24
MG.60.N1.22
- VLT is a registered Danfoss trademark
VLT
®
5000 / VLT
®
6000
HVAC / VLT
®
8000 AQUA
Service LED
Patterns and
Descriptions
Service LED Pattern Descriptions
LED Pattern
Operation
Description
Continuously ON
Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Use EEBLANK and follow
reinitialization procedure.
Continuously OFF
Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Indicates bad node hardware.
ON for one second at power-up
followed by approximately 2
seconds OFF, then stays ON
Power-up/Reset
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.
Flashing at 1 second intervals
Anytime
Indicates node is unconfigured
but has an application. Proceed
with loading node.
Brief flash at power-up. OFF
duration approximately 10
seconds after which stays ON
Using EEBLANK or Neuron
3150 chip-based node
Indicate completion of blanking
process.
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.
First power-up with new
PROM on Neuron 3150 chip-
based custom node.
Unconfigured firmware state
exported.
Indicates unconfigured state.
Brief flash at power-up followed
by OFF
Node is configuring and running
normally.
Short flash every 3 seconds
Anytime
