3.3 Trouble Shooting
Problem 1 All LEDs do not light up
Answers:
(1) Check all cables that are connected to the DTU.
(2) Check the power supply adapter output voltage.
(3) DTU works normally if the PWR LED flash at 1Hz frequency and it is in
configuration status if the PWR LED lights up constantly.
Problem 2 NET LED does not light up
Answers:
NET LED will flash when RemoDAQ-8554A GPRS DTU logged in mobile network.
If the NET LED does not light up, you should check the area receiving RF signal
and check the SIM inserted correctly.
Problem 3 DATA LED does not light up
Answers:
DATA LED will flash when there is data transmitting over the interface.
Problem 4 All LED indications are normal, but it can not transmit traffic data.
Answers:
Consult with the local mobile operator, to confirm it is covered with GPRS service.
Meanwhile, check the DSC IP Address and Communication Port setting.
