Honeywell CENTRA LINE MERLIN NX Series - TROUBLESHOOTING; BACnet and Modbus LED Status; Bluetooth LED Status

MERLIN NX IP AND MST/TP VAV CONTROLLER - INSTALLATION INSTRUCTIONS
EN1Z-1076GE51 R0722 28
TROUBLESHOOTING
The controller features the following LEDs:
Fig. 34. LED interface
BACnet and Modbus LED Status
Bluetooth LED Status
BACnet
Tx &Rx
MODBUS
Tx &Rx
BLE
STATUS
Table 10. BACnet and Modbus LED Status
Mode Status
Tx and Rx LED
Status
Visual
BACnet Tx1 Fail OFF
BACnet Tx1 Success Blinking
BACnet Rx1 Fail OFF
BACnet Rx1 Success Blinking
Modbus Tx2 Fail OFF
Modbus Tx2 Success Blinking
Modbus Rx2 Fail OFF
Modbus Rx2 Success Blinking
Table 11. Bluetooth LED Status
Mode LED Status Visual
BLE disabled by user OFF
BLE normal operation and
connected
Green, permanently ON.
BLE enabled but not
connected
Green, 2 blinks in 1 s followed by 2 s
pause, and repeat.
BLE failure Red, permanently ON.