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Alarm input signal is not correct.
There are two loops connect to one alarm device.
18. Remote control does not work.
There are following possibilities:
Remote control address is not correct.
Distance is too far or control angle is too small.
Remote control battery power is low.
Remote control is damaged or DVR front panel is damaged.
19. Record storage period is not enough.
There are following possibilities:
Camera quality is too low. Lens is dirty. Camera is installed against the light. Camera
aperture setup is not correct.
HDD capacity is not enough.
HDD is damaged.
20. Cannot detect SIM card
There are following possibilities:
There is no SIM card.
SIM card direction is wrong.
SIM card is malfunction.
21. My cell phone 3G dial failed.
There are following possibilities:
You have not installed the dial module or your installation is not right.
Please make sure you have inserted the card.
You have not installed the antenna or the connection is not sound.
The center platform configuration is not right or the registration is not effective.
The cell phone remaining sum is not sufficient.
Signal is too weak.
SIM card does not support corresponding service.
22. 3G platform is offline
There are following possibilities:
Refer to the above item to check 3G dial function is OK or not.
Check local auto register function setup.
Check server setup.
23. No GPS data
There are following possibilities:
Check GPS antenna connection
GPS antenna environment is free of block object.
Vehicle data module is running or not.
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