User Manual

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Siemens Building Technologies SED2 LON Module Operating Instructions CE1B5193en
HVAC Products 7 Troubleshooting 26.06.2006
7 Troubleshooting
WARNING:
Make sure that the VSD is deenergized (off) before you install or remove the LON
module.
7.1 Status LED functionality
A tri-color LED provides indication of current LON module operating status and error
conditions, such as if more than one SNVT is bound by L
ONWorks. The following table
describes the LED indication.
LED Color &
State
Indication
Dark No power is supplied
Red, flashing A hardware fault or software error has occurred.
If this status is steady (remains flashing), the LON module or VSD could
be defective.
On the LON side, the LON module is unconfigured (normal state when
not put into operation or when decommissioned with the tool).
Red, on steady The LON module starts, but it does not communicate with the VSD; VSD
operation is disabled.
There could be a possible binding error on SNVT 9-13 or SNVT 14-18.
LON module with no application (NXE file not available?).
Green/Red
flashing
The LON module starts, and the VSD operates normally.
There could be a possible binding error on SNVT 19-23 or SNVT 24-28.
The LON module is in the configuration bypass state.
Yellow, flashing The LON module starts, and it communicates with the VSD.
There is no connection to the LONWorks network, or the network con-
nector is not inserted in the LON module, or the network connector is
disconnected.
Yellow, on
steady
The LON module starts, it communicates with the VSD, and connection
to the L
ONWorks network is established.
No cyclical data exchange is occurring.
Green, flashing The LON module starts and it communicates with the VSD. The connec-
tion to the L
ONWorks network is established and cyclical process data
exchange is in progress.
Setpoint data is invalid.
The LON module has received a handshake command. The LED flashes
for about 60 seconds.
Green, on
steady
The LON module starts and communicates with the VSD. The connec-
tion to the L
ONWorks network is established and cyclical process data
exchange is in progress and OK.
If the advanced operator panel (AOP) is plugged into the LON module during operation,
communication of the relevant node can be interrupted and must be reopened by the
LON module. This means that the VSD will stop the motor and requires a new start
command when communication is restored.
By contrast, the basic operator panel (BOP) can be plugged in and removed without
impacting communication.
Status LED indication
Use of advanced
operator panel (AOP)
on the LON module