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.