17
8.
Problems and solutions
Problem
：
Tracker can not turn power switch on
Possible cause
resolution
Low battery
Please connect external power
Problem: The tracker do not reply the SMS
Possible cause
resolution
The GSM antenna conjunction
isn't connected firmly
Please reconnect the GSM antenna
The GSM antenna conjunction is
incorrect
Make sure the GSM antenna and the GSM connecting base are connected
The GSM network is busy
Wait for a message. The GSM network may reply slowly when busy time
or equipments breakdown
Password or command is wrong
Please use correct password and command format
Not enough SIM balance
Please change or recharge the SIM card
The SIM
damaged or warped
Please check the SIM card, sweep metal of card to get in touch with a
point, If still invalid then replace SIM card
Problem: SMS received with latitude and longitude for zero
Possible cause
resolution
The GPS antenna conjunction isn’t
connected firmly
Please reconnect the GPS antenna
The GPS antenna conjunction is
incorrect
Make sure the GPS antenna links the GPS conjunction
The tracker has already blocked
the GPS signal
Move the tracker to open area w/o any tall building, tree and heavy
raining. Those can shield GPS signal
The GPS signal is weak
Place the GPS antenna face to the sky
problem
：
Can not connect the server by GPRS
Possible cause
resolution
The SIM card can not support the
GPRS function
Enable the SIM card’s GPRS function
The GPRS function has been
disable
Enable the GPRS function
Incorrect IP address or PORT
Get the right IP address and port, then reset the device
The GSM signal is weak
Move the tracker to a place with strong GSM signal
