Honeywell TB7600 Integration Manual page 7

Network Adapter Status LED
Table 3 shows the different possibilities with the Status LED behavior of the BACnet module.
Condition of the Status LED
1 short blink
2 short blinks (no wires connected
to the module)
2 short blinks (wires connected to
the module)
2 short blinks and a longer blink
(wires connected to the module)
Right after power is applied: 2 long
blinks and then no blinking
BACNET INTEGRATION MANUAL FOR TB7600 SERIES THERMOSTATS
Table 3. Status LED condition and possible solutions
Possible Cause
BACnet communication NOT active at
default MAC address = 254
The BACnet module is recognized on
the thermostat and has been installed
on the right thermostat model
Module is not at the same baud rate as
the network
The module has detected the presence
of a network
Polarity has been reversed at the
module
Change MAC address to another
value from 0 to 127
N/A
Power off and on the thermostat
N/A
Reverse polarity at the module
7
Solution
63-4523—02