This section contains troubleshooting information for your Comtrol® device. You should review the following information before calling Technical Support because they will request that you perform many of the procedures or verifications before they will be able to help you diagnose a problem.

If you cannot diagnose the problem, you can contact Comtrol Technical Support.

Troubleshooting Checklist

The following checklist may help you diagnose your problem:

Verify that you are using the correct types of cables on the correct connectors and that all cables are connected securely.

Note
Most customer problems reported to Comtrol Technical Support are eventually traced to cabling or network problems.
Reboot the system and the Comtrol device.
If you have a spare Comtrol device, try replacing the device.

General Network Troubleshooting

Review the following for general network troubleshooting.

Reset the power on the Comtrol device and watch the PWR or Status light activity. If the device has a power switch, turn the device’s power switch off and on, while watching the LED diagnostics.

If the unit does not have a power switch, disconnect and reconnect the power cord.

PWR or Status LED	Description
5 sec. off, 3 flashes, 5 sec. off, 3 flashes ...	Redboot™ checksum failure.
5 sec. off, 4 flashes, 5 sec. off, 4 flashes ...	SREC load failure.
5 quick flashes	The default application is starting up.
10 sec. on, .1 sec. off, 10 sec. on .1 sec. off ...	The default application is running.

Reduce network traffic by installing a second NIC in the host and connect directly to the device.
Verify that the Ethernet hub, switch, or router and any other network devices between the system and the Comtrol device are powered up and operating.
Verify that the IP address programmed into the Comtrol device matches the unique reserved IP configured address assigned by the system administrator.
Verify that the network IP address is correct. If IP addressing is being used, the system should be able to ping the Comtrol device.

Network Device Connectivity

You can use the table below to verify that you are using the correct cable in the proper connector.

Product Type	Connected to	Ethernet Cable	Connector Name
DeviceMaster UP 1	Hub, switch, router, or NIC	Standard	10/100 ETHERNET
DeviceMaster UP 1 Embedded	Hub, switch, router, or NIC	Standard	RJ45 port (not labeled)
DeviceMaster UP 2/1E - Single Ethernet Port	Hub, switch, router, or NIC	Standard	10/100
DeviceMaster UP 2/2E - Dual Ethernet Ports	Hub, switch, router, or NIC	Standard	10/100 - 1E/2E
DeviceMaster UP 4	NIC	Standard	DOWN
DeviceMaster UP 4	Hub, switch, or router	Standard	UP

	06/11/14	Home \| Comtrol Support
	Copyright © 2014 Comtrol Corporation.