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126
9 FAQ
If your questions cannot be answer by the following contents, please contact your local service
engineer or the service of our Headquarters for help. We can guide you to solve this problem.
1) Q: Disconnect the constant electricity but the Recorder is still working.
A: Possible causes:
The default 5-minute shutdown delay is effective.
The UPS setting provides constant power supply to the Recorder when the lithium battery
voltage is above 7V.
ACC is connected.
2) Q: The Recorder gives squeal after it is boot up.
A: Possible causes:
Connecting to the display and being too close to the camera.
A single channel interface or a large-image multi-channel interface. The first channel of
sound comes from a local source.
3) Q: The interface shows that no SIM card is detected.
A: Possible causes:
SIM card not inserted.
Micro SIM card reversely inserted with its notch facing outward. Follow instructions on the
label to insert the SIM card.
SIM card is damaged.
4) Q: DVR cannot boot up properly.
A: Possible causes:
The input power is not correct; the input voltage is too low or too high.
Poor contact in the input power cable or incorrect wiring.
HDD is damaged or poor contact between the HDD carrier and HDD.
Main board is damaged.
5) Q: DVR automatically reboots or frequently crashes.
A: Possible causes:
Input voltage is not stable or too low.
The Recorder is not properly installed, which result in poor contact between components.
Poor heat dissipation and too many dusts result in poor working environment for the
Recorder.
Hardware malfunction.
6) Q: HDD cannot be detected after rebooting.
A: Possible causes:
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