Troubleshooting Guidelines

Power Supply Unit

Terminal fails to power on even when connected to a confirmed functional wall outlet.

1

Unplug the PSU

Unplug the PSU from the wall mains socket.

2

Disconnect the terminal

Disconnect the 24V DC barrel connector from the rear power port of C18 R2.

NOTE: Connect the DC barrel plug to the terminal first, then plug the AC mains cord into the wall outlet when reinstalling a new PSU.

System Reset Instructions

The C18 R2 terminal is designed for continuous mains power operation post-installation. Follow this procedure for forced reboot:

1

Disconnect power

Unplug the power supply adapter from the wall socket.

2

Trigger controlled power-off

Flip open the side interface cover, insert a pin into the RESET button and hold for 5 seconds to trigger controlled power-off.

3

Confirm shutdown and restore power

Confirm all LED indicators on the terminal are fully extinguished, then reconnect the PSU to mains power.

4

Allow the terminal to boot

The automatic boot sequence will initiate upon power restoration.

C18 R2 Fails to Power On

1

Verify mains voltage

Verify the wall power outlet supplies stable mains voltage.

2

Test the PSU

Test with a spare compatible PSU adapter.

3

Replace the mainboard

If the issue persists after PSU replacement, replace the mainboard assembly.