GL300M Series User Manual
QSZTRACGL300MUM0001
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4. Troubleshooting and Safety Info
4.1.
Troubleshooting
Trouble
Possible Reason
Solution
After GL300M Series is
turned on, the CEL LED
always flashes quickly.
The signal is too weak; GL300M
Series isn’t registered to the
network.
Please move GL300M Series to
a place with good LTE
coverage.
Messages can’t be
reported to the backend
server by GPRS.
APN is wrong. Some APNs cannot
visit the internet directly.
Ask the network operator for
the right APN.
The IP address or port of the
backend server is wrong.
Make sure the IP address for
the backend server is an
identified address in the
internet.
GL300M Series is unable
to power off.
The function of power key is
disabled by
AT+GTFKS
.
Enable the function of power
key by
AT+GTFKS
.
GL300M Series is unable to power
off if charger is connected or
external battery is used.
Disconnect charger or external
battery and try again.
There is no response
from UART when
GL300M Series is
configured by using
UART.
GL300M Series is in power saving
mode.
Remove the Data_Cable_M,
and plug it in again. After that,
GL300M Series will exit from
power saving mode for 10
seconds.
Re-try GL300M Series
Manager Tool to wake up the
device.
GL300M Series can’t get
successful GPS fix.
The GPS signal is weak.
Please move GL300M Series to
a place with open sky.
It is better to let the top
surface (which comes with
LED indicators) face the sky.
4.2.
Safety Info
Do not disassemble the device by yourself.
Do not put the device in the overheated or too humid place, and avoid exposure to
direct sunlight. Too high temperature will damage the device or even cause battery
explosion.
Do not use GL300M Series on the airplane or near medical equipment.
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