Troubleshooting
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5 Troubleshooting
5.1 Service LED
The service LED indicates the operating condition of the WattNode firmware. Many problems can be
diagnosed by observing the service LED. Figure 5.1 shows the different behaviors of the WattNode service
LED after power up. During normal operation, after the initial power up, the LED should remain OFF. In
addition, the service LED should always light while the service button is being pressed: this can be used to
test that the WattNode is powered. The following terms describe the various states of the WattNode.
Unconfigured – The WattNode is operating properly, but has not yet been configured (installed) by
network management software.
Configured – The WattNode is operating properly and has been configured by network management
software.
Internal Error – The WattNode is not functioning correctly and must be returned for service.
0
1
2
3
4
5
6
7
8
Power
Applied
to Node
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Time
(seconds)
Configured
Unconfigured
Internal Error #1
Internal Error #2
Internal Error #3
Internal Error #4
Figure 5.1: Service LED Behaviors
Any pattern of LED flashing not described by Figure 5.1 should also be treated as an internal error, and the
WattNode returned for service. Before returning the WattNode, try cycling power at least once and
observing the LED carefully. If possible, note the LED behavior, as this will help with diagnosing the
problem.
