iRZ TU31, Руководство по эксплуатации

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17
4. Emergencies
To facilitate the use of the modem, tracking and display of emergencies are provided.
4.1. Emergency 1 (incorrect input power supply)
Emergency 1 occurs when the controlling internal voltage deviates from the permissible value. The modem
stops operating: and switches off GSM module power supply. Emergency is indicated by continuously lit red
LED. The recovery is possible only when the controlling internal voltage is re-established.
4.2. Alarm 2 (incorrect module power supply)
Emergency 2 occurs when GSM module's' power supply deviates from the permissible value. The
modem stops operating and switches off GSM module power supply. A red LED signals that the emergency
has occurred (0.5s on / 0.5s off). The recovery is possible only if the module power supply is re-established
within 10 seconds after the emergency has occurred. If within 10 seconds the module power supply remains
incorrect (with a correct input power supply), the modem goes into the waiting mode meaning that the modem’s
power supply is turned off, the emergency indication is preserved. The waiting mode can be terminated only
after the power is completely disconnected.
4.3. Emergency 3 (GSM module failed to run)
Emergency 3 occurs if the GSM module does not turn on or is absent. A red LED signal
(0.25s on / 0.25s off / 0.25s on / 1s off) turns on after the modem precisely detects the emergency situation
(~15 sec). The recovery is possible only after a successful launch of the GSM module. After 10 unsuccessful
attempts to launch the module, the modem goes into the waiting mode.
The modem’s power supply is turned
off, the emergency indication is preserved. The waiting mode can be terminated only after the power is
completely disconnected.
In case of repeated emergency, the modem should be serviced.