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6 January 2012 / GPRS Module / EN
4 TROUBLE SHOOTING
Malfunction Description/ possible cause What to do
Module can not start up,
Status indicates No SIM.
Communication LED blinks
red.
Check that SIM card is not damaged and
has been inserted correctly.
Module can not connect,
Status indicates PIN code
error. Communication LED
blinks red.
Refer to section 2.2 Check PIN code in configuration tab.
Status indicates Config. error
(configuration error).
SIM status tells No Sim.
Communication LED blinks
red.
A wrong phone number has been
entered.
Check that all numbers in the ‘Safe
Numbers’ tab comply with the
international numbering format.
An incorrect PIN code was entered
three times and the SIM card has
become locked.
Remove the SIM card from the GPRS
Module and unlock it with the PUK code,
using a mobile phone for example.
Status indicates no or poor
signal.
The antenna has not been
connected correctly.
Check if the antenna is fixed to the
module tightly. If not, disconnect the
power supply and fix the antenna. Then
reconnect the power supply.
The GPRS module uses the land
based GSM network and will
therefore not operate in remote
locations.
Make sure that the GPRS module is
placed in a location with sufficient
reception. This can be checked using a
regular mobile telephone.
Status indicates Standby. The GPRS module will not send or
receive text messages while in
standby.
Set the function Enable SMS’s to On.
Status indicates “connecting”,
nothing further happens.
The GPRS module uses the land
based GSM network and it will not
connect in remote locations. It will
not connect either if the SIM card
provider does not cover the region.
Status indicates
average/good/excellent signal
but still no responses.
The telephone number used is
wrong.
Ensure that text messages are being sent
to the correct telephone number. This
may require an international number
format when abroad.
At least one of the Safe numbers is
wrong.
If ‘Filter numbers’ has been selected then
ensure that the entered ‘Safe numbers’
are correct. To bypass the Safe numbers,
clear the ‘Filter numbers’ checkbox and
send a message to the GPRS module. It
then responses to the incoming number
rather than using the safe numbers.
Still no response. The SIM card or the GPRS
transmitter/ receiver may fail.
Remove SIM card from GPRS module
and test SMS communication using a
mobile telephone. If communication is OK
now, the SIM card seems all right.
Slow communication SMS delivery times vary
considerably and may not even be
guaranteed depending on the
provider, location and time.
Allow sufficient time for delivery.
6


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