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Service LED
Patterns and
Descriptions
LED Pattern
Continuously ON
Continuously OFF
ON for one second at power-up
followed by approximately 2
seconds OFF, then stays ON
Short flash every 3 seconds
Flashing at 1 second intervals
Brief flash at power-up. OFF
duration approximately 10
seconds after which stays ON
Brief flash at power-up. OFF
duration approximately 1 to 15
seconds, depending on
application size and system
clock. LED then begins flashing
at 1 second intervals.
Brief flash at power-up followed
by OFF
24
VLT
®
Operation
Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Power-up/Reset
Anytime
Anytime
Using EEBLANK or Neuron
3150 chip-based node
First power-up with new
PROM on Neuron 3150 chip-
based custom node.
Unconfigured firmware state
exported.
Service LED Pattern Descriptions
5000 / VLT
®
6000 HVAC / VLT
Description
Use EEBLANK and follow
reinitialization procedure.
Indicates bad node hardware.
May be caused by Neuron chip
firmware when mismatch occurs
in application checksum.
Indicates watchdog timer resets
occurring.
Possible corrupt EEPROM.
For Neuron 3150 chip-based
node, use EEBLANK and follow
reinitialization procedure.
Indicates node is unconfigured
but has an application. Proceed
with loading node.
Indicate completion of blanking
process.
Indicates unconfigured state.
Node is configuring and running
normally.
MG.60.N2.02 - VLT is a registered Danfoss trademark
®
8000 AQUA
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