IC Realtime 4 Channel PoE Mobile Network Video Recorder - Manual (Page 155)

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Please make sure you have inserted the card.
You have not installed the antenna or the connection is not sound.
The centre 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.
Daily Maintenance
Do not allow other objects falling into the NVR (such as water), it may result in device
malfunction.
Always follow the transportation instructions. Do not transport the NVR upside down.
Please pay attention to the cable connection. The improper connection steps may result in
device malfunction or damage.
Please make sure all the external cables have soundly earthed.
Before you connect the power cable, please make sure other cables have properly
connected.
Use the cable strap in case there is short circuit, electric shock.
Please keep the power cable neat in case it obstacles the driver or the passenger.
Please remove the negative end (-) of the connection terminal before you configure the cable.
Please unlock the key before you draw out the HDD box. Otherwise it may result in device
damage.
When washing the vehicle, please keep the NVR away from the water. Otherwise it may
result in short circuit, fire or device malfunctions.
Please make sure the NVR is away from the direct sunlight or other heating sources. Please
keep the sound ventilation.
Please use the brush to clean the board, socket connector and the chassis regularly.
The NVR shall be soundly earthed in case there is audio/video disturbance. Keep the NVR
away from the static voltage or induced
143H143H
voltage.
Please unplug the power cable when you remove the audio/video signal cable, RS232 or
RS485 cable.
Please check the NVR is secured firmly and horizontally. Please make sure the anti-vibration
component can work properly.
Please check and maintain the NVR regularly.