Glensound Electronics GS-MPI004, Manual

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TROUBLESHOOTING
Problem Cause Solution
“BATT LOW” LED is flashing.
Battery voltage is low, but unit should
continue to operate correctly for the
moment. A shorter flash period denotes
a flatter battery.
Consider changing batteries, or connect
external DC supply.
“BATT LOW” LED is on solid.
Battery voltage is sufficiently low that
the device will not operate correctly. Change batteries, or connect external
DC supply.
GSM unit fails to register with network
(Red
“ON-HOOK” LED and green
“OFF-HOOK” LED are both off,
“SOUNDER” LED is not flashing).
SIM card has not been inserted.
Insert SIM card, then turn unit off and
on again.
“SOUNDER” LED starts flashing after
power-on.
SIM PIN code is enabled on SIM card. Type in 4-digit SIM PIN code.
GSM unit fails to register with network
(Red
“ON-HOOK” LED continues to
flash for more than a few seconds at
start-up), but
“BATT LOW” LED is not
on or flashing.
2) Signal strength is too low.
3) Unsuitable GSM antenna is fitted.
4) Momentary glitch on GSM network.
Move unit within range of a mobile
phone mast.
Fit a suitable GSM antenna.
Turn unit off then on again.
GS-MPI004 / 5 Manual – Issue 2 11