GL100S User Manual
TRACGL100SUM001
- 9 -
4. Troubleshooting and Safety info
4.1. Troubleshooting
Trouble
Possible Reason
Solution
After GL100S is turned on, the
Net LED flashes quickly
always.
The SIM card is not inserted.
Please insert the SIM card into
GL100S.
The signal is too weak;
GL100S can’t register to the
network.
Please move GL100S into
place with good GSM
coverage.
PIN locked
Using SIM card without
SIM-PIN, or unlock SIM-PIN.
Messages can’t be reported to
the backend server by GPRS.
The SIM card in GL100S
doesn’t support GPRS.
Try a GPRS supported SIM
card.
APN is wrong. Some APN
can not 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.
Unable to power off GL100S.
The function of power key
was disabled by AT+GTSFR.
Enable the function of power
key by AT+GTFKS.
Unable to power off GL100S
if charger connected or using
external battery.
Disconnect charger or external
battery, and try again.
No response from UART when
configure GL100S through
UART
GL100S is in power saving
mode.
Remove the Data_Cable, and
plug it in again. After this
operation, GL100S will exit
from power saving mode for 10
seconds.
Re-try GL100S manager tool
again, it will try to wake up
device.
GL100S can’t get successful
GPS fixing.
The GPS signal is weak.
Please move GL100S to a
place with open sky.
It is better to let the top surface
face to sky.
