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Andover Controls
Indicator Descriptions
The following describes the functions of each of the status indicators on the front panel:
CPU Status Indicators
POWER
The power status indicator is ON if the NetController module is receiving power from
the power supply.
CPU
The CPU (for
Central Processing Unit
) indicator flashes once every 0.1 seconds if
the NetController module is active—many refer to this indicator as the NetController’s
“heartbeat.”
SCAN
The scan indicator flashes once for every scan executed by NetController.
ERROR
The ERROR indicator remains OFF until an error occurs.
If the NetController fails an internal system test, the ERROR indicator blinks a preset
number of times, then pauses, and repeats the blinking and pausing sequence—this
blinking pattern will persist until you reset the controller. The number of blinks
between pauses identifies the specific problem (as shown in the table below).
ERROR Indicator Blink Rates
Blinks before a Pause
1 blink
2 blinks or 7 blinks
12 blinks
Type of Failure
ROM Test Failed
EnergyNet
Test Failed
RAM Test Failed
Note: If an Andover Controls
Plain English
program disables due to an error, the
ERROR indicator illuminates and stays ON (without blinking)—if this occurs, you can
turn the indicator off by setting the
ERRORS
system variable to 0 through software.
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