• Check for electrical noise (refer to MDE-3620 POS Site Preparation Manual).
